Libraries: Move to Userland/Libraries/

Userland/Libraries/LibJS/Tests/const-reassignment.js

@@ -0,0 +1,17 @@
+// I'm not sure how this test passed before the refactor, but it definitely doesn't work at all
+test.skip("reassignment to const", () => {
+    const constantValue = 1;
+    expect(() => {
+        constantValue = 2;
+    }).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
+    expect(constantValue).toBe(1);
+});
+
+test("const creation in inner scope", () => {
+    const constantValue = 1;
+    do {
+        const constantValue = 2;
+        expect(constantValue).toBe(2);
+    } while (false);
+    expect(constantValue).toBe(1);
+});