undef error upon reuse of F.open

[kdillon]

Hi!

It seems to me that a block like below should work:

<script type="text/javascript">
QUnit.config.reorder = false;
F.attach(QUnit);

for (let i = 1; i<=2; i++) {
  QUnit.test("Can open page next to test using relative path " + i, assert => {
    var URL = "./PageNextToTest"+i+".html";
    F.open(URL);
    F.add(() => {
      assert.ok(1);
    });
    F.wait(() => {
      F.win.close();
    });
  })
}
</script>

But we get

TypeError: Cannot read property 'replace' of undefined
at urlWithoutHash (https://localhost:31515/test/tools/javascript/libs/funcunit/funcunit.js:8987:24)
at isCurrentPage (https://localhost:31515/test/tools/javascript/libs/funcunit/funcunit.js:8989:28)
at Function._open (https://localhost:31515/test/tools/javascript/libs/funcunit/funcunit.js:9041:21)
at Object.method (https://localhost:31515/test/tools/javascript/libs/funcunit/funcunit.js:9005:34)
at https://localhost:31515/test/tools/javascript/libs/funcunit/funcunit.js:9585:26

It appears as though the funcunit.win object is not null after the window is closed. It seems reasonable to me that it should be null, but basically upon the 2nd time through, we consider the window to still be open (newpage becomes false), even though there is no child window.

So when we go to use _open, it falls through and looks for a window that already exists. It finds this not-null FuncUnit.win object, tries to parse the URL, and barfs because the URL is undef.

The fix for this could be pretty easy. We could just check the window object. If that is null, we open a new window. If the window object is not-null but has undef url we open a new window.

Thoughts? Thanks