From b79648e0304dc5eb49b2f6f007e7ef750d729390 Mon Sep 17 00:00:00 2001
From: Niall Sheridan <nsheridan@gmail.com>
Date: Tue, 7 Aug 2018 22:08:23 +0100
Subject: Add migrations tests

---
 server/store/migrations/migrations_test.go | 102 +++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 server/store/migrations/migrations_test.go

(limited to 'server/store/migrations')

diff --git a/server/store/migrations/migrations_test.go b/server/store/migrations/migrations_test.go
new file mode 100644
index 0000000..ad2259b
--- /dev/null
+++ b/server/store/migrations/migrations_test.go
@@ -0,0 +1,102 @@
+package migrations
+
+import (
+	"database/sql"
+	"fmt"
+	"io/ioutil"
+	"math/rand"
+	"os"
+	"os/user"
+	"path"
+	"path/filepath"
+	"reflect"
+	"testing"
+
+	"github.com/go-sql-driver/mysql"
+	_ "github.com/mattn/go-sqlite3"
+	migrate "github.com/rubenv/sql-migrate"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSQLiteMigrations(t *testing.T) {
+	subdir := "sqlite3"
+	db, err := sql.Open(subdir, ":memory:")
+	assert.NoError(t, err)
+	defer db.Close()
+	runMigrations(t, db, subdir)
+}
+
+func TestMySQLMigrations(t *testing.T) {
+	if os.Getenv("MYSQL_TEST") == "" {
+		t.Skip("No MYSQL_TEST environment variable")
+	}
+	subdir := "mysql"
+	dsn := mysql.NewConfig()
+	dsn.Net = "tcp"
+	dsn.ParseTime = true
+	dsn.Addr = os.Getenv("MYSQL_TEST_HOST")
+	dsn.Passwd = os.Getenv("MYSQL_TEST_PASS")
+	u, _ := user.Current()
+	if testUser, ok := os.LookupEnv("MYSQL_TEST_USER"); ok {
+		dsn.User = testUser
+	} else {
+		dsn.User = u.Username
+	}
+	db, err := sql.Open(subdir, dsn.FormatDSN())
+	assert.NoError(t, err)
+
+	rnd := make([]byte, 4)
+	rand.Read(rnd)
+	suffix := fmt.Sprintf("_%x", string(rnd))
+	_, err = db.Exec("CREATE DATABASE migrations_test" + suffix)
+	assert.NoError(t, err)
+	_, err = db.Exec("USE migrations_test" + suffix)
+	assert.NoError(t, err)
+	runMigrations(t, db, subdir)
+	db.Exec("DROP DATABASE IF EXISTS migrations_test" + suffix)
+	db.Close()
+}
+
+func runMigrations(t *testing.T, db *sql.DB, directory string) {
+	m := &migrate.FileMigrationSource{
+		Dir: directory,
+	}
+	files, err := filepath.Glob(path.Join(directory, "*.sql"))
+	// Verify that there is at least one migration to run
+	assert.NotEmpty(t, files)
+	assert.NoError(t, err)
+	// Verify that migrating up works
+	n, err := migrate.Exec(db, directory, m, migrate.Up)
+	assert.Len(t, files, n)
+	assert.NoError(t, err)
+	// Verify that a subsequent run has no migrations
+	n, err = migrate.Exec(db, directory, m, migrate.Up)
+	assert.Equal(t, 0, n)
+	assert.NoError(t, err)
+	// Verify that reversing migrations works
+	n, err = migrate.Exec(db, directory, m, migrate.Down)
+	assert.Len(t, files, n)
+}
+
+// Test that all migration directories contain the same set of migrations files.
+func TestMigationDirectoryContents(t *testing.T) {
+	names := map[string][]string{}
+	contents, err := ioutil.ReadDir(".")
+	assert.NoError(t, err)
+	for _, i := range contents {
+		if i.IsDir() {
+			dir := path.Join(i.Name(), "*.sql")
+			files, _ := filepath.Glob(dir)
+			trimmed := []string{}
+			for _, f := range files {
+				trimmed = append(trimmed, filepath.Base(f))
+			}
+			names[i.Name()] = trimmed
+		}
+	}
+	// Use one entry from the `names` map as a reference for all the others.
+	first := names[reflect.ValueOf(names).MapKeys()[0].String()]
+	for _, v := range names {
+		assert.EqualValues(t, first, v)
+	}
+}
-- 
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