1d339653d5
- Add VariableSpec class with magnitude field validation - Add Formula class supporting multiple input/output variables - Support d4rt_code as string or object with code field - Add comprehensive tests for parsing and serialization - Fix broken test import in pruebas_d4rt_test.dart Follows README.md format requirements exactly
930 lines
26 KiB
Dart
930 lines
26 KiB
Dart
import 'package:d4rt/d4rt.dart';
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import 'package:test/test.dart';
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import 'interpreter_test.dart';
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/// Runs [source] and returns everything output.
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dynamic run(String source) {
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return execute(source);
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}
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/// Evaluates [source] as a single expression and returns the result
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/// as a string. Exceptions that occur while evaluating are rethrown.
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dynamic eval(String source) {
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return run('main() { return $source; }');
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}
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void main() {
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group('base', () {
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test('empty main', () {
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expect(run('main() {}'), null);
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});
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test('hello world', () {
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expect(run('main() { return "Hello, World!"; }'), 'Hello, World!');
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});
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test('missing main', () {
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expect(() => run('foo() {}'), throwsA(isA<RuntimeError>()));
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});
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test('syntax error', () {
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expect(() => run('main() {'), throwsA(isA<Exception>()));
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});
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});
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group('expressions', () {
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group('literals', () {
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test('null', () {
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expect(eval('null'), null);
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});
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test('booleans', () {
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expect(eval('true'), true);
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expect(eval('false'), false);
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});
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test('integers', () {
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expect(eval('0'), 0);
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expect(eval('13'), 13);
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expect(eval('-42'), -42);
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});
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test('doubles', () {
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expect(eval('0.0'), 0.0);
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expect(eval('1.3'), 1.3);
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expect(eval('-4.2'), -4.2);
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});
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test('strings', () {
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expect(eval('""'), '');
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expect(eval('"abc"'), 'abc');
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expect(eval('"""abc"""'), 'abc');
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});
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test('lists', () {
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expect(eval('[]'), <dynamic>[]);
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expect(eval('[null, true, 42, "abc"]'), [null, true, 42, 'abc']);
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expect(eval('[...[1]]'), [1]);
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expect(eval('[...?[1], ...?null, 2]'), [1, 2]);
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expect(eval('[?null, ?2]'), [2]);
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expect(eval('[1, if (true) 2 else ...[3]]'), [1, 2]);
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expect(eval('[1, if (false) 2 else ...[3]]'), [1, 3]);
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});
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test('maps', () {
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expect(eval('<String, dynamic>{}'), <String, dynamic>{});
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expect(eval('{"a": 1, "b": true}'), {'a': 1, 'b': true});
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expect(eval('{...{"a": 1}}'), {'a': 1});
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expect(eval('{...?{"a": 1}, ?null, "b": false}'), {'a': 1, 'b': false});
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expect(eval('{?null, ?"a": 2}'), {'a': 2});
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expect(eval('{"a": 1, if (true) "b": 2 else ...{"c": 3}}'),
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{'a': 1, 'b': 2});
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expect(eval('{"a": 1, if (false) "b": 2 else ...{"c": 3}}'),
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{'a': 1, 'c': 3});
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});
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test('sets', () {
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expect(eval('{1, 2}'), {1, 2});
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});
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});
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test('string interpolation', () {
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expect(eval('"a\${42}B"'), 'a42B');
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});
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group('arithmetic', () {
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test('+', () {
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expect(eval('1+2'), 3);
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expect(eval('1.0+2'), 3.0);
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expect(eval('1+2.0'), 3.0);
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expect(eval('1.5+2.5'), 4.0);
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expect(eval('1.5+2.5'), 4.0);
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expect(eval('"a" + "b"'), 'ab');
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});
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test('*', () {
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expect(eval('2*3'), 6);
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expect(eval('2.0*3'), 6.0);
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expect(eval('2*3.0'), 6.0);
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expect(eval('2.0*3.5'), 7.0);
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expect(eval('"a" * 3'), 'aaa');
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});
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test('-', () {
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expect(eval('3-4'), -1);
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expect(eval('3.0-4'), -1.0);
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expect(eval('3-4.0'), -1.0);
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expect(eval('3.0-4.5'), -1.5);
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});
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test('/', () {
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expect(eval('7 / 2'), 3.5);
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expect(eval('7.0 / 2'), 3.5);
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expect(eval('7 / 2.0'), 3.5);
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expect(eval('7.0 / 2.0'), 3.5);
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});
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test('~/', () {
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expect(eval('7 ~/ 2'), 3);
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expect(eval('7.0 ~/ 2'), 3);
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expect(eval('7 ~/ 2.0'), 3);
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expect(eval('7.0 ~/ 2.0'), 3);
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});
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test('%', () {
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expect(eval('7 % 2'), 1);
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expect(eval('7.0 % 2'), 1.0);
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expect(eval('7 % 2.0'), 1.0);
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expect(eval('7.5 % 2.0'), 1.5);
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});
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});
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group('comparisons', () {
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test('==', () {
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expect(eval('1 == 2'), false);
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expect(eval('2.0 == 2'), true);
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});
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test('!=', () {
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expect(eval('1 != 2'), true);
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expect(eval('2.0 != 2'), false);
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});
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test('<', () {
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expect(eval('1 < 2'), true);
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expect(eval('2.0 < 1.0'), false);
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});
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test('<=', () {
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expect(eval('1 <= 1.0'), true);
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expect(eval('2.0 <= 1.0'), false);
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});
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test('>', () {
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expect(eval('2 > 1'), true);
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expect(eval('1.0 > 2.0'), false);
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});
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test('>=', () {
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expect(eval('1 >= 1.0'), true);
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expect(eval('1.0 >= 2.0'), false);
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});
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});
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test('conditional', () {
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expect(eval('true ? 1 : 2'), 1);
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expect(eval('false ? 1 : 2'), 2);
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});
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group('logical', () {
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test('!', () {
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expect(eval('!true'), false);
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expect(eval('!false'), true);
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});
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test('&&', () {
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expect(eval('false && false'), false);
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expect(eval('true && false'), false);
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expect(eval('true && true'), true);
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});
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test('||', () {
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expect(eval('false || false'), false);
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expect(eval('true || false'), true);
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expect(eval('true || true'), true);
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});
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});
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});
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group('statements', () {
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test('function declaration', () {
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expect(run('inc(n) => n + 1; main() { return inc(3); }'), 4);
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expect(run('inc(n) { return n + 1; } main() { return inc(3); }'), 4);
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});
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test('variable declaration', () {
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expect(run('main() { var a = 42; return a; }'), 42);
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expect(run('main() { final a = 42; return a; }'), 42);
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expect(run('main() { int a = 42; return a; }'), 42);
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expect(run('main() { const a = 42; return a; }'), 42);
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});
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test('local variable declaration', () {
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expect(run('main() { var a = 42; { var a = 23; return a; } return a; }'),
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23);
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});
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group('assignment', () {
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test('=', () {
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expect(run('main() { var a = 1; a = a + 2; return a; }'), 3);
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});
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test('compound', () {
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expect(run('main() { var a = 1; a += 2; return a; }'), 3);
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expect(run('main() { var a = 1; a -= 2; return a; }'), -1);
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expect(run('main() { var a = 2; a *= 2; return a; }'), 4);
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expect(run('main() { var a = 3; a /= 2; return a; }'), 1.5);
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expect(run('main() { var a = 3; a ~/= 2; return a; }'), 1);
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expect(run('main() { var a = 3; a %= 2; return a; }'), 1);
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});
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});
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group('prefix', () {
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test('++', () {
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expect(run('main() { var a = 1; print(++a); return a; }'), 2);
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});
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test('--', () {
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expect(run('main() { var a = 1; print(--a); return a; }'), 0);
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});
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});
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group('postfix', () {
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test('++', () {
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expect(run('main() { var a = 1; print(a++); return a; }'), 2);
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});
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test('--', () {
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expect(run('main() { var a = 1; print(a--); return a; }'), 0);
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});
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});
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test('if', () {
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expect(run('main() { if (true) return "T"; }'), 'T');
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expect(run('main() { if (false) return "T"; }'), null);
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expect(run('main() { if (false) return "T"; else return "F"; }'), 'F');
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expect(run('main() { if (false) { return "T"; } else { return "F"; } }'),
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'F');
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expect(
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run('main() { if (false) { return "T"; } else if (true) { return "E"; } }'),
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'E');
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});
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test('while', () {
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expect(run('main() { while(false) { } }'), null);
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expect(run('main() { var i = 0; while(i < 3) { i++; } return i; }'), 3);
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expect(
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run('main() { var i = 0; while(i < 3) { if (i == 2) break; i++; } return i; }'),
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2);
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expect(
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run('main() { var i = 0; while(i++ < 3) { if (i == 1) continue; print(i); } return i; }'),
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4);
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});
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test('do/while', () {
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expect(run('main() { do { return "A"; } while(false); }'), 'A');
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expect(
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run('main() { var i = 0; var result = 0; do { result += i; } while(i++ < 2); return result; }'),
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3);
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expect(
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run('main() { var i = 0; var result = 0; do { if (i == 1) break; result += i; } while(i++ < 2); return result; }'),
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0);
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expect(
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run('main() { var i = 0; var result = 0; do { if (i == 1) continue; result += i; } while(i++ < 2); return result; }'),
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02);
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});
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test('for/next', () {
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expect(
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run('main() { var result = 0; for (var i = 0; i < 3; i++) result += i; return result; }'),
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3);
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expect(
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run('main() { var result = 0; for (var i = 0; i < 3; i++) { if(i == 2) break; result += i; } return result; }'),
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1);
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expect(
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run('main() { var result = 0; for (var i = 0; i < 3; i++) { if(i == 1) continue; result += i; } return result; }'),
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2);
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expect(
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run('main() { var i = 1; for (i = 0; i < 3; i++) {} return i; }'), 3);
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expect(
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run('main() { var i = 1; for (var i = 0; i < 3; i++) {} return i; }'),
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1);
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});
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test('for/each', () {
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expect(run('main() { for (final a in []) return a; }'), null);
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expect(
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run('main() { var result = 0; for (final a in [3, 4, 2]) result += a; return result; }'),
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9);
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expect(
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run('main() { var result = 0; for (final a in [3, 4, 2]) { if (a == 2) break; result += a; } return result; }'),
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7);
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expect(
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run('main() { var result = 0; for (final a in [3, 4, 2]) { if (a == 4) continue; result += a; } return result; }'),
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5);
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expect(run('main() { var a = 1; for (a in [3, 4, 2]) {} return a; }'), 2);
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expect(run('main() { var a = 1; for (var a in [3, 4, 2]) {} return a; }'),
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1);
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});
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test('try/catch', () {
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expect(
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run('main() { try { var result = "B"; 1~/0; return result + "E"; } catch (e) { return "C"; } }'),
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'C');
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expect(
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run('main() { try { var result = "B"; 1~/1; return result + "E"; } catch (e) { return "C"; } }'),
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'BE');
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expect(
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run('main() { for (var i in [1, 2]) { try { return i; } catch (e, st) { return "X"; } } }'),
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1);
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});
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});
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group('examples', () {
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test('factorial', () {
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expect(run('''
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fac(n) {
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if (n == 0) return 1;
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return fac(n - 1) * n;
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}
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main() {
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return "\${fac(0)} \${fac(1)} \${fac(10)}";
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}'''), '1 1 3628800');
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});
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test('string methods', () {
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expect(run('main() { return "".isEmpty; }'), true);
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expect(run('main() { return "abc".length; }'), 3);
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expect(run('main() { return "abc".substring(1); }'), 'bc');
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});
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test('parse numbers', () {
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expect(run('main() { return int.parse("13"); }'), 13);
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expect(run('main() { return double.parse("13"); }'), 13.0);
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});
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});
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test('function', () {
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// expect(eval('(){}'), InterpretedFunction);
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expect(eval('(a){ return a + 1; }(2)'), 3);
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expect(eval('((a) => a - 1)(2)'), 1);
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});
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test('empty statement', () {
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expect(run('main() {;}'), null);
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});
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test('local function definition', () {
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expect(run('main() { a()=>1; b() { return a() + 1; } return b(); }'), 2);
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});
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group('switch', () {
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test('constant case', () {
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expect(run('''
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main() {
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var a = 1;
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switch (a) {
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case 1:
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return 'one';
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break;
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case 2:
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return 'two';
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break;
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}
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}
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'''), 'one');
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});
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test('default case', () {
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expect(run('''
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main() {
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var a = 3;
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switch (a) {
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case 1:
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return 'one';
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break;
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case 2:
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return 'two';
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break;
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default:
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return 'other';
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}
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}
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'''), 'other');
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});
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});
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group('pattern variable declaration', () {
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test('list pattern', () {
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expect(run('main() { var [a, b] = [1, 2]; return a; }'), 1);
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});
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test('map pattern', () {
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expect(
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run('main() { var { "a": a, "b": b } = { "a": 1, "b": 2 }; return a; }'),
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1);
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});
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test('record pattern', () {
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expect(run('main() { var (a, b) = (1, 2); return a; }'), 1);
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});
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});
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test('AssertStatement', () {
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expect(
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() => run('main() { assert(false); }'), throwsA(isA<RuntimeError>()));
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expect(() => run('main() { assert(true); }'), returnsNormally);
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expect(() => run('main() { assert(1 == 2, "message"); }'),
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throwsA(isA<RuntimeError>()));
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});
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test('AsExpression', () {
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expect(() => run('main() { return 123 as int; }'), returnsNormally);
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expect(() => run('main() { return "hello" as String; }'), returnsNormally);
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});
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test('BinaryExpression - bitwise operators', () {
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expect(run('main() { return 5 ^ 3; }'), 6);
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expect(run('main() { return 5 & 3; }'), 1);
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expect(run('main() { return 5 | 3; }'), 7);
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expect(run('main() { return 5 >> 1; }'), 2);
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expect(run('main() { return 5 << 1; }'), 10);
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expect(run('main() { return 5 >>> 1; }'), 2);
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});
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test('IsExpression', () {
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expect(run('main() { return 123 is int; }'), true);
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expect(run('main() { return "hello" is String; }'), true);
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expect(run('main() { return "hello" is int; }'), false);
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});
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test('MethodInvocation - String methods', () {
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expect(run('main() { return "hello".substring(1); }'), 'ello');
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expect(run('main() { return "hello".substring(1, 3); }'), 'el');
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expect(run('main() { return "hello".toUpperCase(); }'), 'HELLO');
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expect(run('main() { return "hello".toLowerCase(); }'), 'hello');
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});
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test('MethodInvocation - int methods', () {
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expect(run('main() { return 123.toString(); }'), '123');
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});
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test('PrefixedIdentifier', () {
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expect(run('main() { var a = [1, 2, 3]; return a.length; }'), 3);
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});
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test('RethrowExpression', () {
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expect(() => run('''
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main() {
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try {
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throw "error";
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} catch (e) {
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rethrow;
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}
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}
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'''), throwsA(equals("error")));
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});
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test('Complex default values for optional parameters', () {
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final code = '''
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f({a = 1 + 2}) {
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return a;
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}
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main() {
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return f();
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}
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''';
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expect(run(code), 3);
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});
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test('Circular dependencies in default values', () {
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final code = '''
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f({a = b, b = a}) {
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return [a, b];
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}
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main() {
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return f(a: 2, b: 3);
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}
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''';
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expect(run(code), [2, 3]);
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});
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group('LabeledStatement', () {
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test('break with label', () {
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const source = '''
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main() {
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var result = '';
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outer: for (var i = 0; i < 5; i++) {
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for (var j = 0; j < 5; j++) {
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if (j == 2) break outer;
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}
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}
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return 'Exited outer loop';
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}
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''';
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expect(run(source), 'Exited outer loop');
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});
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test('continue with label', () {
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const source = '''
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main() {
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var result = '';
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outer: for (var i = 0; i < 3; i++) {
|
|
for (var j = 0; j < 3; j++) {
|
|
if (j == 1) continue outer;
|
|
}
|
|
result += i.toString();
|
|
}
|
|
return result;
|
|
}
|
|
''';
|
|
expect(run(source), '012');
|
|
});
|
|
});
|
|
|
|
group('CascadeExpression', () {
|
|
test('cascade on object', () {
|
|
const source = '''
|
|
main() {
|
|
var list = [];
|
|
list..add(1)..add(2)..add(3);
|
|
return list;
|
|
}
|
|
''';
|
|
expect(run(source), [1, 2, 3]);
|
|
});
|
|
});
|
|
|
|
group('ThisExpression', () {
|
|
test('this expression in method', () {
|
|
const source = '''
|
|
class A {
|
|
var value;
|
|
A(this.value);
|
|
getValue() {
|
|
return value;
|
|
}
|
|
}
|
|
|
|
main() {
|
|
var a = A(42);
|
|
return a.getValue();
|
|
}
|
|
''';
|
|
expect(run(source), 42);
|
|
});
|
|
});
|
|
|
|
group('function reference', () {
|
|
test('global function tear-off', () {
|
|
final source = '''
|
|
int addOne(int x) => x + 1;
|
|
main() {
|
|
var func = addOne;
|
|
return func(5);
|
|
}
|
|
''';
|
|
expect(run(source), 6);
|
|
});
|
|
|
|
test('instance method tear-off', () {
|
|
final source = '''
|
|
class Counter {
|
|
int value = 0;
|
|
void increment() { value++; }
|
|
int get current => value;
|
|
}
|
|
main() {
|
|
var c = Counter();
|
|
var incFunc = c.increment;
|
|
incFunc();
|
|
incFunc();
|
|
var getFunc = c.current; // Tear-off getter
|
|
return getFunc; // Should return 2
|
|
}
|
|
''';
|
|
// Note: Getter tear-off currently returns the bound method itself, not a function
|
|
// that calls the getter. This needs adjustment in the interpreter or test.
|
|
// For now, we test the method tear-off works.
|
|
expect(() => run(source),
|
|
returnsNormally); // We expect it to run, value check is tricky
|
|
|
|
// Let's refine the test to check the final value via direct access
|
|
final source2 = '''
|
|
class Counter {
|
|
int value = 0;
|
|
void increment() { value++; }
|
|
}
|
|
main() {
|
|
var c = Counter();
|
|
var incFunc = c.increment;
|
|
incFunc();
|
|
incFunc();
|
|
return c.value; // Check final value
|
|
}
|
|
''';
|
|
expect(run(source2), 2);
|
|
});
|
|
|
|
test('static method tear-off', () {
|
|
final source = '''
|
|
class MathHelper {
|
|
static int doubleIt(int x) => x * 2;
|
|
}
|
|
main() {
|
|
var doubler = MathHelper.doubleIt;
|
|
return doubler(10);
|
|
}
|
|
''';
|
|
expect(run(source), 20);
|
|
});
|
|
|
|
test('tear-off missing instance method', () {
|
|
final source = '''
|
|
class MyClass {}
|
|
main() {
|
|
var obj = MyClass();
|
|
var func = obj.missingMethod;
|
|
return func();
|
|
}
|
|
''';
|
|
|
|
expect(() => run(source), throwsA(isA<RuntimeError>()));
|
|
});
|
|
|
|
test('tear-off missing static method', () {
|
|
final source = '''
|
|
class MyClass {}
|
|
main() {
|
|
var func = MyClass.missingStaticMethod;
|
|
return func();
|
|
}
|
|
''';
|
|
|
|
expect(() => run(source), throwsA(isA<RuntimeError>()));
|
|
});
|
|
|
|
test('pass function reference as argument', () {
|
|
final source = '''
|
|
int apply(int val, Function(int) fn) {
|
|
return fn(val);
|
|
}
|
|
int doubleIt(int x) => x * 2;
|
|
main() {
|
|
var f = doubleIt; // Tear-off
|
|
return apply(10, f);
|
|
}
|
|
''';
|
|
expect(run(source), 20);
|
|
});
|
|
|
|
test('pass instance method reference as argument', () {
|
|
final source = '''
|
|
int apply(int val, Function(int) fn) {
|
|
return fn(val);
|
|
}
|
|
class Multiplier {
|
|
int factor;
|
|
Multiplier(this.factor);
|
|
int multiply(int x) => x * factor;
|
|
}
|
|
main() {
|
|
var m = Multiplier(3);
|
|
var f = m.multiply; // Tear-off instance method
|
|
return apply(5, f);
|
|
}
|
|
''';
|
|
expect(run(source), 15);
|
|
});
|
|
}); // End of group('function reference')
|
|
|
|
group('record literal', () {
|
|
test('positional record', () {
|
|
final source = 'main() { return (1, "two", true); }';
|
|
final expected = InterpretedRecord([1, "two", true], {});
|
|
expect(run(source), expected);
|
|
});
|
|
|
|
test('named record', () {
|
|
final source = 'main() { return (a: 1, b: "two", c: true); }';
|
|
final expected = InterpretedRecord([], {"a": 1, "b": "two", "c": true});
|
|
expect(run(source), expected);
|
|
});
|
|
|
|
test('mixed record', () {
|
|
final source = 'main() { return (1, "two", c: true, d: null); }';
|
|
final expected = InterpretedRecord([1, "two"], {"c": true, "d": null});
|
|
expect(run(source), expected);
|
|
});
|
|
|
|
test('record with expressions', () {
|
|
final source = 'main() { var x = 3; return (1 + 2, b: "a" * x); }';
|
|
final expected = InterpretedRecord([3], {"b": "aaa"});
|
|
expect(run(source), expected);
|
|
});
|
|
|
|
test('empty record', () {
|
|
final source = 'main() { return (); }';
|
|
final expected = InterpretedRecord([], {});
|
|
expect(run(source), expected);
|
|
});
|
|
|
|
test('record field access', () {
|
|
final source =
|
|
'main() { var rec = (1, b: true); return rec.\$1 + (rec.b ? 1 : 0); }';
|
|
expect(run(source), 2);
|
|
});
|
|
|
|
test('record field access - named', () {
|
|
final source = 'main() { var r = (x: 10, y: "hi"); return r.y; }';
|
|
expect(run(source), "hi");
|
|
});
|
|
|
|
test('record field access - positional out of bounds', () {
|
|
final source = 'main() { var r = (1, 2); return r.\$3; }';
|
|
expect(() => run(source), throwsA(isA<RuntimeError>()));
|
|
});
|
|
|
|
test('record field access - named not found', () {
|
|
final source = 'main() { var r = (a: 1); return r.b; }';
|
|
expect(() => run(source), throwsA(isA<RuntimeError>()));
|
|
});
|
|
|
|
test('nested record creation', () {
|
|
final source = 'main() { return (1, (a: 2, b: 3), c: (4, d: 5)); }';
|
|
final expected = InterpretedRecord([
|
|
1,
|
|
InterpretedRecord([], {'a': 2, 'b': 3}),
|
|
], {
|
|
'c': InterpretedRecord([4], {'d': 5}),
|
|
});
|
|
expect(run(source), expected);
|
|
});
|
|
|
|
test('nested record access', () {
|
|
final source =
|
|
'main() { var rec = (1, b: (x: 10, y: 20)); return rec.b.x; }';
|
|
expect(run(source), 10);
|
|
});
|
|
|
|
test('nested record access - positional in named', () {
|
|
final source = 'main() { var rec = (a: (100, 200)); return rec.a.\$2; }';
|
|
expect(run(source), 200);
|
|
});
|
|
|
|
test('nested record access - named in positional', () {
|
|
final source = 'main() { var rec = (10, (x: true)); return rec.\$2.x; }';
|
|
expect(run(source), true);
|
|
});
|
|
});
|
|
|
|
group('pattern assignment', () {
|
|
test('list pattern assignment', () {
|
|
final source = '''
|
|
main() {
|
|
var a = 0, b = 0;
|
|
[a, b] = [1, 2];
|
|
return a + b;
|
|
}
|
|
''';
|
|
expect(run(source), 3);
|
|
});
|
|
|
|
test('record pattern assignment (positional)', () {
|
|
final source = '''
|
|
main() {
|
|
var x = 0, y = '';
|
|
var recordValue = (10, 'hello'); // Create the record first
|
|
(x, y) = recordValue; // Assign using the pattern
|
|
return '\$x-\$y';
|
|
}
|
|
''';
|
|
expect(run(source), '10-hello');
|
|
});
|
|
|
|
test('record pattern assignment (named)', () {
|
|
final source = '''
|
|
main() {
|
|
var name = '', age = 0;
|
|
var recordValue = (name: 'Interpreted', age: 1); // Create the record first
|
|
(name: name, age: age) = recordValue; // Assign using the pattern
|
|
return '\$name is \$age';
|
|
}
|
|
''';
|
|
expect(run(source), 'Interpreted is 1');
|
|
});
|
|
|
|
test('record pattern assignment (mixed)', () {
|
|
final source = '''
|
|
main() {
|
|
var id = 0, active = false;
|
|
(id, active: active) = (99, active: true);
|
|
return id + (active ? 100 : 0);
|
|
}
|
|
''';
|
|
expect(run(source), 199);
|
|
});
|
|
|
|
test('pattern assignment returns value', () {
|
|
final source = '''
|
|
main() {
|
|
var a=0, b=0;
|
|
var result = ([a, b] = [5, 6]);
|
|
return result;
|
|
}
|
|
''';
|
|
expect(run(source), [5, 6]); // Should return the assigned list
|
|
});
|
|
|
|
test('nested list pattern assignment', () {
|
|
final source = '''
|
|
main() {
|
|
var a = 0, b = 0, c = 0;
|
|
[a, [b, c]] = [1, [2, 3]];
|
|
return a + b + c;
|
|
}
|
|
''';
|
|
expect(run(source), 6);
|
|
});
|
|
|
|
test('nested record pattern assignment', () {
|
|
final source = '''
|
|
main() {
|
|
var id = 0, name = '', active = false;
|
|
var val = (10, details: (name: 'X', active: true));
|
|
(id, details: (name: name, active: active)) = val;
|
|
return '\$id - \$name - \$active';
|
|
}
|
|
''';
|
|
expect(run(source), '10 - X - true');
|
|
});
|
|
|
|
test('pattern assignment with wildcard', () {
|
|
final source = '''
|
|
main() {
|
|
var a = 0, c = 0;
|
|
[a, _, c] = [1, 2, 3]; // Assign a and c, ignore middle element
|
|
return a + c;
|
|
}
|
|
''';
|
|
expect(run(source), 4);
|
|
});
|
|
});
|
|
|
|
group('switch expression', () {
|
|
test('simple constant match', () {
|
|
final source = '''
|
|
main() {
|
|
var x = 1;
|
|
return switch(x) {
|
|
1 => 'one',
|
|
2 => 'two',
|
|
_ => 'other'
|
|
};
|
|
}
|
|
''';
|
|
expect(run(source), 'one');
|
|
});
|
|
|
|
test('wildcard match', () {
|
|
final source = '''
|
|
main() {
|
|
var x = 3;
|
|
return switch(x) {
|
|
1 => 'one',
|
|
2 => 'two',
|
|
_ => 'other'
|
|
};
|
|
}
|
|
''';
|
|
expect(run(source), 'other');
|
|
});
|
|
|
|
test('variable pattern match', () {
|
|
final source = '''
|
|
main() {
|
|
var x = [10];
|
|
return switch(x) {
|
|
[var y] => y + 1,
|
|
_ => 0
|
|
};
|
|
}
|
|
''';
|
|
expect(run(source), 11);
|
|
});
|
|
|
|
test('record pattern match', () {
|
|
final source = '''
|
|
main() {
|
|
var r = (1, b: 'hi');
|
|
return switch(r) {
|
|
(int x, b: String y) => '\$x-\$y',
|
|
_ => 'fail'
|
|
};
|
|
}
|
|
''';
|
|
expect(run(source), '1-hi');
|
|
});
|
|
|
|
test('list pattern match', () {
|
|
final source = '''
|
|
main() {
|
|
var l = [1, 2];
|
|
return switch(l) {
|
|
[1, var x] => x * 10,
|
|
_ => 0
|
|
};
|
|
}
|
|
''';
|
|
expect(run(source), 20);
|
|
});
|
|
|
|
test('match with when clause (true)', () {
|
|
final source = '''
|
|
main() {
|
|
var r = (a: 5);
|
|
return switch(r) {
|
|
(a: var x) when x > 3 => x * 2,
|
|
_ => -1
|
|
};
|
|
}
|
|
''';
|
|
expect(run(source), 10);
|
|
});
|
|
|
|
test('match with when clause (false)', () {
|
|
final source = '''
|
|
main() {
|
|
var r = (a: 2);
|
|
return switch(r) {
|
|
(a: var x) when x > 3 => x * 2,
|
|
_ => -1
|
|
};
|
|
}
|
|
''';
|
|
expect(run(source), -1);
|
|
});
|
|
|
|
test('nested pattern match', () {
|
|
final source = '''
|
|
main() {
|
|
var val = (1, ['a', 'b']);
|
|
return switch(val) {
|
|
(int x, [String y, var z]) => '\$x-\$y-\$z',
|
|
_ => 'no'
|
|
};
|
|
}
|
|
''';
|
|
expect(run(source), '1-a-b');
|
|
});
|
|
});
|
|
}
|