Flatten package layout

postgres_test.go

@@ -0,0 +1,207 @@
+package main
+
+import (
+	"database/sql"
+	"github.com/stretchr/testify/require"
+	"net/url"
+	"os"
+	"testing"
+)
+
+func postgresTestURL(t *testing.T) *url.URL {
+	str := os.Getenv("POSTGRES_PORT")
+	require.NotEmpty(t, str, "missing POSTGRES_PORT environment variable")
+
+	u, err := url.Parse(str)
+	require.Nil(t, err)
+
+	u.Scheme = "postgres"
+	u.User = url.User("postgres")
+	u.Path = "/dbmate"
+	u.RawQuery = "sslmode=disable"
+
+	return u
+}
+
+func prepTestPostgresDB(t *testing.T) *sql.DB {
+	drv := PostgresDriver{}
+	u := postgresTestURL(t)
+
+	// drop any existing database
+	err := drv.DropDatabase(u)
+	require.Nil(t, err)
+
+	// create database
+	err = drv.CreateDatabase(u)
+	require.Nil(t, err)
+
+	// connect database
+	db, err := sql.Open("postgres", u.String())
+	require.Nil(t, err)
+
+	return db
+}
+
+func TestPostgresCreateDropDatabase(t *testing.T) {
+	drv := PostgresDriver{}
+	u := postgresTestURL(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
+	func() {
+		db, err := sql.Open("postgres", u.String())
+		require.Nil(t, err)
+		defer mustClose(db)
+
+		err = db.Ping()
+		require.Nil(t, err)
+	}()
+
+	// drop the database
+	err = drv.DropDatabase(u)
+	require.Nil(t, err)
+
+	// check that database no longer exists
+	func() {
+		db, err := sql.Open("postgres", u.String())
+		require.Nil(t, err)
+		defer mustClose(db)
+
+		err = db.Ping()
+		require.NotNil(t, err)
+		require.Equal(t, "pq: database \"dbmate\" does not exist", err.Error())
+	}()
+}
+
+func TestPostgresDatabaseExists(t *testing.T) {
+	drv := PostgresDriver{}
+	u := postgresTestURL(t)
+
+	// drop any existing database
+	err := drv.DropDatabase(u)
+	require.Nil(t, err)
+
+	// DatabaseExists should return false
+	exists, err := drv.DatabaseExists(u)
+	require.Nil(t, err)
+	require.Equal(t, false, exists)
+
+	// create database
+	err = drv.CreateDatabase(u)
+	require.Nil(t, err)
+
+	// DatabaseExists should return true
+	exists, err = drv.DatabaseExists(u)
+	require.Nil(t, err)
+	require.Equal(t, true, exists)
+}
+
+func TestPostgresDatabaseExists_Error(t *testing.T) {
+	drv := PostgresDriver{}
+	u := postgresTestURL(t)
+	u.User = url.User("invalid")
+
+	exists, err := drv.DatabaseExists(u)
+	require.Equal(t, "pq: role \"invalid\" does not exist", err.Error())
+	require.Equal(t, false, exists)
+}
+
+func TestPostgresCreateMigrationsTable(t *testing.T) {
+	drv := PostgresDriver{}
+	db := prepTestPostgresDB(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 TestPostgresSelectMigrations(t *testing.T) {
+	drv := PostgresDriver{}
+	db := prepTestPostgresDB(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 TestPostgresInsertMigration(t *testing.T) {
+	drv := PostgresDriver{}
+	db := prepTestPostgresDB(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 TestPostgresDeleteMigration(t *testing.T) {
+	drv := PostgresDriver{}
+	db := prepTestPostgresDB(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)
+}