1 files changed, 67 insertions, 0 deletions
diff --git a/cmd/rr/command_test.go b/cmd/rr/command_test.go
new file mode 100644
index 00000000..0e111f4b
--- /dev/null
+++ b/cmd/rr/command_test.go
@@ -0,0 +1,67 @@
+package main
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func Test_Main(t *testing.T) {
+	os.Args = []string{"", "--help"}
+	exitFn = func(code int) { assert.Equal(t, 0, code) }
+
+	r, w, err := os.Pipe()
+	require.NoError(t, err)
+	os.Stdout = w
+
+	main()
+	_ = w.Close()
+	buf := new(bytes.Buffer)
+	_, err = io.Copy(buf, r)
+	require.NoError(t, err)
+
+	assert.Contains(t, buf.String(), "Usage:")
+	assert.Contains(t, buf.String(), "Available Commands:")
+	assert.Contains(t, buf.String(), "Flags:")
+}
+
+func Test_MainWithoutCommands(t *testing.T) {
+	os.Args = []string{""}
+	exitFn = func(code int) { assert.Equal(t, 0, code) }
+
+	r, w, err := os.Pipe()
+	require.NoError(t, err)
+	os.Stdout = w
+
+	main()
+	_ = w.Close()
+	buf := new(bytes.Buffer)
+	_, err = io.Copy(buf, r)
+	require.NoError(t, err)
+
+	assert.Contains(t, buf.String(), "Usage:")
+	assert.Contains(t, buf.String(), "Available Commands:")
+	assert.Contains(t, buf.String(), "Flags:")
+}
+
+func Test_MainUnknownSubcommand(t *testing.T) {
+	os.Args = []string{"", "foobar"}
+	exitFn = func(code int) { assert.Equal(t, 1, code) }
+
+	r, w, err := os.Pipe()
+	require.NoError(t, err)
+	os.Stderr = w
+
+	main()
+	_ = w.Close()
+	buf := new(bytes.Buffer)
+	_, err = io.Copy(buf, r)
+	require.NoError(t, err)
+
+	assert.Contains(t, buf.String(), "unknown command")
+	assert.Contains(t, buf.String(), "foobar")
+}