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42 ECMA Section: 15.5.1 The String Constructor called as a Function
43 15.5.1.1 String(value)
46 Description: When String is called as a function rather than as
47 a constructor, it performs a type conversion.
48 - String(value) returns a string value (not a String
49 object) computed by ToString(value)
50 - String() returns the empty string ""
52 Author: christine@netscape.com
56 var SECTION = "15.5.1";
57 var VERSION = "ECMA_1";
59 var TITLE = "The String Constructor Called as a Function";
61 writeHeaderToLog( SECTION + " "+ TITLE);
63 new TestCase( SECTION, "String('string primitive')", "string primitive", String('string primitive') );
64 new TestCase( SECTION, "String(void 0)", "undefined", String( void 0) );
65 new TestCase( SECTION, "String(null)", "null", String( null ) );
66 new TestCase( SECTION, "String(true)", "true", String( true) );
67 new TestCase( SECTION, "String(false)", "false", String( false ) );
68 new TestCase( SECTION, "String(Boolean(true))", "true", String(Boolean(true)) );
69 new TestCase( SECTION, "String(Boolean(false))", "false", String(Boolean(false)) );
70 new TestCase( SECTION, "String(Boolean())", "false", String(Boolean(false)) );
71 new TestCase( SECTION, "String(new Array())", "", String( new Array()) );
72 new TestCase( SECTION, "String(new Array(1,2,3))", "1,2,3", String( new Array(1,2,3)) );
75 new TestCase( SECTION, "String( Number.NaN )", "NaN", String( Number.NaN ) );
76 new TestCase( SECTION, "String( 0 )", "0", String( 0 ) );
77 new TestCase( SECTION, "String( -0 )", "0", String( -0 ) );
78 new TestCase( SECTION, "String( Number.POSITIVE_INFINITY )", "Infinity", String( Number.POSITIVE_INFINITY ) );
79 new TestCase( SECTION, "String( Number.NEGATIVE_INFINITY )", "-Infinity", String( Number.NEGATIVE_INFINITY ) );
80 new TestCase( SECTION, "String( -1 )", "-1", String( -1 ) );
82 // cases in step 6: integers 1e21 > x >= 1 or -1 >= x > -1e21
84 new TestCase( SECTION, "String( 1 )", "1", String( 1 ) );
85 new TestCase( SECTION, "String( 10 )", "10", String( 10 ) );
86 new TestCase( SECTION, "String( 100 )", "100", String( 100 ) );
87 new TestCase( SECTION, "String( 1000 )", "1000", String( 1000 ) );
88 new TestCase( SECTION, "String( 10000 )", "10000", String( 10000 ) );
89 new TestCase( SECTION, "String( 10000000000 )", "10000000000", String( 10000000000 ) );
90 new TestCase( SECTION, "String( 10000000000000000000 )", "10000000000000000000", String( 10000000000000000000 ) );
91 new TestCase( SECTION, "String( 100000000000000000000 )","100000000000000000000",String( 100000000000000000000 ) );
93 new TestCase( SECTION, "String( 12345 )", "12345", String( 12345 ) );
94 new TestCase( SECTION, "String( 1234567890 )", "1234567890", String( 1234567890 ) );
96 new TestCase( SECTION, "String( -1 )", "-1", String( -1 ) );
97 new TestCase( SECTION, "String( -10 )", "-10", String( -10 ) );
98 new TestCase( SECTION, "String( -100 )", "-100", String( -100 ) );
99 new TestCase( SECTION, "String( -1000 )", "-1000", String( -1000 ) );
100 new TestCase( SECTION, "String( -1000000000 )", "-1000000000", String( -1000000000 ) );
101 new TestCase( SECTION, "String( -1000000000000000 )", "-1000000000000000", String( -1000000000000000 ) );
102 new TestCase( SECTION, "String( -100000000000000000000 )", "-100000000000000000000", String( -100000000000000000000 ) );
103 new TestCase( SECTION, "String( -1000000000000000000000 )", "-1e+21", String( -1000000000000000000000 ) );
105 new TestCase( SECTION, "String( -12345 )", "-12345", String( -12345 ) );
106 new TestCase( SECTION, "String( -1234567890 )", "-1234567890", String( -1234567890 ) );
108 // cases in step 7: numbers with a fractional component, 1e21> x >1 or -1 > x > -1e21,
109 new TestCase( SECTION, "String( 1.0000001 )", "1.0000001", String( 1.0000001 ) );
112 // cases in step 8: fractions between 1 > x > -1, exclusive of 0 and -0
114 // cases in step 9: numbers with 1 significant digit >= 1e+21 or <= 1e-6
116 new TestCase( SECTION, "String( 1000000000000000000000 )", "1e+21", String( 1000000000000000000000 ) );
117 new TestCase( SECTION, "String( 10000000000000000000000 )", "1e+22", String( 10000000000000000000000 ) );
119 // cases in step 10: numbers with more than 1 significant digit >= 1e+21 or <= 1e-6
120 new TestCase( SECTION, "String( 1.2345 )", "1.2345", String( 1.2345));
121 new TestCase( SECTION, "String( 1.234567890 )", "1.23456789", String( 1.234567890 ));
123 new TestCase( SECTION, "String( .12345 )", "0.12345", String(.12345 ) );
124 new TestCase( SECTION, "String( .012345 )", "0.012345", String(.012345) );
125 new TestCase( SECTION, "String( .0012345 )", "0.0012345", String(.0012345) );
126 new TestCase( SECTION, "String( .00012345 )", "0.00012345", String(.00012345) );
127 new TestCase( SECTION, "String( .000012345 )", "0.000012345", String(.000012345) );
128 new TestCase( SECTION, "String( .0000012345 )", "0.0000012345", String(.0000012345) );
129 new TestCase( SECTION, "String( .00000012345 )", "1.2345e-7", String(.00000012345));
131 new TestCase( "15.5.2", "String()", "", String() );