Rewrite two tests to multi-tests

tests/language/positional_parameters_type_test.dart

Index: tests/language/positional_parameters_type_test.dart
diff --git a/tests/language/positional_parameters_type_test.dart b/tests/language/positional_parameters_type_test.dart
index 6c3c77d06d1102c43a2ff054dc3ca9e58508324b..7d14403dbd84d5830f1d56c5f033253c61f1a6b9 100644
--- a/tests/language/positional_parameters_type_test.dart
+++ b/tests/language/positional_parameters_type_test.dart
@@ -1,57 +1,23 @@
 // 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.
-// VMOptions=--enable_type_checks
+// VMOptions=--checked
 //
 // Dart test program for testing optional positional parameters in type tests.
 
-import "package:expect/expect.dart";
-
-class NamedParametersTypeTest {
-  static int testMain() {
-    int result = 0;
-    Function anyFunction;
-    void acceptFunNumOptBool(void funNumOptBool(num n, [bool b])) { };
-    void funNum(num n) { };
-    void funNumBool(num n, bool b) { };
-    void funNumOptBool(num n, [bool b = true]) { };
-    void funNumOptBoolX(num n, [bool x = true]) { };
-    anyFunction = funNum;  // No error.
-    anyFunction = funNumBool;  // No error.
-    anyFunction = funNumOptBool;  // No error.
-    anyFunction = funNumOptBoolX;  // No error.
-    acceptFunNumOptBool(funNumOptBool);  // No error.
-    try {
-      acceptFunNumOptBool(funNum);  // No static type warning.
-    } on TypeError catch (error) {
-      result += 1;
-      var msg = error.toString();
-      Expect.isTrue(msg.contains("'(num, [bool]) => void'"));  // dstType
-      Expect.isTrue(msg.contains("'(num) => void'"));  // srcType
-      Expect.isTrue(msg.contains("'funNumOptBool'"));  // dstName
-      Expect.isTrue(error.stackTrace.toString().contains(
-          "positional_parameters_type_test.dart:14:35"));
-    }
-    try {
-      acceptFunNumOptBool(funNumBool);  /// static type warning
-    } on TypeError catch (error) {
-      result += 10;
-      var msg = error.toString();
-      Expect.isTrue(msg.contains("'(num, [bool]) => void'"));  // dstType
-      Expect.isTrue(msg.contains("'(num, bool) => void'"));  // srcType
-      Expect.isTrue(msg.contains("'funNumOptBool'"));  // dstName
-      Expect.isTrue(error.stackTrace.toString().contains(
-          "positional_parameters_type_test.dart:14:35"));
-    }
-    try {
-      acceptFunNumOptBool(funNumOptBoolX);  // No static type warning.
-    } on TypeError catch (error) {
-      result += 100;
-    }
-    return result;
-  }
-}
-
 main() {
-  Expect.equals(11, NamedParametersTypeTest.testMain());
+  Function anyFunction;
+  void acceptFunNumOptBool(void funNumOptBool(num n, [bool b])) { };
+  void funNum(num n) { };
+  void funNumBool(num n, bool b) { };
+  void funNumOptBool(num n, [bool b = true]) { };
+  void funNumOptBoolX(num n, [bool x = true]) { };
+  anyFunction = funNum;
+  anyFunction = funNumBool;
+  anyFunction = funNumOptBool;
+  anyFunction = funNumOptBoolX;
+  acceptFunNumOptBool(funNumOptBool);
+  acceptFunNumOptBool(funNumOptBoolX);
+  acceptFunNumOptBool(funNum);  /// 01: runtime error
+  acceptFunNumOptBool(funNumBool);  /// 02: static type warning, runtime error
 }