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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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2
driver/driver.go
View file

@ -15,7 +15,7 @@ type Driver interface {
CreateDatabase(*url.URL) error
DropDatabase(*url.URL) error
CreateMigrationsTable(*sql.DB) error
SelectMigrations(*sql.DB, int) (map[string]struct{}, error)
SelectMigrations(*sql.DB, int) (map[string]bool, error)
InsertMigration(shared.Transaction, string) error
DeleteMigration(shared.Transaction, string) error
}

21
driver/driver_test.go Normal file
View file

@ -0,0 +1,21 @@
package driver_test
import (
"github.com/adrianmacneil/dbmate/driver"
"github.com/adrianmacneil/dbmate/driver/postgres"
"github.com/stretchr/testify/require"
"testing"
)
func TestGet_Postgres(t *testing.T) {
drv, err := driver.Get("postgres")
require.Nil(t, err)
_, ok := drv.(postgres.Driver)
require.Equal(t, true, ok)
}
func TestGet_Error(t *testing.T) {
drv, err := driver.Get("foo")
require.Equal(t, "Unknown driver: foo", err.Error())
require.Nil(t, drv)
}

38
driver/postgres/postgres.go
View file

@ -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

138
driver/postgres/postgres_test.go
View file

@ -31,16 +31,35 @@ func mustClose(c io.Closer) {
}
}
func TestCreateDropDatabase(t *testing.T) {
d := postgres.Driver{}
func prepTestDB(t *testing.T) *sql.DB {
drv := postgres.Driver{}
u := testURL(t)
// drop any existing database
err := d.DropDatabase(u)
err := drv.DropDatabase(u)
require.Nil(t, err)
// create database
err = d.CreateDatabase(u)
err = drv.CreateDatabase(u)
require.Nil(t, err)
// connect database
db, err := sql.Open("postgres", u.String())
require.Nil(t, err)
return db
}
func TestCreateDropDatabase(t *testing.T) {
drv := postgres.Driver{}
u := testURL(t)
// drop any existing database
err := drv.DropDatabase(u)
require.Nil(t, err)
// create database
err = drv.CreateDatabase(u)
require.Nil(t, err)
// check that database exists and we can connect to it
@ -54,7 +73,7 @@ func TestCreateDropDatabase(t *testing.T) {
}()
// drop the database
err = d.DropDatabase(u)
err = drv.DropDatabase(u)
require.Nil(t, err)
// check that database no longer exists
@ -70,34 +89,127 @@ func TestCreateDropDatabase(t *testing.T) {
}
func TestDatabaseExists(t *testing.T) {
d := postgres.Driver{}
drv := postgres.Driver{}
u := testURL(t)
// drop any existing database
err := d.DropDatabase(u)
err := drv.DropDatabase(u)
require.Nil(t, err)
// DatabaseExists should return false
exists, err := d.DatabaseExists(u)
exists, err := drv.DatabaseExists(u)
require.Nil(t, err)
require.Equal(t, false, exists)
// create database
err = d.CreateDatabase(u)
err = drv.CreateDatabase(u)
require.Nil(t, err)
// DatabaseExists should return true
exists, err = d.DatabaseExists(u)
exists, err = drv.DatabaseExists(u)
require.Nil(t, err)
require.Equal(t, true, exists)
}
func TestDatabaseExists_error(t *testing.T) {
d := postgres.Driver{}
func TestDatabaseExists_Error(t *testing.T) {
drv := postgres.Driver{}
u := testURL(t)
u.User = url.User("invalid")
exists, err := d.DatabaseExists(u)
exists, err := drv.DatabaseExists(u)
require.Equal(t, "pq: role \"invalid\" does not exist", err.Error())
require.Equal(t, false, exists)
}
func TestCreateMigrationsTable(t *testing.T) {
drv := postgres.Driver{}
db := prepTestDB(t)
defer mustClose(db)
// migrations table should not exist
count := 0
err := db.QueryRow("select count(*) from schema_migrations").Scan(&count)
require.Equal(t, "pq: relation \"schema_migrations\" does not exist", err.Error())
// create table
err = drv.CreateMigrationsTable(db)
require.Nil(t, err)
// migrations table should exist
err = db.QueryRow("select count(*) from schema_migrations").Scan(&count)
require.Nil(t, err)
// create table should be idempotent
err = drv.CreateMigrationsTable(db)
require.Nil(t, err)
}
func TestSelectMigrations(t *testing.T) {
drv := postgres.Driver{}
db := prepTestDB(t)
defer mustClose(db)
err := drv.CreateMigrationsTable(db)
require.Nil(t, err)
_, err = db.Exec(`insert into schema_migrations (version)
values ('abc2'), ('abc1'), ('abc3')`)
require.Nil(t, err)
migrations, err := drv.SelectMigrations(db, -1)
require.Nil(t, err)
require.Equal(t, true, migrations["abc1"])
require.Equal(t, true, migrations["abc2"])
require.Equal(t, true, migrations["abc2"])
// test limit param
migrations, err = drv.SelectMigrations(db, 1)
require.Nil(t, err)
require.Equal(t, true, migrations["abc3"])
require.Equal(t, false, migrations["abc1"])
require.Equal(t, false, migrations["abc2"])
}
func TestInsertMigration(t *testing.T) {
drv := postgres.Driver{}
db := prepTestDB(t)
defer mustClose(db)
err := drv.CreateMigrationsTable(db)
require.Nil(t, err)
count := 0
err = db.QueryRow("select count(*) from schema_migrations").Scan(&count)
require.Nil(t, err)
require.Equal(t, 0, count)
// insert migration
err = drv.InsertMigration(db, "abc1")
require.Nil(t, err)
err = db.QueryRow("select count(*) from schema_migrations where version = 'abc1'").
Scan(&count)
require.Nil(t, err)
require.Equal(t, 1, count)
}
func TestDeleteMigration(t *testing.T) {
drv := postgres.Driver{}
db := prepTestDB(t)
defer mustClose(db)
err := drv.CreateMigrationsTable(db)
require.Nil(t, err)
_, err = db.Exec(`insert into schema_migrations (version)
values ('abc1'), ('abc2')`)
require.Nil(t, err)
err = drv.DeleteMigration(db, "abc2")
require.Nil(t, err)
count := 0
err = db.QueryRow("select count(*) from schema_migrations").Scan(&count)
require.Nil(t, err)
require.Equal(t, 1, count)
}