refactor(text-bg-color): host binding, cleanup, tests

Author: xidedix

projects/coreui-angular/src/lib/utilities/text-bg-color.directive.spec.ts

@@ -1,11 +1,38 @@
-import { TestBed } from '@angular/core/testing';
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { Component, DebugElement } from '@angular/core';
+import { By } from '@angular/platform-browser';
 import { TextBgColorDirective } from './text-bg-color.directive';
 
+@Component({
+  imports: [TextBgColorDirective],
+  template: '<div cTextBgColor="primary"></div>'
+})
+class TestComponent {}
+
 describe('TextBgColorDirective', () => {
+  let component: TestComponent;
+  let fixture: ComponentFixture<TestComponent>;
+  let debugElement: DebugElement;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [TestComponent]
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(TestComponent);
+    component = fixture.componentInstance;
+    debugElement = fixture.debugElement.query(By.directive(TextBgColorDirective));
+    fixture.detectChanges();
+  });
+
   it('should create an instance', () => {
     TestBed.runInInjectionContext(() => {
       const directive = new TextBgColorDirective();
       expect(directive).toBeTruthy();
     });
   });
+
+  it('should have css classes', () => {
+    expect(debugElement.nativeElement).toHaveClass('text-bg-primary');
+  });
 });

projects/coreui-angular/src/lib/utilities/text-bg-color.directive.ts

@@ -1,8 +1,11 @@
-import { Directive, HostBinding, input, InputSignal } from '@angular/core';
+import { computed, Directive, input, InputSignal } from '@angular/core';
 import { Colors } from '../coreui.types';
 
 @Directive({
-  selector: '[cTextBgColor]'
+  selector: '[cTextBgColor]',
+  host: {
+    '[class]': 'hostClasses()'
+  }
 })
 export class TextBgColorDirective {
   /**
@@ -11,11 +14,10 @@ export class TextBgColorDirective {
    */
   readonly textBgColor: InputSignal<Colors> = input('', { alias: 'cTextBgColor' });
 
-  @HostBinding('class')
-  get hostClasses(): any {
+  readonly hostClasses = computed(() => {
     const color = this.textBgColor();
     return {
       [`text-bg-${color}`]: !!color
-    };
-  }
+    } as Record<string, boolean>;
+  });
 }