Update language tests to new optional parameter syntax and semantics.

tests/language/named_parameters_with_conversions_test.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 named arguments work as expected regardless of whether the function or
 // method is called via function call syntax or method call syntax.
 
 
 Validate(tag, a, b) {
   // tag encodes which parameters are passed in with values a: 111, b: 222.
@@ skipping 18 matching lines @@
 class HasMethod {
 
   int calls;
 
   HasMethod() : calls = 0 {}
 
   foo(tag, [a = 10, b = 20]) {
     calls += 1;
     Validate(tag, a, b);
   }
+
+  foo2(tag, {a: 10, b: 20}) {
+    calls += 1;
+    Validate(tag, a, b);
+  }
 }
 
 class HasField {
 
   int calls;
-  var foo;
+  var foo, foo2;
 
   HasField() {
     calls = 0;
     foo = makeFoo(this);
+    foo2 = makeFoo2(this);
   }
 
   makeFoo(owner) {
     // This function is closed-over 'owner'.
     return (tag, [a = 10, b = 20]) {
       owner.calls += 1;
       Validate(tag, a, b);
     };
   }
+
+  makeFoo2(owner) {
+    // This function is closed-over 'owner'.
+    return (tag, {a: 10, b: 20}) {
+      owner.calls += 1;
+      Validate(tag, a, b);
+    };
+  }
 }
 
 
 class NamedParametersWithConversionsTest {
 
   static checkException(thunk) {
     bool threw = false;
     try {
       thunk();
     } catch (e) {
       threw = true;
     }
     Expect.isTrue(threw);
   }
 
   static testMethodCallSyntax(a) {
     a.foo('');
     a.foo('a', 111);
     a.foo('ab', 111, 222);
-    a.foo('a', a: 111);
-    a.foo('b', b: 222);
-    a.foo('ab', a: 111, b: 222);
-    a.foo('ab', b: 222, a: 111);
+    a.foo2('a', a: 111);
+    a.foo2('b', b: 222);
+    a.foo2('ab', a: 111, b: 222);
+    a.foo2('ab', b: 222, a: 111);
 
     Expect.equals(7, a.calls);
 
     checkException(() => a.foo());                 // Too few arguments.
     checkException(() => a.foo('abc', 1, 2, 3));   // Too many arguments.
-    checkException(() => a.foo('c', c: 1));        // Bad name.
+    checkException(() => a.foo2('c', c: 1));        // Bad name.
 
     Expect.equals(7, a.calls);
   }
 
   static testFunctionCallSyntax(a) {
     var f = a.foo;
+    var f2 = a.foo2;
     f('');
     f('a', 111);
     f('ab', 111, 222);
-    f('a', a: 111);
-    f('b', b: 222);
-    f('ab', a: 111, b: 222);
-    f('ab', b: 222, a: 111);
+    f2('a', a: 111);
+    f2('b', b: 222);
+    f2('ab', a: 111, b: 222);
+    f2('ab', b: 222, a: 111);
 
     Expect.equals(7, a.calls);
 
     checkException(() => f());                 // Too few arguments.
     checkException(() => f('abc', 1, 2, 3));   // Too many arguments.
-    checkException(() => f('c', c: 1));        // Bad name.
+    checkException(() => f2('c', c: 1));        // Bad name.
 
     Expect.equals(7, a.calls);
   }
 
   static testMain() {
     // 'Plain' calls where the method/field syntax matches the object.
     testMethodCallSyntax(new HasMethod());
     testFunctionCallSyntax(new HasField());
 
     // 'Conversion' calls where method/field call syntax does not match the
     // object.
     testMethodCallSyntax(new HasField());
     testFunctionCallSyntax(new HasMethod());
   }
 }
 
 main() {
   NamedParametersWithConversionsTest.testMain();
 }