Bulk move from k8s.io/kubectl

vendor/github.com/modern-go/reflect2/tests/slice_ptr_test.go

@@ -0,0 +1,58 @@
+package tests
+
+import (
+	"testing"
+	"github.com/modern-go/reflect2"
+	"github.com/modern-go/test"
+
+	"unsafe"
+	"github.com/modern-go/test/must"
+	"context"
+)
+
+func Test_slice_ptr(t *testing.T) {
+	var pInt = func(val int) *int {
+		return &val
+	}
+	t.Run("MakeSlice", testOp(func(api reflect2.API) interface{} {
+		valType := api.TypeOf([]*int{}).(reflect2.SliceType)
+		obj := valType.MakeSlice(5, 10)
+		obj.([]*int)[0] = pInt(1)
+		obj.([]*int)[4] = pInt(5)
+		return obj
+	}))
+	t.Run("SetIndex", testOp(func(api reflect2.API) interface{} {
+		obj := []*int{pInt(1), nil}
+		valType := api.TypeOf(obj).(reflect2.SliceType)
+		valType.SetIndex(obj, 0, pInt(2))
+		valType.SetIndex(obj, 1, pInt(3))
+		return obj
+	}))
+	t.Run("UnsafeSetIndex", test.Case(func(ctx context.Context) {
+		obj := []*int{pInt(1), nil}
+		valType := reflect2.TypeOf(obj).(reflect2.SliceType)
+		valType.UnsafeSetIndex(reflect2.PtrOf(obj), 0, unsafe.Pointer(pInt(2)))
+		valType.UnsafeSetIndex(reflect2.PtrOf(obj), 1, unsafe.Pointer(pInt(1)))
+		must.Equal([]*int{pInt(2), pInt(1)}, obj)
+	}))
+	t.Run("GetIndex", testOp(func(api reflect2.API) interface{} {
+		obj := []*int{pInt(1), nil}
+		valType := api.TypeOf(obj).(reflect2.SliceType)
+		return []interface{}{
+			valType.GetIndex(&obj, 0),
+			valType.GetIndex(&obj, 1),
+			valType.GetIndex(obj, 0),
+			valType.GetIndex(obj, 1),
+		}
+	}))
+	t.Run("Append", testOp(func(api reflect2.API) interface{} {
+		obj := make([]*int, 2, 3)
+		obj[0] = pInt(1)
+		obj[1] = pInt(2)
+		valType := api.TypeOf(obj).(reflect2.SliceType)
+		valType.Append(obj, pInt(3))
+		// will trigger grow
+		valType.Append(obj, pInt(4))
+		return obj
+	}))
+}