1 files changed, 185 insertions, 0 deletions
diff --git a/tests/unit/performance_test.ts b/tests/unit/performance_test.ts
new file mode 100644
index 000000000..0c9ed21df
--- /dev/null
+++ b/tests/unit/performance_test.ts
@@ -0,0 +1,185 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import {
+  assert,
+  assertEquals,
+  assertNotStrictEquals,
+  assertStringIncludes,
+  assertThrows,
+} from "./test_util.ts";
+
+Deno.test({ permissions: { hrtime: false } }, async function performanceNow() {
+  const { promise, resolve } = Promise.withResolvers<void>();
+  const start = performance.now();
+  let totalTime = 0;
+  setTimeout(() => {
+    const end = performance.now();
+    totalTime = end - start;
+    resolve();
+  }, 10);
+  await promise;
+  assert(totalTime >= 10);
+});
+
+Deno.test(function timeOrigin() {
+  const origin = performance.timeOrigin;
+
+  assert(origin > 0);
+  assert(Date.now() >= origin);
+});
+
+Deno.test(function performanceToJSON() {
+  const json = performance.toJSON();
+
+  assert("timeOrigin" in json);
+  assert(json.timeOrigin === performance.timeOrigin);
+  // check there are no other keys
+  assertEquals(Object.keys(json).length, 1);
+});
+
+Deno.test(function performanceMark() {
+  const mark = performance.mark("test");
+  assert(mark instanceof PerformanceMark);
+  assertEquals(mark.detail, null);
+  assertEquals(mark.name, "test");
+  assertEquals(mark.entryType, "mark");
+  assert(mark.startTime > 0);
+  assertEquals(mark.duration, 0);
+  const entries = performance.getEntries();
+  assert(entries[entries.length - 1] === mark);
+  const markEntries = performance.getEntriesByName("test", "mark");
+  assert(markEntries[markEntries.length - 1] === mark);
+});
+
+Deno.test(function performanceMarkDetail() {
+  const detail = { foo: "foo" };
+  const mark = performance.mark("test", { detail });
+  assert(mark instanceof PerformanceMark);
+  assertEquals(mark.detail, { foo: "foo" });
+  assertNotStrictEquals(mark.detail, detail);
+});
+
+Deno.test(function performanceMarkDetailArrayBuffer() {
+  const detail = new ArrayBuffer(10);
+  const mark = performance.mark("test", { detail });
+  assert(mark instanceof PerformanceMark);
+  assertEquals(mark.detail, new ArrayBuffer(10));
+  assertNotStrictEquals(mark.detail, detail);
+});
+
+Deno.test(function performanceMarkDetailSubTypedArray() {
+  class SubUint8Array extends Uint8Array {}
+  const detail = new SubUint8Array([1, 2]);
+  const mark = performance.mark("test", { detail });
+  assert(mark instanceof PerformanceMark);
+  assertEquals(mark.detail, new Uint8Array([1, 2]));
+  assertNotStrictEquals(mark.detail, detail);
+});
+
+Deno.test(function performanceMeasure() {
+  const markName1 = "mark1";
+  const measureName1 = "measure1";
+  const measureName2 = "measure2";
+  const mark1 = performance.mark(markName1);
+  // Measure against the inaccurate-but-known-good wall clock
+  const now = new Date().valueOf();
+  return new Promise((resolve, reject) => {
+    setTimeout(() => {
+      try {
+        const later = new Date().valueOf();
+        const measure1 = performance.measure(measureName1, markName1);
+        const measure2 = performance.measure(
+          measureName2,
+          undefined,
+          markName1,
+        );
+        assert(measure1 instanceof PerformanceMeasure);
+        assertEquals(measure1.detail, null);
+        assertEquals(measure1.name, measureName1);
+        assertEquals(measure1.entryType, "measure");
+        assert(measure1.startTime > 0);
+        assertEquals(measure2.startTime, 0);
+        assertEquals(mark1.startTime, measure1.startTime);
+        assertEquals(mark1.startTime, measure2.duration);
+        assert(
+          measure1.duration >= 100,
+          `duration below 100ms: ${measure1.duration}`,
+        );
+        assert(
+          measure1.duration < (later - now) * 1.50,
+          `duration exceeds 150% of wallclock time: ${measure1.duration}ms vs ${
+            later - now
+          }ms`,
+        );
+        const entries = performance.getEntries();
+        assert(entries[entries.length - 1] === measure2);
+        const entriesByName = performance.getEntriesByName(
+          measureName1,
+          "measure",
+        );
+        assert(entriesByName[entriesByName.length - 1] === measure1);
+        const measureEntries = performance.getEntriesByType("measure");
+        assert(measureEntries[measureEntries.length - 1] === measure2);
+      } catch (e) {
+        return reject(e);
+      }
+      resolve();
+    }, 100);
+  });
+});
+
+Deno.test(function performanceCustomInspectFunction() {
+  assertStringIncludes(Deno.inspect(performance), "Performance");
+  assertStringIncludes(
+    Deno.inspect(Performance.prototype),
+    "Performance",
+  );
+});
+
+Deno.test(function performanceMarkCustomInspectFunction() {
+  const mark1 = performance.mark("mark1");
+  assertStringIncludes(Deno.inspect(mark1), "PerformanceMark");
+  assertStringIncludes(
+    Deno.inspect(PerformanceMark.prototype),
+    "PerformanceMark",
+  );
+});
+
+Deno.test(function performanceMeasureCustomInspectFunction() {
+  const measure1 = performance.measure("measure1");
+  assertStringIncludes(Deno.inspect(measure1), "PerformanceMeasure");
+  assertStringIncludes(
+    Deno.inspect(PerformanceMeasure.prototype),
+    "PerformanceMeasure",
+  );
+});
+
+Deno.test(function performanceIllegalConstructor() {
+  assertThrows(() => new Performance(), TypeError, "Illegal constructor");
+  assertEquals(Performance.length, 0);
+});
+
+Deno.test(function performanceEntryIllegalConstructor() {
+  assertThrows(() => new PerformanceEntry(), TypeError, "Illegal constructor");
+  assertEquals(PerformanceEntry.length, 0);
+});
+
+Deno.test(function performanceMeasureIllegalConstructor() {
+  assertThrows(
+    () => new PerformanceMeasure(),
+    TypeError,
+    "Illegal constructor",
+  );
+});
+
+Deno.test(function performanceIsEventTarget() {
+  assert(performance instanceof EventTarget);
+
+  return new Promise((resolve) => {
+    const handler = () => {
+      resolve();
+    };
+
+    performance.addEventListener("test", handler, { once: true });
+    performance.dispatchEvent(new Event("test"));
+  });
+});