1 files changed, 291 insertions, 0 deletions
diff --git a/cli/js/timers_test.ts b/cli/js/timers_test.ts
new file mode 100644
index 000000000..bc4fcffcf
--- /dev/null
+++ b/cli/js/timers_test.ts
@@ -0,0 +1,291 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { test, assert, assertEquals, assertNotEquals } from "./test_util.ts";
+
+function deferred(): {
+  promise: Promise<{}>;
+  resolve: (value?: {} | PromiseLike<{}>) => void;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  reject: (reason?: any) => void;
+} {
+  let resolve;
+  let reject;
+  const promise = new Promise(
+    (res, rej): void => {
+      resolve = res;
+      reject = rej;
+    }
+  );
+  return {
+    promise,
+    resolve,
+    reject
+  };
+}
+
+async function waitForMs(ms): Promise<number> {
+  return new Promise((resolve): number => setTimeout(resolve, ms));
+}
+
+test(async function timeoutSuccess(): Promise<void> {
+  const { promise, resolve } = deferred();
+  let count = 0;
+  setTimeout((): void => {
+    count++;
+    resolve();
+  }, 500);
+  await promise;
+  // count should increment
+  assertEquals(count, 1);
+});
+
+test(async function timeoutArgs(): Promise<void> {
+  const { promise, resolve } = deferred();
+  const arg = 1;
+  setTimeout(
+    (a, b, c): void => {
+      assertEquals(a, arg);
+      assertEquals(b, arg.toString());
+      assertEquals(c, [arg]);
+      resolve();
+    },
+    10,
+    arg,
+    arg.toString(),
+    [arg]
+  );
+  await promise;
+});
+
+test(async function timeoutCancelSuccess(): Promise<void> {
+  let count = 0;
+  const id = setTimeout((): void => {
+    count++;
+  }, 1);
+  // Cancelled, count should not increment
+  clearTimeout(id);
+  await waitForMs(600);
+  assertEquals(count, 0);
+});
+
+test(async function timeoutCancelMultiple(): Promise<void> {
+  function uncalled(): never {
+    throw new Error("This function should not be called.");
+  }
+
+  // Set timers and cancel them in the same order.
+  const t1 = setTimeout(uncalled, 10);
+  const t2 = setTimeout(uncalled, 10);
+  const t3 = setTimeout(uncalled, 10);
+  clearTimeout(t1);
+  clearTimeout(t2);
+  clearTimeout(t3);
+
+  // Set timers and cancel them in reverse order.
+  const t4 = setTimeout(uncalled, 20);
+  const t5 = setTimeout(uncalled, 20);
+  const t6 = setTimeout(uncalled, 20);
+  clearTimeout(t6);
+  clearTimeout(t5);
+  clearTimeout(t4);
+
+  // Sleep until we're certain that the cancelled timers aren't gonna fire.
+  await waitForMs(50);
+});
+
+test(async function timeoutCancelInvalidSilentFail(): Promise<void> {
+  // Expect no panic
+  const { promise, resolve } = deferred();
+  let count = 0;
+  const id = setTimeout((): void => {
+    count++;
+    // Should have no effect
+    clearTimeout(id);
+    resolve();
+  }, 500);
+  await promise;
+  assertEquals(count, 1);
+
+  // Should silently fail (no panic)
+  clearTimeout(2147483647);
+});
+
+test(async function intervalSuccess(): Promise<void> {
+  const { promise, resolve } = deferred();
+  let count = 0;
+  const id = setInterval((): void => {
+    count++;
+    clearInterval(id);
+    resolve();
+  }, 100);
+  await promise;
+  // Clear interval
+  clearInterval(id);
+  // count should increment twice
+  assertEquals(count, 1);
+});
+
+test(async function intervalCancelSuccess(): Promise<void> {
+  let count = 0;
+  const id = setInterval((): void => {
+    count++;
+  }, 1);
+  clearInterval(id);
+  await waitForMs(500);
+  assertEquals(count, 0);
+});
+
+test(async function intervalOrdering(): Promise<void> {
+  const timers = [];
+  let timeouts = 0;
+  function onTimeout(): void {
+    ++timeouts;
+    for (let i = 1; i < timers.length; i++) {
+      clearTimeout(timers[i]);
+    }
+  }
+  for (let i = 0; i < 10; i++) {
+    timers[i] = setTimeout(onTimeout, 1);
+  }
+  await waitForMs(500);
+  assertEquals(timeouts, 1);
+});
+
+test(async function intervalCancelInvalidSilentFail(): Promise<void> {
+  // Should silently fail (no panic)
+  clearInterval(2147483647);
+});
+
+test(async function fireCallbackImmediatelyWhenDelayOverMaxValue(): Promise<
+  void
+> {
+  let count = 0;
+  setTimeout((): void => {
+    count++;
+  }, 2 ** 31);
+  await waitForMs(1);
+  assertEquals(count, 1);
+});
+
+test(async function timeoutCallbackThis(): Promise<void> {
+  const { promise, resolve } = deferred();
+  const obj = {
+    foo(): void {
+      assertEquals(this, window);
+      resolve();
+    }
+  };
+  setTimeout(obj.foo, 1);
+  await promise;
+});
+
+test(async function timeoutBindThis(): Promise<void> {
+  function noop(): void {}
+
+  const thisCheckPassed = [null, undefined, window, globalThis];
+
+  const thisCheckFailed = [
+    0,
+    "",
+    true,
+    false,
+    {},
+    [],
+    "foo",
+    (): void => {},
+    Object.prototype
+  ];
+
+  thisCheckPassed.forEach(
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    (thisArg: any): void => {
+      let hasThrown = 0;
+      try {
+        setTimeout.call(thisArg, noop, 1);
+        hasThrown = 1;
+      } catch (err) {
+        if (err instanceof TypeError) {
+          hasThrown = 2;
+        } else {
+          hasThrown = 3;
+        }
+      }
+      assertEquals(hasThrown, 1);
+    }
+  );
+
+  thisCheckFailed.forEach(
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    (thisArg: any): void => {
+      let hasThrown = 0;
+      try {
+        setTimeout.call(thisArg, noop, 1);
+        hasThrown = 1;
+      } catch (err) {
+        if (err instanceof TypeError) {
+          hasThrown = 2;
+        } else {
+          hasThrown = 3;
+        }
+      }
+      assertEquals(hasThrown, 2);
+    }
+  );
+});
+
+test(async function clearTimeoutShouldConvertToNumber(): Promise<void> {
+  let called = false;
+  const obj = {
+    valueOf(): number {
+      called = true;
+      return 1;
+    }
+  };
+  clearTimeout((obj as unknown) as number);
+  assert(called);
+});
+
+test(function setTimeoutShouldThrowWithBigint(): void {
+  let hasThrown = 0;
+  try {
+    setTimeout((): void => {}, (1n as unknown) as number);
+    hasThrown = 1;
+  } catch (err) {
+    if (err instanceof TypeError) {
+      hasThrown = 2;
+    } else {
+      hasThrown = 3;
+    }
+  }
+  assertEquals(hasThrown, 2);
+});
+
+test(function clearTimeoutShouldThrowWithBigint(): void {
+  let hasThrown = 0;
+  try {
+    clearTimeout((1n as unknown) as number);
+    hasThrown = 1;
+  } catch (err) {
+    if (err instanceof TypeError) {
+      hasThrown = 2;
+    } else {
+      hasThrown = 3;
+    }
+  }
+  assertEquals(hasThrown, 2);
+});
+
+test(function testFunctionName(): void {
+  assertEquals(clearTimeout.name, "clearTimeout");
+  assertEquals(clearInterval.name, "clearInterval");
+});
+
+test(function testFunctionParamsLength(): void {
+  assertEquals(setTimeout.length, 1);
+  assertEquals(setInterval.length, 1);
+  assertEquals(clearTimeout.length, 0);
+  assertEquals(clearInterval.length, 0);
+});
+
+test(function clearTimeoutAndClearIntervalNotBeEquals(): void {
+  assertNotEquals(clearTimeout, clearInterval);
+});