plugin = new TaxonomyTermReference([], 'taxonomy', []); $migration = $this->prophesize(MigrationInterface::class); // The plugin's processCckFieldValues() method will call // setProcessOfProperty() and return nothing. So, in order to examine the // process pipeline created by the plugin, we need to ensure that // getProcess() always returns the last input to setProcessOfProperty(). $migration->setProcessOfProperty(Argument::type('string'), Argument::type('array')) ->will(function ($arguments) use ($migration) { $migration->getProcess()->willReturn($arguments[1]); }); $this->migration = $migration->reveal(); } /** * @covers ::processCckFieldValues */ public function testProcessCckFieldValues() { $this->plugin->processFieldValues($this->migration, 'somefieldname', []); $expected = [ 'plugin' => 'sub_process', 'source' => 'somefieldname', 'process' => [ 'target_id' => 'tid', ], ]; $this->assertSame($expected, $this->migration->getProcess()); } }