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function objectUrlFromModule(module) {
const blob = new Blob([module], { type: "text/javascript" });
return URL.createObjectURL(blob);
}
const moduleText = `export const foo = "bar";`;
async_test((t) => {
const moduleBlobUrl = objectUrlFromModule(moduleText);
t.add_cleanup(() => URL.revokeObjectURL(moduleBlobUrl));
const worker = new Worker("./resources/blob-url-worker.js");
worker.postMessage(moduleBlobUrl);
worker.addEventListener(
"message",
t.step_func_done((evt) => {
assert_true(evt.data.importSucceeded);
assert_equals(evt.data.module.foo, "bar");
})
);
}, "A blob URL created in a window agent can be imported from a worker");
async_test((t) => {
const moduleBlobUrl = objectUrlFromModule(moduleText);
URL.revokeObjectURL(moduleBlobUrl);
const worker = new Worker("./resources/blob-url-worker.js");
worker.postMessage(moduleBlobUrl);
worker.addEventListener(
"message",
t.step_func_done((evt) => {
assert_false(evt.data.importSucceeded);
assert_equals(evt.data.errorName, "TypeError");
})
);
}, "A blob URL revoked in a window agent will not resolve in a worker");
promise_test(async (t) => {
const moduleBlobUrl = objectUrlFromModule(moduleText);
await import(moduleBlobUrl);
URL.revokeObjectURL(moduleBlobUrl);
const worker = new Worker("./resources/blob-url-worker.js");
worker.postMessage(moduleBlobUrl);
await new Promise((resolve) => {
worker.addEventListener(
"message",
t.step_func((evt) => {
assert_false(evt.data.importSucceeded);
assert_equals(evt.data.errorName, "TypeError");
resolve();
})
);
});
}, "A revoked blob URL will not resolve in a worker even if it's in the window's module graph");
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