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build(aio): initialise exampleMap correctly (#22502)

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The `exampleMap` needs to hold an hash object for each
of the `collectExamples.exampleFolders` paths.

Previously these hash objects were only created if there
was actually an example file the hash's respective
example folder.  This could cause crashes during
`yarn docs-watch` (and so also `yarn sync-and-serve`)
if no examples were read in for a particular run of
the doc-gen.

PR Close #22502
This commit is contained in:
Pete Bacon Darwin
2018-02-28 20:10:14 +00:00
committed by Alex Eagle
parent 2f0ab7ee98
commit 94707fe795
2 changed files with 7 additions and 1 deletions
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6
aio/tools/transforms/examples-package/processors/collect-examples.spec.js
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@ -25,6 +25,12 @@ describe('collectExampleRegions processor', () => {
describe('$process', () => {
it('should initialise the `exampleMap` even if there are no examples to collect', () => {
processor.$process([]);
expect(exampleMap['examples-1']).toEqual(jasmine.any(Object));
expect(exampleMap['examples-2']).toEqual(jasmine.any(Object));
});
it('should identify example files that are in the exampleFolders', () => {
const docs = [
createDoc('A', 'examples-1/x/app.js'), createDoc('B', 'examples-1/y/index.html'),