experimental feature, algorithm/sorter.go try to implements sort function with go generics

algorithm/sorter_test.go

@@ -0,0 +1,58 @@
+package algorithm
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/duke-git/lancet/internal"
+)
+
+// People test mock data
+type People struct {
+	Name string
+	Age  int
+}
+
+// PeopleAageComparator sort people slice by age field
+type PeopleAageComparator struct{}
+
+// Compare implements github.com/duke-git/lancet/lancetconstraints/constraints.go/Comparator
+func (pc *PeopleAageComparator) Compare(v1 interface{}, v2 interface{}) int {
+	p1, _ := v1.(People)
+	p2, _ := v2.(People)
+
+	//ascending order
+	if p1.Age < p2.Age {
+		return -1
+	} else if p1.Age > p2.Age {
+		return 1
+	}
+	return 0
+
+	//decending order
+	// if p1.Age > p2.Age {
+	// 	return -1
+	// } else if p1.Age < p2.Age {
+	// 	return 1
+	// }
+}
+
+var peoples = []People{
+	{Name: "a", Age: 20},
+	{Name: "b", Age: 10},
+	{Name: "c", Age: 17},
+	{Name: "d", Age: 8},
+	{Name: "e", Age: 28},
+}
+
+func TestSelectionSort(t *testing.T) {
+	asssert := internal.NewAssert(t, "TestSelectionSort")
+	comparator := &PeopleAageComparator{}
+	sortedPeopleByAge := SelectionSort(peoples, comparator)
+	t.Log(sortedPeopleByAge)
+
+	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
+	actual := fmt.Sprintf("%v", sortedPeopleByAge)
+
+	asssert.Equal(expected, actual)
+}