1 files changed, 71 insertions, 0 deletions
diff --git a/dom/xhr/tests/browser_temporaryFile.js b/dom/xhr/tests/browser_temporaryFile.js
new file mode 100644
index 0000000000..c3694d9237
--- /dev/null
+++ b/dom/xhr/tests/browser_temporaryFile.js
@@ -0,0 +1,71 @@
+add_task(async _ => {
+  await new Promise(resolve => {
+    var xhr = new XMLHttpRequest();
+    xhr.open(
+      "POST",
+      "http://mochi.test:8888/browser/dom/xhr/tests/temporaryFileBlob.sjs"
+    );
+    xhr.responseType = "blob";
+    xhr.send("");
+    xhr.onloadend = __ => {
+      is(xhr.response.blobImplType, "EmptyBlobImpl", "We want a EmptyBlobImpl");
+      resolve();
+    };
+  });
+});
+
+add_task(async _ => {
+  var data = new Array(2).join("1234567890ABCDEF");
+
+  await new Promise(resolve => {
+    var xhr = new XMLHttpRequest();
+    xhr.open(
+      "POST",
+      "http://mochi.test:8888/browser/dom/xhr/tests/temporaryFileBlob.sjs"
+    );
+    xhr.responseType = "blob";
+    xhr.send({
+      toString() {
+        return data;
+      },
+    });
+    xhr.onloadend = __ => {
+      is(
+        xhr.response.blobImplType,
+        "MemoryBlobImpl",
+        "We want a MemoryBlobImpl"
+      );
+      resolve();
+    };
+  });
+});
+
+add_task(async _ => {
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.blob.memoryToTemporaryFile", 1]],
+  });
+
+  var data = new Array(2).join("1234567890ABCDEF");
+
+  await new Promise(resolve => {
+    var xhr = new XMLHttpRequest();
+    xhr.open(
+      "POST",
+      "http://mochi.test:8888/browser/dom/xhr/tests/temporaryFileBlob.sjs"
+    );
+    xhr.responseType = "blob";
+    xhr.send({
+      toString() {
+        return data;
+      },
+    });
+    xhr.onloadend = __ => {
+      is(
+        xhr.response.blobImplType,
+        "StreamBlobImpl[TemporaryFileBlobImpl]",
+        "We want a StreamBlobImpl holding a TemporaryFileBlobImpl on the parent side"
+      );
+      resolve();
+    };
+  });
+});