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

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

@@ -0,0 +1,69 @@
+// This file must not be formatted by prettier. Make sure your IDE
+// respects the .prettierignore file!
+
+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");
+});