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28 // Flags: --expose-externalize-string --expose-gc
29 // Test data pointer caching of external strings.
32 // Test string.charAt.
33 var charat_str = new Array(5);
34 charat_str[0] = "0123456789ABCDEF0123456789ABCDEF\
35 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
36 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
37 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
38 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF";
39 charat_str[1] = "0123456789ABCDEF";
40 for (var i = 0; i < 6; i++) charat_str[1] += charat_str[1];
41 try { // String can only be externalized once
42 externalizeString(charat_str[0], false);
43 externalizeString(charat_str[1], true);
45 charat_str[2] = charat_str[0].slice(0, -1);
46 charat_str[3] = charat_str[1].slice(0, -1);
47 charat_str[4] = charat_str[0] + charat_str[0];
49 for (var i = 0; i < 5; i++) {
50 assertEquals('B', charat_str[i].charAt(6*16 + 11));
51 assertEquals('C', charat_str[i].charAt(6*16 + 12));
52 assertEquals('A', charat_str[i].charAt(3*16 + 10));
53 assertEquals('B', charat_str[i].charAt(3*16 + 11));
57 try { // String can only be externalized once
58 externalizeString(charat_short, true);
60 assertEquals("1", charat_short.charAt(1));
62 // Test regexp and short substring.
64 var rere = /(T.{1,2}B)/;
65 var ascii = "ABCDEFGHIJKLMNOPQRST";
66 var twobyte = "_ABCDEFGHIJKLMNOPQRST";
68 externalizeString(ascii, false);
69 externalizeString(twobyte, true);
71 assertTrue(isOneByteString(ascii));
72 assertFalse(isOneByteString(twobyte));
73 var ascii_slice = ascii.slice(1,-1);
74 var twobyte_slice = twobyte.slice(2,-1);
75 var ascii_cons = ascii + ascii;
76 var twobyte_cons = twobyte + twobyte;
77 for (var i = 0; i < 2; i++) {
78 assertEquals(["A", "A"], re.exec(ascii));
79 assertEquals(["B", "B"], re.exec(ascii_slice));
80 assertEquals(["TAB", "TAB"], rere.exec(ascii_cons));
81 assertEquals(["A", "A"], re.exec(twobyte));
82 assertEquals(["B", "B"], re.exec(twobyte_slice));
83 assertEquals(["T_AB", "T_AB"], rere.exec(twobyte_cons));
84 assertEquals("DEFG", ascii_slice.substr(2, 4));
85 assertEquals("DEFG", twobyte_slice.substr(2, 4));
86 assertEquals("DEFG", ascii_cons.substr(3, 4));
87 assertEquals("DEFG", twobyte_cons.substr(4, 4));
90 // Test adding external strings
91 var short_ascii = "E=";
92 var long_ascii = "MCsquared";
93 var short_twobyte = "E\u1234";
94 var long_twobyte = "MCsquare\u1234";
95 try { // String can only be externalized once
96 externalizeString(short_ascii, false);
97 externalizeString(long_ascii, false);
98 externalizeString(short_twobyte, true);
99 externalizeString(long_twobyte, true);
100 assertTrue(isOneByteString(short_asii) && isOneByteString(long_ascii));
101 assertFalse(isOneByteString(short_twobyte) || isOneByteString(long_twobyte));
103 assertEquals("E=MCsquared", short_ascii + long_ascii);
104 assertTrue(isOneByteString(short_ascii + long_ascii));
105 assertEquals("MCsquaredE=", long_ascii + short_ascii);
106 assertEquals("E\u1234MCsquare\u1234", short_twobyte + long_twobyte);
107 assertFalse(isOneByteString(short_twobyte + long_twobyte));
108 assertEquals("E=MCsquared", "E=" + long_ascii);
109 assertEquals("E\u1234MCsquared", short_twobyte + "MCsquared");
110 assertEquals("E\u1234MCsquared", short_twobyte + long_ascii);
111 assertFalse(isOneByteString(short_twobyte + long_ascii));
114 // Run the test many times to ensure IC-s don't break things.
115 for (var i = 0; i < 10; i++) {
119 // Clean up string to make Valgrind happy.