refactor: prefix with err to match stdlib

main.go

@@ -124,15 +124,15 @@ var (
 	}
 )
 
-type suggestionNotFoundErr struct {
+type errDBNotFound struct {
 	suggestions []string
 }
 
-func (e suggestionNotFoundErr) Error() string {
-	if len(e.suggestions) == 0 {
+func (err errDBNotFound) Error() string {
+	if len(err.suggestions) == 0 {
 		return "no suggestions found"
 	}
-	return fmt.Sprintf("did you mean %q", strings.Join(e.suggestions, ", "))
+	return fmt.Sprintf("did you mean %q", strings.Join(err.suggestions, ", "))
 }
 
 func set(cmd *cobra.Command, args []string) error {
@@ -226,14 +226,14 @@ func deleteDb(cmd *cobra.Command, args []string) error {
 		return err
 	}
 	path, err := findDb(args[0], dbs)
-	var notFoundErr suggestionNotFoundErr
-	if errors.As(err, &notFoundErr) {
+	var errNotFound errDBNotFound
+	if errors.As(err, &errNotFound) {
 		fmt.Printf("%q does not exist, %s\n", args[0], err.Error())
 		os.Exit(1)
 	}
 	if err != nil {
-	  fmt.Printf("unexpected error: %s", err.Error())
-	  os.Exit(1)
+		fmt.Printf("unexpected error: %s", err.Error())
+		os.Exit(1)
 	}
 	var confirmation string
 	fmt.Printf("are you sure you want to delete '%s' and all its contents?(y/n) ", warningStyle.Render(path))
@@ -271,7 +271,7 @@ func findDb(name string, dbs []string) (string, error) {
 				suggestions = append(suggestions, db)
 			}
 		}
-		return "", suggestionNotFoundErr{suggestions: suggestions}
+		return "", errDBNotFound{suggestions: suggestions}
 	}
 	return path, nil
 }

main_test.go

@@ -19,7 +19,7 @@ func TestFindDbs(t *testing.T) {
 		{
 			name: "@spon",
 			dbs:  defaultDbs,
-			err: suggestionNotFoundErr{
+			err: errDBNotFound{
 				suggestions: []string{
 					"@spongebob",
 				},
@@ -28,7 +28,7 @@ func TestFindDbs(t *testing.T) {
 		{
 			name: "@char",
 			dbs:  defaultDbs,
-			err: suggestionNotFoundErr{
+			err: errDBNotFound{
 				suggestions: []string{
 					"@charm.sh.kv.user.default",
 					"@charm.sh.skate.default",
@@ -38,7 +38,7 @@ func TestFindDbs(t *testing.T) {
 		{
 			name: "spon",
 			dbs:  defaultDbs,
-			err: suggestionNotFoundErr{
+			err: errDBNotFound{
 				suggestions: []string{
 					"@spongebob",
 				},
@@ -47,21 +47,21 @@ func TestFindDbs(t *testing.T) {
 		{
 			name: "",
 			dbs:  defaultDbs,
-			err: suggestionNotFoundErr{
+			err: errDBNotFound{
 				suggestions: nil,
 			},
 		},
 		{
 			name: "endo",
 			dbs:  defaultDbs,
-			err: suggestionNotFoundErr{
+			err: errDBNotFound{
 				suggestions: nil,
 			},
 		},
 		{
 			name: "@endo",
 			dbs:  defaultDbs,
-			err: suggestionNotFoundErr{
+			err: errDBNotFound{
 				suggestions: nil,
 			},
 		},
@@ -78,12 +78,12 @@ func TestFindDbs(t *testing.T) {
 			if err == nil {
 				t.Fatalf("expected an error, got: %v", err)
 			}
-			var perr suggestionNotFoundErr
+			var perr errDBNotFound
 			if !errors.As(err, &perr) {
 				t.Fatalf("something went wrong! got: %v", err)
 			}
-			if len(err.(suggestionNotFoundErr).suggestions) !=
-				len(tc.err.(suggestionNotFoundErr).suggestions) {
+			if len(err.(errDBNotFound).suggestions) !=
+				len(tc.err.(errDBNotFound).suggestions) {
 				t.Fatalf("got != want. got: %v, want: %v", err, tc.err)
 			}
 		}