Add unit tests to GetDriverDialect() func

dialect.go

@@ -70,10 +70,7 @@ func (sqlite3Dialect) Placeholder(idx int) string {
 // provided driver string, if the drive is not supported
 // it returns an error
 func GetDriverDialect(driver string) (Dialect, error) {
-	dialect, found := map[string]Dialect{
-		"postgres": &postgresDialect{},
-		"sqlite3":  &sqlite3Dialect{},
-	}[driver]
+	dialect, found := supportedDialects[driver]
 	if !found {
 		return nil, fmt.Errorf("unsupported driver `%s`", driver)
 	}

dialect_test.go

@@ -0,0 +1,24 @@
+package ksql
+
+import (
+	"testing"
+
+	tt "github.com/vingarcia/ksql/internal/testtools"
+)
+
+func TestGetDriverDialect(t *testing.T) {
+	t.Run("should work for all registered drivers", func(t *testing.T) {
+		for drivername, expectedDialect := range supportedDialects {
+			t.Run(drivername, func(t *testing.T) {
+				dialect, err := GetDriverDialect(drivername)
+				tt.AssertNoErr(t, err)
+				tt.AssertEqual(t, dialect, expectedDialect)
+			})
+		}
+	})
+
+	t.Run("should report error if no driver is found", func(t *testing.T) {
+		_, err := GetDriverDialect("non-existing-driver")
+		tt.AssertErrContains(t, err, "unsupported driver", "non-existing-driver")
+	})
+}