#RI-3704-add database util test

Author: AmirAllayarovSofteq

redisinsight/api/src/modules/database/utils/database.total.util.spec.ts

@@ -0,0 +1,56 @@
+import IORedis, { Command } from 'ioredis';
+import { when } from 'jest-when';
+import { getTotal } from 'src/modules/database/utils/database.total.util';
+
+const nodeClient = Object.create(IORedis.prototype);
+nodeClient.sendCommand = jest.fn();
+
+const mockRedisKeyspaceInfoResponse: string = '# Keyspace\r\ndb0:keys=2,expires=0,avg_ttl=0\r\n';
+const mockRedisKeyspaceInfoResponseNoKeyspaceData: string = '# Keyspace\r\n \r\n';
+
+describe('getTotalFromInfo', () => {
+  it('Should return total from dbsize', () => {
+    when(nodeClient.sendCommand)
+      .calledWith(jasmine.objectContaining({ name: 'dbsize' }))
+      .mockResolvedValue('1');
+    return getTotal(nodeClient).then((total) => {
+      expect(total).toBe(1);
+    });
+  });
+
+  it('Should return total from info when dbsize execute with error', () => {
+    when(nodeClient.sendCommand)
+      .calledWith(jasmine.objectContaining({ name: 'dbsize' }))
+      .mockRejectedValue('some error');
+    when(nodeClient.sendCommand)
+      .calledWith(jasmine.objectContaining({ name: 'info' }))
+      .mockResolvedValue(mockRedisKeyspaceInfoResponse);
+    return getTotal(nodeClient).then((total) => {
+      expect(total).toBe(2);
+    });
+  });
+
+  it('Should return 0', () => {
+    when(nodeClient.sendCommand)
+      .calledWith(jasmine.objectContaining({ name: 'dbsize' }))
+      .mockRejectedValue('some error');
+    when(nodeClient.sendCommand)
+      .calledWith(jasmine.objectContaining({ name: 'info' }))
+      .mockResolvedValue(mockRedisKeyspaceInfoResponseNoKeyspaceData);
+    return getTotal(nodeClient).then((total) => {
+      expect(total).toBe(0);
+    });
+  });
+
+  it('Should return -1 when dbsize and info execute with errors', () => {
+    when(nodeClient.sendCommand)
+      .calledWith(jasmine.objectContaining({ name: 'dbsize' }))
+      .mockRejectedValue('some error');
+    when(nodeClient.sendCommand)
+      .calledWith(jasmine.objectContaining({ name: 'info' }))
+      .mockRejectedValue('some error');
+    return getTotal(nodeClient).then((total) => {
+      expect(total).toBe(-1);
+    });
+  });
+});