73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
// Copyright (C) 2016 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
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//
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// Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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// +build trace
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package sqlite3
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import (
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"database/sql"
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"testing"
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)
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type sumAggregator int64
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func (s *sumAggregator) Step(x int64) {
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*s += sumAggregator(x)
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}
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func (s *sumAggregator) Done() int64 {
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return int64(*s)
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}
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func TestAggregatorRegistration(t *testing.T) {
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customSum := func() *sumAggregator {
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var ret sumAggregator
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return &ret
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}
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sql.Register("sqlite3_AggregatorRegistration", &SQLiteDriver{
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ConnectHook: func(conn *SQLiteConn) error {
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if err := conn.RegisterAggregator("customSum", customSum, true); err != nil {
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return err
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}
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return nil
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},
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})
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db, err := sql.Open("sqlite3_AggregatorRegistration", ":memory:")
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if err != nil {
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t.Fatal("Failed to open database:", err)
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}
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defer db.Close()
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_, err = db.Exec("create table foo (department integer, profits integer)")
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if err != nil {
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// trace feature is not implemented
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t.Skip("Failed to create table:", err)
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}
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_, err = db.Exec("insert into foo values (1, 10), (1, 20), (2, 42)")
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if err != nil {
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t.Fatal("Failed to insert records:", err)
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}
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tests := []struct {
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dept, sum int64
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}{
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{1, 30},
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{2, 42},
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}
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for _, test := range tests {
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var ret int64
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err = db.QueryRow("select customSum(profits) from foo where department = $1 group by department", test.dept).Scan(&ret)
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if err != nil {
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t.Fatal("Query failed:", err)
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}
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if ret != test.sum {
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t.Fatalf("Custom sum returned wrong value, got %d, want %d", ret, test.sum)
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}
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}
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}
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