1 files changed, 124 insertions, 0 deletions
diff --git a/dom/indexedDB/test/unit/test_wasm_recompile.js b/dom/indexedDB/test/unit/test_wasm_recompile.js
new file mode 100644
index 000000000..512dc3eff
--- /dev/null
+++ b/dom/indexedDB/test/unit/test_wasm_recompile.js
@@ -0,0 +1,124 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+var testGenerator = testSteps();
+
+function testSteps()
+{
+  const name = "test_wasm_recompile.js";
+
+  const objectStoreName = "Wasm";
+
+  const wasmData = { key: 1, wasm: null };
+
+  // The goal of this test is to prove that wasm is recompiled and the on-disk
+  // copy updated.
+
+  if (!isWasmSupported()) {
+    finishTest();
+    yield undefined;
+  }
+
+  getWasmBinary('(module (func (nop)))');
+  let binary = yield undefined;
+
+  wasmData.wasm = getWasmModule(binary);
+
+  info("Installing profile");
+
+  clearAllDatabases(continueToNextStepSync);
+  yield undefined;
+
+  // The profile was created by an older build (buildId: 20161116145318,
+  // cpuId: X64=0x2). It contains one stored wasm module (file id 1 - bytecode
+  // and file id 2 - compiled/machine code). The file create_db.js in the
+  // package was run locally (specifically it was temporarily added to
+  // xpcshell-parent-process.ini and then executed:
+  // mach xpcshell-test dom/indexedDB/test/unit/create_db.js
+  installPackagedProfile("wasm_recompile_profile");
+
+  let filesDir = getChromeFilesDir();
+
+  let file = filesDir.clone();
+  file.append("2");
+
+  info("Reading out contents of compiled blob");
+
+  let fileReader = new FileReader();
+  fileReader.onload = continueToNextStepSync;
+  fileReader.readAsArrayBuffer(File.createFromNsIFile(file));
+
+  yield undefined;
+
+  let compiledBuffer = fileReader.result;
+
+  info("Opening database");
+
+  let request = indexedDB.open(name);
+  request.onerror = errorHandler;
+  request.onupgradeneeded = unexpectedSuccessHandler;
+  request.onsuccess = continueToNextStepSync;
+  yield undefined;
+
+  // success
+  let db = request.result;
+  db.onerror = errorHandler;
+
+  info("Getting wasm");
+
+  request = db.transaction([objectStoreName])
+              .objectStore(objectStoreName).get(wasmData.key);
+  request.onsuccess = continueToNextStepSync;
+  yield undefined;
+
+  info("Verifying wasm module");
+
+  verifyWasmModule(request.result, wasmData.wasm);
+  yield undefined;
+
+  info("Reading out contents of new compiled blob");
+
+  fileReader = new FileReader();
+  fileReader.onload = continueToNextStepSync;
+  fileReader.readAsArrayBuffer(File.createFromNsIFile(file));
+
+  yield undefined;
+
+  let newCompiledBuffer = fileReader.result;
+
+  info("Verifying blobs differ");
+
+  ok(!compareBuffers(newCompiledBuffer, compiledBuffer), "Blobs differ");
+
+  info("Getting wasm again");
+
+  request = db.transaction([objectStoreName])
+              .objectStore(objectStoreName).get(wasmData.key);
+  request.onsuccess = continueToNextStepSync;
+  yield undefined;
+
+  info("Verifying wasm module");
+
+  verifyWasmModule(request.result, wasmData.wasm);
+  yield undefined;
+
+  info("Reading contents of new compiled blob again");
+
+  fileReader = new FileReader();
+  fileReader.onload = continueToNextStepSync;
+  fileReader.readAsArrayBuffer(File.createFromNsIFile(file));
+
+  yield undefined;
+
+  let newCompiledBuffer2 = fileReader.result;
+
+  info("Verifying blob didn't change");
+
+  ok(compareBuffers(newCompiledBuffer2, newCompiledBuffer),
+     "Blob didn't change");
+
+  finishTest();
+  yield undefined;
+}