Move sized_box_for_whitespace tests (#4684)

test/rule_test_support.dart

@@ -472,11 +472,14 @@ class Container extends StatelessWidget {
     super.key,
     Color? color,
     double? width,
+    double? height,
     Widget? child,
   });
 }
 
 class SizedBox implements Widget {}
+
+class Row implements Widget {}
 ''');
 
     libFolder

test/rules/all.dart

@@ -143,6 +143,7 @@ import 'provide_deprecation_message_test.dart' as provide_deprecation_message;
 import 'public_member_api_docs_test.dart' as public_member_api_docs;
 import 'recursive_getters_test.dart' as recursive_getters;
 import 'secure_pubspec_urls_test.dart' as secure_pubspec_urls;
+import 'sized_box_for_whitespace_test.dart' as sized_box_for_whitespace;
 import 'slash_for_doc_comments_test.dart' as slash_for_doc_comments;
 import 'sort_constructors_first_test.dart' as sort_constructors_first;
 import 'sort_pub_dependencies_test.dart' as sort_pub_dependencies;
@@ -322,6 +323,7 @@ void main() {
   public_member_api_docs.main();
   recursive_getters.main();
   secure_pubspec_urls.main();
+  sized_box_for_whitespace.main();
   slash_for_doc_comments.main();
   sort_constructors_first.main();
   sort_pub_dependencies.main();

test/rules/sized_box_for_whitespace_test.dart

@@ -0,0 +1,145 @@
+// Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import '../rule_test_support.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(SizedBoxForWhitespaceTest);
+  });
+}
+
+@reflectiveTest
+class SizedBoxForWhitespaceTest extends LintRuleTest {
+  @override
+  bool get addFlutterPackageDep => true;
+
+  @override
+  String get lintRule => 'sized_box_for_whitespace';
+
+  test_hasChild() async {
+    await assertNoDiagnostics(r'''
+import 'package:flutter/widgets.dart';
+
+Widget f() {
+  return Container(
+    child: Row(),
+  );
+}
+''');
+  }
+
+  test_hasHeight_andChild() async {
+    await assertDiagnostics(r'''
+import 'package:flutter/widgets.dart';
+
+Widget f() {
+  return Container(
+    height: 10,
+    child: Row(),
+  );
+}
+''', [
+      lint(62, 9),
+    ]);
+  }
+
+  test_hasHeight_noChild() async {
+    await assertNoDiagnostics(r'''
+import 'package:flutter/widgets.dart';
+
+Widget f() {
+  return Container(
+    height:10,
+  );
+}
+''');
+  }
+
+  test_hasWidth_andChild() async {
+    await assertDiagnostics(r'''
+import 'package:flutter/widgets.dart';
+
+Widget f() {
+  return Container(
+    width: 10,
+    child: Row(),
+  );
+}
+''', [
+      lint(62, 9),
+    ]);
+  }
+
+  test_hasWidth_noChild() async {
+    await assertNoDiagnostics(r'''
+import 'package:flutter/widgets.dart';
+
+Widget f() {
+  return Container(
+    width: 10,
+  );
+}
+''');
+  }
+
+  test_hasWidthAndHeight_andChild() async {
+    await assertDiagnostics(r'''
+import 'package:flutter/widgets.dart';
+
+Widget f() {
+  return Container(
+    width: 10,
+    height: 10,
+    child: Row(),
+  );
+}
+''', [
+      lint(62, 9),
+    ]);
+  }
+
+  test_hasWidthAndHeight_andKey_noChild() async {
+    await assertDiagnostics(r'''
+import 'package:flutter/widgets.dart';
+
+Widget f() {
+  return Container(
+    key: Key(''),
+    width: 10,
+    height: 10,
+  );
+}
+''', [
+      lint(62, 9),
+    ]);
+  }
+
+  test_hasWidthAndHeight_noChild() async {
+    await assertDiagnostics(r'''
+import 'package:flutter/widgets.dart';
+
+Widget f() {
+  return Container(
+    width: 10,
+    height: 10,
+  );
+}
+''', [
+      lint(62, 9),
+    ]);
+  }
+
+  test_noArguments() async {
+    await assertNoDiagnostics(r'''
+import 'package:flutter/widgets.dart';
+
+Widget emptyContainer() {
+  return Container();
+}
+''');
+  }
+}