77 lines
2.2 KiB
Go
77 lines
2.2 KiB
Go
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package structs
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import (
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"bytes"
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"reflect"
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"testing"
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"github.com/hashicorp/go-msgpack/codec"
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"github.com/stretchr/testify/require"
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)
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// TestingOldPre1dot7MsgpackHandle is the common configuration pre-1.7.0
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var TestingOldPre1dot7MsgpackHandle = &codec.MsgpackHandle{}
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// TestMsgpackEncodeDecode is a test helper to easily write a test to verify
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// msgpack encoding and decoding using two handles is identical.
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func TestMsgpackEncodeDecode(t *testing.T, in interface{}, requireEncoderEquality bool) {
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t.Helper()
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var (
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// This is the common configuration pre-1.7.0
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handle1 = TestingOldPre1dot7MsgpackHandle
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// This is the common configuration post-1.7.0
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handle2 = MsgpackHandle
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)
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// Verify the 3 interface{} args are all pointers to the same kind of type.
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inType := reflect.TypeOf(in)
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require.Equal(t, reflect.Ptr, inType.Kind())
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// Encode using both handles.
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var b1 []byte
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{
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var buf bytes.Buffer
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enc := codec.NewEncoder(&buf, handle1)
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require.NoError(t, enc.Encode(in))
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b1 = buf.Bytes()
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}
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var b2 []byte
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{
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var buf bytes.Buffer
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enc := codec.NewEncoder(&buf, handle2)
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require.NoError(t, enc.Encode(in))
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b2 = buf.Bytes()
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}
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if requireEncoderEquality {
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// The resulting bytes should be identical.
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require.Equal(t, b1, b2)
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}
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// Decode both outputs using both handles.
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t.Run("old encoder and old decoder", func(t *testing.T) {
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out1 := reflect.New(inType.Elem()).Interface()
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dec := codec.NewDecoderBytes(b1, handle1)
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require.NoError(t, dec.Decode(out1))
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require.Equal(t, in, out1)
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})
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t.Run("old encoder and new decoder", func(t *testing.T) {
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out1 := reflect.New(inType.Elem()).Interface()
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dec := codec.NewDecoderBytes(b1, handle2)
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require.NoError(t, dec.Decode(out1))
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require.Equal(t, in, out1)
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})
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t.Run("new encoder and old decoder", func(t *testing.T) {
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out2 := reflect.New(inType.Elem()).Interface()
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dec := codec.NewDecoderBytes(b2, handle1)
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require.NoError(t, dec.Decode(out2))
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require.Equal(t, in, out2)
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})
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t.Run("new encoder and new decoder", func(t *testing.T) {
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out2 := reflect.New(inType.Elem()).Interface()
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dec := codec.NewDecoderBytes(b2, handle2)
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require.NoError(t, dec.Decode(out2))
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require.Equal(t, in, out2)
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})
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}
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