fix TestKeystoreRemoveMultipleExistingKeys

Author: AndersonQ

libbeat/tests/integration/cmd_keystore_test.go

@@ -100,19 +100,23 @@ func TestKeystoreRemoveMultipleExistingKeys(t *testing.T) {
 	mockbeat.Stop()
 
 	mockbeat.Start("keystore", "add", "key1", "--stdin")
-	fmt.Fprintf(os.Stdin, "pass1")
+
+	fmt.Fprintf(mockbeat.stdin, "pass1")
+	require.NoError(t, mockbeat.stdin.Close(), "could not close mockbeat stdin")
 	procState, err := mockbeat.Process.Wait()
 	require.NoError(t, err)
 	require.Equal(t, 0, procState.ExitCode(), "incorrect exit code")
 
 	mockbeat.Start("keystore", "add", "key2", "--stdin")
-	fmt.Fprintf(os.Stdin, "pass2")
+	fmt.Fprintf(mockbeat.stdin, "pass2")
+	require.NoError(t, mockbeat.stdin.Close(), "could not close mockbeat stdin")
 	procState, err = mockbeat.Process.Wait()
 	require.NoError(t, err)
 	require.Equal(t, 0, procState.ExitCode(), "incorrect exit code")
 
 	mockbeat.Start("keystore", "add", "key3", "--stdin")
-	fmt.Fprintf(os.Stdin, "pass3")
+	fmt.Fprintf(mockbeat.stdin, "pass3")
+	require.NoError(t, mockbeat.stdin.Close(), "could not close mockbeat stdin")
 	procState, err = mockbeat.Process.Wait()
 	require.NoError(t, err)
 	require.Equal(t, 0, procState.ExitCode(), "incorrect exit code")