122 lines
4.1 KiB
Go
122 lines
4.1 KiB
Go
package test
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import (
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"database/sql"
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"fmt"
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"io"
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"testing"
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)
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var (
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_ CleanUpDB = &sql.DB{}
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)
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// CleanUpDB is an interface with only what is needed to delete all
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// rows in all tables in a database plus close the database
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// connection. It is satisfied by *sql.DB.
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type CleanUpDB interface {
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Begin() (*sql.Tx, error)
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Exec(query string, args ...interface{}) (sql.Result, error)
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Query(query string, args ...interface{}) (*sql.Rows, error)
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io.Closer
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}
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// ResetSATestDatabase deletes all rows in all tables in the SA DB.
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// If fails the tests if that errors and returns a clean up function
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// that will delete all rows again and close the database.
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// "Tables available" means all tables that can be seen in the MariaDB
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// configuration by the database user except for ones that are
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// configuration only like goose_db_version (for migrations) or
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// the ones describing the internal configuration of the server. To be
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// used only in test code.
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func ResetSATestDatabase(t testing.TB) func() {
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return resetTestDatabase(t, "sa")
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}
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func resetTestDatabase(t testing.TB, dbType string) func() {
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db, err := sql.Open("mysql", fmt.Sprintf("test_setup@tcp(boulder-mysql:3306)/boulder_%s_test", dbType))
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if err != nil {
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t.Fatalf("Couldn't create db: %s", err)
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}
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if err := deleteEverythingInAllTables(db); err != nil {
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t.Fatalf("Failed to delete everything: %s", err)
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}
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return func() {
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if err := deleteEverythingInAllTables(db); err != nil {
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t.Fatalf("Failed to truncate tables after the test: %s", err)
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}
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_ = db.Close()
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}
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}
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// clearEverythingInAllTables deletes all rows in the tables
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// available to the CleanUpDB passed in and resets the autoincrement
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// counters. See allTableNamesInDB for what is meant by "all tables
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// available". To be used only in test code.
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func deleteEverythingInAllTables(db CleanUpDB) error {
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ts, err := allTableNamesInDB(db)
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if err != nil {
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return err
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}
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for _, tn := range ts {
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// We do this in a transaction to make sure that the foreign
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// key checks remain disabled even if the db object chooses
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// another connection to make the deletion on. Note that
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// `alter table` statements will silently cause transactions
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// to commit, so we do them outside of the transaction.
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tx, err := db.Begin()
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if err != nil {
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return fmt.Errorf("unable to start transaction to delete all rows from table %#v: %s", tn, err)
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}
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_, err = tx.Exec("set FOREIGN_KEY_CHECKS = 0")
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if err != nil {
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return fmt.Errorf("unable to disable FOREIGN_KEY_CHECKS to delete all rows from table %#v: %s", tn, err)
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}
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// 1 = 1 here prevents the MariaDB i_am_a_dummy setting from
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// rejecting the DELETE for not having a WHERE clause.
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_, err = tx.Exec("delete from `" + tn + "` where 1 = 1")
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if err != nil {
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return fmt.Errorf("unable to delete all rows from table %#v: %s", tn, err)
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}
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_, err = tx.Exec("set FOREIGN_KEY_CHECKS = 1")
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if err != nil {
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return fmt.Errorf("unable to re-enable FOREIGN_KEY_CHECKS to delete all rows from table %#v: %s", tn, err)
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}
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err = tx.Commit()
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if err != nil {
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return fmt.Errorf("unable to commit transaction to delete all rows from table %#v: %s", tn, err)
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}
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_, err = db.Exec("alter table `" + tn + "` AUTO_INCREMENT = 1")
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if err != nil {
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return fmt.Errorf("unable to reset autoincrement on table %#v: %s", tn, err)
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}
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}
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return err
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}
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// allTableNamesInDB returns the names of the tables available to the
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// CleanUpDB passed in. "Tables available" means all tables that can
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// be seen in the MariaDB configuration by the database user except
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// for ones that are configuration only like goose_db_version (for
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// migrations) or the ones describing the internal configuration of
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// the server. To be used only in test code.
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func allTableNamesInDB(db CleanUpDB) ([]string, error) {
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r, err := db.Query("select table_name from information_schema.tables t where t.table_schema = DATABASE() and t.table_name != 'goose_db_version';")
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if err != nil {
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return nil, err
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}
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var ts []string
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for r.Next() {
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tableName := ""
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err = r.Scan(&tableName)
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if err != nil {
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return nil, err
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}
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ts = append(ts, tableName)
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}
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return ts, r.Err()
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}
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