LibJS/Tests: Use canParseSource() for toEval()

We can now enable the "new.target is syntax error outside of function"
test :^)

Libraries/LibJS/Tests/automatic-semicolon-insertion.js

@@ -1,18 +1,18 @@
 test("Issue #1829, if-else without braces or semicolons", () => {
  const source = `if (1)
- return 1;
+ foo;
 else
- return 0;
+ bar;
 
 if (1)
- return 1
+ foo
 else
- return 0
+ bar
 
 if (1)
- return 1
+ foo
 else
- return 0;`;
+ bar;`;
 
  expect(source).toEval();
 });

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

@@ -20,7 +20,6 @@ test("basic functionality", () => {
  expect(new baz().newTarget).toEqual(baz);
 });
 
-// FIXME: This does not work as expected as toEval() places the code inside a function :|
-test.skip("syntax error outside of function", () => {
+test("syntax error outside of function", () => {
  expect("new.target").not.toEval();
 });

Libraries/LibJS/Tests/test-common-tests.js

@@ -326,13 +326,11 @@ test("toThrowWithMessage", () => {
  expect(thrower).not.toThrowWithMessage(TypeError, "foo baz");
 });
 
-// FIXME: Will have to change when this matcher changes to use the
-// "eval" function
 test("toEval", () => {
  expect("let a = 1").toEval();
  expect("a < 1").toEval();
  expect("&&*^%#%@").not.toEval();
- expect("function foo() { return 1; }; return foo();").toEval();
+ expect("function foo() { return 1; }; foo();").toEval();
 });
 
 // FIXME: Will have to change when this matcher changes to use the

Libraries/LibJS/Tests/test-common.js

@@ -302,14 +302,8 @@ class ExpectationError extends Error {
  // Test for syntax errors; target must be a string
  toEval() {
  this.__expect(typeof this.target === "string");
-
- let threw = false;
- try {
- new Function(this.target);
- } catch (e) {
- threw = true;
- }
- this.__expect(this.inverted ? threw : !threw);
+ const success = canParseSource(this.target)
+ this.__expect(this.inverted ? !success : success);
  }
 
  // Must compile regardless of inverted-ness