Add negative tests for RoleService

mocks/no_role.json

@@ -0,0 +1,8 @@
+{
+    "errorMessages": [
+      "Role with given id not found."
+    ],
+    "errors": {
+    
+    }
+}

role_test.go

@@ -7,6 +7,31 @@ import (
 	"testing"
 )
 
+func TestRoleService_GetList_NoList(t *testing.T) {
+	setup()
+	defer teardown()
+	testAPIEndpoint := "/rest/api/3/role"
+
+	raw, err := ioutil.ReadFile("./mocks/no_roles.json")
+	if err != nil {
+		t.Error(err.Error())
+	}
+
+	testMux.HandleFunc(testAPIEndpoint, func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		testRequestURL(t, r, testAPIEndpoint)
+		fmt.Fprintf(w, string(raw))
+	})
+
+	roles, _, err := testClient.Role.GetList()
+	if roles != nil {
+		t.Errorf("Expected role list has %d entries but should be nil", len(*roles))
+	}
+	if err == nil {
+		t.Errorf("No error given")
+	}
+}
+
 func TestRoleService_GetList(t *testing.T) {
 	setup()
 	defer teardown()
@@ -26,11 +51,37 @@ func TestRoleService_GetList(t *testing.T) {
 	if roles == nil {
 		t.Error("Expected role list. Role list is nil")
 	}
+	if len(*roles) != 2 {
+		t.Errorf("Expected %d roles but got %d", 2, len(*roles))
+	}
 	if err != nil {
 		t.Errorf("Error given: %v", err)
 	}
 }
 
+func TestRoleService_Get_NoRole(t *testing.T) {
+	setup()
+	defer teardown()
+	testAPIEdpoint := "/rest/api/3/role/99999"
+	raw, err := ioutil.ReadFile("./mocks/no_role.json")
+	if err != nil {
+		t.Error(err.Error())
+	}
+	testMux.HandleFunc(testAPIEdpoint, func(writer http.ResponseWriter, request *http.Request) {
+		testMethod(t, request, "GET")
+		testRequestURL(t, request, testAPIEdpoint)
+		fmt.Fprintf(writer, string(raw))
+	})
+
+	role, _, err := testClient.Role.Get(99999)
+	if role != nil {
+		t.Errorf("Expected nil, got role %v", role)
+	}
+	if err == nil {
+		t.Errorf("No error given")
+	}
+}
+
 func TestRoleService_Get(t *testing.T) {
 	setup()
 	defer teardown()
@@ -52,5 +103,4 @@ func TestRoleService_Get(t *testing.T) {
 	if err != nil {
 		t.Errorf("Error given: %s", err)
 	}
-
 }