PLT-5755: Infrastructure for Component Testing. (#5814)

This migrates the existing webapp tests to using Jest and Enzyme. The
infrastructure is put in place for React component testing, and a few
simple example component tests are implemented.

This also adds snapshot testing of components, coverage checking for the
webapp (although that is not yet integrated to Coveralls), and the
ability to run npm run test:watch to automatically re-run affected tests
when working on the webapp codebase.

1 files changed, 79 insertions, 0 deletions

diff --git a/webapp/tests/utils/formatting_at_mentions.test.jsx b/webapp/tests/utils/formatting_at_mentions.test.jsx
new file mode 100644
index 000000000..1216134f2
--- /dev/null
+++ b/webapp/tests/utils/formatting_at_mentions.test.jsx
@@ -0,0 +1,79 @@
+// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import assert from 'assert';
+
+import * as TextFormatting from 'utils/text_formatting.jsx';
+
+describe('TextFormatting.AtMentions', function() {
+    it('At mentions', function() {
+        assert.equal(
+            TextFormatting.autolinkAtMentions('@user', new Map(), {user: {}}),
+            '$MM_ATMENTION0',
+            'should replace explicit mention with token'
+        );
+
+        assert.equal(
+            TextFormatting.autolinkAtMentions('abc"@user"def', new Map(), {user: {}}),
+            'abc"$MM_ATMENTION0"def',
+            'should replace explicit mention surrounded by punctuation with token'
+        );
+
+        assert.equal(
+            TextFormatting.autolinkAtMentions('@user1 @user2', new Map(), {user1: {}, user2: {}}),
+            '$MM_ATMENTION0 $MM_ATMENTION1',
+            'should replace multiple explicit mentions with tokens'
+        );
+
+        assert.equal(
+            TextFormatting.autolinkAtMentions('@us_-e.r', new Map(), {'us_-e.r': {}}),
+            '$MM_ATMENTION0',
+            'should replace multiple explicit mentions containing punctuation with token'
+        );
+
+        assert.equal(
+            TextFormatting.autolinkAtMentions('@us_-e.r', new Map(), {'us_-e.r': {}}),
+            '$MM_ATMENTION0',
+            'should replace multiple explicit mentions containing valid punctuation with token'
+        );
+
+        assert.equal(
+            TextFormatting.autolinkAtMentions('@user.', new Map(), {user: {}}),
+            '$MM_ATMENTION0.',
+            'should replace explicit mention followed by period with token'
+        );
+
+        assert.equal(
+            TextFormatting.autolinkAtMentions('@user.', new Map(), {'user.': {}}),
+            '$MM_ATMENTION0',
+            'should replace explicit mention ending with period with token'
+        );
+    });
+
+    it('Implied at mentions', function() {
+        // PLT-4454 Assume users exist for things that look like at mentions until we support the new mention syntax
+        assert.equal(
+            TextFormatting.autolinkAtMentions('@user', new Map(), {}),
+            '$MM_ATMENTION0',
+            'should imply user exists and replace mention with token'
+        );
+
+        assert.equal(
+            TextFormatting.autolinkAtMentions('@user.', new Map(), {}),
+            '$MM_ATMENTION0.',
+            'should assume username doesn\'t end in punctuation'
+        );
+    });
+
+    it('Not at mentions', function() {
+        assert.equal(
+            TextFormatting.autolinkAtMentions('user@host', new Map(), {user: {}, host: {}}),
+            'user@host'
+        );
+
+        assert.equal(
+            TextFormatting.autolinkAtMentions('user@email.com', new Map(), {user: {}, email: {}}),
+            'user@email.com'
+        );
+    });
+});