public function testDuplicateStylesheetModulesShouldNotBeAllowed() { $this->helper->addStylesheetModule('dijit.themes.tundra'); $stylesheets = $this->helper->getStylesheetModules(); $this->assertContains('dijit.themes.tundra', $stylesheets); $this->helper->addStylesheetModule('dijit.themes.tundra'); $stylesheets = $this->helper->getStylesheetModules(); $this->assertEquals(1, count($stylesheets)); $this->assertContains('dijit.themes.tundra', $stylesheets); }