Fix eraseCookies domain bug and expand tests

docs/reference/api-reference.md

@@ -269,20 +269,28 @@ Removes one or multiple cookies.
     ): void
     ```
 
-- **Examples** <br>
+- **Details**
 
-    Delete the plugin's own cookie
+    This function uses `document.cookie` to expire cookies.
+    According to the [MDN Web Docs](https://developer.mozilla.org/en-US/docs/Web/API/Document/cookie#write_a_new_cookie):
+    "The domain _must_ match the domain of the JavaScript origin. Setting cookies to foreign domains will be silently ignored."
+
+- **Examples**
 
+    Delete the plugin's own cookie:
     ```javascript
     CookieConsent.eraseCookies('cc_cookie');
     ```
 
     Delete the `_gid` and all cookies starting with `_ga`:
     ```javascript
-    CookieConsent.eraseCookies(['_gid', /^_ga/], '/', location.hostname);
+    CookieConsent.eraseCookies(['_gid', /^_ga/]);
     ```
 
-
+    Delete all cookies except the plugin's own cookie:
+    ```javascript
+    CookieConsent.eraseCookies(/^(?!cc_cookie$)/);
+    ```
 
 ## loadScript
 

src/utils/cookies.js

@@ -315,21 +315,24 @@ export const eraseCookiesHelper = (cookies, customPath, customDomain) => {
      * @param {string} [domain]
      */
     const erase = (cookie, domain) => {
+        if (domain && domain.slice(0, 1) !== '.')
+            domain = '.' + domain;
         document.cookie = cookie + '='
             + '; path=' + path
-            + (domain ? '; domain=.' + domain : '')
+            + (domain ? '; domain=' + domain : '')
             + '; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
     };
 
     for (const cookieName of cookies) {
+        erase(cookieName, customDomain);
 
         /**
-         * 2 attempts to erase the cookie:
-         * - without domain
-         * - with domain
+         * If custom domain not specified,
+         * also erase config domain
          */
-        erase(cookieName);
-        erase(cookieName, domain);
+        if (!customDomain) {
+            erase(cookieName, domain);
+        }
 
         /**
          * If domain starts with 'www.',

tests/api.test.js

@@ -155,13 +155,16 @@ describe("API tests", () => {
 
     it('Should erase cookie by string', () => {
         document.cookie = 'test_cookie=21; expires=Sun, 1 Jan 2063 00:00:00 UTC; path=/';
+        expect(api.validCookie('test_cookie')).toBe(true);
         api.eraseCookies('test_cookie');
         expect(api.validCookie('test_cookie')).toBe(false);
     })
 
     it('Should erase cookie by regex', () => {
         document.cookie = 'test_cookie1=21; expires=Sun, 1 Jan 2063 00:00:00 UTC; path=/';
         document.cookie = 'test_cookie2=21; expires=Sun, 1 Jan 2063 00:00:00 UTC; path=/';
+        expect(api.validCookie('test_cookie1')).toBe(true);
+        expect(api.validCookie('test_cookie2')).toBe(true);
         api.eraseCookies(/^test_cookie/);
         expect(api.validCookie('test_cookie1')).toBe(false);
         expect(api.validCookie('test_cookie2')).toBe(false);
@@ -171,18 +174,36 @@ describe("API tests", () => {
         document.cookie = 'test_cookie1=21; expires=Sun, 1 Jan 2063 00:00:00 UTC; path=/';
         document.cookie = 'test_cookie2=21; expires=Sun, 1 Jan 2063 00:00:00 UTC; path=/';
         document.cookie = 'new_cookie=21; expires=Sun, 1 Jan 2063 00:00:00 UTC; path=/';
+        expect(api.validCookie('test_cookie1')).toBe(true);
+        expect(api.validCookie('test_cookie2')).toBe(true);
+        expect(api.validCookie('new_cookie')).toBe(true);
         api.eraseCookies([/^test_cookie/, 'new_cookie']);
         expect(api.validCookie('test_cookie1')).toBe(false);
         expect(api.validCookie('test_cookie2')).toBe(false);
         expect(api.validCookie('new_cookie')).toBe(false);
     })
 
     it('Should erase cookie with specific path and domain', () => {
-        document.cookie = 'test_cookie5=21; expires=Sun, 1 Jan 2063 00:00:00 UTC; path=/ciao; domain='+location.host;
+        document.cookie = 'test_cookie5=21; expires=Sun, 1 Jan 2063 00:00:00 UTC; path=/; domain='+location.host;
+        expect(api.validCookie('test_cookie5')).toBe(true);
         api.eraseCookies('test_cookie5', '/', location.host);
         expect(api.validCookie('test_cookie5')).toBe(false);
     });
 
+    it('Should not erase cookie with wrong path', () => {
+        document.cookie = 'test_cookie6=28; expires=Mon, 1 Jan 2064 00:00:00 UTC; path=/; domain='+location.host;
+        expect(api.validCookie('test_cookie6')).toBe(true);
+        api.eraseCookies('test_cookie6', '/other', location.host);
+        expect(api.validCookie('test_cookie6')).toBe(true);
+    });
+
+    it('Should not erase cookie with wrong domain', () => {
+        document.cookie = 'test_cookie7=35; expires=Wed, 1 Jan 2065 00:00:00 UTC; path=/; domain='+location.host;
+        expect(api.validCookie('test_cookie7')).toBe(true);
+        api.eraseCookies('test_cookie7', '/', 'wrong.domain');
+        expect(api.validCookie('test_cookie7')).toBe(true);
+    });
+
     it('Should show the consent modal', async () => {
         api.reset(true);
         testConfig.autoShow = false;

tests/cookies.test.js

@@ -40,11 +40,16 @@ describe("Cookie should be created successfully", () => {
         });
     });
 
-    it('Should erase cookie', () => {
-        setCookie('test_cookie', '{"ciao": 21}');
-        eraseCookiesHelper(['test_cookie'], '/', [location.host]);
-        const ccCookie = getSingleCookie('test_cookie');
-        expect(ccCookie).toBeFalsy();
+    it('Should erase cookies', () => {
+        const name1 = 'test_cookie1';
+        const name2 = 'test_cookie2';
+        setCookie(name1, '{"ciao": 11}');
+        setCookie(name2, '{"aloha": 22}');
+        expect(getSingleCookie(name1)).toBeTruthy();
+        expect(getSingleCookie(name2)).toBeTruthy();
+        eraseCookiesHelper([name1, name2]);
+        expect(getSingleCookie(name1)).toBeFalsy();
+        expect(getSingleCookie(name2)).toBeFalsy();
     });
 
     it('Should set the cookie', () => {