test invalid URL on repo creation

Also properly return a 204 response on methods that don't include a
response body.  This has no actual effect on current tests, but more
accurately reflects what the GitHub API really returns and might make a
difference in the future.

github/orgs_test.go

@@ -219,6 +219,7 @@ func TestOrganizationsService_CheckMembership(t *testing.T) {
 		if m := "GET"; m != r.Method {
 			t.Errorf("Request method = %v, want %v", r.Method, m)
 		}
+		w.WriteHeader(http.StatusNoContent)
 	})
 
 	member, err := client.Organizations.CheckMembership("o", "u")
@@ -294,6 +295,7 @@ func TestOrganizationsService_CheckPublicMembership(t *testing.T) {
 		if m := "GET"; m != r.Method {
 			t.Errorf("Request method = %v, want %v", r.Method, m)
 		}
+		w.WriteHeader(http.StatusNoContent)
 	})
 
 	member, err := client.Organizations.CheckPublicMembership("o", "u")
@@ -634,6 +636,7 @@ func TestOrganizationsService_AddTeamMember(t *testing.T) {
 		if m := "PUT"; m != r.Method {
 			t.Errorf("Request method = %v, want %v", r.Method, m)
 		}
+		w.WriteHeader(http.StatusNoContent)
 	})
 
 	err := client.Organizations.AddTeamMember(1, "u")
@@ -660,6 +663,7 @@ func TestOrganizationsService_RemoveTeamMember(t *testing.T) {
 		if m := "DELETE"; m != r.Method {
 			t.Errorf("Request method = %v, want %v", r.Method, m)
 		}
+		w.WriteHeader(http.StatusNoContent)
 	})
 
 	err := client.Organizations.RemoveTeamMember(1, "u")
@@ -686,6 +690,7 @@ func TestOrganizationsService_PublicizeMembership(t *testing.T) {
 		if m := "PUT"; m != r.Method {
 			t.Errorf("Request method = %v, want %v", r.Method, m)
 		}
+		w.WriteHeader(http.StatusNoContent)
 	})
 
 	err := client.Organizations.PublicizeMembership("o", "u")
@@ -712,6 +717,7 @@ func TestOrganizationsService_ConcealMembership(t *testing.T) {
 		if m := "DELETE"; m != r.Method {
 			t.Errorf("Request method = %v, want %v", r.Method, m)
 		}
+		w.WriteHeader(http.StatusNoContent)
 	})
 
 	err := client.Organizations.ConcealMembership("o", "u")
@@ -760,6 +766,7 @@ func TestOrganizationsService_CheckTeamRepo_true(t *testing.T) {
 		if m := "GET"; m != r.Method {
 			t.Errorf("Request method = %v, want %v", r.Method, m)
 		}
+		w.WriteHeader(http.StatusNoContent)
 	})
 
 	managed, err := client.Organizations.CheckTeamRepo(1, "o", "r")

github/repos_test.go

@@ -216,6 +216,16 @@ func TestRepositoriesService_Create_org(t *testing.T) {
 	}
 }
 
+func TestRepositoriesService_Create_invalidOrg(t *testing.T) {
+	_, err := client.Repositories.Create("%", nil)
+	if err == nil {
+		t.Errorf("Expected error to be returned")
+	}
+	if err, ok := err.(*url.Error); !ok {
+		t.Errorf("Expected URL parse error, got %+v", err)
+	}
+}
+
 func TestRepositoriesService_Get(t *testing.T) {
 	setup()
 	defer teardown()