A simple, federated blogging platform. Written in Go. Fork by @gytisrepecka to provide suggestions and fixes to upstream @writeas.
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package writefreely
import (
"context"
"database/sql"
"encoding/gob"
"errors"
"fmt"
uuid "github.com/nu7hatch/gouuid"
"github.com/stretchr/testify/assert"
"math/rand"
"os"
"strings"
"testing"
"time"
)
var testDB *sql.DB
type ScopedTestBody func(*sql.DB)
// TestMain provides testing infrastructure within this package.
func TestMain(m *testing.M) {
rand.Seed(time.Now().UTC().UnixNano())
gob.Register(&User{})
if runMySQLTests() {
var err error
testDB, err = initMySQL(os.Getenv("WF_USER"), os.Getenv("WF_PASSWORD"), os.Getenv("WF_DB"), os.Getenv("WF_HOST"))
if err != nil {
fmt.Println(err)
return
}
}
code := m.Run()
if runMySQLTests() {
if closeErr := testDB.Close(); closeErr != nil {
fmt.Println(closeErr)
}
}
os.Exit(code)
}
func runMySQLTests() bool {
return len(os.Getenv("TEST_MYSQL")) > 0
}
func initMySQL(dbUser, dbPassword, dbName, dbHost string) (*sql.DB, error) {
if dbUser == "" || dbPassword == "" {
return nil, errors.New("database user or password not set")
}
if dbHost == "" {
dbHost = "localhost"
}
if dbName == "" {
dbName = "writefreely"
}
dsn := fmt.Sprintf("%s:%s@tcp(%s:3306)/%s?charset=utf8mb4&parseTime=true", dbUser, dbPassword, dbHost, dbName)
db, err := sql.Open("mysql", dsn)
if err != nil {
return nil, err
}
if err := ensureMySQL(db); err != nil {
return nil, err
}
return db, nil
}
func ensureMySQL(db *sql.DB) error {
if err := db.Ping(); err != nil {
return err
}
db.SetMaxOpenConns(250)
return nil
}
// withTestDB provides a scoped database connection.
func withTestDB(t *testing.T, testBody ScopedTestBody) {
db, cleanup, err := newTestDatabase(testDB,
os.Getenv("WF_USER"),
os.Getenv("WF_PASSWORD"),
os.Getenv("WF_DB"),
os.Getenv("WF_HOST"),
)
assert.NoError(t, err)
defer func() {
assert.NoError(t, cleanup())
}()
testBody(db)
}
// newTestDatabase creates a new temporary test database. When a test
// database connection is returned, it will have created a new database and
// initialized it with tables from a reference database.
func newTestDatabase(base *sql.DB, dbUser, dbPassword, dbName, dbHost string) (*sql.DB, func() error, error) {
var err error
var baseName = dbName
if baseName == "" {
row := base.QueryRow("SELECT DATABASE()")
err := row.Scan(&baseName)
if err != nil {
return nil, nil, err
}
}
tUUID, _ := uuid.NewV4()
suffix := strings.Replace(tUUID.String(), "-", "_", -1)
newDBName := baseName + suffix
_, err = base.Exec("CREATE DATABASE " + newDBName)
if err != nil {
return nil, nil, err
}
newDB, err := initMySQL(dbUser, dbPassword, newDBName, dbHost)
if err != nil {
return nil, nil, err
}
rows, err := base.Query("SHOW TABLES IN " + baseName)
if err != nil {
return nil, nil, err
}
for rows.Next() {
var tableName string
if err := rows.Scan(&tableName); err != nil {
return nil, nil, err
}
query := fmt.Sprintf("CREATE TABLE %s LIKE %s.%s", tableName, baseName, tableName)
if _, err := newDB.Exec(query); err != nil {
return nil, nil, err
}
}
cleanup := func() error {
if closeErr := newDB.Close(); closeErr != nil {
fmt.Println(closeErr)
}
_, err = base.Exec("DROP DATABASE " + newDBName)
return err
}
return newDB, cleanup, nil
}
func countRows(t *testing.T, ctx context.Context, db *sql.DB, count int, query string, args ...interface{}) {
var returned int
err := db.QueryRowContext(ctx, query, args...).Scan(&returned)
assert.NoError(t, err, "error executing query %s and args %s", query, args)
assert.Equal(t, count, returned, "unexpected return count %d, expected %d from %s and args %s", returned, count, query, args)
}