Completes nodeCrawl with empty roots (#3776)

jestjs · Jun 9, 2017 · f3f3473 · f3f3473
1 parent 92e432a
commit f3f3473
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diff --git a/packages/jest-haste-map/src/crawlers/__tests__/node-test.js b/packages/jest-haste-map/src/crawlers/__tests__/node-test.js
@@ -198,4 +198,21 @@ describe('node crawler', () => {
       });
     });
   });
+
+  it('completes with emtpy roots', () => {
+    process.platform = 'win32';
+
+    nodeCrawl = require('../node');
+
+    const files = Object.create(null);
+    return nodeCrawl({
+      data: {files},
+      extensions: ['js'],
+      forceNodeFilesystemAPI: true,
+      ignore: pearMatcher,
+      roots: [],
+    }).then(data => {
+      expect(data.files).toEqual({});
+    });
+  });
 });
diff --git a/packages/jest-haste-map/src/crawlers/node.js b/packages/jest-haste-map/src/crawlers/node.js
@@ -65,7 +65,11 @@ function find(
     });
   }
 
-  roots.forEach(search);
+  if (roots.length > 0) {
+    roots.forEach(search);
+  } else {
+    callback(result);
+  }
 }
 
 function findNative(