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-rw-r--r--dom/tests/mochitest/fetch/utils.js51
1 files changed, 51 insertions, 0 deletions
diff --git a/dom/tests/mochitest/fetch/utils.js b/dom/tests/mochitest/fetch/utils.js
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+++ b/dom/tests/mochitest/fetch/utils.js
@@ -0,0 +1,51 @@
+// Utilities
+// =========
+
+// Helper that uses FileReader or FileReaderSync based on context and returns
+// a Promise that resolves with the text or rejects with error.
+function readAsText(blob) {
+ if (typeof FileReader !== "undefined") {
+ return new Promise(function (resolve, reject) {
+ var fs = new FileReader();
+ fs.onload = function () {
+ resolve(fs.result);
+ };
+ fs.onerror = reject;
+ fs.readAsText(blob);
+ });
+ } else {
+ var fs = new FileReaderSync();
+ return Promise.resolve(fs.readAsText(blob));
+ }
+}
+
+function readAsArrayBuffer(blob) {
+ if (typeof FileReader !== "undefined") {
+ return new Promise(function (resolve, reject) {
+ var fs = new FileReader();
+ fs.onload = function () {
+ resolve(fs.result);
+ };
+ fs.onerror = reject;
+ fs.readAsArrayBuffer(blob);
+ });
+ } else {
+ var fs = new FileReaderSync();
+ return Promise.resolve(fs.readAsArrayBuffer(blob));
+ }
+}
+
+function waitForState(worker, state, context) {
+ return new Promise(resolve => {
+ if (worker.state === state) {
+ resolve(context);
+ return;
+ }
+ worker.addEventListener("statechange", function onStateChange() {
+ if (worker.state === state) {
+ worker.removeEventListener("statechange", onStateChange);
+ resolve(context);
+ }
+ });
+ });
+}