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diff --git a/spec/javascripts/lib/utils/common_utils_spec.js.es6 b/spec/javascripts/lib/utils/common_utils_spec.js.es6
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+++ b/spec/javascripts/lib/utils/common_utils_spec.js.es6
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+//= require lib/utils/common_utils
+
+(() => {
+  describe('common_utils', () => {
+    describe('gl.utils.parseUrl', () => {
+      it('returns an anchor tag with url', () => {
+        expect(gl.utils.parseUrl('/some/absolute/url').pathname).toContain('some/absolute/url');
+      });
+      it('url is escaped', () => {
+        // IE11 will return a relative pathname while other browsers will return a full pathname.
+        // parseUrl uses an anchor element for parsing an url. With relative urls, the anchor
+        // element will create an absolute url relative to the current execution context.
+        // The JavaScript test suite is executed at '/teaspoon' which will lead to an absolute
+        // url starting with '/teaspoon'.
+        expect(gl.utils.parseUrl('" test="asf"').pathname).toEqual('/teaspoon/%22%20test=%22asf%22');
+      });
+    });
+    describe('gl.utils.parseUrlPathname', () => {
+      beforeEach(() => {
+        spyOn(gl.utils, 'parseUrl').and.callFake(url => ({
+          pathname: url,
+        }));
+      });
+      it('returns an absolute url when given an absolute url', () => {
+        expect(gl.utils.parseUrlPathname('/some/absolute/url')).toEqual('/some/absolute/url');
+      });
+      it('returns an absolute url when given a relative url', () => {
+        expect(gl.utils.parseUrlPathname('some/relative/url')).toEqual('/some/relative/url');
+      });
+    });
+  });
+})();