Better diagnostic of tests.

test/mjsunit/array-splice.js

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 13 matching lines @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Check that splicing array of holes keeps it as array of holes
 (function() {
   for (var i = 0; i < 7; i++) {
     var array = new Array(10);
     var spliced = array.splice(1, 1, 'one', 'two');
     assertEquals(1, spliced.length);
-    assertFalse(0 in spliced);
+    assertFalse(0 in spliced, "0 in spliced");
 
     assertEquals(11, array.length);
-    assertFalse(0 in array);
+    assertFalse(0 in array, "0 in array");
     assertTrue(1 in array);
     assertTrue(2 in array);
-    assertFalse(3 in array);
+    assertFalse(3 in array, "3 in array");
   }
 })();
 
 
 // Check various variants of empty array's splicing.
 (function() {
   for (var i = 0; i < 7; i++) {
     assertEquals([], [].splice(0, 0));
     assertEquals([], [].splice(1, 0));
     assertEquals([], [].splice(0, 1));
@@ skipping 212 matching lines @@
     // Second hole (at index 3) of array turns into
     // value of Array.prototype[3] while copying.
     assertEquals([, at3], spliced);
     assertEquals([, , 'one', undefined, 'two', , , at7, at7, ,], array);
 
     // ... but array[7] is actually a hole:
     assertTrue(delete Array.prototype[7]);
     assertEquals(undefined, array[7]);
 
     // and now check hasOwnProperty
-    assertFalse(array.hasOwnProperty(0));
-    assertFalse(array.hasOwnProperty(1));
+    assertFalse(array.hasOwnProperty(0), "array.hasOwnProperty(0)");
+    assertFalse(array.hasOwnProperty(1), "array.hasOwnProperty(1)");
     assertTrue(array.hasOwnProperty(2));
     assertTrue(array.hasOwnProperty(3));
     assertTrue(array.hasOwnProperty(4));
-    assertFalse(array.hasOwnProperty(5));
-    assertFalse(array.hasOwnProperty(6));
-    assertFalse(array.hasOwnProperty(7));
+    assertFalse(array.hasOwnProperty(5), "array.hasOwnProperty(5)");
+    assertFalse(array.hasOwnProperty(6), "array.hasOwnProperty(6)");
+    assertFalse(array.hasOwnProperty(7), "array.hasOwnProperty(7)");
     assertTrue(array.hasOwnProperty(8));
-    assertFalse(array.hasOwnProperty(9));
+    assertFalse(array.hasOwnProperty(9), "array.hasOwnProperty(9)");
 
     // and now check couple of indices above length.
-    assertFalse(array.hasOwnProperty(10));
-    assertFalse(array.hasOwnProperty(15));
-    assertFalse(array.hasOwnProperty(31));
-    assertFalse(array.hasOwnProperty(63));
-    assertFalse(array.hasOwnProperty(2 << 32 - 1));
+    assertFalse(array.hasOwnProperty(10), "array.hasOwnProperty(10)");
+    assertFalse(array.hasOwnProperty(15), "array.hasOwnProperty(15)");
+    assertFalse(array.hasOwnProperty(31), "array.hasOwnProperty(31)");
+    assertFalse(array.hasOwnProperty(63), "array.hasOwnProperty(63)");
+    assertFalse(array.hasOwnProperty(2 << 32 - 1), "array.hasOwnProperty(2 << 31 - 1)");
   }
 })();
 
 
 // Check the behaviour when approaching maximal values for length.
 (function() {
   for (var i = 0; i < 7; i++) {
     try {
       new Array((1 << 32) - 3).splice(-1, 0, 1, 2, 3, 4, 5);
       throw 'Should have thrown RangeError';
     } catch (e) {
       assertTrue(e instanceof RangeError);
     }
 
     // Check smi boundary
     var bigNum = (1 << 30) - 3;
     var array = new Array(bigNum);
     array.splice(-1, 0, 1, 2, 3, 4, 5, 6, 7);
     assertEquals(bigNum + 7, array.length);
   }
 })();
 
 (function() {
   for (var i = 0; i < 7; i++) {
     var a = [7, 8, 9];
     a.splice(0, 0, 1, 2, 3, 4, 5, 6);
     assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9], a);
-    assertFalse(a.hasOwnProperty(10));
+    assertFalse(a.hasOwnProperty(10), "a.hasOwnProperty(10)");
     assertEquals(undefined, a[10]);
   }
 })();