added unit test

x-pack/plugins/fleet/server/services/agent_policy_create.test.ts

@@ -190,6 +190,35 @@ describe('createAgentPolicyWithPackages', () => {
     );
   });
 
+  it('should call deploy policy once when create policy with system package', async () => {
+    mockedAgentPolicyService.deployPolicy.mockClear();
+    mockedAgentPolicyService.create.mockImplementation((soClient, esClient, newPolicy, options) => {
+      if (!options?.skipDeploy) {
+        mockedAgentPolicyService.deployPolicy(soClientMock, 'new_id');
+      }
+      return Promise.resolve({
+        ...newPolicy,
+        id: options?.id || 'new_id',
+      } as AgentPolicy);
+    });
+    const response = await createAgentPolicyWithPackages({
+      esClient: esClientMock,
+      soClient: soClientMock,
+      newPolicy: { name: 'Agent policy 1', namespace: 'default' },
+      withSysMonitoring: true,
+      spaceId: 'default',
+    });
+
+    expect(response.id).toEqual('new_id');
+    expect(mockedBulkInstallPackages).toHaveBeenCalledWith({
+      savedObjectsClient: soClientMock,
+      esClient: esClientMock,
+      packagesToInstall: ['system'],
+      spaceId: 'default',
+    });
+    expect(mockedAgentPolicyService.deployPolicy).toHaveBeenCalledTimes(1);
+  });
+
   it('should create policy with system and elastic_agent package', async () => {
     const response = await createAgentPolicyWithPackages({
       esClient: esClientMock,