Implement base to read groups

scm-webapp/src/test/java/sonia/scm/api/v2/resources/Group2GroupDtoMapperTest.java

@@ -0,0 +1,61 @@
+package sonia.scm.api.v2.resources;
+
+import org.apache.shiro.subject.Subject;
+import org.apache.shiro.subject.support.SubjectThreadState;
+import org.apache.shiro.util.ThreadContext;
+import org.apache.shiro.util.ThreadState;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.mapstruct.factory.Mappers;
+import sonia.scm.group.Group;
+
+import javax.ws.rs.core.UriInfo;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class Group2GroupDtoMapperTest {
+
+  private final Group2GroupDtoMapper mapper = Mappers.getMapper(Group2GroupDtoMapper.class);
+  private final UriInfo uriInfo = mock(UriInfo.class);
+  private final Subject subject = mock(Subject.class);
+  private final ThreadState subjectThreadState = new SubjectThreadState(subject);
+
+  private URI expectedBaseUri;
+
+  @Before
+  public void init() throws URISyntaxException {
+    URI baseUri = new URI("http://example.com/base/");
+    expectedBaseUri = baseUri.resolve(GroupV2Resource.GROUPS_PATH_V2 + "/");
+    when(uriInfo.getBaseUri()).thenReturn(baseUri);
+    subjectThreadState.bind();
+    ThreadContext.bind(subject);
+  }
+
+  @After
+  public void unbindSubject() {
+    ThreadContext.unbindSubject();
+  }
+
+  @Test
+  public void shouldMapLinks_forUpdate() {
+    Group group = createDefaultGroup();
+    when(subject.isPermitted("user:modify:abc")).thenReturn(true);
+
+    GroupDto groupDto = mapper.groupToGroupDto(group, uriInfo);
+
+    assertEquals("expected self link",   expectedBaseUri.resolve("abc").toString(), groupDto.getLinks().getLinkBy("self").get().getHref());
+    assertEquals("expected update link", expectedBaseUri.resolve("abc").toString(), groupDto.getLinks().getLinkBy("update").get().getHref());
+  }
+
+  private Group createDefaultGroup() {
+    Group group = new Group();
+    group.setName("abc");
+    group.setCreationDate(1L);
+    return group;
+  }
+}