Added the materialTapTargetSize to the OutlineButton Constructor (#61086)

packages/flutter/lib/src/material/outline_button.dart

@@ -85,6 +85,7 @@ class OutlineButton extends MaterialButton {
     Clip clipBehavior = Clip.none,
     FocusNode focusNode,
     bool autofocus = false,
+    MaterialTapTargetSize materialTapTargetSize,
     Widget child,
   }) : assert(highlightElevation == null || highlightElevation >= 0.0),
        assert(clipBehavior != null),
@@ -108,6 +109,7 @@ class OutlineButton extends MaterialButton {
          shape: shape,
          clipBehavior: clipBehavior,
          focusNode: focusNode,
+         materialTapTargetSize: materialTapTargetSize,
          autofocus: autofocus,
          child: child,
        );
@@ -143,6 +145,7 @@ class OutlineButton extends MaterialButton {
     Clip clipBehavior,
     FocusNode focusNode,
     bool autofocus,
+    MaterialTapTargetSize materialTapTargetSize,
     @required Widget icon,
     @required Widget label,
   }) = _OutlineButtonWithIcon;
@@ -203,6 +206,7 @@ class OutlineButton extends MaterialButton {
       shape: buttonTheme.getShape(this),
       clipBehavior: clipBehavior,
       focusNode: focusNode,
+      materialTapTargetSize: materialTapTargetSize,
       child: child,
     );
   }
@@ -244,6 +248,7 @@ class _OutlineButtonWithIcon extends OutlineButton with MaterialButtonWithIconMi
     Clip clipBehavior = Clip.none,
     FocusNode focusNode,
     bool autofocus = false,
+    MaterialTapTargetSize materialTapTargetSize,
     @required Widget icon,
     @required Widget label,
   }) : assert(highlightElevation == null || highlightElevation >= 0.0),
@@ -274,6 +279,7 @@ class _OutlineButtonWithIcon extends OutlineButton with MaterialButtonWithIconMi
          clipBehavior: clipBehavior,
          focusNode: focusNode,
          autofocus: autofocus,
+         materialTapTargetSize: materialTapTargetSize,
          child: Row(
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
@@ -311,6 +317,7 @@ class _OutlineButton extends StatefulWidget {
     this.focusNode,
     this.autofocus = false,
     this.child,
+    this.materialTapTargetSize,
   }) : assert(highlightElevation != null && highlightElevation >= 0.0),
        assert(highlightedBorderColor != null),
        assert(clipBehavior != null),
@@ -340,6 +347,7 @@ class _OutlineButton extends StatefulWidget {
   final FocusNode focusNode;
   final bool autofocus;
   final Widget child;
+  final MaterialTapTargetSize materialTapTargetSize;
 
   bool get enabled => onPressed != null || onLongPress != null;
 
@@ -489,6 +497,7 @@ class _OutlineButtonState extends State<_OutlineButton> with SingleTickerProvide
           clipBehavior: widget.clipBehavior,
           focusNode: widget.focusNode,
           animationDuration: _kElevationDuration,
+          materialTapTargetSize: widget.materialTapTargetSize,
           child: widget.child,
         );
       },

packages/flutter/test/material/outline_button_test.dart

@@ -1043,6 +1043,97 @@ void main() {
     _checkPhysicalLayer(buttonElement, fillColor.withAlpha(0x00));
   });
 
+  testWidgets('OutlineButton respects the provided materialTapTargetSize', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      Directionality(
+        textDirection: TextDirection.ltr,
+        child: Material(
+          child: Center(
+            child: OutlineButton(
+              materialTapTargetSize: MaterialTapTargetSize.padded,
+              onPressed: () {},
+              child: const SizedBox(width: 50.0, height: 8.0),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    // Default Width of OutlineButton with MaterialTapTargetSize (88)
+    expect(tester.getSize(find.byType(OutlineButton)), const Size(88.0, 48.0));
+
+    await tester.pumpWidget(
+      Directionality(
+        textDirection: TextDirection.ltr,
+        child: Material(
+          child: Center(
+            child: OutlineButton(
+              materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
+              onPressed: () {},
+              child: const SizedBox(width: 50.0, height: 8.0),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    // Default Width of OutlineButton with MaterialTapTargetSize (88)
+    expect(tester.getSize(find.byType(OutlineButton)), const Size(88.0, 36.0));
+
+    final LocalKey key1 = UniqueKey();
+    await tester.pumpWidget(
+      Directionality(
+        textDirection: TextDirection.ltr,
+        child: Material(
+          child: Center(
+            child: OutlineButton.icon(
+              key: key1,
+              materialTapTargetSize: MaterialTapTargetSize.padded,
+              icon: const Icon(Icons.add_alarm),
+              label: const SizedBox(width: 50.0, height: 8.0),
+              onPressed: () { },
+            ),
+          ),
+        ),
+      ),
+    );
+
+    final Size addAlarmIconSize = tester.getSize(find.byIcon(Icons.add_alarm));
+
+    // The expected width is the sum of:
+    // the width of the icon
+    // the gap between the icon and the label (8)
+    // the width of the label (50)
+    // the horizontal padding: start (12), end (16)
+    expect(tester.getSize(find.byKey(key1)), Size(86 + addAlarmIconSize.width, 48.0));
+
+    final LocalKey key2 = UniqueKey();
+    await tester.pumpWidget(
+      Directionality(
+        textDirection: TextDirection.ltr,
+        child: Material(
+          child: Center(
+            child: OutlineButton.icon(
+              key: key2,
+              materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
+              icon: const Icon(Icons.add),
+              label: const SizedBox(width: 50.0, height: 8.0),
+              onPressed: () { },
+            ),
+          ),
+        ),
+      ),
+    );
+
+    // The expected width is the sum of:
+    // the width of the icon
+    // the gap between the icon and the label (8)
+    // the width of the label (50)
+    // the horizontal padding: start (12), end (16)
+    final Size addIconSize = tester.getSize(find.byIcon(Icons.add));
+    expect(tester.getSize(find.byKey(key2)), Size(86 + addIconSize.width, 36.0));
+  });
+
   testWidgets('OutlineButton onPressed and onLongPress callbacks are distinctly recognized', (WidgetTester tester) async {
     bool didPressButton = false;
     bool didLongPressButton = false;