fixed InsertBuilder in order, now tests pass

Author: elgris

insert.go

@@ -186,16 +186,16 @@ func (b *InsertBuilder) Suffix(sql string, args ...interface{}) *InsertBuilder {
 // note that it will reset all previous columns and values was set if any
 func (b *InsertBuilder) SetMap(clauses map[string]interface{}) *InsertBuilder {
 	// TODO: replace resetting previous values with extending existing ones?
-	b.columns = make([]string, 0, len(clauses))
-	b.values = make([][]interface{}, 0, len(clauses))
+	cols := make([]string, 0, len(clauses))
+	vals := make([]interface{}, 0, len(clauses))
 
 	for col, val := range clauses {
-		b.columns = append(b.columns, col)
-
-		// may panic here
-
-		b.values = append(b.values, val.([]interface{}))
+		cols = append(cols, col)
+		vals = append(vals, val)
 	}
 
+	b.columns = cols
+	b.values = [][]interface{}{vals}
+
 	return b
 }