package testhelper; import static net.sourceforge.plantuml.test.PlantUmlTestUtils.exportDiagram; import static org.assertj.core.api.Assertions.assertThat; import org.junit.jupiter.api.Test; class TestHelper { @Test public void test_help_themes() throws Exception { final String output = exportDiagram( "@startuml", "help themes", "@enduml" ).asString(); assertThat(output) .startsWith(" \nHelp on themes") .contains("bluegray", "hacker"); } }