LibJS: Move tests to /Tests/LibJS

Author: https://github.com/gmta
Commit: https://github.com/LadybirdBrowser/ladybird/commit/e3faa9b5add
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/7572
Reviewed-by: https://github.com/trflynn89 ✅

Tests/LibJS/Runtime/comments-basic.js

@@ -0,0 +1,53 @@
+test("regular comments", () => {
+    const source = `
+var i = 0;
+// i++;
+/* i++; */
+/*
+i++;
+*/
+/**/ i++;
+i;`;
+
+    expect(source).toEvalTo(1);
+});
+
+test("html comments", () => {
+    const source = `
+var i = 0;
+var j = 0;
+<!-- i++; --> i++;
+<!-- i++;
+i++;
+--> i++;
+/**/ --> i++;
+j --> i++;
+i;`;
+    expect(source).toEvalTo(2);
+});
+
+test("html comments directly after block comment", () => {
+    expect("0 /* */-->i").not.toEval();
+    expect(`0 /* 
+     */-->i`).toEval();
+    expect(`0 /* 
+     */-->i
+     'a'`).toEvalTo("a");
+});
+
+test("unterminated multi-line comment", () => {
+    expect("/*").not.toEval();
+    expect("/**").not.toEval();
+    expect("/*/").not.toEval();
+    expect("/* foo").not.toEval();
+    expect("foo /*").not.toEval();
+});
+
+test("hashbang comments", () => {
+    expect("#!").toEvalTo(undefined);
+    expect("#!/bin/js").toEvalTo(undefined);
+    expect("#!\n1").toEvalTo(1);
+    expect(" #!").not.toEval();
+    expect("\n#!").not.toEval();
+    expect("#!\n#!").not.toEval();
+});