Added fixture path utility to e2e-framework

- Always want to be able to safely get a fixture path without needing the path util
- Means tests can be moved around more easily

test/regression/api/admin/authentication.test.js

@@ -42,7 +42,7 @@ describe('Authentication API', function () {
             const requestMock = nock('https://api.github.com')
                 .get('/repos/tryghost/dawn/zipball')
                 .query(true)
-                .replyWithFile(200, __dirname + '/../../../utils/fixtures/themes/valid.zip');
+                .replyWithFile(200, fixtureManager.getPathForFixture('themes/valid.zip'));
 
             await agent
                 .post('authentication/setup')
@@ -166,7 +166,7 @@ describe('Authentication API', function () {
             const requestMock = nock('https://api.github.com')
                 .get('/repos/tryghost/casper/zipball')
                 .query(true)
-                .replyWithFile(200, __dirname + '/../../../utils/fixtures/themes/valid.zip');
+                .replyWithFile(200, fixtureManager.getPathForFixture('themes/valid.zip'));
 
             await cleanAgent
                 .post('authentication/setup')

test/utils/e2e-framework.js

@@ -271,7 +271,10 @@ module.exports = {
         get: getFixture,
         getCurrentOwnerUser: fixtureUtils.getCurrentOwnerUser,
         init: initFixtures,
-        restore: resetData
+        restore: resetData,
+        getPathForFixture: (fixturePath) => {
+            return path.join(__dirname, 'fixtures', fixturePath);
+        }
     },
     matchers: {
         anyString: any(String),