Reorganize test cases

ts/test-node/util/getMutedUntilText_test.ts

@@ -0,0 +1,48 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { assert } from 'chai';
+import * as sinon from 'sinon';
+import { setupI18n } from '../../util/setupI18n';
+import enMessages from '../../../_locales/en/messages.json';
+
+import { getMutedUntilText } from '../../util/getMutedUntilText';
+
+describe('getMutedUntilText', () => {
+  const i18n = setupI18n('en', enMessages);
+
+  let sandbox: sinon.SinonSandbox;
+
+  beforeEach(() => {
+    sandbox = sinon.createSandbox();
+    sandbox.useFakeTimers({
+      now: new Date(2000, 3, 20, 12, 0, 0),
+    });
+  });
+
+  afterEach(() => {
+    sandbox.restore();
+  });
+
+  it('returns an "always" label if passed a large number', () => {
+    assert.strictEqual(
+      getMutedUntilText(Number.MAX_SAFE_INTEGER, i18n),
+      'Muted always'
+    );
+    assert.strictEqual(getMutedUntilText(Infinity, i18n), 'Muted always');
+  });
+
+  it('returns the time if the mute expires later today', () => {
+    assert.strictEqual(
+      getMutedUntilText(new Date(2000, 3, 20, 18, 30, 0).valueOf(), i18n),
+      'Muted until 6:30 PM'
+    );
+  });
+
+  it('returns the date and time if the mute expires on another day', () => {
+    assert.strictEqual(
+      getMutedUntilText(new Date(2000, 3, 21, 18, 30, 0).valueOf(), i18n),
+      'Muted until 04/21/2000, 6:30 PM'
+    );
+  });
+});