Move cli/cmd into cli/internal

cli/internal/cmd/version_test.go

@@ -0,0 +1,25 @@
+package cmd
+
+import (
+	"bytes"
+	"io"
+	"testing"
+
+	"github.com/edgelesssys/constellation/internal/constants"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestVersionCmd(t *testing.T) {
+	assert := assert.New(t)
+
+	cmd := NewVersionCmd()
+	b := &bytes.Buffer{}
+	cmd.SetOut(b)
+
+	err := cmd.Execute()
+	assert.NoError(err)
+
+	s, err := io.ReadAll(b)
+	assert.NoError(err)
+	assert.Contains(string(s), constants.CliVersion)
+}