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LibJS: Add most of the Set.prototype methods

Specifically all aside from "values" and "entries" which require an
implementation of the SetIterator object.
This commit is contained in:
Idan Horowitz 2021-06-09 00:14:08 +03:00 committed by Linus Groh
parent 670be04c81
commit 0b0f1eda05
9 changed files with 164 additions and 0 deletions

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@ -27,5 +27,10 @@ describe("normal behavior", () => {
var a = new Set([0, 1, 2]);
expect(a instanceof Set).toBeTrue();
expect(a).toHaveSize(3);
var seen = [false, false, false];
a.forEach(x => {
seen[x] = true;
});
expect(seen[0] && seen[1] && seen[2]);
});
});

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@ -0,0 +1,10 @@
test("basic functionality", () => {
expect(Set.prototype.add).toHaveLength(1);
const set = new Set(["a", "b", "c"]);
expect(set).toHaveSize(3);
expect(set.add("d")).toBe(set);
expect(set).toHaveSize(4);
expect(set.add("a")).toBe(set);
expect(set).toHaveSize(4);
});

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@ -0,0 +1,8 @@
test("basic functionality", () => {
expect(Set.prototype.clear).toHaveLength(0);
const set = new Set(["a", "b", "c"]);
expect(set).toHaveSize(3);
set.clear();
expect(set).toHaveSize(0);
});

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@ -0,0 +1,10 @@
test("basic functionality", () => {
expect(Set.prototype.delete).toHaveLength(1);
const set = new Set(["a", "b", "c"]);
expect(set).toHaveSize(3);
expect(set.delete("b")).toBeTrue();
expect(set).toHaveSize(2);
expect(set.delete("b")).toBeFalse();
expect(set).toHaveSize(2);
});

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@ -0,0 +1,48 @@
test("length is 1", () => {
expect(Set.prototype.forEach).toHaveLength(1);
});
describe("errors", () => {
test("requires at least one argument", () => {
expect(() => {
new Set().forEach();
}).toThrowWithMessage(TypeError, "undefined is not a function");
});
test("callback must be a function", () => {
expect(() => {
new Set().forEach(undefined);
}).toThrowWithMessage(TypeError, "undefined is not a function");
});
});
describe("normal behavior", () => {
test("never calls callback with empty set", () => {
var callbackCalled = 0;
expect(
new Set().forEach(() => {
callbackCalled++;
})
).toBeUndefined();
expect(callbackCalled).toBe(0);
});
test("calls callback once for every item", () => {
var callbackCalled = 0;
expect(
new Set([1, 2, 3]).forEach(() => {
callbackCalled++;
})
).toBeUndefined();
expect(callbackCalled).toBe(3);
});
test("callback receives value twice and set", () => {
var a = new Set([1, 2, 3]);
a.forEach((value1, value2, set) => {
expect(a.has(value1)).toBeTrue();
expect(value1).toBe(value2);
expect(set).toBe(a);
});
});
});

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@ -0,0 +1,13 @@
test("length is 1", () => {
expect(Set.prototype.has).toHaveLength(1);
});
test("basic functionality", () => {
var set = new Set(["hello", "friends", 1, 2, false]);
expect(new Set().has()).toBeFalse();
expect(new Set([undefined]).has()).toBeTrue();
expect(set.has("hello")).toBeTrue();
expect(set.has(1)).toBeTrue();
expect(set.has("serenity")).toBeFalse();
});