Cleanup of mjsunit.js code and make assertEquals more strict.

test/mjsunit/regress/regress-176.js

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 // See http://code.google.com/p/v8/issues/detail?id=176
 
-assertEquals("f,",
-             "foo".match(/(?:(?=(f)o))?f/).toString(),
-             "zero length match in (?:) with capture in lookahead");
-assertEquals("f,",
-             "foo".match(/(?=(f)o)?f/).toString(),
-             "zero length match in (?=) with capture in lookahead");
-assertEquals("fo,f",
-             "foo".match(/(?:(?=(f)o)f)?o/),
-             "non-zero length match with capture in lookahead");
-assertEquals("fo,f",
-             "foo".match(/(?:(?=(f)o)f?)?o/),
-             "non-zero length match with greedy ? in (?:)");
-assertEquals("fo,f",
-             "foo".match(/(?:(?=(f)o)f??)?o/),
-             "non-zero length match with non-greedy ? in (?:), o forces backtrack");
-assertEquals("fo,f",
-             "foo".match(/(?:(?=(f)o)f??)?./),
-             "non-zero length match with non-greedy ? in (?:), zero length match causes backtrack");
-assertEquals("f,",
-             "foo".match(/(?:(?=(f)o)fx)?./),
-             "x causes backtrack inside (?:)");
+assertArrayEquals(["f", undefined],

[Søren Thygesen Gjesse, 2011/04/15 10:20:51]

void 0 instead of undefined (times 3)?

[Lasse Reichstein, 2011/04/15 11:33:54]

Not necessaary.

+                  "foo".match(/(?:(?=(f)o))?f/),
+                  "zero length match in (?:) with capture in lookahead");
+assertArrayEquals(["f", undefined],
+                  "foo".match(/(?=(f)o)?f/),
+                  "zero length match in (?=) with capture in lookahead");
+assertArrayEquals(["fo", "f"],
+                  "foo".match(/(?:(?=(f)o)f)?o/),
+                  "non-zero length match with capture in lookahead");
+assertArrayEquals(["fo", "f"],
+                  "foo".match(/(?:(?=(f)o)f?)?o/),
+                  "non-zero length match with greedy ? in (?:)");
+assertArrayEquals(["fo", "f"],
+                  "foo".match(/(?:(?=(f)o)f??)?o/),
+                  "non-zero length match with non-greedy ? in (?:), o forces backtrack");
+assertArrayEquals(["fo", "f"],
+                  "foo".match(/(?:(?=(f)o)f??)?./),
+                  "non-zero length match with non-greedy ? in (?:), zero length match causes backtrack");
+assertArrayEquals(["f", undefined],
+                  "foo".match(/(?:(?=(f)o)fx)?./),
+                  "x causes backtrack inside (?:)");