test(state): implement rxEffects creation function spec

hoebbelsB · hoebbelsB · commit 13269711ef74 · 2023-09-25T13:07:58.000+02:00
diff --git a/libs/state/effects/spec/effects-funtion.spec.ts b/libs/state/effects/spec/effects-funtion.spec.ts
@@ -0,0 +1,69 @@
+import { Component } from '@angular/core';
+import { TestBed } from '@angular/core/testing';
+import { RxEffects } from '@rx-angular/state/effects';
+import { of, tap } from 'rxjs';
+import { rxEffects, RxEffectsSetupFn } from '../src/lib/effects';
+
+describe(rxEffects, () => {
+  it('should create RxEffects instance', () => {
+    const { component } = setupComponent();
+    expect(component.effects).toBeInstanceOf(RxEffects);
+  });
+
+  it('should register an observable', () => {
+    const spy = jest.fn();
+    setupComponent(({ register }) => register(of('src').pipe(tap(spy))));
+    expect(spy).toHaveBeenCalledWith('src');
+  });
+
+  it('should register an observable and sideEffect fn', () => {
+    const spy = jest.fn();
+    setupComponent(({ register }) => register(of('src'), spy));
+    expect(spy).toHaveBeenCalledWith('src');
+  });
+
+  it('should register multiple observables', () => {
+    const spy = jest.fn();
+    setupComponent(({ register }) => {
+      register(of('src').pipe(tap(spy)));
+      register(of('src2'), spy);
+    });
+    expect(spy.mock.calls[0][0]).toEqual('src');
+    expect(spy.mock.calls[1][0]).toEqual('src2');
+  });
+
+  it('should register a sideEffect fn on destroy', () => {
+    const spy = jest.fn();
+    const { fixture } = setupComponent(({ registerOnDestroy }) =>
+      registerOnDestroy(spy)
+    );
+    fixture.destroy();
+    expect(spy).toHaveBeenCalledWith(true);
+  });
+
+  it('should call ngOnDestroy', () => {
+    const { fixture, component } = setupComponent();
+    const spy = jest.spyOn(component.effects, 'ngOnDestroy');
+    expect(spy).not.toHaveBeenCalled();
+    fixture.destroy();
+    expect(spy).toHaveBeenCalled();
+  });
+});
+
+function setupComponent(setupFn?: RxEffectsSetupFn) {
+  @Component({})
+  class TestComponent {
+    readonly effects = rxEffects(setupFn);
+  }
+
+  TestBed.configureTestingModule({
+    declarations: [TestComponent],
+  });
+
+  const fixture = TestBed.createComponent(TestComponent);
+
+  return {
+    fixture,
+    component: fixture.componentInstance,
+  };
+}
