Issue 26249. Quick Assist to convert getters into final fields.

pkg/analysis_server/test/services/correction/assist_test.dart

 // Copyright (c) 2014, 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.
 
 library test.services.correction.assist;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/edit/assist/assist_core.dart';
 import 'package:analysis_server/plugin/protocol/protocol.dart';
@@ skipping 1414 matching lines @@
         DartAssistKind.CONVERT_TO_FIELD_PARAMETER,
         '''
 class A {
   double aaa2;
   int bbb2;
   A(int aaa, this.bbb2) : aaa2 = aaa;
 }
 ''');
   }
 
+  test_convertToFinalField_BAD_hasSetter_inThisClass() async {
+    resolveTestUnit('''
+class A {
+  int get foo => null;
+  void set foo(_) {}
+}
+''');
+    await assertNoAssistAt('get foo', DartAssistKind.CONVERT_INTO_FINAL_FIELD);
+  }
+
+  test_convertToFinalField_BAD_notExpressionBody() async {
+    resolveTestUnit('''
+class A {
+  int get foo {
+    int v = 1 + 2;
+    return v + 3;
+  }
+}
+''');
+    await assertNoAssistAt('get foo', DartAssistKind.CONVERT_INTO_FINAL_FIELD);
+  }
+
+  test_convertToFinalField_BAD_notGetter() async {
+    resolveTestUnit('''
+class A {
+  int foo() => 42;
+}
+''');
+    await assertNoAssistAt('foo', DartAssistKind.CONVERT_INTO_FINAL_FIELD);
+  }
+
+  test_convertToFinalField_OK_blockBody_onlyReturnStatement() async {
+    resolveTestUnit('''
+class A {
+  int get foo {
+    return 1 + 2;
+  }
+}
+''');
+    await assertHasAssistAt(
+        'get foo',
+        DartAssistKind.CONVERT_INTO_FINAL_FIELD,
+        '''
+class A {
+  final int foo = 1 + 2;
+}
+''');
+  }
+
+  test_convertToFinalField_OK_hasOverride() async {
+    resolveTestUnit('''
+const myAnnotation = const Object();
+class A {
+  @myAnnotation
+  int get foo => 42;
+}
+''');
+    await assertHasAssistAt(
+        'get foo',
+        DartAssistKind.CONVERT_INTO_FINAL_FIELD,
+        '''
+const myAnnotation = const Object();
+class A {
+  @myAnnotation
+  final int foo = 42;
+}
+''');
+  }
+
+  test_convertToFinalField_OK_hasSetter_inSuper() async {
+    resolveTestUnit('''
+class A {
+  void set foo(_) {}
+}
+class B extends A {
+  int get foo => null;
+}
+''');
+    await assertHasAssistAt(
+        'get foo',
+        DartAssistKind.CONVERT_INTO_FINAL_FIELD,
+        '''
+class A {
+  void set foo(_) {}
+}
+class B extends A {
+  final int foo;
+}
+''');
+  }
+
+  test_convertToFinalField_OK_notNull() async {
+    resolveTestUnit('''
+class A {
+  int get foo => 1 + 2;
+}
+''');
+    await assertHasAssistAt(
+        'get foo',
+        DartAssistKind.CONVERT_INTO_FINAL_FIELD,
+        '''
+class A {
+  final int foo = 1 + 2;
+}
+''');
+  }
+
+  test_convertToFinalField_OK_null() async {
+    resolveTestUnit('''
+class A {
+  int get foo => null;
+}
+''');
+    await assertHasAssistAt(
+        'get foo',
+        DartAssistKind.CONVERT_INTO_FINAL_FIELD,
+        '''
+class A {
+  final int foo;
+}
+''');
+  }
+
+  test_convertToFinalField_OK_onName() async {
+    resolveTestUnit('''
+class A {
+  int get foo => 42;
+}
+''');
+    await assertHasAssistAt(
+        'foo',
+        DartAssistKind.CONVERT_INTO_FINAL_FIELD,
+        '''
+class A {
+  final int foo = 42;
+}
+''');
+  }
+
+  test_convertToFinalField_OK_onReturnType_parameterized() async {
+    resolveTestUnit('''
+class A {
+  List<int> get foo => null;
+}
+''');
+    await assertHasAssistAt(
+        'nt> get',
+        DartAssistKind.CONVERT_INTO_FINAL_FIELD,
+        '''
+class A {
+  final List<int> foo;
+}
+''');
+  }
+
+  test_convertToFinalField_OK_onReturnType_simple() async {
+    resolveTestUnit('''
+class A {
+  int get foo => 42;
+}
+''');
+    await assertHasAssistAt(
+        'int get',
+        DartAssistKind.CONVERT_INTO_FINAL_FIELD,
+        '''
+class A {
+  final int foo = 42;
+}
+''');
+  }
+
   test_convertToForIndex_BAD_bodyNotBlock() async {
     resolveTestUnit('''
 main(List<String> items) {
   for (String item in items) print(item);
 }
 ''');
     await assertNoAssistAt(
         'for (String', DartAssistKind.CONVERT_INTO_FOR_INDEX);
   }
 
@@ skipping 2504 matching lines @@
       positions.add(new Position(testFile, offset));
     }
     return positions;
   }
 
   void _setStartEndSelection() {
     offset = findOffset('// start\n') + '// start\n'.length;
     length = findOffset('// end') - offset;
   }
 }