init commit

archive/go/interface_test.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type If interface {
+	Demo() int
+}
+
+type S struct {
+	a int
+}
+
+func (s *S) Demo() int {
+	s.a++
+	return s.a
+}
+func TestInterface(t *testing.T) {
+	s := S{}
+	var i If
+	i = &s
+	i.Demo()
+	assert.Equal(t, s.a, 1)
+}
+
+func TestInterfaceEqual(t *testing.T) {
+	var i1, i2 If
+	s := S{a: 2}
+	assert.Equal(t, i1, i2)
+	i1 = &s
+	i2 = &s
+	assert.Equal(t, i1, i2)
+	var s2 *S
+	i1 = s2
+	i2 = nil
+	t.Logf("s2:%v,i1 value:%v,i2 value:%v,i1 type:%T,i2 type:%T",
+		s2, i1, i2, i1, i2)
+	assert.NotEqual(t, i1, i2)
+}