1 files changed, 36 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fetch/range/resources/utils.js b/testing/web-platform/tests/fetch/range/resources/utils.js
new file mode 100644
index 0000000000..ad2853b33d
--- /dev/null
+++ b/testing/web-platform/tests/fetch/range/resources/utils.js
@@ -0,0 +1,36 @@
+function loadScript(url, { doc = document }={}) {
+  return new Promise((resolve, reject) => {
+    const script = doc.createElement('script');
+    script.onload = () => resolve();
+    script.onerror = () => reject(Error("Script load failed"));
+    script.src = url;
+    doc.body.appendChild(script);
+  })
+}
+
+function preloadImage(url, { doc = document }={}) {
+  return new Promise((resolve, reject) => {
+    const preload = doc.createElement('link');
+    preload.rel = 'preload';
+    preload.as = 'image';
+    preload.onload = () => resolve();
+    preload.onerror = () => resolve();
+    preload.href = url;
+    doc.body.appendChild(preload);
+  })
+}
+
+/**
+ *
+ * @param {Document} document
+ * @param {string|URL} url
+ * @returns {HTMLAudioElement}
+ */
+function appendAudio(document, url) {
+  const audio = document.createElement('audio');
+  audio.muted = true;
+  audio.src = url;
+  audio.preload = true;
+  document.body.appendChild(audio);
+  return audio;
+}