tests/compiler/dart2js/closure_codegen_test.dart

// Copyright (c) 2012, 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.
// Test that parameters keep their names in the output.

import "package:expect/expect.dart";
import "package:async_helper/async_helper.dart";
import 'compiler_helper.dart';
import 'parser_helper.dart';

const String TEST_INVOCATION0 = r"""
main() {
  var o = null;
  o();
}
""";

const String TEST_INVOCATION1 = r"""
main() {
  var o = null;
  o(1);
}
""";

const String TEST_INVOCATION2 = r"""
main() {
  var o = null;
  o(1, 2);
}
""";

const String TEST_BAILOUT = r"""
class A {
  var x;
  foo(_) { // make sure only g has no arguments
    var f = function g() { return 499;  };
    return 499 + x + f();
  }
}

main() { new A().foo(1); }
""";

closureInvocation(bool minify, String prefix) {
  String generated = compile(TEST_INVOCATION0, minify: minify);
  Expect.isTrue(generated.contains(".$prefix\$0()"));
  generated = compile(TEST_INVOCATION1, minify: minify);
  Expect.isTrue(generated.contains(".$prefix\$1(1)"));
  generated = compile(TEST_INVOCATION2, minify: minify);
  Expect.isTrue(generated.contains(".$prefix\$2(1,${minify ? "" : " "}2)"));
}

// Make sure that the bailout version does not introduce a second version of
// the closure.
closureBailout(bool minify, String prefix) {
  asyncTest(() => compileAll(TEST_BAILOUT, minify: minify)
      .then((generated) {
    RegExp regexp = new RegExp("$prefix\\\$0:${minify ? "" : " "}function");
    Iterator<Match> matches = regexp.allMatches(generated).iterator;
    checkNumberOfMatches(matches, 1);
  }));
}

main() {
  closureInvocation(false, "call");
  closureInvocation(true, "");
  closureBailout(false, "call");
  closureBailout(true, "");
}