LDAP: small improvements to various LDAP parts (grafana#17662)

* Add multildap config example

* Publicize mocks for multildap module

conf/ldap_multiple.toml

@@ -0,0 +1,53 @@
+# --- First LDAP Server ---
+
+[[servers]]
+host = "10.0.0.1"
+port = 389
+use_ssl = false
+start_tls = false
+ssl_skip_verify = false
+bind_dn = "cn=admin,dc=grafana,dc=org"
+bind_password = 'grafana'
+search_filter = "(cn=%s)"
+search_base_dns = ["ou=users,dc=grafana,dc=org"]
+
+[servers.attributes]
+name = "givenName"
+surname = "sn"
+username = "cn"
+member_of = "memberOf"
+email =  "email"
+
+[[servers.group_mappings]]
+group_dn = "cn=admins,ou=groups,dc=grafana,dc=org"
+org_role = "Admin"
+grafana_admin = true
+
+# --- Second LDAP Server ---
+
+[[servers]]
+host = "10.0.0.2"
+port = 389
+use_ssl = false
+start_tls = false
+ssl_skip_verify = false
+
+bind_dn = "cn=admin,dc=grafana,dc=org"
+bind_password = 'grafana'
+search_filter = "(cn=%s)"
+search_base_dns = ["ou=users,dc=grafana,dc=org"]
+
+[servers.attributes]
+name = "givenName"
+surname = "sn"
+username = "cn"
+member_of = "memberOf"
+email =  "email"
+
+[[servers.group_mappings]]
+group_dn = "cn=editors,ou=groups,dc=grafana,dc=org"
+org_role = "Editor"
+
+[[servers.group_mappings]]
+group_dn = "*"
+org_role = "Viewer"

pkg/services/multildap/multildap.go

@@ -13,6 +13,9 @@ var GetConfig = ldap.GetConfig
 // IsEnabled checks if LDAP is enabled
 var IsEnabled = ldap.IsEnabled
 
+// newLDAP return instance of the single LDAP server
+var newLDAP = ldap.New
+
 // ErrInvalidCredentials is returned if username and password do not match
 var ErrInvalidCredentials = ldap.ErrInvalidCredentials
 
@@ -22,9 +25,6 @@ var ErrNoLDAPServers = errors.New("No LDAP servers are configured")
 // ErrDidNotFindUser if request for user is unsuccessful
 var ErrDidNotFindUser = errors.New("Did not find a user")
 
-// newLDAP return instance of the single LDAP server
-var newLDAP = ldap.New
-
 // IMultiLDAP is interface for MultiLDAP
 type IMultiLDAP interface {
 	Login(query *models.LoginUserQuery) (

pkg/services/multildap/testing.go

@@ -0,0 +1,104 @@
+package multildap
+
+import (
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/services/ldap"
+)
+
+// MockLDAP represents testing struct for ldap testing
+type MockLDAP struct {
+	dialCalledTimes  int
+	loginCalledTimes int
+	closeCalledTimes int
+	usersCalledTimes int
+
+	dialErrReturn error
+
+	loginErrReturn error
+	loginReturn    *models.ExternalUserInfo
+
+	usersErrReturn   error
+	usersFirstReturn []*models.ExternalUserInfo
+	usersRestReturn  []*models.ExternalUserInfo
+}
+
+// Login test fn
+func (mock *MockLDAP) Login(*models.LoginUserQuery) (*models.ExternalUserInfo, error) {
+
+	mock.loginCalledTimes = mock.loginCalledTimes + 1
+	return mock.loginReturn, mock.loginErrReturn
+}
+
+// Users test fn
+func (mock *MockLDAP) Users([]string) ([]*models.ExternalUserInfo, error) {
+	mock.usersCalledTimes = mock.usersCalledTimes + 1
+
+	if mock.usersCalledTimes == 1 {
+		return mock.usersFirstReturn, mock.usersErrReturn
+	}
+
+	return mock.usersRestReturn, mock.usersErrReturn
+}
+
+// Auth test fn
+func (mock *MockLDAP) Auth(string, string) error {
+	return nil
+}
+
+// Dial test fn
+func (mock *MockLDAP) Dial() error {
+	mock.dialCalledTimes = mock.dialCalledTimes + 1
+	return mock.dialErrReturn
+}
+
+// Close test fn
+func (mock *MockLDAP) Close() {
+	mock.closeCalledTimes = mock.closeCalledTimes + 1
+}
+
+// MockMultiLDAP represents testing struct for multildap testing
+type MockMultiLDAP struct {
+	LoginCalledTimes int
+	UsersCalledTimes int
+	UserCalledTimes  int
+
+	UsersResult []*models.ExternalUserInfo
+}
+
+// Login test fn
+func (mock *MockMultiLDAP) Login(query *models.LoginUserQuery) (
+	*models.ExternalUserInfo, error,
+) {
+	mock.LoginCalledTimes = mock.LoginCalledTimes + 1
+	return nil, nil
+}
+
+// Users test fn
+func (mock *MockMultiLDAP) Users(logins []string) (
+	[]*models.ExternalUserInfo, error,
+) {
+	mock.UsersCalledTimes = mock.UsersCalledTimes + 1
+	return mock.UsersResult, nil
+}
+
+// User test fn
+func (mock *MockMultiLDAP) User(login string) (
+	*models.ExternalUserInfo, error,
+) {
+	mock.UserCalledTimes = mock.UserCalledTimes + 1
+	return nil, nil
+}
+
+func setup() *MockLDAP {
+	mock := &MockLDAP{}
+
+	newLDAP = func(config *ldap.ServerConfig) ldap.IServer {
+		return mock
+	}
+
+	return mock
+}
+
+func teardown() {
+	newLDAP = ldap.New
+}