move options to a separate file

driver.go

@@ -35,8 +35,9 @@ func (d *mockDriver) Open(dsn string) (driver.Conn, error) {
 	return c, nil
 }
 
-// New creates sqlmock database connection
-// and a mock to manage expectations.
+// New creates sqlmock database connection and a mock to manage expectations.
+// Accepts options, like ValueConverterOption, to use a ValueConverter from
+// a specific driver.
 // Pings db so that all expectations could be
 // asserted.
 func New(options ...func(*sqlmock) error) (*sql.DB, Sqlmock, error) {
@@ -51,8 +52,10 @@ func New(options ...func(*sqlmock) error) (*sql.DB, Sqlmock, error) {
 	return smock.open(options)
 }
 
-// NewWithDSN creates sqlmock database connection
-// with a specific DSN and a mock to manage expectations.
+// NewWithDSN creates sqlmock database connection with a specific DSN
+// and a mock to manage expectations.
+// Accepts options, like ValueConverterOption, to use a ValueConverter from
+// a specific driver.
 // Pings db so that all expectations could be asserted.
 //
 // This method is introduced because of sql abstraction
@@ -76,12 +79,3 @@ func NewWithDSN(dsn string, options ...func(*sqlmock) error) (*sql.DB, Sqlmock,
 
 	return smock.open(options)
 }
-
-// WithValueConverter allows to create a sqlmock connection
-// with a custom ValueConverter to support drivers with special data types.
-func WithValueConverter(converter driver.ValueConverter) func(*sqlmock) error {
-	return func(s *sqlmock) error {
-		s.converter = converter
-		return nil
-	}
-}

driver_test.go

@@ -100,7 +100,7 @@ func TestTwoOpenConnectionsOnTheSameDSN(t *testing.T) {
 
 func TestWithOptions(t *testing.T) {
 	c := &converter{}
-	_, mock, err := New(WithValueConverter(c))
+	_, mock, err := New(ValueConverterOption(c))
 	if err != nil {
 		t.Errorf("expected no error, but got: %s", err)
 	}

options.go

@@ -0,0 +1,12 @@
+package sqlmock
+
+import "database/sql/driver"
+
+// ValueConverterOption allows to create a sqlmock connection
+// with a custom ValueConverter to support drivers with special data types.
+func ValueConverterOption(converter driver.ValueConverter) func(*sqlmock) error {
+	return func(s *sqlmock) error {
+		s.converter = converter
+		return nil
+	}
+}