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  <script src="/resources/testharness.js"></script>
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  <script src="resources/local-fs-test-helpers.js"></script>
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const setUpChildFrame = (done) => `
  const importScript = ${importScript};
  await importScript("/resources/testharness.js");
  await importScript("/resources/testdriver.js");
  await importScript("/resources/testdriver-vendor.js");
  await importScript("/file-system-access/resources/local-fs-test-helpers.js");
  await importScript("/file-system-access/resources/test-helpers.js");
  await window.test_driver.bless(
      'show a file picker.<br />Please select an empty directory');
  await send("${done}", "done");
`;

const createTestDir = (name) => (done) => `
  self.showDirectoryPicker().then(async (dir) => {
    await dir.getDirectoryHandle("${name}", {create: true});
    return send("${done}", "done");
  });
`;

const removeTestDir = (name) => (done) => `
  self.showDirectoryPicker().then(async (dir) => {
    await dir.removeEntry("${name}", {recursive: true});
    return send("${done}", "done");
  });
`;

const assertNumEntries = (numFiles) => (done) => `
  self.showDirectoryPicker().then(async (dir) => {
    assert_equals(${numFiles}, await getDirectoryEntryCount(dir));
    return send("${done}", "done");
  });
`;

const assertNoAccess = (done) => `
  try {
    await self.showDirectoryPicker();
    await send("${done}", "unexpected");
  } catch (e) {
    await send("${done}", "done");
  }
`;

// To be resilient against tests not cleaning up properly, cleanup before
// every test.
function clearDirectories() {
  const directory = await directory_promise;
  for await (let entry of directory.values()) {
    await directory.removeEntry(
        entry.name, {recursive: entry.kind === 'directory'});
  }
}

// The following tests make use of helper framed_test to define promise tests
// that send assertion scripts to multiple executor subframes.

framed_test(async (t, sendTo) => {
  clearDirectories();
  // Ensure we have directory picker access in all child contexts.
  await sendTo(childContexts, setUpChildFrame);
  await sendTo(sameSiteContexts, assertNumEntries(0));

  // Create directory in anonymous same-site context.
  await sendTo([FRAME_CONTEXT.anonymousFrameSameSite], createTestDir("test"));

  // Assert we can see the directory from all same-site contexts.
  await sendTo(sameSiteContexts, assertNumEntries(1));
}, 'getDirectoryHandle can access handles across same-site contexts.');

framed_test(async (t, sendTo) => {
  clearDirectories();
  // Ensure we have directory picker access in all child contexts.
  await sendTo(childContexts, setUpChildFrame);
  await sendTo(sameSiteContexts, assertNumEntries(0));

  // Create a test directory in a third-party same-site context.
  await sendTo([FRAME_CONTEXT.thirdPartySameSite], createTestDir("file"));
  await sendTo([FRAME_CONTEXT.thirdPartySameSite], assertNumEntries(1));

  // Remove directory from an anonymous same-site context.
  await sendTo([FRAME_CONTEXT.anonymousFrameSameSite], removeTestDir("file"));
  // Assert third-party same-site context can no longer access directory.
  await sendTo([FRAME_CONTEXT.thirdPartySameSite], assertNumEntries(0));
}, 'Directory handles can be removed from other same-site contexts.');

framed_test(async (t, sendTo) => {
  clearDirectories();
  // Ensure we have directory picker access in all child contexts.
  await sendTo(childContexts, setUpChildFrame);
  // Assert that an error is raised when attempting to access
  // getDirectoryHandle.
  await sendTo(crossSiteContexts, assertNoAccess);
}, 'Cross-site sub-frames can not access getDirectoryHandle.');

// TODO(crbug.com/1322897): Add tests for ancestor bit frames.
// TODO(crbug.com/1099413): Add tests for non-default buckets.

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