[#193] pkg/container: Increase test coverage

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/container/attribute_test.go

@@ -0,0 +1,84 @@
+package container_test
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/pkg/container"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAttribute(t *testing.T) {
+	const (
+		key   = "key"
+		value = "value"
+	)
+
+	attr := container.NewAttribute()
+	attr.SetKey(key)
+	attr.SetValue(value)
+
+	require.Equal(t, key, attr.Key())
+	require.Equal(t, value, attr.Value())
+
+	t.Run("test v2", func(t *testing.T) {
+		const (
+			newKey   = "newKey"
+			newValue = "newValue"
+		)
+
+		v2 := attr.ToV2()
+		require.Equal(t, key, v2.GetKey())
+		require.Equal(t, value, v2.GetValue())
+
+		v2.SetKey(newKey)
+		v2.SetValue(newValue)
+
+		newAttr := container.NewAttributeFromV2(v2)
+
+		require.Equal(t, newKey, newAttr.Key())
+		require.Equal(t, newValue, newAttr.Value())
+	})
+}
+
+func TestAttributes(t *testing.T) {
+	var (
+		keys = []string{"key1", "key2", "key3"}
+		vals = []string{"val1", "val2", "val3"}
+	)
+
+	attrs := make(container.Attributes, 0, len(keys))
+
+	for i := range keys {
+		attr := container.NewAttribute()
+		attr.SetKey(keys[i])
+		attr.SetValue(vals[i])
+
+		attrs = append(attrs, attr)
+	}
+
+	t.Run("test v2", func(t *testing.T) {
+		const postfix = "x"
+
+		v2 := attrs.ToV2()
+		require.Len(t, v2, len(keys))
+
+		for i := range v2 {
+			k := v2[i].GetKey()
+			v := v2[i].GetValue()
+
+			require.Equal(t, keys[i], k)
+			require.Equal(t, vals[i], v)
+
+			v2[i].SetKey(k + postfix)
+			v2[i].SetValue(v + postfix)
+		}
+
+		newAttrs := container.NewAttributesFromV2(v2)
+		require.Len(t, newAttrs, len(keys))
+
+		for i := range newAttrs {
+			require.Equal(t, keys[i]+postfix, newAttrs[i].Key())
+			require.Equal(t, vals[i]+postfix, newAttrs[i].Value())
+		}
+	})
+}