plugin = new LinkField([], 'link', []); $migration = $this->prophesize(MigrationInterface::class); // The plugin's processCckFieldValues() method will call // mergeProcessOfProperty() 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 mergeProcessOfProperty(). $migration->mergeProcessOfProperty(Argument::type('string'), Argument::type('array')) ->will(function ($arguments) use ($migration) { $migration->getProcess()->willReturn($arguments[1]); }); $this->migration = $migration->reveal(); } /** * @covers ::processCckFieldValues */ public function testProcessCckFieldValues() { $this->plugin->processCckFieldValues($this->migration, 'somefieldname', []); $expected = [ 'plugin' => 'd6_cck_link', 'source' => 'somefieldname', ]; $this->assertSame($expected, $this->migration->getProcess()); } }