LibJS: Add tests for the new steps added to PerformEval

Userland/Libraries/LibJS/Tests/functions/function-new-target.js

@@ -20,6 +20,42 @@ test("basic functionality", () => {
     expect(new baz().newTarget).toEqual(baz);
 });
 
+test("retrieving new.target from direct eval", () => {
+    function foo() {
+        return eval("new.target");
+    }
+
+    let result;
+
+    expect(() => {
+        result = foo();
+    }).not.toThrowWithMessage(SyntaxError, "'new.target' not allowed outside of a function");
+
+    expect(result).toBe(undefined);
+
+    expect(() => {
+        result = new foo();
+    }).not.toThrowWithMessage(SyntaxError, "'new.target' not allowed outside of a function");
+
+    expect(result).toBe(foo);
+});
+
+test("cannot retrieve new.target from indirect eval", () => {
+    const indirect = eval;
+
+    function foo() {
+        return indirect("new.target");
+    }
+
+    expect(() => {
+        foo();
+    }).toThrowWithMessage(SyntaxError, "'new.target' not allowed outside of a function");
+
+    expect(() => {
+        new foo();
+    }).toThrowWithMessage(SyntaxError, "'new.target' not allowed outside of a function");
+});
+
 test("syntax error outside of function", () => {
     expect("new.target").not.toEval();
 });