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udt.go
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udt.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 testutils
import (
"testing"
"unsafe"
"github.com/gocql/gocql"
"github.com/stretchr/testify/assert"
)
// UDTField describes a field in a gocql User Defined Type
type UDTField struct {
Name string
Type gocql.Type
ValIn []byte // value to attempt to marshal
Err bool // is error expected?
}
// UDTTestCase desribes a test for a UDT
type UDTTestCase struct {
Obj gocql.UDTMarshaler
ObjName string
New func() gocql.UDTUnmarshaler
Fields []UDTField
}
// Run runs a test case
func (testCase UDTTestCase) Run(t *testing.T) {
for _, ff := range testCase.Fields {
field := ff // capture loop var
t.Run(testCase.ObjName+"-"+field.Name, func(t *testing.T) {
// To test MarshalUDT we need a gocql.NativeType struct whose fields private.
// Instead we create a structural copy that we cast to gocql.NativeType using unsafe.Pointer
nt := struct {
proto byte
typ gocql.Type
custom string
}{
proto: 0x03,
typ: field.Type,
}
typeInfo := *(*gocql.NativeType)(unsafe.Pointer(&nt)) /* nolint #nosec */
data, err := testCase.Obj.MarshalUDT(field.Name, typeInfo)
if field.Err {
assert.Error(t, err)
} else {
assert.NoError(t, err)
assert.Equal(t, field.ValIn, data)
}
obj := testCase.New()
err = obj.UnmarshalUDT(field.Name, typeInfo, field.ValIn)
if field.Err {
assert.Error(t, err)
} else {
assert.NoError(t, err)
}
})
}
}