Test for named arguments with tricky (for frog) names.

tests/language/src/NamedParametersWithDollarsTest.dart

+// Copyright (c) 2011, 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 to stress Frog's named parameter scheme.
+
+main() {
+  //testDollar();
+  testPsycho();
+}
+
+class TestClass {
+  method([a, b, a$b, a$$b]) => [a, b, a$b, a$$b];
+
+  psycho([$, $$, $$$, $$$$]) => [$, $$, $$$, $$$$];
+}
+globalMethod([a, b, a$b, a$$b]) => [a, b, a$b, a$$b];
+
+
+format(thing) {
+  if (thing == null) return '-';
+  if (thing is List) {
+    var fragments = ['['];
+    var sep;
+    for (final item in thing) {
+      if (sep != null) fragments.add(sep);
+      sep = ', ';
+      fragments.add(format(item));
+    }
+    fragments.add(']');
+    return Strings.concatAll(fragments);
+  }
+  return thing.toString();
+}
+
+// Hopefully inscrutable to static analysis.
+makeTestClass(n) => [new TestClass(), new Decoy(), 'string'][n % 3];
+
+class Decoy {
+  method([a$b, b, a]) { throw const NotImplementedException(); }
+  psycho([$$$, $$, $])  { throw const NotImplementedException(); }
+}
+
+testDollar() {
+  Expect.equals('[]', format([]));
+
+  Expect.equals('[-, -, -, -]', format(globalMethod()));
+  Expect.equals('[1, 2, -, -]', format(globalMethod(a: 1, b: 2)));
+  Expect.equals('[1, 2, -, -]', format(globalMethod(b: 2, a: 1)));
+  Expect.equals('[-, -, 3, -]', format(globalMethod(a$b: 3)));
+  Expect.equals('[-, -, -, 4]', format(globalMethod(a$$b: 4)));
+
+  TestClass t = new TestClass();  // Statically typed.
+
+  Expect.equals('[-, -, -, -]', format(t.method()));
+  Expect.equals('[1, 2, -, -]', format(t.method(a: 1, b: 2)));
+  Expect.equals('[1, 2, -, -]', format(t.method(b: 2, a: 1)));
+  Expect.equals('[-, -, 3, -]', format(t.method(a$b: 3)));
+  Expect.equals('[-, -, -, 4]', format(t.method(a$$b: 4)));
+
+  var obj = makeTestClass(0);
+
+  Expect.equals('[-, -, -, -]', format(obj.method()));
+  Expect.equals('[1, 2, -, -]', format(obj.method(a: 1, b: 2)));
+  Expect.equals('[1, 2, -, -]', format(obj.method(b: 2, a: 1)));
+  Expect.equals('[-, -, 3, -]', format(obj.method(a$b: 3)));
+  Expect.equals('[-, -, -, 4]', format(obj.method(a$$b: 4)));
+}
+
+testPsycho() {
+  TestClass t = new TestClass();  // Statically typed.
+
+  Expect.equals('[1, 2, 3, -]', format(t.psycho($:1, $$:2, $$$:3)));
+  Expect.equals('[1, 2, 3, -]', format(t.psycho($$$:3, $$:2, $:1)));
+  Expect.equals('[1, 2, -, -]', format(t.psycho($:1, $$:2)));
+  Expect.equals('[-, -, -, 4]', format(t.psycho($$$$: 4)));
+
+  var obj = makeTestClass(0);
+
+  Expect.equals('[1, 2, -, -]', format(obj.psycho($:1, $$:2)));
+  Expect.equals('[-, -, -, 4]', format(obj.psycho($$$$: 4)));
+  Expect.equals('[1, 2, 3, -]', format(obj.psycho($:1, $$:2, $$$:3)));
+  Expect.equals('[1, 2, 3, -]', format(obj.psycho($$$:3, $$:2, $:1)));
+}