Make `Blob.prototype.type` more spec compliant

1 files changed, 17 insertions, 0 deletions

diff --git a/test/js/web/fetch/blob.test.ts b/test/js/web/fetch/blob.test.ts
index ba44f8c1b..51b9c0ea8 100644
--- a/test/js/web/fetch/blob.test.ts
+++ b/test/js/web/fetch/blob.test.ts
@@ -28,6 +28,23 @@ test("Blob.slice", () => {
   expect(blob.slice("text/plain;charset=utf-8").type).toBe("text/plain;charset=utf-8");
 });
 
+test("Blob.prototype.type setter", () => {
+  var blob = new Blob(["Bun", "Foo"], { type: "text/foo" });
+  expect(blob.type).toBe("text/foo");
+  blob.type = "text/bar";
+  expect(blob.type).toBe("text/bar");
+  blob.type = "text/baz";
+  expect(blob.type).toBe("text/baz");
+  blob.type = "text/baz; charset=utf-8";
+  expect(blob.type).toBe("text/baz; charset=utf-8");
+  // @ts-expect-error
+  blob.type = NaN;
+  expect(blob.type).toBe("");
+  // @ts-expect-error
+  blob.type = Symbol();
+  expect(blob.type).toBe("");
+});
+
 test("new Blob", () => {
   var blob = new Blob(["Bun", "Foo"], { type: "text/foo" });
   expect(blob.size).toBe(6);