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// Copyright (c) 2016, 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.
@deprecated
library analyzer.test.constant_test;
import 'package:analyzer/dart/element/element.dart';
import 'package:analyzer/src/dart/element/element.dart';
import 'package:analyzer/src/error/codes.dart';
import 'package:analyzer/src/generated/constant.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';
import '../src/dart/resolution/context_collection_resolution.dart';
main() {
defineReflectiveSuite(() {
defineReflectiveTests(ConstantEvaluatorTest);
});
}
@reflectiveTest
class ConstantEvaluatorTest extends PubPackageResolutionTest {
void assertTypeArguments(DartObject value, List<String>? typeArgumentNames) {
var typeArguments = (value as DartObjectImpl).typeArguments;
if (typeArguments == null) {
expect(typeArguments, typeArgumentNames);
return;
}
expect(
typeArguments.map((arg) => arg.getDisplayString(withNullability: true)),
equals(typeArgumentNames),
);
}
test_bitAnd_int_int() async {
await _assertValueInt(74 & 42, "74 & 42");
}
test_bitNot() async {
await _assertValueInt(~42, "~42");
}
test_bitOr_int_int() async {
await _assertValueInt(74 | 42, "74 | 42");
}
test_bitXor_int_int() async {
await _assertValueInt(74 ^ 42, "74 ^ 42");
}
test_conditionalExpression_unknownCondition_dynamic() async {
await assertErrorsInCode('''
const bool kIsWeb = identical(0, 0.0);
const x = kIsWeb ? a : b;
''', [
error(CompileTimeErrorCode.CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE, 58,
1),
error(CompileTimeErrorCode.UNDEFINED_IDENTIFIER, 58, 1),
error(CompileTimeErrorCode.UNDEFINED_IDENTIFIER, 62, 1),
error(CompileTimeErrorCode.CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE, 62,
1),
]);
var x_result = findElement.topVar('x').evaluationResult;
assertDartObjectText(x_result.value, r'''
dynamic <unknown>
''');
}
test_constructorInvocation_fieldInitializer() async {
var result = await _getExpressionValue("const C(2)", context: '''
class C {
final int x;
const C(this.x);
}
''');
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, 'C');
DartObject x = value.getField('x')!;
assertType(x.type, 'int');
expect(x.toIntValue(), 2);
}
test_constructorInvocation_noArgs() async {
var result = await _getExpressionValue(
"const C()",
context: 'class C {const C();}',
);
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, 'C');
}
test_constructorInvocation_noConstConstructor() async {
var result = await _getExpressionValue(
"const C()",
context: 'class C {}',
);
expect(result.isValid, isFalse);
var value = result.value;
expect(value, isNull);
}
test_constructorInvocation_simpleArgs() async {
var result = await _getExpressionValue("const C(1)", context: '''
class C {
const C(int x);
}
''');
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, 'C');
}
test_constructorReference_generic_named() async {
var result = await _getExpressionValue("C<int>.foo", context: '''
class C<T> {
C.foo();
}
''');
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, 'C<int> Function()');
}
test_constructorReference_generic_unnamed() async {
var result = await _getExpressionValue("C<int>.new", context: '''
class C<T> {
C.new();
}
''');
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, 'C<int> Function()');
}
test_constructorReference_nonGeneric_named() async {
var result = await _getExpressionValue("C.foo", context: '''
class C {
const C.foo();
}
''');
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, 'C Function()');
}
test_constructorReference_nonGeneric_unnamed() async {
var result = await _getExpressionValue("C.new", context: '''
class C {
const C();
}
''');
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, 'C Function()');
}
test_divide_double_double() async {
await _assertValueDouble(3.2 / 2.3, "3.2 / 2.3");
}
test_divide_double_double_byZero() async {
var result = await _getExpressionValue("3.2 / 0.0");
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, "double");
expect(value.toDoubleValue()!.isInfinite, isTrue);
}
test_divide_int_int() async {
await _assertValueDouble(1.5, "3 / 2");
}
test_divide_int_int_byZero() async {
var result = await _getExpressionValue("3 / 0");
expect(result.isValid, isTrue);
}
test_equal_boolean_boolean() async {
await _assertValueBool(false, "true == false");
}
test_equal_int_int() async {
await _assertValueBool(false, "2 == 3");
}
test_equal_invalidLeft() async {
var result = await _getExpressionValue("a == 3");
expect(result.isValid, isFalse);
}
test_equal_invalidRight() async {
var result = await _getExpressionValue("2 == a");
expect(result.isValid, isFalse);
}
test_equal_string_string() async {
await _assertValueBool(false, "'a' == 'b'");
}
test_greaterThan_int_int() async {
await _assertValueBool(false, "2 > 3");
}
test_greaterThanOrEqual_int_int() async {
await _assertValueBool(false, "2 >= 3");
}
@failingTest
test_identifier_class() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_identifier_function() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_identifier_static() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_identifier_staticMethod() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_identifier_topLevel() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_identifier_typeParameter() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
test_lessThan_int_int() async {
await _assertValueBool(true, "2 < 3");
}
test_lessThanOrEqual_int_int() async {
await _assertValueBool(true, "2 <= 3");
}
test_literal_boolean_false() async {
await _assertValueBool(false, "false");
}
test_literal_boolean_true() async {
await _assertValueBool(true, "true");
}
test_literal_list() async {
var result = await _getExpressionValue("const ['a', 'b', 'c']");
expect(result.isValid, isTrue);
}
test_literal_list_explicitType() async {
var result = await _getExpressionValue("const <String>['a', 'b', 'c']");
expect(result.isValid, isTrue);
}
test_literal_list_explicitType_functionType() async {
var result = await _getExpressionValue("const <void Function()>[]");
expect(result.isValid, isTrue);
}
test_literal_list_forElement() async {
var result = await _getExpressionValue('''
const [for (var i = 0; i < 4; i++) i]
''');
expect(result.isValid, isFalse);
expect(result.errors, isNotEmpty);
}
test_literal_map() async {
var result = await _getExpressionValue(
"const {'a' : 'm', 'b' : 'n', 'c' : 'o'}",
);
expect(result.isValid, isTrue);
var map = result.value!.toMapValue()!;
expect(map.keys.map((k) => k!.toStringValue()), ['a', 'b', 'c']);
}
test_literal_null() async {
var result = await _getExpressionValue("null");
expect(result.isValid, isTrue);
DartObject value = result.value!;
expect(value.isNull, isTrue);
}
test_literal_number_double() async {
await _assertValueDouble(3.45, "3.45");
}
test_literal_number_integer() async {
await _assertValueInt(42, "42");
}
test_literal_string_adjacent() async {
await _assertValueString("abcdef", "'abc' 'def'");
}
test_literal_string_interpolation_invalid() async {
var result = await _getExpressionValue("'a\${f()}c'");
expect(result.isValid, isFalse);
}
test_literal_string_interpolation_valid() async {
await _assertValueString("a3c", "'a\${3}c'");
}
test_literal_string_simple() async {
await _assertValueString("abc", "'abc'");
}
test_logicalAnd() async {
await _assertValueBool(false, "true && false");
}
test_logicalNot() async {
await _assertValueBool(false, "!true");
}
test_logicalOr() async {
await _assertValueBool(true, "true || false");
}
test_minus_double_double() async {
await _assertValueDouble(3.2 - 2.3, "3.2 - 2.3");
}
test_minus_int_int() async {
await _assertValueInt(1, "3 - 2");
}
test_negated_boolean() async {
var result = await _getExpressionValue("-true");
expect(result.isValid, isFalse);
}
test_negated_double() async {
await _assertValueDouble(-42.3, "-42.3");
}
test_negated_integer() async {
await _assertValueInt(-42, "-42");
}
test_notEqual_boolean_boolean() async {
await _assertValueBool(true, "true != false");
}
test_notEqual_int_int() async {
await _assertValueBool(true, "2 != 3");
}
test_notEqual_invalidLeft() async {
var result = await _getExpressionValue("a != 3");
expect(result.isValid, isFalse);
}
test_notEqual_invalidRight() async {
var result = await _getExpressionValue("2 != a");
expect(result.isValid, isFalse);
}
test_notEqual_string_string() async {
await _assertValueBool(true, "'a' != 'b'");
}
test_object_enum() async {
await resolveTestCode('''
enum E { v1, v2 }
const x1 = E.v1;
const x2 = E.v2;
''');
_assertTopVarConstValue('x1', r'''
E
_name: String v1
index: int 0
''');
_assertTopVarConstValue('x2', r'''
E
_name: String v2
index: int 1
''');
}
/// Enum constants can reference other constants.
test_object_enum_enhanced_constants() async {
await assertNoErrorsInCode('''
enum E {
v1(42), v2(v1);
final Object? a;
const E([this.a]);
}
''');
assertDartObjectText(findElement.field('v2').evaluationResult.value, r'''
E
_name: String v2
a: E
_name: String v1
a: int 42
index: int 0
index: int 1
''');
}
test_object_enum_enhanced_named() async {
await resolveTestCode('''
enum E<T> {
v1<double>.named(10),
v2.named(20);
final T f;
const E.named(this.f);
}
const x1 = E.v1;
const x2 = E.v2;
''');
_assertTopVarConstValue('x1', r'''
E<double>
_name: String v1
f: double 10.0
index: int 0
''');
_assertTopVarConstValue('x2', r'''
E<int>
_name: String v2
f: int 20
index: int 1
''');
}
test_object_enum_enhanced_unnamed() async {
await resolveTestCode('''
enum E<T> {
v1<int>(10),
v2(20),
v3('abc');
final T f;
const E(this.f);
}
const x1 = E.v1;
const x2 = E.v2;
const x3 = E.v3;
''');
_assertTopVarConstValue('x1', r'''
E<int>
_name: String v1
f: int 10
index: int 0
''');
_assertTopVarConstValue('x2', r'''
E<int>
_name: String v2
f: int 20
index: int 1
''');
_assertTopVarConstValue('x3', r'''
E<String>
_name: String v3
f: String abc
index: int 2
''');
}
test_parenthesizedExpression() async {
await _assertValueString("a", "('a')");
}
test_plus_double_double() async {
await _assertValueDouble(2.3 + 3.2, "2.3 + 3.2");
}
test_plus_int_int() async {
await _assertValueInt(5, "2 + 3");
}
test_plus_string_string() async {
await _assertValueString("ab", "'a' + 'b'");
}
@failingTest
test_prefixedIdentifier_invalid() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_prefixedIdentifier_valid() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_propertyAccess_invalid() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_propertyAccess_valid() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_simpleIdentifier_invalid() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
@failingTest
test_simpleIdentifier_valid() async {
var result = await _getExpressionValue("?");
expect(result.isValid, isTrue);
var value = result.value;
expect(value, null);
}
test_stringLength_complex() async {
await _assertValueInt(6, "('qwe' + 'rty').length");
}
test_stringLength_simple() async {
await _assertValueInt(6, "'Dvorak'.length");
}
test_superFormalParameter_explicitSuper_hasNamedArgument_requiredNamed() async {
await assertNoErrorsInCode('''
class A {
final int a;
final int b;
const A({required this.a, required this.b});
}
class B extends A {
final int c;
const B(this.c, {required super.b}) : super(a: 1);
}
const x = B(3, b: 2);
''');
var value = findElement.topVar('x').evaluationResult.value;
assertDartObjectText(value, r'''
B
(super): A
a: int 1
b: int 2
c: int 3
''');
}
test_superFormalParameter_explicitSuper_hasNamedArgument_requiredPositional() async {
await assertNoErrorsInCode('''
class A {
final int a;
final int b;
const A(this.a, {required this.b});
}
class B extends A {
final int c;
const B(super.a, {required this.c}) : super(b: 2);
}
const x = B(1, c: 3);
''');
var value = findElement.topVar('x').evaluationResult.value;
assertDartObjectText(value, r'''
B
(super): A
a: int 1
b: int 2
c: int 3
''');
}
test_superFormalParameter_explicitSuper_requiredNamed() async {
await assertNoErrorsInCode('''
class A {
final int a;
const A({required this.a});
}
class B extends A {
final int b;
const B(this.b, {required super.a}) : super();
}
const x = B(2, a: 1);
''');
var value = findElement.topVar('x').evaluationResult.value;
assertDartObjectText(value, r'''
B
(super): A
a: int 1
b: int 2
''');
}
test_superFormalParameter_explicitSuper_requiredPositional() async {
await assertNoErrorsInCode('''
class A {
final int a;
const A(this.a);
}
class B extends A {
final int b;
const B(super.a, this.b) : super();
}
const x = B(1, 2);
''');
var value = findElement.topVar('x').evaluationResult.value;
assertDartObjectText(value, r'''
B
(super): A
a: int 1
b: int 2
''');
}
test_superFormalParameter_implicitSuper_requiredNamed() async {
await assertNoErrorsInCode('''
class A {
final int a;
const A({required this.a});
}
class B extends A {
final int b;
const B(this.b, {required super.a});
}
const x = B(2, a: 1);
''');
var value = findElement.topVar('x').evaluationResult.value;
assertDartObjectText(value, r'''
B
(super): A
a: int 1
b: int 2
''');
}
test_superFormalParameter_implicitSuper_requiredPositional() async {
await assertNoErrorsInCode('''
class A {
final int a;
const A(this.a);
}
class B extends A {
final int b;
const B(super.a, this.b);
}
const x = B(1, 2);
''');
var value = findElement.topVar('x').evaluationResult.value;
assertDartObjectText(value, r'''
B
(super): A
a: int 1
b: int 2
''');
}
void _assertTopVarConstValue(String name, String expected) {
assertDartObjectText(_topVarConstResult(name).value, expected);
}
Future<void> _assertValueBool(bool expectedValue, String contents) async {
var result = await _getExpressionValue(contents);
DartObject value = result.value!;
assertType(value.type, "bool");
expect(value.toBoolValue(), expectedValue);
}
Future<void> _assertValueDouble(double expectedValue, String contents) async {
var result = await _getExpressionValue(contents);
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, "double");
expect(value.toDoubleValue(), expectedValue);
}
Future<void> _assertValueInt(int expectedValue, String contents) async {
var result = await _getExpressionValue(contents);
expect(result.isValid, isTrue);
DartObject value = result.value!;
assertType(value.type, "int");
expect(value.toIntValue(), expectedValue);
}
Future<void> _assertValueString(String expectedValue, String contents) async {
var result = await _getExpressionValue(contents);
DartObject value = result.value!;
assertType(value.type, 'String');
}
Future<EvaluationResult> _getExpressionValue(String expressionCode,
{String context = ''}) async {
await resolveTestCode('''
var x = $expressionCode;
$context
''');
var expression = findNode.variableDeclaration('x =').initializer!;
var file = getFile(result.path);
var evaluator = ConstantEvaluator(
file.createSource(result.uri),
result.libraryElement as LibraryElementImpl,
);
return evaluator.evaluate(expression);
}
EvaluationResultImpl _topVarConstResult(String name) {
var element = findElement.topVar(name) as ConstTopLevelVariableElementImpl;
return element.evaluationResult!;
}
}
extension on VariableElement {
EvaluationResultImpl get evaluationResult {
var constVariable = this as ConstVariableElement;
var evaluationResult = constVariable.evaluationResult;
if (evaluationResult == null) {
fail('Not evaluated: $this');
}
return evaluationResult;
}
}