testing: cover validate command error paths

Author: malsomesh9

node/validate/validate_test.go

@@ -8,6 +8,7 @@ package validate
 
 import (
 	"bytes"
+	"errors"
 	"os"
 	"path/filepath"
 	"testing"
@@ -38,6 +39,16 @@ func TestValidateMissingID(t *testing.T) {
 	require.EqualError(t, err, "missing fsc.id in configuration")
 }
 
+func TestValidateMissingConfig(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+
+	_, err := Validate(dir)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "core.yaml")
+}
+
 func TestCmd(t *testing.T) {
 	t.Parallel()
 
@@ -55,3 +66,51 @@ func TestCmd(t *testing.T) {
 	require.NoError(t, err)
 	require.Contains(t, out.String(), filepath.Join(dir, "core.yaml"))
 }
+
+func TestCmdTrailingArgs(t *testing.T) {
+	t.Parallel()
+
+	cmd := Cmd()
+	cmd.SetArgs([]string{"unexpected"})
+
+	err := cmd.Execute()
+	require.EqualError(t, err, "trailing args detected")
+	require.False(t, cmd.SilenceUsage)
+}
+
+func TestCmdValidateError(t *testing.T) {
+	t.Parallel()
+
+	cmd := Cmd()
+	var out bytes.Buffer
+	cmd.SetOut(&out)
+	cmd.SetErr(&out)
+	cmd.SetArgs([]string{"--config-path", t.TempDir()})
+
+	err := cmd.Execute()
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "core.yaml")
+	require.True(t, cmd.SilenceUsage)
+}
+
+func TestCmdWriteError(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	err := os.WriteFile(filepath.Join(dir, "core.yaml"), []byte("fsc:\n  id: node1\n"), 0o600)
+	require.NoError(t, err)
+
+	cmd := Cmd()
+	cmd.SetOut(failingWriter{})
+	cmd.SetErr(bytes.NewBuffer(nil))
+	cmd.SetArgs([]string{"--config-path", dir})
+
+	err = cmd.Execute()
+	require.EqualError(t, err, "write failed")
+}
+
+type failingWriter struct{}
+
+func (failingWriter) Write(p []byte) (int, error) {
+	return 0, errors.New("write failed")
+}