1 files changed, 104 insertions, 0 deletions
diff --git a/Libraries/LibJS/Tests/classes/class-static-setters.js b/Libraries/LibJS/Tests/classes/class-static-setters.js
new file mode 100644
index 0000000000..41d867a7e5
--- /dev/null
+++ b/Libraries/LibJS/Tests/classes/class-static-setters.js
@@ -0,0 +1,104 @@
+describe("correct behavior", () => {
+  test("basic functionality", () => {
+    class A {
+      static get x() {
+        return this._x;
+      }
+
+      static set x(value) {
+        this._x = value * 2;
+      }
+    }
+
+    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 {
+      static set x(v) {}
+    }
+
+    const d = Object.getOwnPropertyDescriptor(A, "x");
+    expect(d.set.name).toBe("set x");
+  });
+
+  test("extended name syntax", () => {
+    class A {
+      static set "method with space"(value) {
+        this.a = value;
+      }
+
+      static set 12(value) {
+        this.b = value;
+      }
+
+      static set [`he${"llo"}`](value) {
+        this.c = value;
+      }
+    }
+
+    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 static setter", () => {
+    class Parent {
+      static get x() {
+        return this._x;
+      }
+
+      static set x(value) {
+        this._x = value * 2;
+      }
+    }
+
+    class Child extends Parent {}
+
+    expect(Child.x).toBeUndefined();
+    Child.x = 10;
+    expect(Child.x).toBe(20);
+  });
+
+  test("inherited static setter overriding", () => {
+    class Parent {
+      static get x() {
+        return this._x;
+      }
+
+      static set x(value) {
+        this._x = value * 2;
+      }
+    }
+
+    class Child extends Parent {
+      static get x() {
+        return this._x;
+      }
+
+      static set x(value) {
+        this._x = value * 3;
+      }
+    }
+
+    expect(Child.x).toBeUndefined();
+    Child.x = 10;
+    expect(Child.x).toBe(30);
+  });
+});
+
+describe("errors", () => {
+  test('"set static" is a syntax error', () => {
+    expect(`
+    class A {
+      set static foo(value) {}
+    }`).not.toEval();
+  });
+});