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LibJS: Add symbol objects

This commit adds the following classes: SymbolObject, SymbolConstructor,
SymbolPrototype, and Symbol. This commit does not introduce any
new functionality to the Object class, so they cannot be used as
property keys in objects.
This commit is contained in:
mattco98 2020-04-29 23:25:21 -07:00 committed by Andreas Kling
parent b5b08fba92
commit 4ced126704
21 changed files with 819 additions and 3 deletions

View file

@ -0,0 +1,30 @@
load("test-common.js")
try {
const localSym = Symbol("foo");
const globalSym = Symbol.for("foo");
assert(localSym !== globalSym);
assert(localSym !== Symbol("foo"));
assert(globalSym !== Symbol("foo"));
assert(globalSym === Symbol.for("foo"));
assert(localSym.toString() === "Symbol(foo)");
assert(globalSym.toString() === "Symbol(foo)");
assert(Symbol.for(1).description === "1");
assert(Symbol.for(true).description === "true");
assert(Symbol.for({}).description === "[object Object]");
assert(Symbol.for().description === "undefined");
assert(Symbol.for(null).description === "null");
assertThrowsError(() => {
Symbol.for(Symbol());
}, {
error: TypeError,
message: "Can't convert symbol to string",
});
console.log("PASS");
} catch (e) {
console.log("FAIL: " + e);
}