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| 1 // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // Flags: --harmony-string-padding |
| 6 |
| 7 (function TestMeta() { |
| 8 assertEquals(1, String.prototype.padEnd.length); |
| 9 assertEquals("function", typeof String.prototype.padEnd); |
| 10 assertEquals(Object.getPrototypeOf(Function), |
| 11 Object.getPrototypeOf(String.prototype.padEnd)); |
| 12 assertEquals("padEnd", String.prototype.padEnd.name); |
| 13 |
| 14 var desc = Object.getOwnPropertyDescriptor(String.prototype, "padEnd"); |
| 15 assertFalse(desc.enumerable); |
| 16 assertTrue(desc.configurable); |
| 17 assertTrue(desc.writable); |
| 18 assertEquals(undefined, desc.get); |
| 19 assertEquals(undefined, desc.set); |
| 20 |
| 21 assertThrows(() => new Function(`${String.prototype.padEnd}`), SyntaxError); |
| 22 })(); |
| 23 |
| 24 |
| 25 (function TestRequireObjectCoercible() { |
| 26 var padEnd = String.prototype.padEnd; |
| 27 assertThrows(() => padEnd.call(null, 4, "test"), TypeError); |
| 28 assertThrows(() => padEnd.call(undefined, 4, "test"), TypeError); |
| 29 assertEquals("123 ", padEnd.call({ |
| 30 __proto__: null, |
| 31 valueOf() { return 123; } |
| 32 }, 6, " ")); |
| 33 |
| 34 var proxy = new Proxy({}, { |
| 35 get(t, name) { |
| 36 if (name === Symbol.toPrimitive || name === "toString") return; |
| 37 if (name === "valueOf") return () => 6.7; |
| 38 assertUnreachable(); |
| 39 } |
| 40 }); |
| 41 assertEquals("6.7 ", padEnd.call(proxy, 6, " ")); |
| 42 |
| 43 proxy = new Proxy({}, { |
| 44 get(t, name) { |
| 45 if (name === Symbol.toPrimitive || name === "valueOf") return; |
| 46 if (name === "toString") return () => 6.7; |
| 47 assertUnreachable(); |
| 48 } |
| 49 }); |
| 50 assertEquals("6.7 ", padEnd.call(proxy, 6, " ")); |
| 51 })(); |
| 52 |
| 53 |
| 54 (function TestToLength() { |
| 55 assertThrows(() => "123".padEnd(Symbol("16")), TypeError); |
| 56 assertEquals("123", "123".padEnd(-1)); |
| 57 assertEquals("123", "123".padEnd({ toString() { return -1; } })); |
| 58 assertEquals("123", "123".padEnd(-0)); |
| 59 assertEquals("123", "123".padEnd({ toString() { return -0; } })); |
| 60 assertEquals("123", "123".padEnd(+0)); |
| 61 assertEquals("123", "123".padEnd({ toString() { return +0; } })); |
| 62 assertEquals("123", "123".padEnd(NaN)); |
| 63 assertEquals("123", "123".padEnd({ toString() { return NaN; } })); |
| 64 })(); |
| 65 |
| 66 |
| 67 (function TestFillerToString() { |
| 68 assertEquals(". ", ".".padEnd(10)); |
| 69 assertEquals(". ", ".".padEnd(10, undefined)); |
| 70 assertEquals(". ", ".".padEnd(10, { toString() { return ""; } })); |
| 71 assertEquals(".nullnulln", ".".padEnd(10, null)); |
| 72 })(); |
| 73 |
| 74 |
| 75 (function TestFillerRepetition() { |
| 76 for (var i = 2000; i > 0; --i) { |
| 77 var expected = "123" + "xoxo".repeat(i / 4).slice(0, i - 3); |
| 78 var actual = "123".padEnd(i, "xoxo"); |
| 79 assertEquals(expected, actual); |
| 80 assertEquals(i > "123".length ? i : 3, actual.length); |
| 81 } |
| 82 })(); |
| 83 |
| 84 |
| 85 (function TestTruncation() { |
| 86 assertEquals("ab", "a".padEnd(2, "bc")); |
| 87 })(); |
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