1 files changed, 87 insertions, 0 deletions
diff --git a/testing/web-platform/tests/shared-storage/resources/util.js b/testing/web-platform/tests/shared-storage/resources/util.js
new file mode 100644
index 0000000000..838885a565
--- /dev/null
+++ b/testing/web-platform/tests/shared-storage/resources/util.js
@@ -0,0 +1,87 @@
+'use strict';
+
+async function IsSharedStorageSelectUrlAllowedByPermissionsPolicy() {
+  const errorMessage = 'The \"shared-storage-select-url\" Permissions Policy denied the usage of window.sharedStorage.selectURL().';
+  let allowedByPermissionsPolicy = true;
+  try {
+    // Run selectURL() with without addModule() and this should always fail.
+    // Check the error message to distinguish between the permissions policy
+    // error and the missing addModule() error.
+    await sharedStorage.selectURL("operation", [{url: "1.html"}]);
+    assert_unreached("did not fail");
+  } catch (e) {
+    if (e.message === errorMessage) {
+      allowedByPermissionsPolicy = false;
+    }
+  }
+
+  return allowedByPermissionsPolicy;
+}
+
+// Execute all shared storage methods and capture their errors. Return true if
+// the permissions policy allows all of them; return false if the permissions
+// policy disallows all of them. Precondition: only these two outcomes are
+// possible.
+async function AreSharedStorageMethodsAllowedByPermissionsPolicy() {
+  let permissionsPolicyDeniedCount = 0;
+  const errorMessage = 'The \"shared-storage\" Permissions Policy denied the method on window.sharedStorage.';
+
+  try {
+    await window.sharedStorage.worklet.addModule('/shared-storage/resources/simple-module.js');
+  } catch (e) {
+    assert_equals(e.message, errorMessage);
+    ++permissionsPolicyDeniedCount;
+  }
+
+  try {
+    await window.sharedStorage.run('operation');
+  } catch (e) {
+    assert_equals(e.message, errorMessage);
+    ++permissionsPolicyDeniedCount;
+  }
+
+  try {
+    // Run selectURL() with without addModule() and this should always fail.
+    // Check the error message to distinguish between the permissions policy
+    // error and the missing addModule() error.
+    await sharedStorage.selectURL("operation", [{url: "1.html"}]);
+    assert_unreached("did not fail");
+  } catch (e) {
+    if (e.message === errorMessage) {
+      ++permissionsPolicyDeniedCount;
+    }
+  }
+
+  try {
+    await window.sharedStorage.set('a', 'b');
+  } catch (e) {
+    assert_equals(e.message, errorMessage);
+    ++permissionsPolicyDeniedCount;
+  }
+
+  try {
+    await window.sharedStorage.append('a', 'b');
+  } catch (e) {
+    assert_equals(e.message, errorMessage);
+    ++permissionsPolicyDeniedCount;
+  }
+
+  try {
+    await window.sharedStorage.clear();
+  } catch (e) {
+    assert_equals(e.message, errorMessage);
+    ++permissionsPolicyDeniedCount;
+  }
+
+  try {
+    await window.sharedStorage.delete('a');
+  } catch (e) {
+    assert_equals(e.message, errorMessage);
+    ++permissionsPolicyDeniedCount;
+  }
+
+  if (permissionsPolicyDeniedCount === 0)
+    return true;
+
+  return false;
+}
+\ No newline at end of file