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Add additional tests for postgres driver

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This commit is contained in:
Adrian Macneil 2015-11-28 22:31:55 -07:00
parent c6aba53e51
commit e87dd1e608
5 changed files with 164 additions and 37 deletions
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38
driver/postgres/postgres.go
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@ -4,7 +4,7 @@ import (
"database/sql"
"fmt"
"github.com/adrianmacneil/dbmate/driver/shared"
pq "github.com/lib/pq"
"github.com/lib/pq"
"io"
"net/url"
)
@ -14,17 +14,16 @@ type Driver struct {
}
// Open creates a new database connection
func (postgres Driver) Open(u *url.URL) (*sql.DB, error) {
func (drv Driver) Open(u *url.URL) (*sql.DB, error) {
return sql.Open("postgres", u.String())
}
// postgresExec runs a sql statement on the "postgres" database
func (postgres Driver) openPostgresDB(u *url.URL) (*sql.DB, error) {
func (drv Driver) openPostgresDB(u *url.URL) (*sql.DB, error) {
// connect to postgres database
postgresURL := *u
postgresURL.Path = "postgres"
return postgres.Open(&postgresURL)
return drv.Open(&postgresURL)
}
func mustClose(c io.Closer) {
@ -34,11 +33,11 @@ func mustClose(c io.Closer) {
}
// CreateDatabase creates the specified database
func (postgres Driver) CreateDatabase(u *url.URL) error {
func (drv Driver) CreateDatabase(u *url.URL) error {
name := shared.DatabaseName(u)
fmt.Printf("Creating: %s\n", name)
db, err := postgres.openPostgresDB(u)
db, err := drv.openPostgresDB(u)
if err != nil {
return err
}
@ -51,11 +50,11 @@ func (postgres Driver) CreateDatabase(u *url.URL) error {
}
// DropDatabase drops the specified database (if it exists)
func (postgres Driver) DropDatabase(u *url.URL) error {
func (drv Driver) DropDatabase(u *url.URL) error {
name := shared.DatabaseName(u)
fmt.Printf("Dropping: %s\n", name)
db, err := postgres.openPostgresDB(u)
db, err := drv.openPostgresDB(u)
if err != nil {
return err
}
@ -68,10 +67,10 @@ func (postgres Driver) DropDatabase(u *url.URL) error {
}
// DatabaseExists determines whether the database exists
func (postgres Driver) DatabaseExists(u *url.URL) (bool, error) {
func (drv Driver) DatabaseExists(u *url.URL) (bool, error) {
name := shared.DatabaseName(u)
db, err := postgres.openPostgresDB(u)
db, err := drv.openPostgresDB(u)
if err != nil {
return false, err
}
@ -87,13 +86,8 @@ func (postgres Driver) DatabaseExists(u *url.URL) (bool, error) {
return exists, err
}
// HasMigrationsTable returns true if the schema_migrations table exists
func (postgres Driver) HasMigrationsTable(db *sql.DB) (bool, error) {
return false, fmt.Errorf("not implemented")
}
// CreateMigrationsTable creates the schema_migrations table
func (postgres Driver) CreateMigrationsTable(db *sql.DB) error {
func (drv Driver) CreateMigrationsTable(db *sql.DB) error {
_, err := db.Exec(`CREATE TABLE IF NOT EXISTS schema_migrations (
version varchar(255) PRIMARY KEY)`)
@ -102,7 +96,7 @@ func (postgres Driver) CreateMigrationsTable(db *sql.DB) error {
// SelectMigrations returns a list of applied migrations
// with an optional limit (in descending order)
func (postgres Driver) SelectMigrations(db *sql.DB, limit int) (map[string]struct{}, error) {
func (drv Driver) SelectMigrations(db *sql.DB, limit int) (map[string]bool, error) {
query := "SELECT version FROM schema_migrations ORDER BY version DESC"
if limit >= 0 {
query = fmt.Sprintf("%s LIMIT %d", query, limit)
@ -114,28 +108,28 @@ func (postgres Driver) SelectMigrations(db *sql.DB, limit int) (map[string]struc
defer mustClose(rows)
migrations := map[string]struct{}{}
migrations := map[string]bool{}
for rows.Next() {
var version string
if err := rows.Scan(&version); err != nil {
return nil, err
}
migrations[version] = struct{}{}
migrations[version] = true
}
return migrations, nil
}
// InsertMigration adds a new migration record
func (postgres Driver) InsertMigration(db shared.Transaction, version string) error {
func (drv Driver) InsertMigration(db shared.Transaction, version string) error {
_, err := db.Exec("INSERT INTO schema_migrations (version) VALUES ($1)", version)
return err
}
// DeleteMigration removes a migration record
func (postgres Driver) DeleteMigration(db shared.Transaction, version string) error {
func (drv Driver) DeleteMigration(db shared.Transaction, version string) error {
_, err := db.Exec("DELETE FROM schema_migrations WHERE version = $1", version)
return err