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// Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package sqlite3
import (
"database/sql"
"fmt"
"os"
"testing"
"github.com/stretchr/testify/assert"
)
type testModule struct {
t *testing.T
intarray []int
}
type testVTab struct {
intarray []int
}
type testVTabCursor struct {
vTab *testVTab
index int
}
func (m testModule) Create(c *SQLiteConn, args []string) (VTab, error) {
assert.True(m.t, len(args) == 6, "six arguments expected")
assert.Equal(m.t, "test", args[0], "module name")
assert.Equal(m.t, "main", args[1], "db name")
assert.Equal(m.t, "vtab", args[2], "table name")
assert.Equal(m.t, "'1'", args[3], "first arg")
assert.Equal(m.t, "2", args[4], "second arg")
assert.Equal(m.t, "three", args[5], "third arg")
err := c.DeclareVTab("CREATE TABLE x(test TEXT)")
if err != nil {
return nil, err
}
return &testVTab{m.intarray}, nil
}
func (m testModule) Connect(c *SQLiteConn, args []string) (VTab, error) {
return m.Create(c, args)
}
func (m testModule) DestroyModule() {}
func (v *testVTab) BestIndex(cst []InfoConstraint, ob []InfoOrderBy) (*IndexResult, error) {
used := make([]bool, 0, len(cst))
for range cst {
used = append(used, false)
}
return &IndexResult{
Used: used,
IdxNum: 0,
IdxStr: "test-index",
AlreadyOrdered: true,
EstimatedCost: 100,
EstimatedRows: 200,
}, nil
}
func (v *testVTab) Disconnect() error {
return nil
}
func (v *testVTab) Destroy() error {
return nil
}
func (v *testVTab) Open() (VTabCursor, error) {
return &testVTabCursor{v, 0}, nil
}
func (vc *testVTabCursor) Close() error {
return nil
}
func (vc *testVTabCursor) Filter(idxNum int, idxStr string, vals []interface{}) error {
vc.index = 0
return nil
}
func (vc *testVTabCursor) Next() error {
vc.index++
return nil
}
func (vc *testVTabCursor) EOF() bool {
return vc.index >= len(vc.vTab.intarray)
}
func (vc *testVTabCursor) Column(c *SQLiteContext, col int) error {
if col != 0 {
return fmt.Errorf("column index out of bounds: %d", col)
}
c.ResultInt(vc.vTab.intarray[vc.index])
return nil
}
func (vc *testVTabCursor) Rowid() (int64, error) {
return int64(vc.index), nil
}
func TestCreateModule(t *testing.T) {
tempFilename := TempFilename(t)
defer os.Remove(tempFilename)
intarray := []int{1, 2, 3}
sql.Register("sqlite3_TestCreateModule", &SQLiteDriver{
ConnectHook: func(conn *SQLiteConn) error {
return conn.CreateModule("test", testModule{t, intarray})
},
})
db, err := sql.Open("sqlite3_TestCreateModule", tempFilename)
assert.Nil(t, err, "could not open db")
_, err = db.Exec("CREATE VIRTUAL TABLE vtab USING test('1', 2, three)")
assert.Nil(t, err, "could not create vtable")
var i, value int
rows, err := db.Query("SELECT rowid, * FROM vtab WHERE test = '3'")
assert.Nil(t, err, "couldn't select from virtual table")
for rows.Next() {
rows.Scan(&i, &value)
assert.Equal(t, intarray[i], value)
}
_, err = db.Exec("DROP TABLE vtab")
assert.Nil(t, err, "couldn't drop virtual table")
}
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