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-rw-r--r-- | js/src/tests/non262/Tuple/prototype/concat/concat.js | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/js/src/tests/non262/Tuple/prototype/concat/concat.js b/js/src/tests/non262/Tuple/prototype/concat/concat.js new file mode 100644 index 0000000000..92270db7e9 --- /dev/null +++ b/js/src/tests/non262/Tuple/prototype/concat/concat.js @@ -0,0 +1,104 @@ +// |reftest| skip-if(!this.hasOwnProperty("Tuple")) +/* +8.2.3.6 Tuple.prototype.concat ( ...args ) + +When the concat method is called with zero or more arguments, it returns a Tuple containing the elements of the Tuple followed by the elements of each argument in order. + +The following steps are taken: + +1. Let T be ? thisTupleValue(this value). +2. Let list be a new empty List. +3. Let n be 0. +4. Let items be a List whose first element is T and whose subsequent element are, in left to right order, the arguments that were passed to this function invocation. +5. Repeat, while items is not empty, +a. Remove the first element from items and let E be the value of the element. +b. Let spreadable be ? IsConcatSpreadable(E). +c. If spreadable is true, then +i. Let k be 0. +ii. Let len be ? LengthOfArrayLike(E). +iii. If n + len > 253 - 1, throw a TypeError exception. +iv. Repeat, while k < len, +1. Let P be ! ToString(k). +2. Let exists be ? HasProperty(E, P). +3. If exists is true, then +a. Let subElement be ? Get(E, P). +b. If Type(subElement) is Object, throw a TypeError exception. +c. Append subElement to the end of list list. +4. Set n to n + 1. +5. Set k to k + 1. +d. Else, +i. NOTE: E is added as a single item rather than spread. +ii. If n ≥ 253 - 1, throw a TypeError exception. +iii. If Type(E) is Object, throw a TypeError exception. +iv. Append E to the end of list list. +v. Set n to n + 1. +6. Return a new Tuple value whose [[Sequence]] is list. +*/ + +/* Step 1 */ +/* concat() should throw on a non-Tuple */ +let method = Tuple.prototype.concat; +assertEq(method.call(#[1,2,3,4,5,6], #[1],#[2,3]), #[1,2,3,4,5,6,1,2,3]); +assertEq(method.call(Object(#[1,2,3,4,5,6]), #[1],#[2,3]), method.call(#[1,2,3,4,5,6],#[1],#[2,3])); +assertThrowsInstanceOf(() => method.call("monkeys"), TypeError, + "value of TupleObject must be a Tuple"); + +/* Step 5 */ +/* No arguments or empty arguments => returns this */ +let tup = #[1,2,3]; +assertEq(tup.concat(), tup); +assertEq(tup.concat(#[]), tup); +assertEq(tup.concat([]), tup); +assertEq(tup.concat(#[],#[],#[]), tup); + +/* Step 5 */ +/* 1 spreadable argument */ +assertEq(tup.concat(tup), #[1,2,3,1,2,3]); +assertEq(tup.concat([1,2,3]), #[1,2,3,1,2,3]); + +/* spreadable followed by non-spreadable */ +assertEq(tup.concat(tup, "monkeys"), #[1,2,3,1,2,3, "monkeys"]); +assertEq(tup.concat([1,2,3], "monkeys"), #[1,2,3,1,2,3, "monkeys"]); + +/* non-spreadable followed by spreadable */ +assertEq(tup.concat("monkeys", tup), #[1,2,3, "monkeys", 1,2,3]); +assertEq(tup.concat("monkeys", [1,2,3]), #[1,2,3, "monkeys", 1,2,3,]); + +/* Step 5.c.iii. + If n + len > 2^53 - 1, throw a TypeError */ +var spreadableLengthOutOfRange = {}; +spreadableLengthOutOfRange.length = Number.MAX_SAFE_INTEGER; +spreadableLengthOutOfRange[Symbol.isConcatSpreadable] = true; +/* +TODO +this.length = (2^53/2) +this.concat(a) throws if a.length = 2^53/2 - 1 +*/ + + +assertThrowsInstanceOf(() => tup.concat(spreadableLengthOutOfRange), + TypeError, + 'Too long array'); + +/* Step 5.c.iv.2. Let exists be ?HasProperty(E, P) + Step 5.c.iv.3 Append only if exists is true */ +assertEq(tup.concat([42,17,,5,,12]), #[1,2,3,42,17,5,12]); + +/* Step 5.c.iv.3.b. -- Object elements should throw */ +assertThrowsInstanceOf(() => tup.concat([1, new Object(), 2]), + TypeError, + '#[1,2,3].concat([1, new Object(), 2]) throws a TypeError exception'); + +/* Step 5d -- add as a single item */ +assertEq(tup.concat("monkeys"), #[1,2,3, "monkeys"]); +/* +Step 5d.c.ii. +- Throw if this has length 2^53 +TODO: not sure how to test this -- creating a tuple with length 2^53 takes too long +*/ + +/* Step 5d.iii -- Object should throw */ +assertThrowsInstanceOf(() => tup.concat(new Object()), TypeError, + '#[1,2,3].concat(new Object()) throws a TypeError exception'); + +reportCompare(0, 0); |