1 files changed, 27 insertions, 1 deletions
diff --git a/cli/tests/unit/permissions_test.ts b/cli/tests/unit/permissions_test.ts
index 2dcb67abf..8a6d7e9aa 100644
--- a/cli/tests/unit/permissions_test.ts
+++ b/cli/tests/unit/permissions_test.ts
@@ -1,5 +1,6 @@
 // Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
 import {
+  assert,
   assertEquals,
   assertThrows,
   assertThrowsAsync,
@@ -10,7 +11,7 @@ unitTest(async function permissionInvalidName(): Promise<void> {
   await assertThrowsAsync(async () => {
     // deno-lint-ignore no-explicit-any
     await Deno.permissions.query({ name: "foo" as any });
-  }, Error);
+  }, TypeError);
 });
 
 unitTest(async function permissionNetInvalidHost(): Promise<void> {
@@ -19,8 +20,33 @@ unitTest(async function permissionNetInvalidHost(): Promise<void> {
   }, URIError);
 });
 
+unitTest(async function permissionQueryReturnsEventTarget() {
+  const status = await Deno.permissions.query({ name: "hrtime" });
+  assert(["granted", "denied", "prompt"].includes(status.state));
+  let called = false;
+  status.addEventListener("change", () => {
+    called = true;
+  });
+  status.dispatchEvent(new Event("change"));
+  assert(called);
+  assert(status === (await Deno.permissions.query({ name: "hrtime" })));
+});
+
+unitTest(async function permissionQueryForReadReturnsSameStatus() {
+  const status1 = await Deno.permissions.query({
+    name: "read",
+    path: ".",
+  });
+  const status2 = await Deno.permissions.query({
+    name: "read",
+    path: ".",
+  });
+  assert(status1 === status2);
+});
+
 unitTest(function permissionsIllegalConstructor() {
   assertThrows(() => new Deno.Permissions(), TypeError, "Illegal constructor.");
+  assertEquals(Deno.Permissions.length, 0);
 });
 
 unitTest(function permissionStatusIllegalConstructor() {