Refactor pkg packages

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

pkg/cri/util/deep_copy_test.go

@@ -0,0 +1,63 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package util
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type A struct {
+	String  string
+	Int     int
+	Strings []string
+	Ints    map[string]int
+	As      map[string]*A
+}
+
+func TestCopy(t *testing.T) {
+	src := &A{
+		String:  "Hello World",
+		Int:     5,
+		Strings: []string{"A", "B"},
+		Ints:    map[string]int{"A": 1, "B": 2, "C": 4},
+		As: map[string]*A{
+			"One": {String: "2"},
+			"Two": {String: "3"},
+		},
+	}
+	dst := &A{
+		Strings: []string{"C"},
+		Ints:    map[string]int{"B": 3, "C": 4},
+		As:      map[string]*A{"One": {String: "1", Int: 5}},
+	}
+	expected := &A{
+		String:  "Hello World",
+		Int:     5,
+		Strings: []string{"A", "B"},
+		Ints:    map[string]int{"A": 1, "B": 2, "C": 4},
+		As: map[string]*A{
+			"One": {String: "2"},
+			"Two": {String: "3"},
+		},
+	}
+	assert.NotEqual(t, expected, dst)
+	err := DeepCopy(dst, src)
+	assert.NoError(t, err)
+	assert.Equal(t, expected, dst)
+}