Merge branch 'add-element-extensions-tests' into 'master'

Added element extensions spec for .matches and .closest ## What does this MR do? Adds tests for `Element.prototype.matches` and `Element.prototype.closest`. ## Are there points in the code the reviewer needs to double check? ## Why was this MR needed? ## Screenshots (if relevant) ## Does this MR meet the acceptance criteria? - [ ] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added - [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md) - [ ] API support added - Tests - [ ] Added for this feature/bug - [ ] All builds are passing - [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html) - [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides) - [ ] Branch has no merge conflicts with `master` (if it does - rebase it please) - [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits) ## What are the relevant issue numbers? See merge request !7755

Merge branch 'add-element-extensions-tests' into 'master'
b61d0586 · Alfredo Sumaran · 5fedc463 · 63e2d652 · b61d0586
Commit b61d0586 authored Dec 05, 2016 by Alfredo Sumaran
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element_spec.js.es6 spec/javascripts/extensions/element_spec.js.es6 +38 -0

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--- a/spec/javascripts/extensions/element_spec.js.es6
+++ b/spec/javascripts/extensions/element_spec.js.es6
+/*= require extensions/element */
+
+(() => {
+  describe('Element extensions', function () {
+    beforeEach(() => {
+      this.element = document.createElement('ul');
+    });
+
+    describe('matches', () => {
+      it('returns true if element matches the selector', () => {
+        expect(this.element.matches('ul')).toBeTruthy();
+      });
+
+      it("returns false if element doesn't match the selector", () => {
+        expect(this.element.matches('.not-an-element')).toBeFalsy();
+      });
+    });
+
+    describe('closest', () => {
+      beforeEach(() => {
+        this.childElement = document.createElement('li');
+        this.element.appendChild(this.childElement);
+      });
+
+      it('returns the closest parent that matches the selector', () => {
+        expect(this.childElement.closest('ul').toString()).toBe(this.element.toString());
+      });
+
+      it('returns itself if it matches the selector', () => {
+        expect(this.childElement.closest('li').toString()).toBe(this.childElement.toString());
+      });
+
+      it('returns undefined if nothing matches the selector', () => {
+        expect(this.childElement.closest('.no-an-element')).toBeFalsy();
+      });
+    });
+  });
+})();