Add "new conversation" composer for direct messages

ts/test-node/components/leftPane/LeftPaneComposeHelper_test.ts

@@ -0,0 +1,144 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { assert } from 'chai';
+import { v4 as uuid } from 'uuid';
+import { RowType } from '../../../components/ConversationList';
+import { FindDirection } from '../../../components/leftPane/LeftPaneHelper';
+
+import { LeftPaneComposeHelper } from '../../../components/leftPane/LeftPaneComposeHelper';
+
+describe('LeftPaneComposeHelper', () => {
+  const fakeContact = () => ({
+    id: uuid(),
+    title: uuid(),
+    type: 'direct' as const,
+  });
+
+  describe('getRowCount', () => {
+    it('returns the number of contacts if not searching for a phone number', () => {
+      assert.strictEqual(
+        new LeftPaneComposeHelper({
+          composeContacts: [],
+          regionCode: 'US',
+          searchTerm: 'foo bar',
+        }).getRowCount(),
+        0
+      );
+      assert.strictEqual(
+        new LeftPaneComposeHelper({
+          composeContacts: [fakeContact(), fakeContact()],
+          regionCode: 'US',
+          searchTerm: '',
+        }).getRowCount(),
+        2
+      );
+    });
+
+    it('returns the number of contacts + 1 if searching for a phone number', () => {
+      assert.strictEqual(
+        new LeftPaneComposeHelper({
+          composeContacts: [fakeContact(), fakeContact()],
+          regionCode: 'US',
+          searchTerm: '+16505551234',
+        }).getRowCount(),
+        3
+      );
+    });
+  });
+
+  describe('getRow', () => {
+    it('returns each contact as a row if not searching for a phone number', () => {
+      const composeContacts = [fakeContact(), fakeContact()];
+      const helper = new LeftPaneComposeHelper({
+        composeContacts,
+        regionCode: 'US',
+        searchTerm: '',
+      });
+
+      assert.deepEqual(helper.getRow(0), {
+        type: RowType.Contact,
+        contact: composeContacts[0],
+      });
+      assert.deepEqual(helper.getRow(1), {
+        type: RowType.Contact,
+        contact: composeContacts[1],
+      });
+    });
+
+    it('returns a "start new conversation" row if searching for a phone number', () => {
+      const composeContacts = [fakeContact(), fakeContact()];
+      const helper = new LeftPaneComposeHelper({
+        composeContacts,
+        regionCode: 'US',
+        searchTerm: '+16505551234',
+      });
+
+      assert.deepEqual(helper.getRow(0), {
+        type: RowType.StartNewConversation,
+        phoneNumber: '+16505551234',
+      });
+      assert.deepEqual(helper.getRow(1), {
+        type: RowType.Contact,
+        contact: composeContacts[0],
+      });
+      assert.deepEqual(helper.getRow(2), {
+        type: RowType.Contact,
+        contact: composeContacts[1],
+      });
+    });
+  });
+
+  describe('getConversationAndMessageAtIndex', () => {
+    it('returns undefined because keyboard shortcuts are not supported', () => {
+      const helper = new LeftPaneComposeHelper({
+        composeContacts: [fakeContact(), fakeContact()],
+        regionCode: 'US',
+        searchTerm: 'foo bar',
+      });
+
+      assert.isUndefined(helper.getConversationAndMessageAtIndex(0));
+    });
+  });
+
+  describe('getConversationAndMessageInDirection', () => {
+    it('returns undefined because keyboard shortcuts are not supported', () => {
+      const helper = new LeftPaneComposeHelper({
+        composeContacts: [fakeContact(), fakeContact()],
+        regionCode: 'US',
+        searchTerm: 'foo bar',
+      });
+
+      assert.isUndefined(
+        helper.getConversationAndMessageInDirection(
+          { direction: FindDirection.Down, unreadOnly: false },
+          undefined,
+          undefined
+        )
+      );
+    });
+  });
+
+  describe('shouldRecomputeRowHeights', () => {
+    it('always returns false because row heights are constant', () => {
+      const helper = new LeftPaneComposeHelper({
+        composeContacts: [fakeContact(), fakeContact()],
+        regionCode: 'US',
+        searchTerm: 'foo bar',
+      });
+
+      assert.isFalse(
+        helper.shouldRecomputeRowHeights({
+          composeContacts: [fakeContact()],
+          searchTerm: 'foo bar',
+        })
+      );
+      assert.isFalse(
+        helper.shouldRecomputeRowHeights({
+          composeContacts: [fakeContact(), fakeContact(), fakeContact()],
+          searchTerm: '',
+        })
+      );
+    });
+  });
+});