| Index: third_party/WebKit/LayoutTests/custom-elements/imports/async-nested-imports.html | 
| diff --git a/third_party/WebKit/LayoutTests/custom-elements/imports/async-nested-imports.html b/third_party/WebKit/LayoutTests/custom-elements/imports/async-nested-imports.html | 
| new file mode 100644 | 
| index 0000000000000000000000000000000000000000..c2643d96aebe509bd8d8f1953fb9834146dd10b7 | 
| --- /dev/null | 
| +++ b/third_party/WebKit/LayoutTests/custom-elements/imports/async-nested-imports.html | 
| @@ -0,0 +1,30 @@ | 
| +<!DOCTYPE html> | 
| +<script src="../../resources/testharness.js"></script> | 
| +<script src="../../resources/testharnessreport.js"></script> | 
| +<script src="../spec/resources/custom-elements-helpers.js"></script> | 
| +<script> | 
| +'use strict'; | 
| + | 
| +let constructors = []; | 
| +</script> | 
| +<link id="import1" rel="import" href="resources/async-nested-component.html" async> | 
| +<script> | 
| +'use strict'; | 
| + | 
| +async_test((test) => { | 
| +  import1.onload = test.step_func_done(() => { | 
| +    let n1 = import1.import.querySelector('a-a'); | 
| +    let n2 = import1.import.querySelector('b-b'); | 
| +    let n3 = import1.import.querySelector('c-c'); | 
| + | 
| +    assert_is_upgraded(n1, NestedLevel1, 'nested-level1 in import should be custom'); | 
| +    assert_is_upgraded(n2, NestedLevel2, 'nested-level2 in import should be custom'); | 
| +    assert_is_upgraded(n3, NestedLevel3, 'nested-level3 in import should be custom'); | 
| + | 
| +    // As subimports are sync, the upgrade order should be the order of script execution. | 
| +    let types = constructors.map(e => e.type); | 
| +    assert_array_equals(types, ['nested-level3', 'nested-level2', 'nested-level1'], | 
| +                        'upgrade order should be the order of script execution in imports'); | 
| +  }, 'top-level async import should properly run dependent subimports and get elements defined.'); | 
| +}, 'custom elements defined in nested imports from an async import should work.'); | 
| +</script> | 
|  |