add failing test for issue yarnpkg#5954

__tests__/util/version.js

@@ -0,0 +1,29 @@
+/* @flow */
+
+import {explodeHashedUrl} from '../../src/util/version';
+
+describe('getDataDir', () => {
+  test('correctly separates a url with a hash', () => {
+    const expectedUrl = 'git+ssh://git@github.com:org/proj.git';
+    const expectedHash = 'branch'
+    const {url, hash} = explodeHashedUrl(`${expectedUrl}#${expectedHash}`);
+    expect(url).toBe(expectedUrl);
+    expect(hash).toBe(expectedHash);
+  });
+
+  test('returns an empty string as the hash for a url with no hash', () => {
+    const expectedUrl = 'git+ssh://git@github.com:org/proj.git';
+    const expectedHash = ''
+    const {url, hash} = explodeHashedUrl(expectedUrl);
+    expect(url).toBe(expectedUrl);
+    expect(hash).toBe(expectedHash);
+  });
+
+  test('correctly separates a url with a hash in the hash', () => {
+    const expectedUrl = 'git+ssh://git@github.com:org/proj.git';
+    const expectedHash = 'branch#123'
+    const {url, hash} = explodeHashedUrl(`${expectedUrl}#${expectedHash}`);
+    expect(url).toBe(expectedUrl);
+    expect(hash).toBe(expectedHash);
+  });
+});