test: add tests for UserListViewThemeData

packages/stream_chat_flutter/test/src/user_list_view_theme_test.dart

@@ -0,0 +1,114 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:stream_chat_flutter/stream_chat_flutter.dart';
+
+import 'mocks.dart';
+
+void main() {
+  test('UserListViewThemeData copyWith, ==, hashCode basics', () {
+    expect(const UserListViewThemeData(),
+        const UserListViewThemeData().copyWith());
+  });
+
+  test(
+      '''Light UserListViewThemeData lerps completely to dark UserListViewThemeData''',
+      () {
+    expect(
+        const UserListViewThemeData().lerp(_userListViewThemeDataControl,
+            _userListViewThemeDataControlDark, 1),
+        _userListViewThemeDataControlDark);
+  });
+
+  test(
+      '''Light UserListViewThemeData lerps halfway to dark UserListViewThemeData''',
+      () {
+    expect(
+        const UserListViewThemeData().lerp(_userListViewThemeDataControl,
+            _userListViewThemeDataControlDark, 0.5),
+        _userListViewThemeDataControlHalfLerp);
+  });
+
+  test(
+      '''Dark UserListViewThemeData lerps completely to light UserListViewThemeData''',
+      () {
+    expect(
+        const UserListViewThemeData().lerp(_userListViewThemeDataControlDark,
+            _userListViewThemeDataControl, 1),
+        _userListViewThemeDataControl);
+  });
+
+  test('Merging dark and light themes results in a dark theme', () {
+    expect(
+        _userListViewThemeDataControl.merge(_userListViewThemeDataControlDark),
+        _userListViewThemeDataControlDark);
+  });
+
+  testWidgets(
+      'Passing no ChannelListViewThemeData returns default light theme values',
+      (WidgetTester tester) async {
+    late BuildContext _context;
+    await tester.pumpWidget(
+      MaterialApp(
+        builder: (context, child) => StreamChat(
+          client: MockClient(),
+          child: child,
+        ),
+        home: Builder(
+          builder: (BuildContext context) {
+            _context = context;
+            return const Scaffold(
+              body: UsersBloc(
+                child: UserListView(),
+              ),
+            );
+          },
+        ),
+      ),
+    );
+
+    final userListViewTheme = UserListViewTheme.of(_context);
+    expect(userListViewTheme.backgroundColor,
+        _userListViewThemeDataControl.backgroundColor);
+  });
+
+  testWidgets(
+      'Passing no ChannelListViewThemeData returns default dark theme values',
+          (WidgetTester tester) async {
+        late BuildContext _context;
+        await tester.pumpWidget(
+          MaterialApp(
+            builder: (context, child) => StreamChat(
+              client: MockClient(),
+              streamChatThemeData: StreamChatThemeData.dark(),
+              child: child,
+            ),
+            home: Builder(
+              builder: (BuildContext context) {
+                _context = context;
+                return const Scaffold(
+                  body: UsersBloc(
+                    child: UserListView(),
+                  ),
+                );
+              },
+            ),
+          ),
+        );
+
+        final userListViewTheme = UserListViewTheme.of(_context);
+        expect(userListViewTheme.backgroundColor,
+            _userListViewThemeDataControlDark.backgroundColor);
+      });
+}
+
+final _userListViewThemeDataControl = UserListViewThemeData(
+  backgroundColor: ColorTheme.light().appBg,
+);
+
+const _userListViewThemeDataControlHalfLerp = UserListViewThemeData(
+  backgroundColor: Color(0xff818384),
+);
+
+final _userListViewThemeDataControlDark = UserListViewThemeData(
+  backgroundColor: ColorTheme.dark().appBg,
+);