--- /dev/null
+<?php
+
+namespace Drupal\Tests\migrate\Unit\process;
+
+use Drupal\migrate\Plugin\migrate\process\MachineName;
+
+/**
+ * Tests the machine name process plugin.
+ *
+ * @group migrate
+ */
+class MachineNameTest extends MigrateProcessTestCase {
+
+ /**
+ * The mock transliteration.
+ *
+ * @var \Drupal\Component\Transliteration\TransliterationInterface
+ */
+ protected $transliteration;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ $this->transliteration = $this->getMockBuilder('Drupal\Component\Transliteration\TransliterationInterface')
+ ->disableOriginalConstructor()
+ ->getMock();
+ $this->row = $this->getMockBuilder('Drupal\migrate\Row')
+ ->disableOriginalConstructor()
+ ->getMock();
+ $this->migrateExecutable = $this->getMockBuilder('Drupal\migrate\MigrateExecutable')
+ ->disableOriginalConstructor()
+ ->getMock();
+ parent::setUp();
+ }
+
+ /**
+ * Tests machine name transformation of non-alphanumeric characters.
+ */
+ public function testMachineNames() {
+
+ // Tests the following transformations:
+ // - non-alphanumeric character (including spaces) -> underscore,
+ // - Uppercase -> lowercase,
+ // - Multiple consecutive underscore -> single underscore.
+ $human_name_ascii = 'foo2, the.bar;2*&the%baz!YEE____HaW ';
+ $human_name = $human_name_ascii . 'áéő';
+ $expected_result = 'foo2_the_bar_2_the_baz_yee_haw_aeo';
+ // Test for calling transliterate on mock object.
+ $this->transliteration
+ ->expects($this->once())
+ ->method('transliterate')
+ ->with($human_name)
+ ->will($this->returnValue($human_name_ascii . 'aeo'));
+
+ $plugin = new MachineName([], 'machine_name', [], $this->transliteration);
+ $value = $plugin->transform($human_name, $this->migrateExecutable, $this->row, 'destinationproperty');
+ $this->assertEquals($expected_result, $value);
+ }
+
+}