From 5670d99d06fcfa60bb83c635384df479908d020e Mon Sep 17 00:00:00 2001
From: Daniel Molnar <77627178+danielmolnar@users.noreply.github.com>
Date: Thu, 18 Jan 2024 16:29:06 +0100
Subject: [PATCH] Add has effective text style (#37)

---
 lib/src/spot/effective/effective_text.dart | 11 +++++
 test/widgets/effective_text_test.dart      | 51 ++++++++++++++++++++++
 2 files changed, 62 insertions(+)

diff --git a/lib/src/spot/effective/effective_text.dart b/lib/src/spot/effective/effective_text.dart
index 7d146fe4..93cac119 100644
--- a/lib/src/spot/effective/effective_text.dart
+++ b/lib/src/spot/effective/effective_text.dart
@@ -39,6 +39,17 @@ extension EffectiveTextMatcher on WidgetMatcher<Text> {
       match: match.hideNullability(),
     );
   }
+
+  /// Matches the style of a [Text] against a given [TextStyle].
+  WidgetMatcher<Text> hasEffectiveTextStyle(TextStyle? value) {
+    return hasEffectiveTextStyleWhere((it) {
+      if (value == null) {
+        it.isNull();
+      } else {
+        it.equals(value);
+      }
+    });
+  }
 }
 
 extension TextStyleSubject on Subject<TextStyle> {
diff --git a/test/widgets/effective_text_test.dart b/test/widgets/effective_text_test.dart
index 427ff3bf..a26cb33e 100644
--- a/test/widgets/effective_text_test.dart
+++ b/test/widgets/effective_text_test.dart
@@ -172,5 +172,56 @@ void main() {
         ]),
       );
     });
+
+    testWidgets('Match against complete TextStyle', (widgetTester) async {
+      final style = TextStyle(
+        fontSize: 20,
+        fontStyle: FontStyle.italic,
+        fontWeight: FontWeight.bold,
+        letterSpacing: 2,
+      );
+      await widgetTester.pumpWidget(
+        MaterialApp(
+          home: DefaultTextStyle(
+            style: style,
+            child: Text(''),
+          ),
+        ),
+      );
+      spot<Text>().existsOnce().hasEffectiveTextStyle(style);
+    });
+
+    testWidgets(
+        'Failed matching against complete TextStyle shows current values',
+        (widgetTester) async {
+      final style = TextStyle(
+        fontSize: 20,
+        fontStyle: FontStyle.italic,
+        fontWeight: FontWeight.bold,
+        letterSpacing: 2,
+      );
+      await widgetTester.pumpWidget(
+        MaterialApp(
+          home: DefaultTextStyle(
+            style: style,
+            child: Text(''),
+          ),
+        ),
+      );
+
+      expect(
+        () => spot<Text>().existsOnce().hasEffectiveTextStyle(
+              style.copyWith(
+                fontSize: 16,
+                fontStyle: FontStyle.normal,
+                fontWeight: FontWeight.normal,
+                letterSpacing: 1,
+              ),
+            ),
+        throwsSpotErrorContaining([
+          'has "textStyle" that: equals <TextStyle(inherit: true, size: 16.0, weight: 400, style: normal, letterSpacing: 1.0)>, actual: <TextStyle(inherit: true, size: 20.0, weight: 700, style: italic, letterSpacing: 2.0)>',
+        ]),
+      );
+    });
   });
 }