forked from pingcap/dumpling
/
test_util.go
146 lines (121 loc) · 2.8 KB
/
test_util.go
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package export
import (
"database/sql"
"database/sql/driver"
"fmt"
"github.com/DATA-DOG/go-sqlmock"
)
type mockStringWriter struct {
buf string
}
func (m *mockStringWriter) WriteString(s string) (int, error) {
if s == "poison" {
return 0, fmt.Errorf("poison_error")
}
m.buf = s
return len(s), nil
}
type mockStringCollector struct {
buf string
}
func (m *mockStringCollector) WriteString(s string) (int, error) {
m.buf += s
return len(s), nil
}
type mockSQLRowIterator struct {
idx int
data [][]sql.NullString
}
func (m *mockSQLRowIterator) Next(sp RowReceiver) error {
args := make([]interface{}, len(m.data[m.idx]))
sp.BindAddress(args)
for i := range args {
*(args[i]).(*sql.NullString) = m.data[m.idx][i]
}
m.idx += 1
return nil
}
func (m *mockSQLRowIterator) HasNext() bool {
return m.idx < len(m.data)
}
type mockMetaIR struct {
tarName string
meta string
specCmt []string
}
func (m *mockMetaIR) SpecialComments() StringIter {
return newStringIter(m.specCmt...)
}
func (m *mockMetaIR) TargetName() string {
return m.tarName
}
func (m *mockMetaIR) MetaSQL() string {
return m.meta
}
func newMockMetaIR(targetName string, meta string, specialComments []string) MetaIR {
return &mockMetaIR{
tarName: targetName,
meta: meta,
specCmt: specialComments,
}
}
type mockTableIR struct {
dbName string
tblName string
chunIndex int
data [][]driver.Value
selectedField string
specCmt []string
colTypes []string
}
func (m *mockTableIR) DatabaseName() string {
return m.dbName
}
func (m *mockTableIR) TableName() string {
return m.tblName
}
func (m *mockTableIR) ChunkIndex() int {
return m.chunIndex
}
func (m *mockTableIR) ColumnCount() uint {
return uint(len(m.colTypes))
}
func (m *mockTableIR) ColumnTypes() []string {
return m.colTypes
}
func (m *mockTableIR) SelectedField() string {
if m.selectedField == "*" {
return ""
}
return m.selectedField
}
func (m *mockTableIR) SpecialComments() StringIter {
return newStringIter(m.specCmt...)
}
func (m *mockTableIR) Rows() SQLRowIter {
mockRows := sqlmock.NewRows(m.colTypes)
for _, datum := range m.data {
mockRows.AddRow(datum...)
}
db, mock, err := sqlmock.New()
if err != nil {
panic(fmt.Sprintf("sqlmock.New return error: %v", err))
}
defer db.Close()
mock.ExpectQuery("select 1").WillReturnRows(mockRows)
rows, err := db.Query("select 1")
if err != nil {
panic(fmt.Sprintf("sqlmock.New return error: %v", err))
}
return newRowIter(rows, len(m.colTypes))
}
func newMockTableIR(databaseName, tableName string, data [][]driver.Value, specialComments, colTypes []string) TableDataIR {
return &mockTableIR{
dbName: databaseName,
tblName: tableName,
data: data,
specCmt: specialComments,
selectedField: "*",
colTypes: colTypes,
}
}