Issue #458

Author: Luxor

groovy/pom.xml

@@ -52,6 +52,11 @@
             <artifactId>cobertura</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-all</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>

groovy/src/test/java/cucumber/runtime/groovy/GroovyBackendTest.java

@@ -0,0 +1,47 @@
+package cucumber.runtime.groovy;
+
+import cucumber.runtime.CucumberException;
+import cucumber.runtime.io.ResourceLoader;
+import groovy.lang.Closure;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+import static org.mockito.Mockito.verify;
+
+
+@RunWith(MockitoJUnitRunner.class)
+public class GroovyBackendTest {
+    @Mock
+    ResourceLoader resourceLoader;
+    @Mock
+    Closure closure;
+
+    GroovyBackend backend;
+
+    @Before
+    public void setUp() throws Exception {
+        backend = new GroovyBackend(resourceLoader);
+    }
+
+    @Test
+    public void builds_world_by_calling_closure() {
+        backend.registerWorld(closure);
+        backend.buildWorld();
+
+        verify(closure).call();
+    }
+
+    @Test
+    public void builds_default_wold_if_wold_closer_does_not_set() {
+        backend.buildWorld();
+    }
+
+    @Test(expected = CucumberException.class)
+    public void raises_exception_for_two_wolds() {
+        backend.registerWorld(closure);
+        backend.registerWorld(closure);
+    }
+}