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207 lines
8.9 KiB
207 lines
8.9 KiB
// Print types of elements too, because e.g. true and Boolean(true) print
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// out the same normally ("true"). Also print non-existent properties
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// explicitly.
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function printArray(t) {
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var tmp = [];
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for (i = 0; i < t.length; i++) {
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var exists = t.hasOwnProperty(String(i));
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if (exists) {
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tmp.push(typeof t[i] + ':' + t[i]);
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} else {
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tmp.push('nonexistent');
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}
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}
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print(typeof t + ' ' + t.length + ' ' + tmp.join(','));
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}
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/*===
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basic
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TypeError
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TypeError
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TypeError
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TypeError
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object 5 object:true,number:1,number:2,string:foo,string:bar
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object 5 object:false,number:1,number:2,string:foo,string:bar
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object 5 object:123,number:1,number:2,string:foo,string:bar
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object 5 object:foo,number:1,number:2,string:foo,string:bar
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object 6 number:1,number:2,number:1,number:2,string:foo,string:bar
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object 5 object:[object Object],number:1,number:2,string:foo,string:bar
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object 4 number:1,number:2,number:3,number:4
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object 101 1,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,2,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,3
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object 101 4,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,5,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,6
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object 202 number:1,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,number:2,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,number:3,number:4,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,number:5,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,nonexistent,number:6
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object 101 [object Object]
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object 101 [object Object]
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object 2 object:[object Object],object:[object Object]
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object 4 object:true,number:1,number:2,number:3
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object 4 object:[object Object],number:1,number:2,number:3
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object 4 object:[object Object],number:1,number:2,number:3
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object 5 string:foo,string:bar,number:1,number:2,number:3
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object 4 nonexistent,nonexistent,nonexistent,string:elem
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object 5 number:1,nonexistent,nonexistent,nonexistent,string:elem
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object 4 string:foo,string:bar,nonexistent,nonexistent
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object 8 number:1,number:1,number:2,string:foo,string:bar,nonexistent,nonexistent,number:4
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===*/
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print('basic');
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function basicTest() {
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var t1, t2;
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function test(this_value, args) {
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var t;
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try {
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if (args.length == 0) {
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t = Array.prototype.concat.call(this_value);
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} else if (args.length == 1) {
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t = Array.prototype.concat.call(this_value, args[0]);
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} else if (args.length == 2) {
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t = Array.prototype.concat.call(this_value, args[0], args[1]);
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} else if (args.length == 3) {
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t = Array.prototype.concat.call(this_value, args[0], args[1], args[2]);
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} else {
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t = Array.prototype.concat.call(this_value, args[0], args[1], args[2], args[3]);
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}
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printArray(t);
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} catch (e) {
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print(e.name);
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}
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}
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// actual number of call arguments matter; undefined is treated
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// differently from an argument not given at all
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test(undefined, []);
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test(undefined, [ undefined ]);
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// basic types test
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// (note that 'this' argument is always ToObject() coerced, even for
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// strict functions)
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test(undefined, [ 1, 2, [ 'foo', 'bar' ] ]);
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test(null, [ 1, 2, [ 'foo', 'bar' ] ]);
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test(true, [ 1, 2, [ 'foo', 'bar' ] ]);
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test(false, [ 1, 2, [ 'foo', 'bar' ] ]);
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test(123, [ 1, 2, [ 'foo', 'bar' ] ]);
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test('foo', [ 1, 2, [ 'foo', 'bar' ] ]);
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test([1,2], [ 1, 2, [ 'foo', 'bar' ] ]);
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test({ foo: 1, bar: 2 }, [ 1, 2, [ 'foo', 'bar' ] ]);
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// concatenating two dense arrays
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t1 = [ 1, 2 ];
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t2 = [ 3, 4 ];
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test(t1, [ t2 ]);
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// concatenating two sparse arrays
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t1 = [ 1 ];
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t1[100] = 3;
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t1[50] = 2;
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t2 = [ 4 ];
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t2[100] = 6;
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t2[50] = 5;
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print(typeof t1, t1.length, t1);
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print(typeof t2, t2.length, t2);
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test(t1, [ t2 ]);
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// concatenating two non-arrays; here the objects don't fall into the
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// special handling in step 5.b and are put into the result array as is
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t1 = { '0': 1, '100': 2, length: 101 };
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t2 = { '0': 3, '100': 4, length: 101 };
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print(typeof t1, t1.length, t1);
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print(typeof t2, t2.length, t2);
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test(t1, [ t2 ]);
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// 'this' is ToObject() coerced and becomes the first element to be
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// processed in the loop of E5.1 Section 15.4.4.4, step 5. If 'this'
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// is an array it falls into the special handling of step 5.b (this
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// is the typical case); otherwise it is used as the first element
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// as-is.
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//
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// (V8 seems to coerce 'true' to a primitive boolean value, not a
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// Boolean object.)
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test(true, [ 1, 2, 3 ]); // ToObject(true) -> Boolean(true)
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test({ foo: 1, bar: 2 }, [ 1, 2, 3 ]); // already an object
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test({ '0': 'foo', '1': 'bar', length: 2 }, [ 1, 2, 3 ]); // no special treatment even if "array like"
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test([ 'foo', 'bar' ], [ 1, 2, 3 ]); // Array -> "flattened"
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// An array in the argument list is "flattened". The algorithm in E5.1
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// Section 15.4.4.4 won't insert missing elements into the result array
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// (the 'n' counter is incremented). If no elements are inserted after
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// flattening, trailing non-existent elements won't increase the result
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// "length".
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//
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// Both V8 and Rhino seem to deviate from this: they will update the
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// result length even for trailing non-existent elements.
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//
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// This case is now tested separately by test-bi-array-proto-concat-nonstd-trailing.js
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// because the desired behavior is non-standard.
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t = [];
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t[3] = 'elem';
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printArray(t);
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test([1], [ t ]);
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t = [ 'foo', 'bar' ];
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t.length = 4; // two "non-existent" elements
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printArray(t);
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test([1], [ 1, 2, t, 4 ]); // '4' will update final length -> 8
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/* Disabled, see test-bi-array-proto-concat-nonstd-trailing.js
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t = [ 'foo', 'bar' ];
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t.length = 4; // two "non-existent" elements
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printArray(t);
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test([1], [ 1, 2, t ]); // nothing follows non-existent elements, so final length should be 5, not 7
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// Rhino and V8 will have final result length 7
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*/
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}
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try {
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basicTest();
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} catch (e) {
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print(e);
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}
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/*===
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implant
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object 2 object:true,string:foo
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===*/
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print('implant');
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function implantTest() {
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'use strict';
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var t;
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var proto;
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// when concat() is invoked, this binding will the primitive 'true'
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// value, which is then coerced to an object in concat() step 1.
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Boolean.prototype.concat = Array.prototype.concat;
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t = true.concat('foo');
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printArray(t);
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// It would be nice to test a case where an implanted concat was used
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// with a "sub-class" of Array. However, because of E5.1 Section
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// 15.4.4.4 step 5.b, the 'this' binding would not be treated as an
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// Array anyway, and the 'this' binding would thus go as is into the
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// result array, as happens above for the Boolean test.
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}
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try {
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implantTest();
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} catch (e) {
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print(e);
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}
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