add delete test

delete_test.go

@@ -0,0 +1,28 @@
+package sqlbuilder
+
+import "testing"
+
+func TestDelete(t *testing.T) {
+	cases := []struct {
+		query     *DeleteBuilder
+		wantQuery string
+		args      []interface{}
+	}{
+		{
+			query:     DeleteFrom("products"),
+			wantQuery: "DELETE FROM products",
+		},
+		{
+			query:     DeleteFrom("products").Where(Like("title", "%airpod%")),
+			wantQuery: "DELETE FROM products WHERE title LIKE $1",
+			args:      []interface{}{"airpod"},
+		},
+	}
+
+	for _, c := range cases {
+		q, args := c.query.Query()
+		if q != c.wantQuery || len(c.args) != len(args) {
+			t.Errorf("want:\n %s\n got:\n %s\n", c.wantQuery, q)
+		}
+	}
+}