1 files changed, 20 insertions, 0 deletions
diff --git a/src/features/chat/adapter/image-encode.test.ts b/src/features/chat/adapter/image-encode.test.ts
new file mode 100644
index 0000000..dbaa8ae
--- /dev/null
+++ b/src/features/chat/adapter/image-encode.test.ts
@@ -0,0 +1,20 @@
+import { describe, expect, it } from "vitest";
+import { convertToJpeg } from "./image-encode";
+
+describe("convertToJpeg (canvas edge — real environment, no mocks)", () => {
+  it("skips non-convertible formats without touching the canvas", async () => {
+    const jpeg = new File([new Uint8Array([0xff, 0xd8])], "photo.jpg", { type: "image/jpeg" });
+    await expect(convertToJpeg(jpeg)).resolves.toBe(null);
+    const gif = new File([new Uint8Array([0x47])], "anim.gif", { type: "image/gif" });
+    await expect(convertToJpeg(gif)).resolves.toBe(null);
+    const unnamed = new File([new Uint8Array([0x00])], "blob", { type: "" });
+    await expect(convertToJpeg(unnamed)).resolves.toBe(null);
+  });
+
+  it("falls back to null on decode failure (no real canvas in this environment)", async () => {
+    const png = new File([new Uint8Array([0x89, 0x50])], "shot.png", { type: "image/png" });
+    // jsdom has no `createImageBitmap` → the decode throws → the failure path
+    // must resolve to `null` (never reject), so sending is never blocked.
+    await expect(convertToJpeg(png)).resolves.toBe(null);
+  });
+});