1 files changed, 82 insertions, 0 deletions
diff --git a/dom/file/tests/common_blob_types.js b/dom/file/tests/common_blob_types.js
new file mode 100644
index 0000000000..95501e58e5
--- /dev/null
+++ b/dom/file/tests/common_blob_types.js
@@ -0,0 +1,82 @@
+let blobTypes = [
+  {
+    type: "memory",
+    factory: async content => {
+      return new Blob([content]);
+    },
+    blobImplType: "MultipartBlobImpl[StringBlobImpl]",
+  },
+
+  {
+    type: "ipcBlob",
+    factory: async content => {
+      return new Promise(resolve => {
+        let bc1 = new BroadcastChannel("blob tests");
+        bc1.onmessage = e => {
+          resolve(e.data);
+        };
+
+        let bc2 = new BroadcastChannel("blob tests");
+        bc2.postMessage(new Blob([content]));
+      });
+    },
+    blobImplType:
+      "StreamBlobImpl[StreamBlobImpl[MultipartBlobImpl[StringBlobImpl]]]",
+  },
+
+  {
+    type: "memoryBlob",
+    factory: async content => {
+      return 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(content);
+        xhr.onloadend = _ => {
+          resolve(xhr.response);
+        };
+      });
+    },
+    blobImplType: "MemoryBlobImpl",
+  },
+
+  {
+    type: "temporaryBlob",
+    factory: async content => {
+      await SpecialPowers.pushPrefEnv({
+        set: [["dom.blob.memoryToTemporaryFile", 1]],
+      });
+
+      return 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(content);
+        xhr.onloadend = _ => {
+          resolve(xhr.response);
+        };
+      });
+    },
+    blobImplType: "StreamBlobImpl[TemporaryFileBlobImpl]",
+  },
+];
+
+async function forEachBlobType(content, cb) {
+  for (let i = 0; i < blobTypes.length; ++i) {
+    info("Running tests for " + blobTypes[i].type);
+    let blob = await blobTypes[i].factory(content);
+    is(
+      SpecialPowers.wrap(blob).blobImplType,
+      blobTypes[i].blobImplType,
+      "Correct blobImplType"
+    );
+    ok(blob instanceof Blob, "Blob created");
+    await cb(blob, content);
+  }
+}