diff --git a/project-manager/src/app/blog/blog-entry/blog-entry.component.spec.ts b/project-manager/src/app/blog/blog-entry/blog-entry.component.spec.ts
index b48ab04..ff2f6b7 100644
--- a/project-manager/src/app/blog/blog-entry/blog-entry.component.spec.ts
+++ b/project-manager/src/app/blog/blog-entry/blog-entry.component.spec.ts
@@ -9,7 +9,7 @@ describe('Blog Entry Isolated Test', () => {
   it('should render DOM correctly according to Input', () => {
     // Umgebung initialisieren
     TestBed.configureTestingModule({
-      declarations: [BlogEntryComponent],
+      declarations: [BlogEntryComponent]
     });
     const fixture = TestBed.createComponent(BlogEntryComponent);
     const blogEntryComponent : BlogEntryComponent = fixture.componentInstance;
diff --git a/project-manager/src/app/model-driven-form/model-driven-form.component.spec.ts b/project-manager/src/app/model-driven-form/model-driven-form.component.spec.ts
index cbc9c1e..1fd905a 100644
--- a/project-manager/src/app/model-driven-form/model-driven-form.component.spec.ts
+++ b/project-manager/src/app/model-driven-form/model-driven-form.component.spec.ts
@@ -1,19 +1,67 @@
-import {ReactiveFormsModule} from '@angular/forms';
+import {FormGroup, ReactiveFormsModule} from '@angular/forms';
 import {TestBed} from '@angular/core/testing';
 import {ModelDrivenFormComponent} from './model-driven-form.component';
 import {UserService} from '../services/user-service/user.service';
-import {ShowErrorComponentModelDriven} from "../show-error/show-error-model-driven.component";
 import {TaskServiceModelForm} from "../services/task-service/task-model-form.service";
-
-beforeEach(() => {
-  TestBed.configureTestingModule({
-    imports: [ReactiveFormsModule],
-    providers: [TaskServiceModelForm, UserService],
-    declarations: [ModelDrivenFormComponent, ShowErrorComponentModelDriven]
-  });
-});
+import {ShowErrorComponentModelDriven} from "../show-error/show-error-model-driven.component";
+import {generateRandomString} from "../../test/test.helper";
 
 describe('Model Driven Form', () => {
 
+  let fixture ;
+  let form ;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [ReactiveFormsModule],
+      providers: [TaskServiceModelForm, UserService],
+      declarations: [ModelDrivenFormComponent, ShowErrorComponentModelDriven]
+    });
+    fixture = TestBed.createComponent(ModelDrivenFormComponent);
+    form = fixture.componentInstance.taskForm;
+  });
+
+  it('should show error on state ne BACKLOG and no Assignee given', () => {
+    const stateControl = form.get('state');
+    expect(form.errors).toBeNull();
+    stateControl.setValue('IN_PROGRESS');
+    expect(form.errors).toEqual({assigneeRequired: true});
+  });
+
+  it('should show error on tag name provided with gt 0 and lt 3', () => {
+    // "add tag" Aufruf starten -> neue FormGroup wird erstellt
+    const tagControlGroup : FormGroup = fixture.componentInstance.createTagControl()
+    const tagLabel = tagControlGroup.get('label');
+    expectErrorOnInput(tagLabel, '');
+    expectErrorOnInput(tagLabel, 'xy', {requiredLength: 3, actualLength: 2}, 'minlength');
+  });
+
+  it('should show error in description gt 2000 signs', () => {
+    const descriptionControl = form.get('description');
+    expectErrorOnInput(descriptionControl, generateRandomString(2000));
+    expectErrorOnInput(descriptionControl, generateRandomString(2001), {requiredLength: 2000, actualLength: 2001}, 'maxlength');
+  });
+
+  it('should show error on email not matching email-pattern', () => {
+    const assigneeFormGroup = form.get('assignee');
+    const assigneeEMail = assigneeFormGroup.get('email');
+    const invalidEMailErrorObject = {invalidEMail: true};
+    expectErrorOnInput(assigneeEMail, 'test', invalidEMailErrorObject);
+    expectErrorOnInput(assigneeEMail, 'test@web', invalidEMailErrorObject);
+    expectErrorOnInput(assigneeEMail, 'test@web.d', invalidEMailErrorObject);
+    expectErrorOnInput(assigneeEMail, 'test@web.de');
+  });
+
+  function expectErrorOnInput(formControl, inputString, expectedErrorObject?, expectedErrorAttribute?){
+    formControl.setValue(inputString);
+    if (expectedErrorObject && expectedErrorAttribute) {
+        expect(formControl.errors[expectedErrorAttribute]).toEqual(expectedErrorObject);
+    } else if (expectedErrorObject) {
+        expect(formControl.errors).toEqual(expectedErrorObject);
+    } else {
+      expect(formControl.errors).toBeNull();
+    }
+  }
+
 
 });
diff --git a/project-manager/src/test/test.helper.ts b/project-manager/src/test/test.helper.ts
new file mode 100644
index 0000000..0f0743b
--- /dev/null
+++ b/project-manager/src/test/test.helper.ts
@@ -0,0 +1,10 @@
+
+// method to create random string of given length, from:
+// http://stackoverflow.com/questions/16106701/how-to-generate-a-random-string-of-letters-and-numbers-in-javascript
+export function generateRandomString(len) {
+  var text = "";
+  var charset = "abcdefghijklmnopqrstuvwxyz0123456789";
+  for( var i=0; i < len; i++ )
+    text += charset.charAt(Math.floor(Math.random() * charset.length));
+  return text;
+}