virtcontainers: Add unit test for utils/compare.go

Add unit test for virtcontainers/utils/compare.go to increase overall
coverage.

Fixes kata-containers#2928

Signed-off-by: Chelsea Mafrica <[email protected]>

virtcontainers/utils/compare_test.go

@@ -0,0 +1,111 @@
+// Copyright (c) 2020 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package utils
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type ExampleStruct struct {
+	X int
+	Y string
+}
+
+func TestCompareStruct(t *testing.T) {
+	assert := assert.New(t)
+
+	var testStruct1, testStruct2 ExampleStruct
+
+	testStruct1 = ExampleStruct{1, "test"}
+	testStruct2 = ExampleStruct{1, "test"}
+	result := DeepCompare(testStruct1, testStruct2)
+	assert.True(result)
+
+	testStruct2 = ExampleStruct{2, "test"}
+	result = DeepCompare(testStruct1, testStruct2)
+	assert.False(result)
+}
+
+func TestCompareArray(t *testing.T) {
+	assert := assert.New(t)
+
+	a1 := [2]string{"test", "array"}
+	a2 := [2]string{"test", "array"}
+	result := DeepCompare(a1, a2)
+	assert.True(result)
+
+	a2 = [2]string{"test", "compare"}
+	result = DeepCompare(a1, a2)
+	assert.False(result)
+
+	a3 := [3]string{"test", "array", "compare"}
+	result = DeepCompare(a1, a3)
+	assert.False(result)
+}
+
+func TestCompareSlice(t *testing.T) {
+	assert := assert.New(t)
+
+	s1 := []int{1, 2, 3}
+	s2 := []int{1, 2, 3}
+	result := DeepCompare(s1, s2)
+	assert.True(result)
+
+	s2 = []int{1, 2, 4}
+	result = DeepCompare(s1, s2)
+	assert.False(result)
+
+	s2 = []int{1, 2, 3, 4}
+	result = DeepCompare(s1, s2)
+	assert.False(result)
+}
+
+func TestCompareMap(t *testing.T) {
+	assert := assert.New(t)
+
+	m1 := make(map[string]int)
+	m1["a"] = 1
+	m2 := make(map[string]int)
+	m2["a"] = 1
+	result := DeepCompare(m1, m2)
+	assert.True(result)
+
+	m1["b"] = 2
+	result = DeepCompare(m1, m2)
+	assert.False(result)
+
+	m2["b"] = 3
+	result = DeepCompare(m1, m2)
+	assert.False(result)
+}
+
+func TestCompareInterface(t *testing.T) {
+	assert := assert.New(t)
+
+	var r1, r2 io.Reader
+	r1 = os.Stdin
+	r2 = os.Stdin
+	result := DeepCompare(r1, r2)
+	assert.True(result)
+
+	r2 = new(bytes.Buffer)
+	result = DeepCompare(r1, r2)
+	assert.False(result)
+}
+
+func TestDeepCompareValueFailure(t *testing.T) {
+	assert := assert.New(t)
+
+	a := [2]string{"test", "array"}
+	s := []string{"test", "array"}
+	result := DeepCompare(a, s)
+	assert.False(result)
+}