Fix and test for delete user (#1713)

* Fix and test for delete user

* Run updates in batches

* Unit test

models/unit_tests.go

@@ -0,0 +1,92 @@
+// Copyright 2016 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package models
+
+import (
+	"testing"
+
+	"github.com/go-xorm/core"
+	"github.com/go-xorm/xorm"
+	_ "github.com/mattn/go-sqlite3" // for the test engine
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/testfixtures.v2"
+)
+
+// NonexistentID an ID that will never exist
+const NonexistentID = 9223372036854775807
+
+// CreateTestEngine create an xorm engine for testing
+func CreateTestEngine() error {
+	var err error
+	x, err = xorm.NewEngine("sqlite3", "file::memory:?cache=shared")
+	if err != nil {
+		return err
+	}
+	x.SetMapper(core.GonicMapper{})
+	if err = x.StoreEngine("InnoDB").Sync2(tables...); err != nil {
+		return err
+	}
+
+	return InitFixtures(&testfixtures.SQLite{}, "fixtures/")
+}
+
+// TestFixturesAreConsistent assert that test fixtures are consistent
+func TestFixturesAreConsistent(t *testing.T) {
+	assert.NoError(t, PrepareTestDatabase())
+	CheckConsistencyForAll(t)
+}
+
+// PrepareTestDatabase load test fixtures into test database
+func PrepareTestDatabase() error {
+	return LoadFixtures()
+}
+
+func loadBeanIfExists(bean interface{}, conditions ...interface{}) (bool, error) {
+	sess := x.NewSession()
+	defer sess.Close()
+
+	for _, cond := range conditions {
+		sess = sess.Where(cond)
+	}
+	return sess.Get(bean)
+}
+
+// BeanExists for testing, check if a bean exists
+func BeanExists(t *testing.T, bean interface{}, conditions ...interface{}) bool {
+	exists, err := loadBeanIfExists(bean, conditions...)
+	assert.NoError(t, err)
+	return exists
+}
+
+// AssertExistsAndLoadBean assert that a bean exists and load it from the test
+// database
+func AssertExistsAndLoadBean(t *testing.T, bean interface{}, conditions ...interface{}) interface{} {
+	exists, err := loadBeanIfExists(bean, conditions...)
+	assert.NoError(t, err)
+	assert.True(t, exists,
+		"Expected to find %+v (of type %T, with conditions %+v), but did not",
+		bean, bean, conditions)
+	return bean
+}
+
+// AssertNotExistsBean assert that a bean does not exist in the test database
+func AssertNotExistsBean(t *testing.T, bean interface{}, conditions ...interface{}) {
+	exists, err := loadBeanIfExists(bean, conditions...)
+	assert.NoError(t, err)
+	assert.False(t, exists)
+}
+
+// AssertSuccessfulInsert assert that beans is successfully inserted
+func AssertSuccessfulInsert(t *testing.T, beans ...interface{}) {
+	_, err := x.Insert(beans...)
+	assert.NoError(t, err)
+}
+
+// AssertCount assert the count of a bean
+func AssertCount(t *testing.T, bean interface{}, expected interface{}) {
+	actual, err := x.Count(bean)
+	assert.NoError(t, err)
+	assert.EqualValues(t, expected, actual)
+}