blob: 9174379a336fc1091d7e78682b480bed1a264464 [file] [log] [blame]
description("This test checks String.prototype.repeat.");
shouldBe('String.prototype.repeat.length', '1');
shouldBeEqualToString('String.prototype.repeat.name', 'repeat');
shouldBe('Object.getOwnPropertyDescriptor(String.prototype, "repeat").configurable', 'true');
shouldBe('Object.getOwnPropertyDescriptor(String.prototype, "repeat").enumerable', 'false');
shouldBe('Object.getOwnPropertyDescriptor(String.prototype, "repeat").writable', 'true');
shouldBe('Object.getOwnPropertyDescriptor(String.prototype, "repeat").get', 'undefined');
shouldBe('Object.getOwnPropertyDescriptor(String.prototype, "repeat").set', 'undefined');
shouldBe('Object.getOwnPropertyDescriptor(String.prototype, "repeat").value', 'String.prototype.repeat');
shouldBe("'foo bar'.repeat(+0)", "''");
shouldBe("'foo bar'.repeat(-0)", "''");
shouldBe("'foo bar'.repeat(1)", "'foo bar'");
shouldBe("'foo bar'.repeat(2)", "'foo barfoo bar'");
shouldBe("'フーバー'.repeat(0)", "''");
shouldBe("'フーバー'.repeat(1)", "'フーバー'");
shouldBe("'フーバー'.repeat(2)", "'フーバーフーバー'");
shouldBe("'foo barfoo bar'.repeat(2)", "'foo barfoo barfoo barfoo bar'");
shouldBe("'foo barfoo bar'.repeat(2.2)", "'foo barfoo barfoo barfoo bar'");
shouldBe("'foo barfoo bar'.repeat(2.8)", "'foo barfoo barfoo barfoo bar'");
shouldBe("'foo'.repeat(3.1)", "'foofoofoo'");
shouldBe("'foo'.repeat('2')", "'foofoo'");
shouldBe("'foo'.repeat(NaN)", "''");
shouldBe("'foo'.repeat(null)", "''");
shouldBe("'foo'.repeat(true)", "'foo'");
shouldBe("'foo'.repeat(false)", "''");
shouldBe("'foo'.repeat(undefined)", "''");
shouldBe("'foo'.repeat()", "''");
shouldBe("'f'.repeat(0)", "''");
shouldBe("'f'.repeat(1)", "'f'");
shouldBe("'f'.repeat(10)", "'ffffffffff'");
shouldBe("'フ'.repeat(0)", "''");
shouldBe("'フ'.repeat(1)", "'フ'");
shouldBe("'フ'.repeat(2)", "'フフ'");
// Repeat empty strings.
shouldBe("''.repeat(1000)", "''");
shouldBe("''.repeat(0xFFFFFFFF)", "''");
shouldBe("''.repeat(0xFFFFFFFF + 1)", "''");
// Check range errors.
shouldThrow("'x'.repeat(-1)", "'RangeError: String.prototype.repeat argument must be greater than or equal to 0 and not be Infinity'");
shouldThrow("'x'.repeat(Infinity)", "'RangeError: String.prototype.repeat argument must be greater than or equal to 0 and not be Infinity'");
shouldThrow("'x'.repeat(-Infinity)", "'RangeError: String.prototype.repeat argument must be greater than or equal to 0 and not be Infinity'");
shouldThrow("'foo bar'.repeat(-1)", "'RangeError: String.prototype.repeat argument must be greater than or equal to 0 and not be Infinity'");
shouldThrow("'foo bar'.repeat(Infinity)", "'RangeError: String.prototype.repeat argument must be greater than or equal to 0 and not be Infinity'");
shouldThrow("'foo bar'.repeat(-Infinity)", "'RangeError: String.prototype.repeat argument must be greater than or equal to 0 and not be Infinity'");
// Check out of memory errors.
shouldThrow("'f'.repeat(0xFFFFFFFF)", "'Error: Out of memory'");
shouldThrow("'f'.repeat(0xFFFFFFFF + 1)", "'Error: Out of memory'");
shouldThrow("'foo'.repeat(0xFFFFFFFFF)", "'Error: Out of memory'");
shouldThrow("'foo'.repeat(0xFFFFFFFFF + 1)", "'Error: Out of memory'");
shouldThrow("'foo bar'.repeat(0xFFFFFFFF)", "'Error: Out of memory'");
shouldThrow("'foo bar'.repeat(0xFFFFFFFF + 1)", "'Error: Out of memory'");
var sideEffect, stringRepeated, count;
function checkSideEffects(str) {
// Check side effects in repeat.
sideEffect = "";
stringRepeated = new String(str);
stringRepeated.toString = function() {
sideEffect += "A";
return this;
}
count = new Number(2);
count.valueOf = function() {
sideEffect += "B";
return this;
}
// Calling stringRepeated.repeat implicitly calls stringRepeated.toString(),
// and count.valueOf(), in that respective order.
shouldBe("stringRepeated.repeat(count)", "'" + str + str + "'");
shouldBe("sideEffect == 'AB'", "true");
// If stringRepeated.toString() throws an exception count.valueOf() is not called.
stringRepeated.toString = function() {
throw "error";
}
sideEffect = "";
shouldThrow("stringRepeated.repeat(count)", "'error'");
shouldBe("sideEffect == ''", "true");
// If count throws an exception stringRepeated.toString() was called.
stringRepeated.toString = function() {
sideEffect += "A";
return this;
}
count.valueOf = function() {
throw "error";
}
sideEffect = "";
shouldThrow("stringRepeated.repeat(count)", "'error'");
shouldBe("sideEffect == 'A'", "true");
}
// Fast path for single character string.
checkSideEffects("x");
// Slow path for any other string.
checkSideEffects("foo bar");