ladybird/Libraries/LibJS/Tests/classes/class-expressions.js

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test("basic functionality", () => {
  const A = class {
    constructor(x) {
      this.x = x;
    }

    getX() {
      return this.x * 2;
    }
  };

  expect(new A(10).getX()).toBe(20);
});

test("inline instantiation", () => {
  const a = new class {
    constructor() {
      this.x = 10;
    }

    getX() {
      return this.x * 2;
    }
  };

  expect(a.getX()).toBe(20);
});

test("inline instantiation with argument", () => {
  const a = new class {
    constructor(x) {
      this.x = x;
    }

    getX() {
      return this.x * 2;
    }
  }(10);

  expect(a.getX()).toBe(20);
});

test("extending class expressions", () => {
  class A extends class {
    constructor(x) {
      this.x = x;
    }
  } {
    constructor(y) {
      super(y);
      this.y = y * 2;
    }
  };

  const a = new A(10);
  expect(a.x).toBe(10);
  expect(a.y).toBe(20);
});

test("class expression name", () => {
  let A = class {}
  expect(A.name).toBe("A");

  let B = class C {}
  expect(B.name).toBe("C");
});