add eslint + prettier

reformat code with prettier

.eslintrc.json

@@ -0,0 +1,15 @@
+{
+    "env": {
+        "es2020": true,
+        "node": true
+    },
+    "extends": ["eslint:recommended", "plugin:prettier/recommended"],
+    "plugins": ["prettier"],
+    "parserOptions": {
+        "ecmaVersion": 11,
+        "sourceType": "module"
+    },
+    "rules": {
+        "prettier/prettier": "error"
+    }
+}

.prettierrc.json

@@ -0,0 +1,6 @@
+{
+    "tabWidth": 4,
+    "trailingComma": "none",
+    "bracketSpacing": false,
+    "arrowParens": "avoid"
+}

.travis.yml

@@ -4,7 +4,7 @@ node_js:
     - lts/*
     - 11.14.0
 script:
-- node --experimental-modules test/index.mjs
+    - npm test
 
 deploy:
     provider: npm

README.md

@@ -5,9 +5,10 @@ It supports reading/writing from/to a JSON cookie jar and keeps cookies in memor
 
 ### For upgrading from 1.2.x or below to 1.3.x or above, please read the [breaking API changes](#130-breaking-api-changes).
 
-
 ## Usage Examples
+
 ### with file...
+
 ```javascript
 import {fetch, CookieJar} from "node-fetch-cookies";
 
@@ -27,6 +28,7 @@ import {fetch, CookieJar} from "node-fetch-cookies";
 ```
 
 ### ...or without
+
 ```javascript
 import {fetch, CookieJar} from "node-fetch-cookies";
 
@@ -40,31 +42,37 @@ import {fetch, CookieJar} from "node-fetch-cookies";
     });
 
     // do some requests you require login for
-    response = await fetch(cookieJar, "https://example.com/api/admin/drop-all-databases");
+    response = await fetch(
+        cookieJar,
+        "https://example.com/api/admin/drop-all-databases"
+    );
 
     // and optionally log out again
     response = await fetch(cookieJar, "https://example.com/api/logout");
 })();
 ```
 
-
 ## Documentation
 
 ### async fetch(cookieJars, url[, options])
+
 -   `cookieJars` A [CookieJar](#class-cookiejar) instance, an array of CookieJar instances or null, if you don't want to send or store cookies.
 -   `url` and `options` as in https://github.com/bitinn/node-fetch#fetchurl-options
 
 Returns a Promise resolving to a [Response](https://github.com/bitinn/node-fetch#class-response) instance on success.
 
 ### Class: CookieJar
+
 A class that stores cookies.
 
 #### Properties
+
 -   `flags` The read/write flags as specified below.
 -   `file` The path of the cookie jar on the disk.
 -   `cookies` A [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) mapping hostnames to maps, which map cookie names to the respective [Cookie](#class-cookie) instance.
 
 #### new CookieJar([file, flags = `rw`, cookies, cookieIgnoreCallback])
+
 -   `file` An optional string containing a relative or absolute path to the file on the disk to use.
 -   `flags` An optional string specifying whether cookies should be read and/or written from/to the jar when passing it as parameter to [fetch](#fetchcookiejar-url-options). Default: `rw`
     -   `r`: only read from this jar
@@ -76,7 +84,9 @@ A class that stores cookies.
     -   `reason` A string containing the reason why the cookie has been ignored
 
 #### addCookie(cookie[, fromURL])
+
 Adds a cookie to the jar.
+
 -   `cookie` A [Cookie](#class-cookie) instance to add to the cookie jar.
     Alternatively this can also be a string, for example a serialized cookie received from a website.
     In this case `fromURL` must be specified.
@@ -86,37 +96,51 @@ Returns `true` if the cookie has been added successfully. Returns `false` otherw
 If the parser throws a [CookieParseError](#class-cookieparseerror) it will be caught and a warning will be printed to console.
 
 #### domains()
+
 Returns an iterator over all domains currently stored cookies for.
 
-#### *cookiesDomain(domain)
+#### \*cookiesDomain(domain)
+
 Returns an iterator over all cookies currently stored for `domain`.
 
-#### *cookiesValid(withSession)
+#### \*cookiesValid(withSession)
+
 Returns an iterator over all valid (non-expired) cookies.
+
 -   `withSession`: A boolean. Iterator will include session cookies if set to `true`.
 
-#### *cookiesAll()
+#### \*cookiesAll()
+
 Returns an iterator over all cookies currently stored.
 
-#### *cookiesValidForRequest(requestURL)
+#### \*cookiesValidForRequest(requestURL)
+
 Returns an iterator over all cookies valid for a request to `url`.
 
 #### deleteExpired(sessionEnded)
+
 Removes all expired cookies from the jar.
+
 -   `sessionEnded`: A boolean. Also removes session cookies if set to `true`.
 
 #### async load([file = this.file])
+
 Reads cookies from `file` on the disk and adds the contained cookies.
+
 -   `file`: Path to the file where the cookies should be saved. Default: `this.file`, the file that has been passed to the constructor.
 
 #### async save([file = this.file])
+
 Saves the cookie jar to `file` on the disk. Only non-expired non-session cookies are saved.
+
 -   `file`: Path to the file where the cookies should be saved. Default: `this.file`, the file that has been passed to the constructor.
 
 ### Class: Cookie
+
 An abstract representation of a cookie.
 
 #### Properties
+
 -   `name` The identifier of the cookie.
 -   `value` The value of the cookie.
 -   `expiry` A [Date](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date) object of the cookies expiry date or `null`, if the cookie expires with the session.
@@ -126,30 +150,38 @@ An abstract representation of a cookie.
 -   `subdomains` A boolean value specifying whether the cookie should be used for requests to subdomains of `domain` or not.
 
 #### new Cookie(str, requestURL)
+
 Creates a cookie instance from the string representation of a cookie as send by a webserver.
+
 -   `str` The string representation of a cookie.
 -   `url` The url the cookie has been received from.
 
 Will throw a `CookieParseError` if `str` couldn't be parsed.
 
 #### static fromObject(obj)
+
 Creates a cookie instance from an already existing object with the same properties.
 
 #### serialize()
+
 Serializes the cookie, transforming it to `name=value` so it can be used in requests.
 
 #### hasExpired(sessionEnded)
+
 Returns whether the cookie has expired or not.
+
 -   `sessionEnded`: A boolean that specifies whether the current session has ended, meaning if set to `true`, the function will return `true` for session cookies.
 
 #### isValidForRequest(requestURL)
+
 Returns whether the cookie is valid for a request to `url`.
 
 ### Class: CookieParseError
+
 The Error that is thrown when the cookie parser located in the constructor of the [Cookie](#class-cookie) class is unable to parse the input.
 
-
 ## 1.3.0 Breaking API Changes
+
 -   `new CookieJar(flags, file, cookies)` has been changed to `new CookieJar(file, flags = "rw", cookies)`.  
     `new CookieJar("rw")` can now be written as `new CookieJar()`, `new CookieJar("rw", "jar.json")` can now be written as `new CookieJar("jar.json")`.  
     This change has been introduced to simplify the usage of this library, since `rw` is used for `flags` in most cases anyways.
@@ -159,6 +191,6 @@ The default value for `file` is the file passed to the constructor.
 -   `new CookieJar()` now doesn't load cookies from the specified file anymore. To do so, call `await CookieJar.load()` after creating the CookieJar.  
     **NOTE: `CookieJar.load()` will throw an error if the cookie jar doesn't exist or doesn't contain valid JSON!**
 
-
 ## License
+
 This project is licensed under the MIT license, see [LICENSE](LICENSE).

package.json

@@ -10,7 +10,7 @@
         "src/"
     ],
     "scripts": {
-    "test": "node test/index.mjs"
+        "test": "npx eslint --ext mjs . && npx prettier --check package.json package-lock.json .travis.yml .prettierrc.json .eslintrc.json README.md && node --experimental-modules test/index.mjs"
     },
     "repository": {
         "type": "git",
@@ -30,5 +30,11 @@
     "homepage": "https://github.com/jkhsjdhjs/node-fetch-cookies#readme",
     "dependencies": {
         "node-fetch": "^2.6.0"
+    },
+    "devDependencies": {
+        "eslint": "^7.2.0",
+        "eslint-config-prettier": "^6.11.0",
+        "eslint-plugin-prettier": "^3.1.4",
+        "prettier": "2.0.5"
     }
 }

src/cookie-jar.mjs

@@ -13,15 +13,26 @@ export default class CookieJar {
             throw paramError("First", "flags", "new CookieJar()", "string");
         if (Array.isArray(cookies)) {
             if (!cookies.every(c => c instanceof Cookie))
-                throw paramError("Third", "cookies", "new CookieJar()", "[Cookie]");
+                throw paramError(
+                    "Third",
+                    "cookies",
+                    "new CookieJar()",
+                    "[Cookie]"
+                );
             cookies.forEach(cookie => this.addCookie(cookie));
-        }
+        } else if (cookies instanceof Cookie) this.addCookie(cookies);
-        else if(cookies instanceof Cookie)
-            this.addCookie(cookies);
         else if (cookies)
-            throw paramError("Third", "cookies", "new CookieJar()", ["[Cookie]", "Cookie"]);
+            throw paramError("Third", "cookies", "new CookieJar()", [
+                "[Cookie]",
+                "Cookie"
+            ]);
         if (cookieIgnoreCallback && typeof cookieIgnoreCallback !== "function")
-            throw paramError("Fourth", "cookieIgnoreCallback", "new CookieJar()", "function");
+            throw paramError(
+                "Fourth",
+                "cookieIgnoreCallback",
+                "new CookieJar()",
+                "function"
+            );
         this.file = file;
         this.flags = flags;
         this.cookieIgnoreCallback = cookieIgnoreCallback;
@@ -30,8 +41,7 @@ export default class CookieJar {
         if (typeof cookie === "string") {
             try {
                 cookie = new Cookie(cookie, fromURL);
-            }
+            } catch (error) {
-            catch(error) {
                 if (error instanceof CookieParseError) {
                     if (this.cookieIgnoreCallback)
                         this.cookieIgnoreCallback(cookie, error.message);
@@ -39,9 +49,11 @@ export default class CookieJar {
                 }
                 throw error;
             }
-        }
+        } else if (!(cookie instanceof Cookie))
-        else if(!(cookie instanceof Cookie))
+            throw paramError("First", "cookie", "CookieJar.addCookie()", [
-            throw paramError("First", "cookie", "CookieJar.addCookie()", ["string", "Cookie"]);
+                "string",
+                "Cookie"
+            ]);
         if (!this.cookies.get(cookie.domain))
             this.cookies.set(cookie.domain, new Map());
         this.cookies.get(cookie.domain).set(cookie.name, cookie);
@@ -56,25 +68,24 @@ export default class CookieJar {
     }
     *cookiesValid(withSession) {
         for (const cookie of this.cookiesAll())
-            if(!cookie.hasExpired(!withSession))
+            if (!cookie.hasExpired(!withSession)) yield cookie;
-                yield cookie;
     }
     *cookiesAll() {
-        for(const domain of this.domains())
+        for (const domain of this.domains()) yield* this.cookiesDomain(domain);
-            yield* this.cookiesDomain(domain);
     }
     *cookiesValidForRequest(requestURL) {
         const namesYielded = new Set(),
             domains = url
                 .parse(requestURL)
-                .hostname
+                .hostname.split(".")
-                .split(".")
                 .map((_, i, a) => a.slice(i).join("."))
                 .slice(0, -1);
         for (const domain of domains) {
             for (const cookie of this.cookiesDomain(domain)) {
-                if(cookie.isValidForRequest(requestURL)
+                if (
-                && !namesYielded.has(cookie.name)) {
+                    cookie.isValidForRequest(requestURL) &&
+                    !namesYielded.has(cookie.name)
+                ) {
                     namesYielded.add(cookie.name);
                     yield cookie;
                 }
@@ -89,12 +100,17 @@ export default class CookieJar {
     async load(file = this.file) {
         if (typeof file !== "string")
             throw new Error("No file has been specified for this cookie jar!");
-        JSON.parse(await fs.readFile(file)).forEach(c => this.addCookie(Cookie.fromObject(c)));
+        JSON.parse(await fs.readFile(file)).forEach(c =>
+            this.addCookie(Cookie.fromObject(c))
+        );
     }
     async save(file = this.file) {
         if (typeof file !== "string")
             throw new Error("No file has been specified for this cookie jar!");
         // only save cookies that haven't expired
-        await fs.writeFile(this.file, JSON.stringify([...this.cookiesValid(false)]));
+        await fs.writeFile(
+            this.file,
+            JSON.stringify([...this.cookiesValid(false)])
+        );
+    }
 }
-};

src/cookie.mjs

@@ -4,7 +4,10 @@ import {paramError, CookieParseError} from "./errors.mjs";
 const validateHostname = (cookieHostname, requestHostname, subdomains) => {
     cookieHostname = cookieHostname.toLowerCase();
     requestHostname = requestHostname.toLowerCase();
-    if(requestHostname === cookieHostname || (subdomains && requestHostname.endsWith("." + cookieHostname)))
+    if (
+        requestHostname === cookieHostname ||
+        (subdomains && requestHostname.endsWith("." + cookieHostname))
+    )
         return true;
     return false;
 };
@@ -12,10 +15,8 @@ const validateHostname = (cookieHostname, requestHostname, subdomains) => {
 const validatePath = (cookiePath, requestPath) => {
     cookiePath = decodeURIComponent(cookiePath).toLowerCase();
     requestPath = decodeURIComponent(requestPath).toLowerCase();
-    if(cookiePath.endsWith("/"))
+    if (cookiePath.endsWith("/")) cookiePath = cookiePath.slice(0, -1);
-        cookiePath = cookiePath.slice(0, -1);
+    if (requestPath.endsWith("/")) requestPath = requestPath.slice(0, -1);
-    if(requestPath.endsWith("/"))
-        requestPath = requestPath.slice(0, -1);
     return (requestPath + "/").startsWith(cookiePath + "/");
 };
 
@@ -41,8 +42,10 @@ export default class Cookie {
         const splitted = str.split("; ");
         [this.name, this.value] = splitN(splitted[0], "=", 1);
         if (!this.name)
-            throw new CookieParseError("Invalid cookie name \"" + this.name + "\"!");
+            throw new CookieParseError(
-        if(this.value.startsWith("\"") && this.value.endsWith("\""))
+                'Invalid cookie name "' + this.name + '"!'
+            );
+        if (this.value.startsWith('"') && this.value.endsWith('"'))
             this.value = this.value.slice(1, -1);
 
         const parsedURL = url.parse(requestURL);
@@ -52,83 +55,120 @@ export default class Cookie {
             k = k.toLowerCase();
             if (v) {
                 if (k === "expires") {
-                    if(this.expiry) // max-age has precedence over expires
+                    if (this.expiry)
+                        // max-age has precedence over expires
                         continue;
-                    if(!/^(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun), \d{2}[ -](?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[ -]\d{2,4} \d{2}:\d{2}:\d{2} GMT$/.test(v)
+                    if (
-                        || (this.expiry = new Date(v)).toString() === "Invalid Date"
+                        !/^(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun), \d{2}[ -](?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[ -]\d{2,4} \d{2}:\d{2}:\d{2} GMT$/.test(
-                        || this.expiry.getTime() < 0)
+                            v
-                        throw new CookieParseError("Invalid value for Expires \"" + v + "\"!");
+                        ) ||
-                }
+                        (this.expiry = new Date(v)).toString() ===
-                else if(k === "max-age") {
+                            "Invalid Date" ||
+                        this.expiry.getTime() < 0
+                    )
+                        throw new CookieParseError(
+                            'Invalid value for Expires "' + v + '"!'
+                        );
+                } else if (k === "max-age") {
                     const seconds = ~~+v;
                     if (seconds.toString() !== v)
-                        throw new CookieParseError("Invalid value for Max-Age \"" + v + "\"!");
+                        throw new CookieParseError(
+                            'Invalid value for Max-Age "' + v + '"!'
+                        );
                     this.expiry = new Date();
                     this.expiry.setSeconds(this.expiry.getSeconds() + seconds);
-                }
+                } else if (k === "domain") {
-                else if(k === "domain") {
+                    if (v.startsWith(".")) v = v.substring(1);
-                    if(v.startsWith("."))
-                        v = v.substring(1);
                     if (!validateHostname(parsedURL.hostname, v, true))
-                        throw new CookieParseError("Invalid value for Domain \"" + v + "\": cookie was received from \"" + parsedURL.hostname + "\"!");
+                        throw new CookieParseError(
+                            'Invalid value for Domain "' +
+                                v +
+                                '": cookie was received from "' +
+                                parsedURL.hostname +
+                                '"!'
+                        );
                     this.domain = v;
                     this.subdomains = true;
-                }
+                } else if (k === "path") this.path = v;
-                else if(k === "path")
+                else if (k === "samesite")
-                    this.path = v;
+                    // only relevant for cross site requests, so not for us
-                else if(k === "samesite") // only relevant for cross site requests, so not for us
                     continue;
                 else
-                    throw new CookieParseError("Invalid key \"" + k + "\" with value \"" + v + "\" specified!");
+                    throw new CookieParseError(
-            }
+                        'Invalid key "' +
-            else {
+                            k +
-                if(k === "secure")
+                            '" with value "' +
-                    this.secure = true;
+                            v +
-                else if(k === "httponly") // only relevant for browsers
+                            '" specified!'
+                    );
+            } else {
+                if (k === "secure") this.secure = true;
+                else if (k === "httponly")
+                    // only relevant for browsers
                     continue;
                 else
-                    throw new CookieParseError("Invalid key \"" + k + "\" specified!");
+                    throw new CookieParseError(
+                        'Invalid key "' + k + '" specified!'
+                    );
             }
         }
 
-        if(this.name.toLowerCase().startsWith("__secure-") && (!this.secure || parsedURL.protocol !== "https:"))
+        if (
-            throw new CookieParseError("Cookie has \"__Secure-\" prefix but \"Secure\" isn't set or the cookie is not set via https!");
+            this.name.toLowerCase().startsWith("__secure-") &&
-        if(this.name.toLowerCase().startsWith("__host-") && (!this.secure || parsedURL.protocol !== "https:" || this.domain || this.path !== "/"))
+            (!this.secure || parsedURL.protocol !== "https:")
-            throw new CookieParseError("Cookie has \"__Host-\" prefix but \"Secure\" isn't set, the cookie is not set via https, \"Domain\" is set or \"Path\" is not equal to \"/\"!");
+        )
+            throw new CookieParseError(
+                'Cookie has "__Secure-" prefix but "Secure" isn\'t set or the cookie is not set via https!'
+            );
+        if (
+            this.name.toLowerCase().startsWith("__host-") &&
+            (!this.secure ||
+                parsedURL.protocol !== "https:" ||
+                this.domain ||
+                this.path !== "/")
+        )
+            throw new CookieParseError(
+                'Cookie has "__Host-" prefix but "Secure" isn\'t set, the cookie is not set via https, "Domain" is set or "Path" is not equal to "/"!'
+            );
 
         // assign defaults
         if (!this.domain) {
             this.domain = parsedURL.hostname;
             this.subdomains = false;
         }
-        if(!this.path)
+        if (!this.path) this.path = "/";
-            this.path = "/";
+        if (!this.secure) this.secure = false;
-        if(!this.secure)
+        if (!this.expiry) this.expiry = null;
-            this.secure = false;
-        if(!this.expiry)
-            this.expiry = null;
     }
     static fromObject(obj) {
         let c = Object.assign(Object.create(this.prototype), obj);
-        if(typeof c.expiry === "string")
+        if (typeof c.expiry === "string") c.expiry = new Date(c.expiry);
-            c.expiry = new Date(c.expiry);
         return c;
     }
     serialize() {
         return this.name + "=" + this.value;
     }
     hasExpired(sessionEnded) {
-        return sessionEnded && this.expiry === null || this.expiry && this.expiry < new Date();
+        return (
+            (sessionEnded && this.expiry === null) ||
+            (this.expiry && this.expiry < new Date())
+        );
     }
     isValidForRequest(requestURL) {
-        if(this.hasExpired(false))
+        if (this.hasExpired(false)) return false;
-            return false;
         const parsedURL = url.parse(requestURL);
-        if(parsedURL.protocol !== "http:" && parsedURL.protocol !== "https:"
+        if (
-        || this.secure && parsedURL.protocol !== "https:"
+            (parsedURL.protocol !== "http:" &&
-        || !validateHostname(this.domain, parsedURL.hostname, this.subdomains)
+                parsedURL.protocol !== "https:") ||
-        || !validatePath(this.path, parsedURL.pathname))
+            (this.secure && parsedURL.protocol !== "https:") ||
+            !validateHostname(
+                this.domain,
+                parsedURL.hostname,
+                this.subdomains
+            ) ||
+            !validatePath(this.path, parsedURL.pathname)
+        )
             return false;
         return true;
     }
-};
+}

src/errors.mjs

@@ -3,10 +3,15 @@ export class CookieParseError extends Error {
         super(...args);
         this.name = "CookieParseError";
     }
-};
+}
 
 export function paramError(position, paramName, functionName, validTypes) {
-    validTypes = [validTypes].flat().map(t => "\"" + t + "\"");
+    validTypes = [validTypes].flat().map(t => '"' + t + '"');
-    validTypes = validTypes.slice(0, -1).join(", ") + (validTypes.length > 1 ? " or " : "") + validTypes.slice(-1);
+    validTypes =
-    return new TypeError(`${position} parameter "${paramName}" passed to "${functionName}" is not of type ${validTypes}!`);
+        validTypes.slice(0, -1).join(", ") +
-};
+        (validTypes.length > 1 ? " or " : "") +
+        validTypes.slice(-1);
+    return new TypeError(
+        `${position} parameter "${paramName}" passed to "${functionName}" is not of type ${validTypes}!`
+    );
+}

src/index.mjs

@@ -6,56 +6,64 @@ import {paramError, CookieParseError} from "./errors.mjs";
 const redirectStatus = new Set([301, 302, 303, 307, 308]);
 
 async function fetch(cookieJars, url, options) {
-
     let cookies = "";
     const addValidFromJars = jars => {
         // since multiple cookie jars can be passed, filter duplicates by using a set of cookie names
         const set = new Set();
-        jars.flatMap(jar => [...jar.cookiesValidForRequest(url)])
+        jars.flatMap(jar => [...jar.cookiesValidForRequest(url)]).forEach(
-            .forEach(cookie => {
+            cookie => {
-                if(set.has(cookie.name))
+                if (set.has(cookie.name)) return;
-                    return;
                 set.add(cookie.name);
                 cookies += cookie.serialize() + "; ";
-            });
+            }
+        );
     };
     if (cookieJars) {
-        if(Array.isArray(cookieJars) && cookieJars.every(c => c instanceof CookieJar))
+        if (
+            Array.isArray(cookieJars) &&
+            cookieJars.every(c => c instanceof CookieJar)
+        )
             addValidFromJars(cookieJars.filter(jar => jar.flags.includes("r")));
         else if (cookieJars instanceof CookieJar)
-            if(cookieJars.flags.includes("r"))
+            if (cookieJars.flags.includes("r")) addValidFromJars([cookieJars]);
-                addValidFromJars([cookieJars]);
             else
-            throw paramError("First", "cookieJars", "fetch", ["CookieJar", "[CookieJar]"]);
+                throw paramError("First", "cookieJars", "fetch", [
+                    "CookieJar",
+                    "[CookieJar]"
+                ]);
     }
     if (cookies) {
-        if(!options)
+        if (!options) options = {};
-            options = {};
+        if (!options.headers) options.headers = {};
-        if(!options.headers)
-            options.headers = {};
         options.headers.cookie = cookies.slice(0, -2);
     }
 
-    const wantFollow = !options || !options.redirect || options.redirect === 'follow';
+    const wantFollow =
+        !options || !options.redirect || options.redirect === "follow";
     if (wantFollow) {
         if (!options) options = {};
-        options.redirect = 'manual';
+        options.redirect = "manual";
     }
     const result = await _fetch(url, options);
     // I cannot use headers.get() here because it joins the cookies to a string
-    cookies = result.headers[Object.getOwnPropertySymbols(result.headers)[0]]["set-cookie"];
+    cookies =
+        result.headers[Object.getOwnPropertySymbols(result.headers)[0]][
+            "set-cookie"
+        ];
     if (cookies && cookieJars) {
         if (Array.isArray(cookieJars)) {
             cookieJars
                 .filter(jar => jar.flags.includes("w"))
                 .forEach(jar => cookies.forEach(c => jar.addCookie(c, url)));
-        }
+        } else if (
-        else if(cookieJars instanceof CookieJar && cookieJars.flags.includes("w"))
+            cookieJars instanceof CookieJar &&
+            cookieJars.flags.includes("w")
+        )
             cookies.forEach(c => cookieJars.addCookie(c, url));
     }
     if (wantFollow && redirectStatus.has(result.status)) {
-        const location = result.headers.get('Location');
+        const location = result.headers.get("Location");
-        options.redirect = 'follow';
+        options.redirect = "follow";
         return fetch(cookieJars, location, options);
     }
     return result;

test/cookie.mjs

@@ -4,196 +4,319 @@ import {CookieParseError} from "../src/errors.mjs";
 export default Test => [
     new Test("new Cookie() / cookie parser", () => {
         const inputs = [
-            [ // type error
+            [
+                // type error
                 123,
                 ""
             ],
-            [ // type error
+            [
+                // type error
                 "id=a3fWa",
                 123
             ],
-            [ // type error invalid url
+            [
+                // type error invalid url
                 "id=a3fWa",
                 ""
             ],
-            [ // type error invalid url
+            [
+                // type error invalid url
                 "id=a3fWa",
                 "github.com"
             ],
             // TODO: fix this test case, parser shouldn't allow it. it is currently ignored
-            [ // type error invalid url
+            [
+                // type error invalid url
                 "id=a3fWa",
                 "https:abc/abs"
             ],
-            [ // cookie parse error invalid cookie name
+            [
+                // cookie parse error invalid cookie name
                 "",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=Wed, 21 Oct 2015 07:28: GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=Wed, 21 Onv 2015 07:28:00 GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=Wed, 21 Oct 20151 07:28:00 GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=Wed, 32 Oct 2015 07:28:00 GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=Wed, 21 Oct 2015 25:28:00 GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=Wed, 21 Oct 2015 07:61:00 GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=Wed, 21 Oct 2015 07:28:00 UTC; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=Wed, 21 Oct 2015 07:28:00 GMT+2; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=San, 21 Onv 2015 07:28:00 GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Expires=Wed, 31 Dec 1969 07:28:00 GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid value for expires
+            [
+                // cookie parse error invalid value for expires
                 "id=a3fWa; Max-Age=121252a; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid key secur
+            [
+                // cookie parse error invalid key secur
                 "id=a3fWa; Expires=Wed, 21 Oct 2015 07:28:00 GMT; Secur; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error invalid key HttpOly with value 2
+            [
+                // cookie parse error invalid key HttpOly with value 2
                 "id=a3fWa; Expires=Wed, 21 Oct 2015 07:28:00 GMT; Secure; HttpOly=2",
                 "https://github.com"
             ],
-            [ // cookie parse error not set via https
+            [
+                // cookie parse error not set via https
                 "__Secure-id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Secure; HttpOnly",
                 "http://github.com"
             ],
-            [ // cookie parse error secure not set
+            [
+                // cookie parse error secure not set
                 "__Secure-id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error secure not set
+            [
+                // cookie parse error secure not set
                 "__Host-id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; HttpOnly; Path=/",
                 "https://github.com"
             ],
-            [ // cookie parse error not set via https
+            [
+                // cookie parse error not set via https
                 "__Host-id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Secure; HttpOnly; Path=/",
                 "http://github.com"
             ],
-            [ // cookie parse error domain is set
+            [
+                // cookie parse error domain is set
                 "__Host-id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Secure; HttpOnly; Domain=github.com; Path=/",
                 "https://github.com"
             ],
-            [ // cookie parse error path is not set
+            [
+                // cookie parse error path is not set
                 "__Host-id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // cookie parse error path is not equal to /
+            [
+                // cookie parse error path is not equal to /
                 "__Host-id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Secure; HttpOnly; Path=/lel/",
                 "https://github.com"
             ],
-            [ // cookie parse error domain is not a subdomain
+            [
+                // cookie parse error domain is not a subdomain
                 "id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Domain=github.com",
                 "https://gist.github.com"
             ],
-            [ // cookie parse error domain is not a subdomain
+            [
+                // cookie parse error domain is not a subdomain
                 "id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Domain=npmjs.com",
                 "https://gist.github.com"
             ],
-            [ // success
+            [
+                // success
                 "__Secure-id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Secure; HttpOnly",
                 "https://github.com"
             ],
-            [ // success
+            [
+                // success
                 "__Host-id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Secure; HttpOnly; Path=/",
                 "https://github.com"
             ],
-            [ // success
+            [
+                // success
                 "__Host-id=a3fWa; Expires=Wed, 21 Nov 2099 20:28:33 GMT; Secure; HttpOnly; Path=/",
                 "https://github.com"
             ],
-            [ // success
+            [
+                // success
                 "id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Secure; HttpOnly; Path=/lul/; Domain=.usercontent.github.com",
                 "https://github.com"
             ],
-            [ // success
+            [
+                // success
                 "id=a3fWa; Expires=Wed, 21 Nov 2015 07:28:00 GMT; Secure; HttpOnly; SameSite=Strict; Path=/lul/; Domain=usercontent.github.com",
                 "https://github.com"
             ],
-            [ // success max-age takes precendence over expires
+            [
+                // success max-age takes precendence over expires
                 "id=a3fWa; Expires=Thu, 01 Jan 1970 00:00:00 GMT; Max-Age=1000",
                 "https://github.com"
             ],
-            [ // success max-age takes precendence over expires
+            [
-                "id=\"a3fWa\"; Max-Age=1000; Expires=Thu, 01 Jan 1970 00:00:00 GMT",
+                // success max-age takes precendence over expires
+                'id="a3fWa"; Max-Age=1000; Expires=Thu, 01 Jan 1970 00:00:00 GMT',
                 "https://github.com"
-            ],
+            ]
         ];
 
         const catchErrorTest = (input, catchFnc) => {
             try {
                 new Cookie(...input);
                 return false;
-            }
+            } catch (error) {
-            catch(error) {
                 return catchFnc(error);
             }
         };
 
-        const catchErrorTypeMessageTest = (input, type, message) => catchErrorTest(input, e => e instanceof type && e.message === message);
+        const catchErrorTypeMessageTest = (input, type, message) =>
+            catchErrorTest(
+                input,
+                e => e instanceof type && e.message === message
+            );
 
         const compareCookieProps = (input, expiryFnc, properties) => {
             const cookie = new Cookie(...input);
-            return Object.entries(properties).every(([prop, value]) => cookie[prop] === value)
+            return (
-                && expiryFnc(cookie.expiry);
+                Object.entries(properties).every(
+                    ([prop, value]) => cookie[prop] === value
+                ) && expiryFnc(cookie.expiry)
+            );
         };
 
-        return inputs.slice(0, 3).every(input => catchErrorTest(input, e => e instanceof TypeError))
+        return (
-
+            inputs
+                .slice(0, 3)
+                .every(input =>
+                    catchErrorTest(input, e => e instanceof TypeError)
+                ) &&
             // cookies[4] is the test case that is ignored for now
 
-        && catchErrorTypeMessageTest(inputs[5], CookieParseError, "Invalid cookie name \"\"!")
+            catchErrorTypeMessageTest(
-        && catchErrorTypeMessageTest(inputs[6], CookieParseError, "Invalid value for Expires \"Wed, 21 Oct 2015 07:28: GMT\"!")
+                inputs[5],
-        && catchErrorTypeMessageTest(inputs[7], CookieParseError, "Invalid value for Expires \"Wed, 21 Onv 2015 07:28:00 GMT\"!")
+                CookieParseError,
-        && catchErrorTypeMessageTest(inputs[8], CookieParseError, "Invalid value for Expires \"Wed, 21 Oct 20151 07:28:00 GMT\"!")
+                'Invalid cookie name ""!'
-        && catchErrorTypeMessageTest(inputs[9], CookieParseError, "Invalid value for Expires \"Wed, 32 Oct 2015 07:28:00 GMT\"!")
+            ) &&
-        && catchErrorTypeMessageTest(inputs[10], CookieParseError, "Invalid value for Expires \"Wed, 21 Oct 2015 25:28:00 GMT\"!")
+            catchErrorTypeMessageTest(
-        && catchErrorTypeMessageTest(inputs[11], CookieParseError, "Invalid value for Expires \"Wed, 21 Oct 2015 07:61:00 GMT\"!")
+                inputs[6],
-        && catchErrorTypeMessageTest(inputs[12], CookieParseError, "Invalid value for Expires \"Wed, 21 Oct 2015 07:28:00 UTC\"!")
+                CookieParseError,
-        && catchErrorTypeMessageTest(inputs[13], CookieParseError, "Invalid value for Expires \"Wed, 21 Oct 2015 07:28:00 GMT+2\"!")
+                'Invalid value for Expires "Wed, 21 Oct 2015 07:28: GMT"!'
-        && catchErrorTypeMessageTest(inputs[14], CookieParseError, "Invalid value for Expires \"San, 21 Onv 2015 07:28:00 GMT\"!")
+            ) &&
-        && catchErrorTypeMessageTest(inputs[15], CookieParseError, "Invalid value for Expires \"Wed, 31 Dec 1969 07:28:00 GMT\"!")
+            catchErrorTypeMessageTest(
-        && catchErrorTypeMessageTest(inputs[16], CookieParseError, "Invalid value for Max-Age \"121252a\"!")
+                inputs[7],
-        && catchErrorTypeMessageTest(inputs[17], CookieParseError, "Invalid key \"secur\" specified!")
+                CookieParseError,
-        && catchErrorTypeMessageTest(inputs[18], CookieParseError, "Invalid key \"httpoly\" with value \"2\" specified!")
+                'Invalid value for Expires "Wed, 21 Onv 2015 07:28:00 GMT"!'
-
+            ) &&
-        && inputs.slice(19, 21).every(input => catchErrorTypeMessageTest(input, CookieParseError, "Cookie has \"__Secure-\" prefix but \"Secure\" isn't set or the cookie is not set via https!"))
+            catchErrorTypeMessageTest(
-
+                inputs[8],
-        && inputs.slice(21, 26).every(input => catchErrorTypeMessageTest(input, CookieParseError, "Cookie has \"__Host-\" prefix but \"Secure\" isn't set, the cookie is not set via https, \"Domain\" is set or \"Path\" is not equal to \"/\"!"))
+                CookieParseError,
-
+                'Invalid value for Expires "Wed, 21 Oct 20151 07:28:00 GMT"!'
-        && catchErrorTypeMessageTest(inputs[26], CookieParseError, "Invalid value for Domain \"github.com\": cookie was received from \"gist.github.com\"!")
+            ) &&
-        && catchErrorTypeMessageTest(inputs[27], CookieParseError, "Invalid value for Domain \"npmjs.com\": cookie was received from \"gist.github.com\"!")
+            catchErrorTypeMessageTest(
-
+                inputs[9],
-        && compareCookieProps(
+                CookieParseError,
+                'Invalid value for Expires "Wed, 32 Oct 2015 07:28:00 GMT"!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[10],
+                CookieParseError,
+                'Invalid value for Expires "Wed, 21 Oct 2015 25:28:00 GMT"!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[11],
+                CookieParseError,
+                'Invalid value for Expires "Wed, 21 Oct 2015 07:61:00 GMT"!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[12],
+                CookieParseError,
+                'Invalid value for Expires "Wed, 21 Oct 2015 07:28:00 UTC"!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[13],
+                CookieParseError,
+                'Invalid value for Expires "Wed, 21 Oct 2015 07:28:00 GMT+2"!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[14],
+                CookieParseError,
+                'Invalid value for Expires "San, 21 Onv 2015 07:28:00 GMT"!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[15],
+                CookieParseError,
+                'Invalid value for Expires "Wed, 31 Dec 1969 07:28:00 GMT"!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[16],
+                CookieParseError,
+                'Invalid value for Max-Age "121252a"!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[17],
+                CookieParseError,
+                'Invalid key "secur" specified!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[18],
+                CookieParseError,
+                'Invalid key "httpoly" with value "2" specified!'
+            ) &&
+            inputs
+                .slice(19, 21)
+                .every(input =>
+                    catchErrorTypeMessageTest(
+                        input,
+                        CookieParseError,
+                        'Cookie has "__Secure-" prefix but "Secure" isn\'t set or the cookie is not set via https!'
+                    )
+                ) &&
+            inputs
+                .slice(21, 26)
+                .every(input =>
+                    catchErrorTypeMessageTest(
+                        input,
+                        CookieParseError,
+                        'Cookie has "__Host-" prefix but "Secure" isn\'t set, the cookie is not set via https, "Domain" is set or "Path" is not equal to "/"!'
+                    )
+                ) &&
+            catchErrorTypeMessageTest(
+                inputs[26],
+                CookieParseError,
+                'Invalid value for Domain "github.com": cookie was received from "gist.github.com"!'
+            ) &&
+            catchErrorTypeMessageTest(
+                inputs[27],
+                CookieParseError,
+                'Invalid value for Domain "npmjs.com": cookie was received from "gist.github.com"!'
+            ) &&
+            compareCookieProps(
                 inputs[28],
-            exp => exp.getTime() === new Date("Wed, 21 Nov 2015 07:28:00 GMT").getTime(),
+                exp =>
+                    exp.getTime() ===
+                    new Date("Wed, 21 Nov 2015 07:28:00 GMT").getTime(),
                 {
                     name: "__Secure-id",
                     value: "a3fWa",
@@ -202,11 +325,12 @@ export default Test => [
                     subdomains: false,
                     path: "/"
                 }
-        )
+            ) &&
-
+            compareCookieProps(
-        && compareCookieProps(
                 inputs[29],
-            exp => exp.getTime() === new Date("Wed, 21 Nov 2015 07:28:00 GMT").getTime(),
+                exp =>
+                    exp.getTime() ===
+                    new Date("Wed, 21 Nov 2015 07:28:00 GMT").getTime(),
                 {
                     name: "__Host-id",
                     value: "a3fWa",
@@ -215,11 +339,12 @@ export default Test => [
                     subdomains: false,
                     path: "/"
                 }
-        )
+            ) &&
-
+            compareCookieProps(
-        && compareCookieProps(
                 inputs[30],
-            exp => exp.getTime() === new Date("Wed, 21 Nov 2099 20:28:33 GMT").getTime(),
+                exp =>
+                    exp.getTime() ===
+                    new Date("Wed, 21 Nov 2099 20:28:33 GMT").getTime(),
                 {
                     name: "__Host-id",
                     value: "a3fWa",
@@ -228,11 +353,12 @@ export default Test => [
                     subdomains: false,
                     path: "/"
                 }
-        )
+            ) &&
-
+            compareCookieProps(
-        && compareCookieProps(
                 inputs[31],
-            exp => exp.getTime() === new Date("Wed, 21 Nov 2015 07:28:00 GMT").getTime(),
+                exp =>
+                    exp.getTime() ===
+                    new Date("Wed, 21 Nov 2015 07:28:00 GMT").getTime(),
                 {
                     name: "id",
                     value: "a3fWa",
@@ -241,11 +367,12 @@ export default Test => [
                     subdomains: true,
                     path: "/lul/"
                 }
-        )
+            ) &&
-
+            compareCookieProps(
-        && compareCookieProps(
                 inputs[32],
-            exp => exp.getTime() === new Date("Wed, 21 Nov 2015 07:28:00 GMT").getTime(),
+                exp =>
+                    exp.getTime() ===
+                    new Date("Wed, 21 Nov 2015 07:28:00 GMT").getTime(),
                 {
                     name: "id",
                     value: "a3fWa",
@@ -254,11 +381,26 @@ export default Test => [
                     subdomains: true,
                     path: "/lul/"
                 }
-        )
+            ) &&
-
+            compareCookieProps(
-        && compareCookieProps(
                 inputs[33],
-            exp => exp.getTime() > new Date("Thu, 01 Jan 1970 00:00:00 GMT").getTime(),
+                exp =>
+                    exp.getTime() >
+                    new Date("Thu, 01 Jan 1970 00:00:00 GMT").getTime(),
+                {
+                    name: "id",
+                    value: "a3fWa",
+                    secure: false,
+                    domain: "github.com",
+                    subdomains: false,
+                    path: "/"
+                }
+            ) &&
+            compareCookieProps(
+                inputs[34],
+                exp =>
+                    exp.getTime() >
+                    new Date("Thu, 01 Jan 1970 00:00:00 GMT").getTime(),
                 {
                     name: "id",
                     value: "a3fWa",
@@ -268,18 +410,6 @@ export default Test => [
                     path: "/"
                 }
             )
-
-        && compareCookieProps(
-            inputs[34],
-            exp => exp.getTime() > new Date("Thu, 01 Jan 1970 00:00:00 GMT").getTime(),
-            {
-                name: "id",
-                value: "a3fWa",
-                secure: false,
-                domain: "github.com",
-                subdomains: false,
-                path: "/"
-            }
         );
     }),
     new Test("static Cookie.fromObject()", () => {
@@ -307,24 +437,34 @@ export default Test => [
 
         const cookies = inputs.map(i => Cookie.fromObject(i));
 
-        return cookies[0].name === "testname"
+        return (
-            && cookies[0].value === "somevalue"
+            cookies[0].name === "testname" &&
-            && cookies[0].domain === "github.com"
+            cookies[0].value === "somevalue" &&
-            && cookies[0].path === "/"
+            cookies[0].domain === "github.com" &&
-            && cookies[0].expiry.getTime() === new Date(inputs[0].expiry).getTime()
+            cookies[0].path === "/" &&
-            && cookies[0].secure === false
+            cookies[0].expiry.getTime() ===
-            && cookies[0].subdomains === false
+                new Date(inputs[0].expiry).getTime() &&
-
+            cookies[0].secure === false &&
-            && cookies[1].name === "testname"
+            cookies[0].subdomains === false &&
-            && cookies[1].value === "lul"
+            cookies[1].name === "testname" &&
-            && cookies[1].domain === "somedomain.tld"
+            cookies[1].value === "lul" &&
-            && cookies[1].path === "/lel/"
+            cookies[1].domain === "somedomain.tld" &&
-            && cookies[1].expiry.getTime() === date.getTime()
+            cookies[1].path === "/lel/" &&
-            && cookies[1].secure === true
+            cookies[1].expiry.getTime() === date.getTime() &&
-            && cookies[1].subdomains === true;
+            cookies[1].secure === true &&
+            cookies[1].subdomains === true
+        );
     }),
     new Test("Cookie.serialize()", () => {
-        return new Cookie("abc=def; Expires=Wed, 20 Oct 2018 08:08:08 GMT; Path=/", "https://somedomain.tld").serialize() === "abc=def"
+        return (
-            && new Cookie("jkhsd231=ajkshdgi", "https://somedomain.tld").serialize() === "jkhsd231=ajkshdgi";
+            new Cookie(
+                "abc=def; Expires=Wed, 20 Oct 2018 08:08:08 GMT; Path=/",
+                "https://somedomain.tld"
+            ).serialize() === "abc=def" &&
+            new Cookie(
+                "jkhsd231=ajkshdgi",
+                "https://somedomain.tld"
+            ).serialize() === "jkhsd231=ajkshdgi"
+        );
     })
 ];

test/errors.mjs

@@ -8,20 +8,32 @@ export default Test => [
         const validTypes = ["lol", "lel", "lul", "lal"];
         const errors = [
             paramError(position, paramName, functionName, validTypes[0]),
-            paramError(position, paramName, functionName, validTypes.slice(0, 2)),
+            paramError(
+                position,
+                paramName,
+                functionName,
+                validTypes.slice(0, 2)
+            ),
             paramError(position, paramName, functionName, validTypes)
         ];
-        return errors.every(e => e instanceof TypeError)
+        return (
-            && errors.every(e => e.name === "TypeError")
+            errors.every(e => e instanceof TypeError) &&
-            && errors[0].message === "something parameter \"some_param\" passed to \"some_func\" is not of type \"lol\"!"
+            errors.every(e => e.name === "TypeError") &&
-            && errors[1].message === "something parameter \"some_param\" passed to \"some_func\" is not of type \"lol\" or \"lel\"!"
+            errors[0].message ===
-            && errors[2].message === "something parameter \"some_param\" passed to \"some_func\" is not of type \"lol\", \"lel\", \"lul\" or \"lal\"!";
+                'something parameter "some_param" passed to "some_func" is not of type "lol"!' &&
+            errors[1].message ===
+                'something parameter "some_param" passed to "some_func" is not of type "lol" or "lel"!' &&
+            errors[2].message ===
+                'something parameter "some_param" passed to "some_func" is not of type "lol", "lel", "lul" or "lal"!'
+        );
     }),
     new Test("class CookieParseError", () => {
         const message = "this is a test error";
         const error = new CookieParseError(message);
-        return error instanceof CookieParseError
+        return (
-            && error.name === "CookieParseError"
+            error instanceof CookieParseError &&
-            && error.message === message;
+            error.name === "CookieParseError" &&
+            error.message === message
+        );
     })
 ];

test/index.mjs

@@ -3,43 +3,51 @@ import errors from "./errors.mjs";
 
 class Test {
     constructor(name, fnc) {
-        this.name = name
+        this.name = name;
-        this.fnc = fnc
+        this.fnc = fnc;
     }
     async runTest() {
         return this.fnc();
     }
 }
 
-const tests = [
+const tests = [cookie, errors].flatMap(t => t(Test));
-    cookie,
-    errors
-].flatMap(t => t(Test));
 
 (async () => {
     console.log("running tests...");
-    const testResults = await Promise.all(tests.map(async t => {
+    const testResults = await Promise.all(
+        tests.map(async t => {
             try {
                 t.result = await t.runTest();
                 if (t.result !== !!t.result) {
                     t.result = false;
                     console.error("test did not return a boolean: " + t.name);
                 }
-        }
+            } catch (error) {
-        catch(error) {
+                console.error(
-            console.error("uncaught error in test: " + t.name + "\n", error);
+                    "uncaught error in test: " + t.name + "\n",
+                    error
+                );
                 t.result = false;
             }
             return t;
-    }));
+        })
+    );
     testResults.forEach(t => {
-        if(t.result)
+        if (t.result) console.info("✔ " + t.name);
-            console.info("✔ " + t.name);
+        else console.warn("✘ " + t.name);
-        else
-            console.warn("✘ " + t.name);
     });
-    const succeededTests = testResults.map(t => t.result).reduce((a, b) => a + b);
+    const succeededTests = testResults
+        .map(t => t.result)
+        .reduce((a, b) => a + b);
     const success = succeededTests === testResults.length;
-    (success ? console.info : console.warn)((success ? "✔" : "✘") + " " + succeededTests + "/" + testResults.length + " tests successful");
+    (success ? console.info : console.warn)(
+        (success ? "✔" : "✘") +
+            " " +
+            succeededTests +
+            "/" +
+            testResults.length +
+            " tests successful"
+    );
     !success && process.exit(1);
 })();