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constructsql_test.go
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package constructsql_test
import (
"database/sql"
"errors"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/networkteam/construct/v2"
"github.com/networkteam/construct/v2/constructsql"
)
type user struct {
ID int
Name string
}
type mockRow struct {
scanJSON []byte
scanErr error
}
func (r *mockRow) Scan(dest ...any) error {
if r.scanErr != nil {
return r.scanErr
}
if len(dest) != 1 {
return errors.New("mockRow.Scan: dest must have length 1")
}
if r.scanJSON == nil {
return errors.New("mockRow.Scan: scanJSON is nil")
}
*dest[0].(*[]byte) = r.scanJSON
return nil
}
type mockRows struct {
rows []mockRow
closeErr error
iterateErr error
cursor int
closed bool
}
func (m *mockRows) Scan(dest ...any) error {
if m.cursor == 0 {
return errors.New("mockRows.Scan: before first row, must call Next first")
}
if m.cursor > len(m.rows) {
return errors.New("mockRows.Scan: after last row")
}
return m.rows[m.cursor-1].Scan(dest...)
}
func (m *mockRows) Next() bool {
m.cursor++
return m.cursor <= len(m.rows)
}
func (m *mockRows) Close() error {
m.closed = true
return m.closeErr
}
func (m *mockRows) Err() error {
return m.iterateErr
}
var _ constructsql.Rows = &mockRows{}
func TestCollectRows(t *testing.T) {
t.Run("collect rows without error", func(t *testing.T) {
rows := mockRows{
rows: []mockRow{
{
scanJSON: []byte(`{"id": 1, "name": "test"}`),
},
},
}
records, err := constructsql.CollectRows[user](&rows, nil)
require.NoError(t, err)
assert.Equal(t, []user{{ID: 1, Name: "test"}}, records)
assert.True(t, rows.closed)
})
t.Run("collect empty rows without error", func(t *testing.T) {
rows := mockRows{
rows: []mockRow{},
}
records, err := constructsql.CollectRows[user](&rows, nil)
require.NoError(t, err)
assert.Len(t, records, 0)
assert.True(t, rows.closed)
})
t.Run("collect rows with initial error", func(t *testing.T) {
rows := mockRows{}
initialErr := errors.New("some initial error")
records, err := constructsql.CollectRows[user](&rows, initialErr)
require.ErrorIs(t, err, initialErr)
assert.False(t, rows.closed)
assert.Empty(t, records)
})
t.Run("collect rows with scan error", func(t *testing.T) {
scanErr := errors.New("some scan error")
rows := mockRows{
rows: []mockRow{
{
scanJSON: []byte(`{"id": 1, "name": "test"}`),
},
{
scanErr: scanErr,
},
},
}
records, err := constructsql.CollectRows[user](&rows, nil)
require.ErrorIs(t, err, scanErr)
assert.Empty(t, records)
assert.True(t, rows.closed)
})
t.Run("collect rows with iterate error", func(t *testing.T) {
iterateErr := errors.New("some iterate error")
rows := mockRows{
rows: []mockRow{
{
scanJSON: []byte(`{"id": 1, "name": "test"}`),
},
},
iterateErr: iterateErr,
}
records, err := constructsql.CollectRows[user](&rows, nil)
require.ErrorIs(t, err, iterateErr)
assert.Empty(t, records)
assert.True(t, rows.closed)
})
t.Run("collect rows with close error", func(t *testing.T) {
closeErr := errors.New("some error on close")
rows := mockRows{
rows: []mockRow{
{
scanJSON: []byte(`{"id": 1, "name": "test"}`),
},
},
closeErr: closeErr,
}
_, err := constructsql.CollectRows[user](&rows, nil)
require.ErrorIs(t, err, closeErr)
assert.True(t, rows.closed)
})
t.Run("collect rows with scan and close error", func(t *testing.T) {
scanErr := errors.New("some scan error")
closeErr := errors.New("some error on close")
rows := mockRows{
rows: []mockRow{
{
scanJSON: []byte(`{"id": 1, "name": "test"}`),
},
{
scanErr: scanErr,
},
},
closeErr: closeErr,
}
_, err := constructsql.CollectRows[user](&rows, nil)
require.ErrorIs(t, err, scanErr)
require.ErrorIs(t, err, closeErr)
assert.True(t, rows.closed)
})
}
func TestScanRow(t *testing.T) {
t.Run("scans row without error", func(t *testing.T) {
row := mockRow{
scanJSON: []byte(`{"id": 1, "name": "test"}`),
}
record, err := constructsql.ScanRow[user](&row, nil)
require.NoError(t, err)
assert.Equal(t, user{ID: 1, Name: "test"}, record)
})
t.Run("returns QueryRow error", func(t *testing.T) {
row := mockRow{}
queryRowErr := errors.New("some query error")
_, err := constructsql.ScanRow[user](&row, queryRowErr)
require.ErrorIs(t, err, queryRowErr)
})
t.Run("returns Scan error", func(t *testing.T) {
scanErr := errors.New("some scan error")
row := mockRow{
scanErr: scanErr,
}
_, err := constructsql.ScanRow[user](&row, nil)
require.ErrorIs(t, err, scanErr)
})
t.Run("converts Scan err to ErrNotFound", func(t *testing.T) {
scanErr := sql.ErrNoRows
row := mockRow{
scanErr: scanErr,
}
_, err := constructsql.ScanRow[user](&row, nil)
require.ErrorIs(t, err, construct.ErrNotFound)
})
t.Run("converts QueryRow err to ErrNotFound", func(t *testing.T) {
// Note: the underlying error usually only occurs during Scan, but we want to make sure it works here as well.
queryRowErr := sql.ErrNoRows
row := mockRow{}
_, err := constructsql.ScanRow[user](&row, queryRowErr)
require.ErrorIs(t, err, construct.ErrNotFound)
})
}
type sqlResult struct {
affectedRows int64
affectedRowsErr error
}
func (r sqlResult) LastInsertId() (int64, error) {
panic("implement me")
}
func (r sqlResult) RowsAffected() (int64, error) {
return r.affectedRows, r.affectedRowsErr
}
func TestAssertRowsAffected(t *testing.T) {
t.Run("returns nil if rows affected matches expected", func(t *testing.T) {
err := constructsql.AssertRowsAffected("update", 2)(sqlResult{affectedRows: 2}, nil)
require.NoError(t, err)
})
t.Run("returns error if rows affected does not match expected", func(t *testing.T) {
err := constructsql.AssertRowsAffected("update", 1)(sqlResult{affectedRows: 2}, nil)
require.Error(t, err)
})
t.Run("returns error if rows affected returns error", func(t *testing.T) {
err := constructsql.AssertRowsAffected("update", 1)(sqlResult{affectedRowsErr: errors.New("some error")}, nil)
require.Error(t, err)
})
t.Run("returns previous error", func(t *testing.T) {
err := constructsql.AssertRowsAffected("update", 1)(sqlResult{}, errors.New("some error"))
require.Error(t, err)
})
}