diff --git a/src/app/entity-groups/research-entities/item-list-elements/sidebar-search-list-elements/org-unit/org-unit-sidebar-search-list-element.component.ts b/src/app/entity-groups/research-entities/item-list-elements/sidebar-search-list-elements/org-unit/org-unit-sidebar-search-list-element.component.ts
index 642c13f562..17e9790593 100644
--- a/src/app/entity-groups/research-entities/item-list-elements/sidebar-search-list-elements/org-unit/org-unit-sidebar-search-list-element.component.ts
+++ b/src/app/entity-groups/research-entities/item-list-elements/sidebar-search-list-elements/org-unit/org-unit-sidebar-search-list-element.component.ts
@@ -5,7 +5,6 @@ import { ItemSearchResult } from '../../../../../shared/object-collection/shared
 import { Component } from '@angular/core';
 import { SidebarSearchListElementComponent } from '../../../../../shared/object-list/sidebar-search-list-element/sidebar-search-list-element.component';
 import { Item } from '../../../../../core/shared/item.model';
-import { isNotEmpty } from '../../../../../shared/empty.util';
 
 @listableObjectComponent('OrgUnitSearchResult', ViewMode.ListElement, Context.SideBarSearchModal)
 @listableObjectComponent('OrgUnitSearchResult', ViewMode.ListElement, Context.SideBarSearchModalCurrent)
diff --git a/src/app/entity-groups/research-entities/item-list-elements/sidebar-search-list-elements/project/project-sidebar-search-list-element.component.ts b/src/app/entity-groups/research-entities/item-list-elements/sidebar-search-list-elements/project/project-sidebar-search-list-element.component.ts
index 0d109c55f0..6fbb9d26fc 100644
--- a/src/app/entity-groups/research-entities/item-list-elements/sidebar-search-list-elements/project/project-sidebar-search-list-element.component.ts
+++ b/src/app/entity-groups/research-entities/item-list-elements/sidebar-search-list-elements/project/project-sidebar-search-list-element.component.ts
@@ -5,7 +5,6 @@ import { ItemSearchResult } from '../../../../../shared/object-collection/shared
 import { Component } from '@angular/core';
 import { SidebarSearchListElementComponent } from '../../../../../shared/object-list/sidebar-search-list-element/sidebar-search-list-element.component';
 import { Item } from '../../../../../core/shared/item.model';
-import { isNotEmpty } from '../../../../../shared/empty.util';
 
 @listableObjectComponent('ProjectSearchResult', ViewMode.ListElement, Context.SideBarSearchModal)
 @listableObjectComponent('ProjectSearchResult', ViewMode.ListElement, Context.SideBarSearchModalCurrent)
diff --git a/src/app/shared/hover-class.directive.spec.ts b/src/app/shared/hover-class.directive.spec.ts
new file mode 100644
index 0000000000..9c593f27c8
--- /dev/null
+++ b/src/app/shared/hover-class.directive.spec.ts
@@ -0,0 +1,35 @@
+import { Component, DebugElement } from '@angular/core';
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { HoverClassDirective } from './hover-class.directive';
+import { By } from '@angular/platform-browser';
+
+@Component({
+  template: `<div dsHoverClass="ds-hover"></div>`
+})
+class TestComponent { }
+
+describe('HoverClassDirective', () => {
+  let component: TestComponent;
+  let fixture: ComponentFixture<TestComponent>;
+  let el: DebugElement;
+
+  beforeEach(() => {
+    fixture = TestBed.configureTestingModule({
+      declarations: [TestComponent, HoverClassDirective]
+    }).createComponent(TestComponent);
+
+    fixture.detectChanges();
+    component = fixture.componentInstance;
+    el = fixture.debugElement.query(By.css('div'));
+  });
+
+  it('should add the class on mouseenter and remove on mouseleave', () => {
+    el.triggerEventHandler('mouseenter', null);
+    fixture.detectChanges();
+    expect(el.nativeElement.classList).toContain('ds-hover');
+
+    el.triggerEventHandler('mouseleave', null);
+    fixture.detectChanges();
+    expect(el.nativeElement.classList).not.toContain('ds-hover');
+  });
+});
diff --git a/src/app/shared/hover-class.directive.ts b/src/app/shared/hover-class.directive.ts
index e5c4ad200e..551e81a463 100644
--- a/src/app/shared/hover-class.directive.ts
+++ b/src/app/shared/hover-class.directive.ts
@@ -3,15 +3,27 @@ import { Directive, ElementRef, HostListener, Input } from '@angular/core';
 @Directive({
   selector: '[dsHoverClass]'
 })
+/**
+ * A directive adding a class to an element when hovered over
+ */
 export class HoverClassDirective {
-​
-  constructor(public elementRef: ElementRef) { }
+  /**
+   * The name of the class to add on hover
+   */
   @Input('dsHoverClass') hoverClass: string;
 ​
+  constructor(public elementRef: ElementRef) { }
+​
+  /**
+   * On mouse enter, add the class to the element's class list
+   */
   @HostListener('mouseenter') onMouseEnter() {
     this.elementRef.nativeElement.classList.add(this.hoverClass);
   }
 ​
+  /**
+   * On mouse leave, remove the class from the element's class list
+   */
   @HostListener('mouseleave') onMouseLeave() {
     this.elementRef.nativeElement.classList.remove(this.hoverClass);
   }