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Test Info:
- Manifest: dom/base/test/jsmodules/mochitest.toml
<!DOCTYPE html>
<meta charset=utf-8>
<title>Test import() when a dependency fails to load</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script>
SimpleTest.waitForExplicitFinish();
// Modules push their name here when they are evaluated.
window.evaluatedModules = [];
let errorCount = 0;
window.onerror = () => {
errorCount++;
};
// In all of these cases the dynamically imported module script itself is
// fetched and compiled successfully, and only loading its dependencies
// fails. The import must reject, and the module must never be linked or
// evaluated, even though the load request ends up in the ScriptLoader's
// loaded list and is processed again by ProcessDynamicImport().
async function testDependencyLoadFailure(specifier, description) {
await import(specifier).then(
() => {
ok(false, `${description}: import() should not resolve`);
},
error => {
ok(error instanceof TypeError, `${description}: rejects with TypeError`);
}
);
// Give the errored request a chance to be processed again before checking
// that nothing was evaluated.
await new Promise(resolve => SimpleTest.executeSoon(resolve));
is(
window.evaluatedModules.join(),
"",
`${description}: no module should be evaluated`
);
is(errorCount, 0, `${description}: no error should be reported`);
}
// eslint-disable-next-line no-unused-vars
async function testLoaded() {
await testDependencyLoadFailure(
"./import_404_evaluated.mjs",
"direct dependency fails to load"
);
// The module script of the previous case is now in the module map, but its
// dependency still fails to load.
await testDependencyLoadFailure(
"./import_404_evaluated.mjs",
"repeated import of the same module"
);
await testDependencyLoadFailure(
"./import_404_indirect.mjs",
"transitive dependency fails to load"
);
await testDependencyLoadFailure(
"./import_404_sibling.mjs",
"one of two dependencies fails to load"
);
SimpleTest.finish();
}
</script>
<body onload='testLoaded()'></body>