Expand ArithmeticTest to include truncate divide corner case and to trigger optimizing compiler.

language/src/ArithmeticTest.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.
 // Dart test program to test arithmetic operations.
 
 class ArithmeticTest {
 
   static bool exceptionCaughtParseInt(String s) {
     try {
       Math.parseInt(s);
@@ skipping 16 matching lines @@
     // No exception allowed for parse double.
     double d = Math.parseDouble(str);
     try {
       var a = d.toInt();
       return false;
     } catch (BadNumberFormatException e) {
       return true;
     }
   }
 
-  static testMain() {
+  static runOne() {
     var a = 22;
     var b = 4;
     // Smi & smi.
     Expect.equals(26, a + b);
     Expect.equals(18, a - b);
     Expect.equals(88, a * b);
     Expect.equals(5, a ~/ b);
     Expect.equals(5.5, a / b);
     Expect.equals(2.0, 10 / 5);
     Expect.equals(2, a % b);
     Expect.equals(2, a.remainder(b));
+    a = -(1 << 30);
+    b = -1;
+    // Smi corner cases.
+    Expect.equals(1 << 30, a ~/ b);

[regis, 2011/12/14 00:58:03]

You could already add a test for 62-bit Smi.

[sra1, 2011/12/14 01:05:25]

I would loop, 30 and 62 are not the only choices.

[srdjan, 2011/12/14 01:14:30]

Looping 1..80

     a = 22;
     b = 4.0;
     // Smi & double.
     Expect.equals(26.0, a + b);
     Expect.equals(18.0, a - b);
     Expect.equals(88.0, a * b);
     Expect.equals(5.0, a ~/ b);
     Expect.equals(5.5, a / b);
     Expect.equals(2.0, a % b);
     Expect.equals(2.0, a.remainder(b));
@@ skipping 322 matching lines @@
     Expect.equals(12.0, Math.max(1.0, 12.0));
     Expect.equals(false, 1.0 < Math.min(1.0, 12.0));
     Expect.equals(true, 1.0 < Math.max(1.0, 12.0));
 
     // Hashcode
     Expect.equals(false, (3.4).hashCode() == (1.2).hashCode());
     Expect.equals(true, (1.2).hashCode() == (1.2).hashCode());
     Expect.equals(false, (3).hashCode() == (1).hashCode());
     Expect.equals(true, (10).hashCode() == (10).hashCode());
   }
+
+  static testMain() {
+    for (int i = 0; i < 1500; i++) {
+      runOne();
+    }
+  }
 }
 
 main() {
   ArithmeticTest.testMain();
 }