diff options
Diffstat (limited to 'js/src/tests/ecma_6/Symbol/equality.js')
-rw-r--r-- | js/src/tests/ecma_6/Symbol/equality.js | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Symbol/equality.js b/js/src/tests/ecma_6/Symbol/equality.js new file mode 100644 index 000000000..eaa091ba4 --- /dev/null +++ b/js/src/tests/ecma_6/Symbol/equality.js @@ -0,0 +1,30 @@ +/* Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/licenses/publicdomain/ */ + +// Symbol.for returns the same symbol whenever the same argument is passed. +assertEq(Symbol.for("q") === Symbol.for("q"), true); + +// Several distinct Symbol values. +var symbols = [ + Symbol(), + Symbol("Symbol.iterator"), + Symbol("Symbol.iterator"), // distinct new symbol with the same description + Symbol.for("Symbol.iterator"), + Symbol.iterator +]; + +// Distinct symbols are never equal to each other, even if they have the same +// description. +for (var i = 0; i < symbols.length; i++) { + for (var j = i; j < symbols.length; j++) { + var expected = (i === j); + assertEq(symbols[i] == symbols[j], expected); + assertEq(symbols[i] != symbols[j], !expected); + assertEq(symbols[i] === symbols[j], expected); + assertEq(symbols[i] !== symbols[j], !expected); + assertEq(Object.is(symbols[i], symbols[j]), expected); + } +} + +if (typeof reportCompare === "function") + reportCompare(0, 0); |