add total test

pkg/voucher/parser_test.go

@@ -28,6 +28,32 @@ func TestParseRules_SimpleSku(t *testing.T) {
 	}
 }
 
+func TestRuleCartTotal(t *testing.T) {
+	rs, err := ParseRules("min_total>=500000")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if len(rs.Conditions) != 1 {
+		t.Fatalf("expected 1 condition got %d", len(rs.Conditions))
+	}
+	c := rs.Conditions[0]
+	if c.Kind != RuleMinTotal {
+		t.Fatalf("expected kind cart total got %s", c.Kind)
+	}
+	ctx := EvalContext{
+		Items: []Item{
+			Item{
+				Sku: "123",
+			},
+		},
+		CartTotalInc: 400000,
+	}
+	applied := rs.Applies(ctx)
+	if applied {
+		t.Fatalf("expected")
+	}
+}
+
 func TestParseRules_CategoryAndSkuMixedSeparators(t *testing.T) {
 	rs, err := ParseRules("  category=Shoes|Bags ; sku= A | B , min_total>=1000\nmin_item_price>=500")
 	if err != nil {