Libraries: Move to Userland/Libraries/

Userland/Libraries/LibJS/Tests/builtins/Proxy/Proxy.js

@@ -0,0 +1,37 @@
+test("constructs properly", () => {
+    expect(() => {
+        new Proxy({}, {});
+    }).not.toThrow();
+});
+
+test("constructor argument count", () => {
+    expect(() => {
+        new Proxy();
+    }).toThrowWithMessage(TypeError, "Proxy constructor requires at least two arguments");
+
+    expect(() => {
+        new Proxy({});
+    }).toThrowWithMessage(TypeError, "Proxy constructor requires at least two arguments");
+});
+
+test("constructor requires objects", () => {
+    expect(() => {
+        new Proxy(1, {});
+    }).toThrowWithMessage(
+        TypeError,
+        "Expected target argument of Proxy constructor to be object, got 1"
+    );
+
+    expect(() => {
+        new Proxy({}, 1);
+    }).toThrowWithMessage(
+        TypeError,
+        "Expected handler argument of Proxy constructor to be object, got 1"
+    );
+});
+
+test("constructor must be invoked with 'new'", () => {
+    expect(() => {
+        Proxy({}, {});
+    }).toThrowWithMessage(TypeError, "Proxy constructor must be called with 'new'");
+});