feat(Go-StudyExample):2020/12/31：新增【Go每日一库】go-cmp结构体比较工具

example/go-cmp/SliceMap_test.go

@@ -0,0 +1,50 @@
+/*
+ *  @Author : huangzj
+ *  @Time : 2020/12/30 14:08
+ *  @Description：map和切片的比较方法
+ */
+
+package go_cmp
+
+import (
+	"fmt"
+	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-cmp/cmp/cmpopts"
+	"testing"
+)
+
+func TestNilEqualEmpty(t *testing.T) {
+	var s1 []int
+	var s2 = make([]int, 0)
+
+	var m1 map[int]int
+	var m2 = make(map[int]int)
+
+	//Go原生的" == "符号是没办法比较 切片和map的.
+	//fmt.Println(s1 == s2)
+	//fmt.Println(m1 == m2)
+
+	//这边可以通过Equal来比较 切片和map
+	fmt.Println("s1 equals s2?", cmp.Equal(s1, s2))
+	fmt.Println("m1 equals m2?", cmp.Equal(m1, m2))
+
+	//空的切片和nil如果要比较相等，需要加上对应的参数
+	fmt.Println("s1 equals s2 with option?", cmp.Equal(s1, s2, cmpopts.EquateEmpty()))
+	fmt.Println("m1 equals m2 with option?", cmp.Equal(m1, m2, cmpopts.EquateEmpty()))
+
+}
+
+//比较无序的切片，和本来就没有顺序的map
+func TestSliceOutOfOrder(t *testing.T) {
+	s1 := []int{1, 2, 3, 4}
+	s2 := []int{4, 3, 2, 1}
+	fmt.Println("s1 equals s2?", cmp.Equal(s1, s2))
+	fmt.Println("s1 equals s2 with option?", cmp.Equal(s1, s2, cmpopts.SortSlices(func(i, j int) bool { return i < j })))
+
+	fmt.Println()
+
+	m1 := map[int]int{1: 10, 2: 20, 3: 30}
+	m2 := map[int]int{1: 10, 2: 20, 3: 30}
+	fmt.Println("m1 equals m2?", cmp.Equal(m1, m2))
+	fmt.Println("m1 equals m2 with option?", cmp.Equal(m1, m2, cmpopts.SortMaps(func(i, j int) bool { return i < j })))
+}