anchor.diff:      await assertNoAssistAt('v = 1', DartAssistKind.JOIN_VARIABLE_DECLARATION);
     }
   
  -  test_joinVariableDeclaration_onAssignment_wrong_notLeftArgument() async {
  +  test_joinVariableDeclaration_onAssignment_BAD_notLeftArgument() async {
       resolveTestUnit('''
   main() {
     var v;
  
positive.code: ''');
    }
  
    test_joinIfStatementInner_OK_conditionAndOr() async {
      resolveTestUnit('''
  main() {
  
negative.code: }
  ''');
      await assertHasAssistAt(
          'v =',
          DartAssistKind.JOIN_VARIABLE_DECLARATION,
          '''
  main() {
    var v = 1;
  }
  ''');
    }
  
    test_joinVariableDeclaration_onDeclaration_BAD_hasInitializer() async {
      resolveTestUnit('''
  main() {
    var v = 1;
    v = 2;
  }
  ''');
      await assertNoAssistAt('v = 1', DartAssistKind.JOIN_VARIABLE_DECLARATION);
    }
  
    test_joinVariableDeclaration_onDeclaration_BAD_lastStatement() async {
      resolveTestUnit('''
  main() {
    if (true)
      var v;
  }
  ''');
      await assertNoAssistAt('v;', DartAssistKind.JOIN_VARIABLE_DECLARATION);
    }
  
    test_joinVariableDeclaration_onDeclaration_BAD_nextNotAssignmentExpression() async {
      resolveTestUnit('''
  main() {
    var v;
    42;
  }
  ''');
      await assertNoAssistAt('v;', DartAssistKind.JOIN_VARIABLE_DECLARATION);
    }
  
    test_joinVariableDeclaration_onDeclaration_BAD_nextNotExpressionStatement() async {
      resolveTestUnit('''
  main() {
    var v;
    if (true) return;
  }
  ''');
      await assertNoAssistAt('v;', DartAssistKind.JOIN_VARIABLE_DECLARATION);
    }
  
    test_joinVariableDeclaration_onDeclaration_BAD_nextNotPureAssignment() async {
      resolveTestUnit('''
  main() {
    var v;
    v += 1;
  }
  ''');
      await assertNoAssistAt('v;', DartAssistKind.JOIN_VARIABLE_DECLARATION);
    }
  
    test_joinVariableDeclaration_onDeclaration_BAD_notOneVariable() async {
      resolveTestUnit('''
  main() {
    var v, v2;
    v = 1;
  }
  ''');
      await assertNoAssistAt('v, ', DartAssistKind.JOIN_VARIABLE_DECLARATION);
    }
  
    test_joinVariableDeclaration_onDeclaration_OK_onName() async {
      resolveTestUnit('''
  main() {
    var v;
    v = 1;
  }
  ''');
      await assertHasAssistAt(
          'v;',
          DartAssistKind.JOIN_VARIABLE_DECLARATION,
          '''
  