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3 // modification, are permitted provided that the following conditions are
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28 // Flags: --expose-externalize-string --expose-gc
35 // Build an ascii cons string.
36 for (var i = 0; i < size; i++) {
37 str += String.fromCharCode(i & 0x7f);
39 assertTrue(isAsciiString(str));
41 var twoByteExternalWithAsciiData =
42 "AA" + (function() { return "A"; })();
43 externalizeString(twoByteExternalWithAsciiData, true /* force two-byte */);
44 assertFalse(isAsciiString(twoByteExternalWithAsciiData));
46 var realTwoByteExternalString =
47 "\u1234\u1234\u1234\u1234" + (function() { return "\u1234"; })();
48 externalizeString(realTwoByteExternalString);
49 assertFalse(isAsciiString(realTwoByteExternalString));
51 assertTrue(isAsciiString(["a", twoByteExternalWithAsciiData].join("")));
53 // Appending a two-byte string that contains only ascii chars should
54 // still produce an ascii cons.
55 var str1 = str + twoByteExternalWithAsciiData;
56 assertTrue(isAsciiString(str1));
58 // Force flattening of the string.
59 var old_length = str1.length - twoByteExternalWithAsciiData.length;
60 for (var i = 0; i < old_length; i++) {
61 assertEquals(String.fromCharCode(i & 0x7f), str1[i]);
63 for (var i = old_length; i < str1.length; i++) {
64 assertEquals("A", str1[i]);
67 // Flattened string should still be ascii.
68 assertTrue(isAsciiString(str1));
70 // Lower-casing an ascii string should produce ascii.
71 assertTrue(isAsciiString(str1.toLowerCase()));
73 assertFalse(isAsciiString(["a", realTwoByteExternalString].join("")));
75 // Appending a real two-byte string should produce a two-byte cons.
76 var str2 = str + realTwoByteExternalString;
77 assertFalse(isAsciiString(str2));
79 // Force flattening of the string.
80 old_length = str2.length - realTwoByteExternalString.length;
81 for (var i = 0; i < old_length; i++) {
82 assertEquals(String.fromCharCode(i & 0x7f), str2[i]);
84 for (var i = old_length; i < str.length; i++) {
85 assertEquals("\u1234", str2[i]);
88 // Flattened string should still be two-byte.
89 assertFalse(isAsciiString(str2));
92 // Run the test many times to ensure IC-s don't break things.
93 for (var i = 0; i < 10; i++) {
97 // Clean up string to make Valgrind happy.