From bd141fec9241e93c1ac8f3f538146108ff33e87e Mon Sep 17 00:00:00 2001
From: Nuno Cruces <ncruces@users.noreply.github.com>
Date: Mon, 12 Aug 2024 17:50:23 +0100
Subject: [PATCH] Tests.

---
 driver/driver.go       |  2 +-
 driver/driver_test.go  | 12 ++++++++++++
 internal/util/error.go |  1 -
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/driver/driver.go b/driver/driver.go
index 575b87d..c02ba4b 100644
--- a/driver/driver.go
+++ b/driver/driver.go
@@ -109,7 +109,7 @@ func init() {
 func Open(dataSourceName string, fn ...func(*sqlite3.Conn) error) (*sql.DB, error) {
 	var drv SQLite
 	if len(fn) > 2 {
-		return nil, util.ArgErr
+		return nil, sqlite3.MISUSE
 	}
 	if len(fn) > 1 {
 		drv.term = fn[1]
diff --git a/driver/driver_test.go b/driver/driver_test.go
index dba6b76..97b331c 100644
--- a/driver/driver_test.go
+++ b/driver/driver_test.go
@@ -17,6 +17,18 @@ import (
 	"github.com/ncruces/go-sqlite3/vfs/memdb"
 )
 
+func Test_Open_error(t *testing.T) {
+	t.Parallel()
+
+	_, err := Open("", nil, nil, nil)
+	if err == nil {
+		t.Error("want error")
+	}
+	if !errors.Is(err, sqlite3.MISUSE) {
+		t.Errorf("got %v, want sqlite3.MISUSE", err)
+	}
+}
+
 func Test_Open_dir(t *testing.T) {
 	t.Parallel()
 
diff --git a/internal/util/error.go b/internal/util/error.go
index 8ac52c5..2aecac9 100644
--- a/internal/util/error.go
+++ b/internal/util/error.go
@@ -12,7 +12,6 @@ func (e ErrorString) Error() string { return string(e) }
 const (
 	NilErr       = ErrorString("sqlite3: invalid memory address or null pointer dereference")
 	OOMErr       = ErrorString("sqlite3: out of memory")
-	ArgErr       = ErrorString("sqlite3: invalid argument")
 	RangeErr     = ErrorString("sqlite3: index out of range")
 	NoNulErr     = ErrorString("sqlite3: missing NUL terminator")
 	NoBinaryErr  = ErrorString("sqlite3: no SQLite binary embed/set/loaded")