authplain: Add tests for group retrieval

lib/plugins/authplain/_test/conf/auth.users.php

@@ -0,0 +1,16 @@
+# users.auth.php
+# <?php exit()?>
+# Don't modify the lines above
+#
+# Userfile
+#
+# Format:
+#
+# login:passwordhash:Real Name:email:groups,comma,separated
+
+
+user_1:$1$tGu7CW5z$VpsMjRIx5tbyOJaQ2SP23.:Admin:admin@example.com:user,first_group
+user_2:$1$2uJ5C3ib$edo0EDEb/yLAFHme7RK851:User 2:user2@example.com:user,second_group,third_group
+user_3:$1$yqnlDqgZ$Sste968uKhuxH6wIQt6/D/:User 3:user3@example.com:user,fourth_group,first_group,third_group
+user_4:$1$tXjajS9s$peoGPBQep.P245H1Lfloj0:User 4:user4@example.com:user,third_group
+user_5:$1$IWrqdhol$xXOmufjZ2hW1aAVp7zDP.1:User 5:user5@example.com:user,second_group,fifth_group

lib/plugins/authplain/_test/userdata.test.php

@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * Class userdata_test
+ *
+ * Test group retrieval
+ *
+ * @group plugins
+ */
+class userdata_test extends DokuWikiTest
+{
+    /** @var  auth_plugin_authplain */
+    protected $auth;
+
+    /**
+     * Load auth with test conf
+     * @throws Exception
+     */
+    public function setUp()
+    {
+        parent::setUp();
+        global $config_cascade;
+        $config_cascade['plainauth.users']['default'] = __DIR__ . '/conf/auth.users.php';
+        $this->auth = new auth_plugin_authplain();
+    }
+
+    /**
+     * Test that all groups are retrieved in the correct order, without duplicates
+     */
+    public function test_retrieve_groups()
+    {
+        $expected = ['user', 'first_group', 'second_group', 'third_group', 'fourth_group', 'fifth_group'];
+        $actual = $this->auth->retrieveGroups();
+        $this->assertEquals($expected, $actual);
+    }
+
+    /**
+     * Test with small and large limits
+     */
+    public function test_retrieve_groups_limit()
+    {
+        $expected = ['user', 'first_group'];
+        $actual = $this->auth->retrieveGroups(0, 2);
+        $this->assertEquals($expected, $actual);
+
+        $expected = ['user', 'first_group', 'second_group', 'third_group', 'fourth_group', 'fifth_group'];
+        $actual = $this->auth->retrieveGroups(0, 20);
+        $this->assertEquals($expected, $actual);
+    }
+
+    /**
+     * Test with small and large offsets
+     */
+    public function test_retrieve_groups_offset()
+    {
+        $expected = ['third_group', 'fourth_group', 'fifth_group'];
+        $actual = $this->auth->retrieveGroups(3,10);
+        $this->assertEquals($expected, $actual);
+
+        $expected = [];
+        $actual = $this->auth->retrieveGroups(10,3);
+        $this->assertEquals($expected, $actual);
+    }
+}