test: lerp halfway from light to dark

packages/stream_chat_flutter/test/src/theme/message_input_theme_test.dart

@@ -18,6 +18,13 @@ void main() {
           _messageInputThemeControlDark);
     });
 
+    test('Lerp halfway from light to dark', () {
+      expect(
+          const MessageInputThemeData().lerp(
+              _messageInputThemeControl, _messageInputThemeControlDark, 0.5),
+          _messageInputThemeControlMidLerp);
+    });
+
     test('Lerp completely from dark to light', () {
       expect(
           const MessageInputThemeData().lerp(
@@ -56,23 +63,29 @@ final _messageInputThemeControl = MessageInputThemeData(
 final _messageInputThemeControlMidLerp = MessageInputThemeData(
   borderRadius: BorderRadius.circular(20),
   sendAnimationDuration: const Duration(milliseconds: 300),
-  actionButtonColor: ColorTheme.light().accentPrimary,
-  actionButtonIdleColor: ColorTheme.light().textLowEmphasis,
-  expandButtonColor: ColorTheme.light().accentPrimary,
-  sendButtonColor: ColorTheme.light().accentPrimary,
-  sendButtonIdleColor: ColorTheme.light().disabled,
-  inputBackgroundColor: ColorTheme.light().barsBg,
-  inputTextStyle: TextTheme.light().body,
-  idleBorderGradient: LinearGradient(
+  inputBackgroundColor: const Color(0xff87898b),
+  actionButtonColor: const Color(0xff005fff),
+  actionButtonIdleColor: const Color(0xff7a7a7a),
+  sendButtonColor: const Color(0xff005fff),
+  sendButtonIdleColor: const Color(0xff848585),
+  expandButtonColor: const Color(0xff005fff),
+  inputTextStyle: const TextStyle(
+    color: Color(0xff7f7f7f),
+    fontSize: 14,
+    fontWeight: FontWeight.w500,
+  ),
+  idleBorderGradient: const LinearGradient(
+    stops: [0.0, 1.0],
     colors: [
-      ColorTheme.light().disabled,
-      ColorTheme.light().disabled,
+      Color(0xff848585),
+      Color(0xff848585),
     ],
   ),
-  activeBorderGradient: LinearGradient(
+  activeBorderGradient: const LinearGradient(
+    stops: [0.0, 1.0],
     colors: [
-      ColorTheme.light().disabled,
-      ColorTheme.light().disabled,
+      Color(0xff848585),
+      Color(0xff848585),
     ],
   ),
 );