add between operator

Author: LeandroSNunes

querybuilder/operator/between.go

@@ -0,0 +1,43 @@
+package operator
+
+import (
+	"reflect"
+	"time"
+)
+
+func init() {
+	AddOperator(Between)
+}
+
+// Between
+var Between = &Operator{
+	Name: "between",
+	Evaluate: func(input, value interface{}) bool {
+		rvalue := reflect.ValueOf(value)
+		if rvalue.Kind() != reflect.Slice {
+			return false
+		}
+
+		v := value.([]interface{})
+
+		switch input.(type) {
+		case float64:
+			i := input.(float64)
+			sv := v[0].(float64)
+			ev := v[1].(float64)
+			return i > sv && i < ev
+		case int:
+			i := input.(int)
+			sv := v[0].(int)
+			ev := v[1].(int)
+			return i > sv && i < ev
+		case time.Time:
+			i := input.(time.Time)
+			sv := v[0].(time.Time)
+			ev := v[1].(time.Time)
+			return i.After(sv) && i.Before(ev)
+		default:
+			return false
+		}
+	},
+}

querybuilder/operator/between_test.go

@@ -0,0 +1,36 @@
+package operator
+
+import (
+	"reflect"
+	"testing"
+	"time"
+)
+
+func TestBetween(t *testing.T) {
+	sd := time.Date(0001, 1, 1, 9, 0, 0, 0, time.UTC)
+	ed := time.Date(0001, 1, 1, 10, 0, 0, 0, time.UTC)
+
+	var inputs = []struct {
+		title string
+		value interface{}
+		input interface{}
+		want  bool
+	}{
+		{title: "double", value: []interface{}{1.5, 10.5}, input: 5.0, want: true},
+		{title: "double_f", value: []interface{}{1.5, 10.5}, input: 10.6, want: false},
+		{title: "integer", value: []interface{}{1, 10}, input: 5, want: true},
+		{title: "integer_f", value: []interface{}{1, 10}, input: 11, want: false},
+		{title: "time", value: []interface{}{sd, ed}, input: time.Date(0001, 1, 1, 9, 30, 0, 0, time.UTC), want: true},
+		{title: "time_f", value: []interface{}{sd, ed}, input: time.Date(0001, 1, 1, 10, 30, 0, 0, time.UTC), want: false},
+	}
+
+	for _, input := range inputs {
+		t.Run(input.title, func(t *testing.T) {
+			got := Between.Evaluate(input.input, input.value)
+			rv := reflect.ValueOf(input.value)
+			if got != input.want {
+				t.Errorf("%v between %v and %v got: %t, want: %t", input.input, rv.Index(0), rv.Index(1), got, input.want)
+			}
+		})
+	}
+}