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// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package cat
import (
"encoding/json"
"testing"
)
func TestTxnDataRoundTrip(t *testing.T) {
for _, test := range []struct {
input string
output string
txnData TxnDataHeader
}{
{
input: `["guid",false]`,
output: `["guid",false,"",""]`,
txnData: TxnDataHeader{
GUID: "guid",
TripID: "",
PathHash: "",
},
},
{
input: `["guid",false,"trip"]`,
output: `["guid",false,"trip",""]`,
txnData: TxnDataHeader{
GUID: "guid",
TripID: "trip",
PathHash: "",
},
},
{
input: `["guid",false,null]`,
output: `["guid",false,"",""]`,
txnData: TxnDataHeader{
GUID: "guid",
TripID: "",
PathHash: "",
},
},
{
input: `["guid",false,"trip",null]`,
output: `["guid",false,"trip",""]`,
txnData: TxnDataHeader{
GUID: "guid",
TripID: "trip",
PathHash: "",
},
},
{
input: `["guid",false,"trip","hash"]`,
output: `["guid",false,"trip","hash"]`,
txnData: TxnDataHeader{
GUID: "guid",
TripID: "trip",
PathHash: "hash",
},
},
} {
// Test unmarshalling.
txnData := &TxnDataHeader{}
if err := json.Unmarshal([]byte(test.input), txnData); err != nil {
t.Errorf("given %s: error expected to be nil; got %v", test.input, err)
}
if test.txnData.GUID != txnData.GUID {
t.Errorf("given %s: GUID expected to be %s; got %s", test.input, test.txnData.GUID, txnData.GUID)
}
if test.txnData.TripID != txnData.TripID {
t.Errorf("given %s: TripID expected to be %s; got %s", test.input, test.txnData.TripID, txnData.TripID)
}
if test.txnData.PathHash != txnData.PathHash {
t.Errorf("given %s: PathHash expected to be %s; got %s", test.input, test.txnData.PathHash, txnData.PathHash)
}
// Test marshalling.
data, err := json.Marshal(&test.txnData)
if err != nil {
t.Errorf("given %s: error expected to be nil; got %v", test.output, err)
}
if string(data) != test.output {
t.Errorf("given %s: unexpected JSON %s", test.output, string(data))
}
}
}
func TestTxnDataUnmarshal(t *testing.T) {
// Test error cases where we get a generic error from the JSON package.
for _, input := range []string{
// Basic malformed JSON test: beyond this, we're not going to unit test the
// Go standard library's JSON package.
``,
} {
txnData := &TxnDataHeader{}
if err := json.Unmarshal([]byte(input), txnData); err == nil {
t.Errorf("given %s: error expected to be non-nil; got nil", input)
}
}
// Test error cases where the incorrect number of elements was provided.
for _, input := range []string{
`[]`,
`[1]`,
} {
txnData := &TxnDataHeader{}
err := json.Unmarshal([]byte(input), txnData)
if _, ok := err.(errUnexpectedArraySize); !ok {
t.Errorf("given %s: error expected to be errUnexpectedArraySize; got %v", input, err)
}
}
// Test error cases where a specific variable is returned.
for _, tc := range []struct {
input string
err error
}{
// Unexpected JSON types.
{`false`, errInvalidTxnDataJSON},
{`true`, errInvalidTxnDataJSON},
{`1234`, errInvalidTxnDataJSON},
{`{}`, errInvalidTxnDataJSON},
{`""`, errInvalidTxnDataJSON},
// Invalid data types for each field in turn.
{`[false,false,"trip","hash"]`, errInvalidTxnDataGUID},
{`["guid",false,0,"hash"]`, errInvalidTxnDataTripID},
{`["guid",false,"trip",[]]`, errInvalidTxnDataPathHash},
} {
txnData := &TxnDataHeader{}
if err := json.Unmarshal([]byte(tc.input), txnData); err != tc.err {
t.Errorf("given %s: error expected to be %v; got %v", tc.input, tc.err, err)
}
}
}
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