1 files changed, 92 insertions, 0 deletions
diff --git a/tests/unit/image_bitmap_test.ts b/tests/unit/image_bitmap_test.ts
new file mode 100644
index 000000000..364f2a167
--- /dev/null
+++ b/tests/unit/image_bitmap_test.ts
@@ -0,0 +1,92 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+
+import { assertEquals } from "./test_util.ts";
+
+function generateNumberedData(n: number): Uint8ClampedArray {
+  return new Uint8ClampedArray(
+    Array.from({ length: n }, (_, i) => [i + 1, 0, 0, 1]).flat(),
+  );
+}
+
+Deno.test(async function imageBitmapDirect() {
+  const data = generateNumberedData(3);
+  const imageData = new ImageData(data, 3, 1);
+  const imageBitmap = await createImageBitmap(imageData);
+  assertEquals(
+    // @ts-ignore: Deno[Deno.internal].core allowed
+    Deno[Deno.internal].getBitmapData(imageBitmap),
+    new Uint8Array(data.buffer),
+  );
+});
+
+Deno.test(async function imageBitmapCrop() {
+  const data = generateNumberedData(3 * 3);
+  const imageData = new ImageData(data, 3, 3);
+  const imageBitmap = await createImageBitmap(imageData, 1, 1, 1, 1);
+  assertEquals(
+    // @ts-ignore: Deno[Deno.internal].core allowed
+    Deno[Deno.internal].getBitmapData(imageBitmap),
+    new Uint8Array([5, 0, 0, 1]),
+  );
+});
+
+Deno.test(async function imageBitmapCropPartialNegative() {
+  const data = generateNumberedData(3 * 3);
+  const imageData = new ImageData(data, 3, 3);
+  const imageBitmap = await createImageBitmap(imageData, -1, -1, 2, 2);
+  // @ts-ignore: Deno[Deno.internal].core allowed
+  // deno-fmt-ignore
+  assertEquals(Deno[Deno.internal].getBitmapData(imageBitmap), new Uint8Array([
+    0, 0, 0, 0,   0, 0, 0, 0,
+    0, 0, 0, 0,   1, 0, 0, 1
+  ]));
+});
+
+Deno.test(async function imageBitmapCropGreater() {
+  const data = generateNumberedData(3 * 3);
+  const imageData = new ImageData(data, 3, 3);
+  const imageBitmap = await createImageBitmap(imageData, -1, -1, 5, 5);
+  // @ts-ignore: Deno[Deno.internal].core allowed
+  // deno-fmt-ignore
+  assertEquals(Deno[Deno.internal].getBitmapData(imageBitmap), new Uint8Array([
+    0, 0, 0, 0,   0, 0, 0, 0,   0, 0, 0, 0,   0, 0, 0, 0,   0, 0, 0, 0,
+    0, 0, 0, 0,   1, 0, 0, 1,   2, 0, 0, 1,   3, 0, 0, 1,   0, 0, 0, 0,
+    0, 0, 0, 0,   4, 0, 0, 1,   5, 0, 0, 1,   6, 0, 0, 1,   0, 0, 0, 0,
+    0, 0, 0, 0,   7, 0, 0, 1,   8, 0, 0, 1,   9, 0, 0, 1,   0, 0, 0, 0,
+    0, 0, 0, 0,   0, 0, 0, 0,   0, 0, 0, 0,   0, 0, 0, 0,   0, 0, 0, 0,
+  ]));
+});
+
+Deno.test(async function imageBitmapScale() {
+  const data = generateNumberedData(3);
+  const imageData = new ImageData(data, 3, 1);
+  const imageBitmap = await createImageBitmap(imageData, {
+    resizeHeight: 5,
+    resizeWidth: 5,
+    resizeQuality: "pixelated",
+  });
+  // @ts-ignore: Deno[Deno.internal].core allowed
+  // deno-fmt-ignore
+  assertEquals(Deno[Deno.internal].getBitmapData(imageBitmap), new Uint8Array([
+    1, 0, 0, 1,   1, 0, 0, 1,   2, 0, 0, 1,   3, 0, 0, 1,   3, 0, 0, 1,
+    1, 0, 0, 1,   1, 0, 0, 1,   2, 0, 0, 1,   3, 0, 0, 1,   3, 0, 0, 1,
+    1, 0, 0, 1,   1, 0, 0, 1,   2, 0, 0, 1,   3, 0, 0, 1,   3, 0, 0, 1,
+    1, 0, 0, 1,   1, 0, 0, 1,   2, 0, 0, 1,   3, 0, 0, 1,   3, 0, 0, 1,
+    1, 0, 0, 1,   1, 0, 0, 1,   2, 0, 0, 1,   3, 0, 0, 1,   3, 0, 0, 1
+  ]));
+});
+
+Deno.test(async function imageBitmapFlipY() {
+  const data = generateNumberedData(9);
+  const imageData = new ImageData(data, 3, 3);
+  const imageBitmap = await createImageBitmap(imageData, {
+    imageOrientation: "flipY",
+  });
+  // @ts-ignore: Deno[Deno.internal].core allowed
+  // deno-fmt-ignore
+  assertEquals(Deno[Deno.internal].getBitmapData(imageBitmap), new Uint8Array([
+    7, 0, 0, 1,   8, 0, 0, 1,   9, 0, 0, 1,
+    4, 0, 0, 1,   5, 0, 0, 1,   6, 0, 0, 1,
+    1, 0, 0, 1,   2, 0, 0, 1,   3, 0, 0, 1,
+  ]));
+});