LibJS: Convert all remaining non-Array tests to the new system :)

Libraries/LibJS/Tests/classes/class-setters.js

@@ -0,0 +1,100 @@
+test("basic functionality", () => {
+  class A {
+    get x() {
+      return this._x;
+    }
+
+    set x(value) {
+      this._x = value * 2;
+    }
+  }
+
+  expect(A.x).toBeUndefined();
+  expect(A).not.toHaveProperty("_x");
+  const a = new A();
+  expect(a.x).toBeUndefined();
+  expect(a).not.toHaveProperty("_x");
+  a.x = 3;
+  expect(a.x).toBe(6);
+  expect(a).toHaveProperty("_x", 6);
+});
+
+test("name", () => {
+  class A {
+    set x(v) {}
+  }
+
+  const d = Object.getOwnPropertyDescriptor(A.prototype, "x");
+  expect(d.set.name).toBe("set x");
+});
+
+test("extended name syntax", () => {
+  class A {
+    set "method with space"(value) {
+      this.a = value;
+    }
+
+    set 12(value) {
+      this.b = value;
+    }
+
+    set [`he${"llo"}`](value) {
+      this.c = value;
+    }
+  }
+
+  const a = new A();
+  a["method with space"] = 1;
+  a[12] = 2;
+  a.hello = 3;
+  expect(a.a).toBe(1);
+  expect(a.b).toBe(2);
+  expect(a.c).toBe(3);
+});
+
+test("inherited setter", () => {
+  class Parent {
+    get x() {
+      return this._x;
+    }
+
+    set x(value) {
+      this._x = value * 2;
+    }
+  }
+
+  class Child extends Parent {}
+
+  const c = new Child();
+
+  expect(c.x).toBeUndefined();
+  c.x = 10;
+  expect(c.x).toBe(20);
+});
+
+test("inherited static setter overriding", () => {
+  class Parent {
+    get x() {
+      return this._x;
+    }
+
+    set x(value) {
+      this._x = value * 2;
+    }
+  }
+
+  class Child extends Parent {
+    get x() {
+      return this._x;
+    }
+
+    set x(value) {
+      this._x = value * 3;
+    }
+  }
+
+  const c = new Child();
+  expect(c.x).toBeUndefined();
+  c.x = 10;
+  expect(c.x).toBe(30);
+});