From cb9bda810fae9bb49ee25d2059dddbec53766ad7 Mon Sep 17 00:00:00 2001
From: Peter Holmberg <peter.hlmbrg@gmail.com>
Date: Mon, 18 Mar 2019 11:21:40 +0100
Subject: [PATCH] test

---
 public/app/core/utils/query.test.ts | 30 +++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 public/app/core/utils/query.test.ts

diff --git a/public/app/core/utils/query.test.ts b/public/app/core/utils/query.test.ts
new file mode 100644
index 00000000000..a69162751a4
--- /dev/null
+++ b/public/app/core/utils/query.test.ts
@@ -0,0 +1,30 @@
+import { DataQuery } from '@grafana/ui';
+import { getNextRefIdChar } from './query';
+
+const dataQueries: DataQuery[] = [
+  {
+    refId: 'A',
+  },
+  {
+    refId: 'B',
+  },
+  {
+    refId: 'C',
+  },
+  {
+    refId: 'D',
+  },
+  {
+    refId: 'E',
+  },
+];
+
+describe('Get next refId char', () => {
+  it('should return next char', () => {
+    expect(getNextRefIdChar(dataQueries)).toEqual('F');
+  });
+
+  it('should get first char', () => {
+    expect(getNextRefIdChar([])).toEqual('A');
+  });
+});