add more unit tests; re-enable random_int warning in functions.inc.php for old php versions etc etc

tests/DbBasicTest.php

@@ -0,0 +1,48 @@
+<?php
+
+require_once('common.php');
+
+class DbBasicTest extends \PHPUnit\Framework\TestCase {
+    public function testInsertDeleteDomain() {
+        $domain = "test". uniqid() . '.com';
+
+        $username = 'testusername' . uniqid();
+
+        $this->assertEquals(
+            1,
+            db_insert(
+                'domain',
+                array('domain' => $domain, 'description' => '', 'transport' => '', 'password_expiry' => 99)
+            )
+        );
+
+
+        $this->assertEquals(1,
+            db_insert(
+                'mailbox',
+                array('username' => $username, 'password' => 'blah', 'name' => 'blah', 'maildir' => 'blah', 'local_part' => 'blah', 'domain' => $domain,)
+            )
+        );
+
+        $this->assertEquals(1,
+            db_update(
+                'mailbox',
+                'username',
+                $username,
+                array('name' => 'blah updated')
+            )
+        );
+
+        $ret = db_query("SELECT * FROM mailbox WHERE username = '$username'");
+
+        $this->assertEquals(1, $ret['rows']);
+        $data = db_assoc($ret['result']);
+
+        $this->assertEquals($data['name'], 'blah updated');
+
+        $this->assertEquals(1, db_delete('mailbox', 'username', $username));
+        $this->assertEquals(1, db_delete('domain', 'domain', $domain));
+    }
+}
+
+/* vim: set expandtab softtabstop=4 tabstop=4 shiftwidth=4: */