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feat: minimal signals + RemoteData template with a users feature

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Extracted from atomic-design-poc: RemoteData<E,T> (bare union + fromResource,
no combinators) + a trimmed <app-async> switch, no Elm-style store — state is
resource() plus one plain signal. Minimal DDD layering per context
(domain/infrastructure/application/ui) combined with atomic design inside
ui/ (atoms/molecules/organisms/templates/pages), mirroring the POC's
conventions at template scale.

One worked feature (users/): a list with a click-through to a detail view
(its own independent resource() fetch) and a Back action. Tests are
BDD-style (describe/it, one assertion per it) and black-box (assert
rendered DOM/emitted events only) - 100% branch/line coverage. README.md
documents what's deliberately omitted vs. the POC and the concrete growth
path back to it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
eho
2026-07-31 23:27:09 +02:00
co-authored by Claude Sonnet 5
parent 209df1ae5a
commit 927404afd7
29 changed files with 778 additions and 418 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/app/app.config.ts
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@@ -1,8 +1,5 @@
import { ApplicationConfig, provideBrowserGlobalErrorListeners } from '@angular/core';
export const appConfig: ApplicationConfig = {
providers: [
provideBrowserGlobalErrorListeners(),
]
providers: [provideBrowserGlobalErrorListeners()],
};
src/app/app.html
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@@ -1,343 +1 @@
<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
<!-- * * * * * * * * * * * The content below * * * * * * * * * * * -->
<!-- * * * * * * * * * * is only a placeholder * * * * * * * * * * -->
<!-- * * * * * * * * * * and can be replaced. * * * * * * * * * * -->
<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
<!-- * * * * * * * * * Delete the template below * * * * * * * * * -->
<!-- * * * * * * * to get started with your project! * * * * * * * -->
<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
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class="pill"
[href]="item.link"
target="_blank"
rel="noopener"
>
<span>{{ item.title }}</span>
<svg
xmlns="http://www.w3.org/2000/svg"
height="14"
viewBox="0 -960 960 960"
width="14"
fill="currentColor"
>
<path
d="M200-120q-33 0-56.5-23.5T120-200v-560q0-33 23.5-56.5T200-840h280v80H200v560h560v-280h80v280q0 33-23.5 56.5T760-120H200Zm188-212-56-56 372-372H560v-80h280v280h-80v-144L388-332Z"
/>
</svg>
</a>
}
</div>
<div class="social-links">
<a
href="https://github.com/angular/angular"
aria-label="Github"
target="_blank"
rel="noopener"
>
<svg
width="25"
height="24"
viewBox="0 0 25 24"
fill="none"
xmlns="http://www.w3.org/2000/svg"
alt="Github"
>
<path
d="M12.3047 0C5.50634 0 0 5.50942 0 12.3047C0 17.7423 3.52529 22.3535 8.41332 23.9787C9.02856 24.0946 9.25414 23.7142 9.25414 23.3871C9.25414 23.0949 9.24389 22.3207 9.23876 21.2953C5.81601 22.0377 5.09414 19.6444 5.09414 19.6444C4.53427 18.2243 3.72524 17.8449 3.72524 17.8449C2.61064 17.082 3.81137 17.0973 3.81137 17.0973C5.04697 17.1835 5.69604 18.3647 5.69604 18.3647C6.79321 20.2463 8.57636 19.7029 9.27978 19.3881C9.39052 18.5924 9.70736 18.0499 10.0591 17.7423C7.32641 17.4347 4.45429 16.3765 4.45429 11.6618C4.45429 10.3185 4.9311 9.22133 5.72065 8.36C5.58222 8.04931 5.16694 6.79833 5.82831 5.10337C5.82831 5.10337 6.85883 4.77319 9.2121 6.36459C10.1965 6.09082 11.2424 5.95546 12.2883 5.94931C13.3342 5.95546 14.3801 6.09082 15.3644 6.36459C17.7023 4.77319 18.7328 5.10337 18.7328 5.10337C19.3942 6.79833 18.9789 8.04931 18.8559 8.36C19.6403 9.22133 20.1171 10.3185 20.1171 11.6618C20.1171 16.3888 17.2409 17.4296 14.5031 17.7321C14.9338 18.1012 15.3337 18.8559 15.3337 20.0084C15.3337 21.6552 15.3183 22.978 15.3183 23.3779C15.3183 23.7009 15.5336 24.0854 16.1642 23.9623C21.0871 22.3484 24.6094 17.7341 24.6094 12.3047C24.6094 5.50942 19.0999 0 12.3047 0Z"
/>
</svg>
</a>
<a
href="https://x.com/angular"
aria-label="X"
target="_blank"
rel="noopener"
>
<svg
width="24"
height="24"
viewBox="0 0 24 24"
fill="none"
xmlns="http://www.w3.org/2000/svg"
alt="X"
>
<path
d="M18.244 2.25h3.308l-7.227 8.26 8.502 11.24H16.17l-5.214-6.817L4.99 21.75H1.68l7.73-8.835L1.254 2.25H8.08l4.713 6.231zm-1.161 17.52h1.833L7.084 4.126H5.117z"
/>
</svg>
</a>
<a
href="https://www.youtube.com/channel/UCbn1OgGei-DV7aSRo_HaAiw"
aria-label="Youtube"
target="_blank"
rel="noopener"
>
<svg
width="29"
height="20"
viewBox="0 0 29 20"
fill="none"
xmlns="http://www.w3.org/2000/svg"
alt="Youtube"
>
<path
fill-rule="evenodd"
clip-rule="evenodd"
d="M27.4896 1.52422C27.9301 1.96749 28.2463 2.51866 28.4068 3.12258C29.0004 5.35161 29.0004 10 29.0004 10C29.0004 10 29.0004 14.6484 28.4068 16.8774C28.2463 17.4813 27.9301 18.0325 27.4896 18.4758C27.0492 18.9191 26.5 19.2389 25.8972 19.4032C23.6778 20 14.8068 20 14.8068 20C14.8068 20 5.93586 20 3.71651 19.4032C3.11363 19.2389 2.56449 18.9191 2.12405 18.4758C1.68361 18.0325 1.36732 17.4813 1.20683 16.8774C0.613281 14.6484 0.613281 10 0.613281 10C0.613281 10 0.613281 5.35161 1.20683 3.12258C1.36732 2.51866 1.68361 1.96749 2.12405 1.52422C2.56449 1.08095 3.11363 0.76113 3.71651 0.596774C5.93586 0 14.8068 0 14.8068 0C14.8068 0 23.6778 0 25.8972 0.596774C26.5 0.76113 27.0492 1.08095 27.4896 1.52422ZM19.3229 10L11.9036 5.77905V14.221L19.3229 10Z"
/>
</svg>
</a>
</div>
</div>
</div>
</main>
<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
<!-- * * * * * * * * * * * The content above * * * * * * * * * * * * -->
<!-- * * * * * * * * * * is only a placeholder * * * * * * * * * * * -->
<!-- * * * * * * * * * * and can be replaced. * * * * * * * * * * * -->
<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
<!-- * * * * * * * * * * End of Placeholder * * * * * * * * * * * * -->
<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
<app-users-page />
src/app/app.spec.ts
+7 -16
View File
@@ -1,23 +1,14 @@
import { describe, expect, it, vi } from 'vitest';
import { TestBed } from '@angular/core/testing';
import { App } from './app';
describe('App', () => {
beforeEach(async () => {
await TestBed.configureTestingModule({
imports: [App],
}).compileComponents();
});
it('should create the app', () => {
it('renders the users page heading', async () => {
vi.stubGlobal('fetch', vi.fn().mockResolvedValue({ json: () => Promise.resolve([]) }));
await TestBed.configureTestingModule({ imports: [App] }).compileComponents();
const fixture = TestBed.createComponent(App);
const app = fixture.componentInstance;
expect(app).toBeTruthy();
});
it('should render title', async () => {
const fixture = TestBed.createComponent(App);
await fixture.whenStable();
const compiled = fixture.nativeElement as HTMLElement;
expect(compiled.querySelector('h1')?.textContent).toContain('Hello, ng-signals-template');
fixture.detectChanges();
expect(fixture.nativeElement.querySelector('h1')?.textContent).toBe('Users');
vi.unstubAllGlobals();
});
});
src/app/app.ts
+5 -6
View File
@@ -1,11 +1,10 @@
import { Component, signal } from '@angular/core';
import { Component } from '@angular/core';
import { UsersPage } from '@users/ui/users.page';
@Component({
selector: 'app-root',
imports: [],
imports: [UsersPage],
templateUrl: './app.html',
styleUrl: './app.css'
styleUrl: './app.css',
})
export class App {
protected readonly title = signal('ng-signals-template');
}
export class App {}
src/app/shared/application/remote-data.spec.ts
+46
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@@ -0,0 +1,46 @@
import { describe, expect, it } from 'vitest';
import type { Resource } from '@angular/core';
import { fromResource } from './remote-data';
interface FakeResourceOverrides<T> {
status?: () => string;
hasValue?: () => boolean;
value?: () => T;
error?: () => unknown;
}
function fakeResource<T>(overrides: FakeResourceOverrides<T>): Resource<T> {
return {
status: () => 'resolved',
hasValue: () => false,
value: () => undefined as T,
error: () => undefined,
...overrides,
} as unknown as Resource<T>;
}
describe('fromResource', () => {
it('is Loading while the resource has not resolved', () => {
const rd = fromResource(fakeResource<string[]>({ hasValue: () => false }));
expect(rd).toEqual({ tag: 'Loading' });
});
it('is Failure when the resource has errored', () => {
const error = new Error('boom');
const rd = fromResource(fakeResource<string[]>({ status: () => 'error', error: () => error }));
expect(rd).toEqual({ tag: 'Failure', error });
});
it('is Empty when the resolved value is considered empty', () => {
const rd = fromResource(
fakeResource<string[]>({ hasValue: () => true, value: () => [] }),
(v) => v.length === 0,
);
expect(rd).toEqual({ tag: 'Empty' });
});
it('is Success with the value when resolved and not empty', () => {
const rd = fromResource(fakeResource<string[]>({ hasValue: () => true, value: () => ['a'] }));
expect(rd).toEqual({ tag: 'Success', value: ['a'] });
});
});
src/app/shared/application/remote-data.ts
+24
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@@ -0,0 +1,24 @@
import type { Resource } from '@angular/core';
/**
* Four mutually exclusive async states — the data lives ON the state, so e.g.
* "success with no value" or "error with a stale value" is unrepresentable.
*/
export type RemoteData<E, T> =
| { tag: 'Loading' }
| { tag: 'Empty' }
| { tag: 'Failure'; error: E }
| { tag: 'Success'; value: T };
/** Project Angular's own resource() into a RemoteData value. */
export function fromResource<T>(
r: Resource<T>,
isEmpty: (v: T) => boolean = () => false,
): RemoteData<unknown, T> {
if (r.status() === 'error') return { tag: 'Failure', error: r.error() };
if (r.hasValue()) {
const v = r.value();
return isEmpty(v) ? { tag: 'Empty' } : { tag: 'Success', value: v };
}
return { tag: 'Loading' };
}
src/app/shared/ui/atoms/spinner.component.spec.ts
+13
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@@ -0,0 +1,13 @@
import { describe, expect, it } from 'vitest';
import { TestBed } from '@angular/core/testing';
import { SpinnerComponent } from './spinner.component';
describe('SpinnerComponent', () => {
it('renders a status role element', async () => {
await TestBed.configureTestingModule({ imports: [SpinnerComponent] }).compileComponents();
const fixture = TestBed.createComponent(SpinnerComponent);
fixture.detectChanges();
const el = fixture.nativeElement as HTMLElement;
expect(el.querySelector('[role="status"]')).toBeTruthy();
});
});
src/app/shared/ui/atoms/spinner.component.ts
+22
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@@ -0,0 +1,22 @@
import { Component } from '@angular/core';
@Component({
selector: 'app-spinner',
template: `<div class="spinner" role="status" aria-label="Loading"></div>`,
styles: `
.spinner {
width: 1.5rem;
height: 1.5rem;
border: 2px solid #ddd;
border-top-color: #333;
border-radius: 50%;
animation: spin 0.6s linear infinite;
}
@keyframes spin {
to {
transform: rotate(360deg);
}
}
`,
})
export class SpinnerComponent {}
src/app/shared/ui/molecules/async.component.spec.ts
+60
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@@ -0,0 +1,60 @@
import { describe, expect, it } from 'vitest';
import { Component } from '@angular/core';
import { TestBed } from '@angular/core/testing';
import { AsyncComponent } from './async.component';
import type { RemoteData } from '@shared/application/remote-data';
@Component({
imports: [AsyncComponent],
template: `
<app-async [data]="data" (retry)="retried = true">
<p class="content">loaded content</p>
</app-async>
`,
})
class HostComponent {
data: RemoteData<unknown, string> = { tag: 'Loading' };
retried = false;
}
function render(data: RemoteData<unknown, string>) {
const fixture = TestBed.createComponent(HostComponent);
fixture.componentInstance.data = data;
fixture.detectChanges();
return fixture;
}
describe('AsyncComponent', () => {
it('shows a spinner while loading', async () => {
await TestBed.configureTestingModule({ imports: [HostComponent] }).compileComponents();
const fixture = render({ tag: 'Loading' });
expect(fixture.nativeElement.querySelector('app-spinner')).toBeTruthy();
});
it('shows the empty text when empty', async () => {
await TestBed.configureTestingModule({ imports: [HostComponent] }).compileComponents();
const fixture = render({ tag: 'Empty' });
expect(fixture.nativeElement.textContent).toContain('No data.');
});
it('shows the error text on failure', async () => {
await TestBed.configureTestingModule({ imports: [HostComponent] }).compileComponents();
const fixture = render({ tag: 'Failure', error: new Error('boom') });
expect(fixture.nativeElement.querySelector('[role="alert"]')?.textContent).toContain(
'Something went wrong.',
);
});
it('emits retry when the retry button is clicked', async () => {
await TestBed.configureTestingModule({ imports: [HostComponent] }).compileComponents();
const fixture = render({ tag: 'Failure', error: new Error('boom') });
fixture.nativeElement.querySelector('button').click();
expect(fixture.componentInstance.retried).toBe(true);
});
it('projects success content when successful', async () => {
await TestBed.configureTestingModule({ imports: [HostComponent] }).compileComponents();
const fixture = render({ tag: 'Success', value: 'x' });
expect(fixture.nativeElement.querySelector('.content')).toBeTruthy();
});
});
src/app/shared/ui/molecules/async.component.ts
+32
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@@ -0,0 +1,32 @@
import { Component, input, output } from '@angular/core';
import { SpinnerComponent } from '@shared/ui/atoms/spinner.component';
import type { RemoteData } from '@shared/application/remote-data';
@Component({
selector: 'app-async',
imports: [SpinnerComponent],
template: `
@switch (data().tag) {
@case ('Loading') {
<app-spinner />
}
@case ('Empty') {
<p>{{ emptyText() }}</p>
}
@case ('Failure') {
<p role="alert">{{ errorText() }}</p>
<button type="button" (click)="retry.emit()">{{ retryText() }}</button>
}
@case ('Success') {
<ng-content />
}
}
`,
})
export class AsyncComponent<T> {
data = input.required<RemoteData<unknown, T>>();
emptyText = input('No data.');
errorText = input('Something went wrong.');
retryText = input('Retry');
retry = output<void>();
}
src/app/shared/ui/templates/page-shell.component.spec.ts
+13
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@@ -0,0 +1,13 @@
import { describe, expect, it } from 'vitest';
import { TestBed } from '@angular/core/testing';
import { PageShellComponent } from './page-shell.component';
describe('PageShellComponent', () => {
it('renders the heading', async () => {
await TestBed.configureTestingModule({ imports: [PageShellComponent] }).compileComponents();
const fixture = TestBed.createComponent(PageShellComponent);
fixture.componentRef.setInput('heading', 'Users');
fixture.detectChanges();
expect(fixture.nativeElement.querySelector('h1')?.textContent).toBe('Users');
});
});
src/app/shared/ui/templates/page-shell.component.ts
+12
View File
@@ -0,0 +1,12 @@
import { Component, input } from '@angular/core';
@Component({
selector: 'app-page-shell',
template: `
<h1>{{ heading() }}</h1>
<ng-content />
`,
})
export class PageShellComponent {
heading = input.required<string>();
}
src/app/users/application/user-detail.resource.ts
+5
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@@ -0,0 +1,5 @@
import { resource } from '@angular/core';
import { fetchUserById } from '@users/infrastructure/users.adapter';
export const userDetailResource = (userId: () => number) =>
resource({ params: userId, loader: ({ params }) => fetchUserById(params) });
src/app/users/application/users.resource.ts
+4
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@@ -0,0 +1,4 @@
import { resource } from '@angular/core';
import { fetchUsers } from '@users/infrastructure/users.adapter';
export const usersResource = () => resource({ loader: fetchUsers });
src/app/users/domain/user.spec.ts
+16
View File
@@ -0,0 +1,16 @@
import { describe, expect, it } from 'vitest';
import { isEmptyUserList } from './user';
describe('isEmptyUserList', () => {
it('is empty for an empty list', () => {
expect(isEmptyUserList([])).toBe(true);
});
it('is not empty when a user is present', () => {
expect(isEmptyUserList([{ id: 1, name: 'Ada' }])).toBe(false);
});
it('is empty when the list is undefined', () => {
expect(isEmptyUserList(undefined)).toBe(true);
});
});
src/app/users/domain/user.ts
+15
View File
@@ -0,0 +1,15 @@
export interface User {
id: number;
name: string;
}
export interface UserDetail extends User {
email: string;
}
/**
* Accepts `undefined` because a resource's value is `T | undefined` until it resolves
* (no `defaultValue` is set) — `fromResource` only calls this once `hasValue()` is true,
* but the type can't express that across the generic boundary.
*/
export const isEmptyUserList = (users: User[] | undefined): boolean => !users || users.length === 0;
src/app/users/infrastructure/users.adapter.ts
+7
View File
@@ -0,0 +1,7 @@
import type { User, UserDetail } from '@users/domain/user';
export const fetchUsers = (): Promise<User[]> =>
fetch('https://jsonplaceholder.typicode.com/users').then((r) => r.json());
export const fetchUserById = (id: number): Promise<UserDetail> =>
fetch(`https://jsonplaceholder.typicode.com/users/${id}`).then((r) => r.json());
src/app/users/ui/organisms/user-detail.component.spec.ts
+42
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@@ -0,0 +1,42 @@
import { afterEach, describe, expect, it, vi } from 'vitest';
import { TestBed } from '@angular/core/testing';
import { UserDetailComponent } from './user-detail.component';
afterEach(() => {
vi.unstubAllGlobals();
});
describe('UserDetailComponent', () => {
it("shows the fetched user's name and email once resolved", async () => {
vi.stubGlobal(
'fetch',
vi.fn().mockResolvedValue({
json: () => Promise.resolve({ id: 1, name: 'Ada', email: 'ada@example.com' }),
}),
);
await TestBed.configureTestingModule({ imports: [UserDetailComponent] }).compileComponents();
const fixture = TestBed.createComponent(UserDetailComponent);
fixture.componentRef.setInput('userId', 1);
fixture.detectChanges();
await fixture.whenStable();
fixture.detectChanges();
expect(fixture.nativeElement.textContent).toContain('ada@example.com');
});
it('emits close when the back button is clicked', async () => {
vi.stubGlobal(
'fetch',
vi.fn().mockResolvedValue({
json: () => Promise.resolve({ id: 1, name: 'Ada', email: 'a@x.com' }),
}),
);
await TestBed.configureTestingModule({ imports: [UserDetailComponent] }).compileComponents();
const fixture = TestBed.createComponent(UserDetailComponent);
fixture.componentRef.setInput('userId', 1);
fixture.detectChanges();
let closed = false;
fixture.componentInstance.close.subscribe(() => (closed = true));
fixture.nativeElement.querySelectorAll('button')[0].click();
expect(closed).toBe(true);
});
});
src/app/users/ui/organisms/user-detail.component.ts
+23
View File
@@ -0,0 +1,23 @@
import { Component, computed, input, output } from '@angular/core';
import { AsyncComponent } from '@shared/ui/molecules/async.component';
import { fromResource } from '@shared/application/remote-data';
import { userDetailResource } from '@users/application/user-detail.resource';
@Component({
selector: 'app-user-detail',
imports: [AsyncComponent],
template: `
<app-async [data]="data()" (retry)="detailResource.reload()">
@if (detailResource.value(); as u) {
<p>{{ u.name }} — {{ u.email }}</p>
}
</app-async>
<button type="button" (click)="close.emit()">Back</button>
`,
})
export class UserDetailComponent {
userId = input.required<number>();
close = output<void>();
protected detailResource = userDetailResource(() => this.userId());
protected data = computed(() => fromResource(this.detailResource));
}
src/app/users/ui/organisms/user-list.component.spec.ts
+27
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@@ -0,0 +1,27 @@
import { describe, expect, it } from 'vitest';
import { TestBed } from '@angular/core/testing';
import { UserListComponent } from './user-list.component';
describe('UserListComponent', () => {
it('renders one button per user', async () => {
await TestBed.configureTestingModule({ imports: [UserListComponent] }).compileComponents();
const fixture = TestBed.createComponent(UserListComponent);
fixture.componentRef.setInput('users', [
{ id: 1, name: 'Ada' },
{ id: 2, name: 'Grace' },
]);
fixture.detectChanges();
expect(fixture.nativeElement.querySelectorAll('button').length).toBe(2);
});
it("emits select with the clicked user's id", async () => {
await TestBed.configureTestingModule({ imports: [UserListComponent] }).compileComponents();
const fixture = TestBed.createComponent(UserListComponent);
fixture.componentRef.setInput('users', [{ id: 7, name: 'Ada' }]);
fixture.detectChanges();
let selected: number | undefined;
fixture.componentInstance.select.subscribe((id: number) => (selected = id));
fixture.nativeElement.querySelector('button').click();
expect(selected).toBe(7);
});
});
src/app/users/ui/organisms/user-list.component.ts
+19
View File
@@ -0,0 +1,19 @@
import { Component, input, output } from '@angular/core';
import type { User } from '@users/domain/user';
@Component({
selector: 'app-user-list',
template: `
<ul>
@for (u of users(); track u.id) {
<li>
<button type="button" (click)="select.emit(u.id)">{{ u.name }}</button>
</li>
}
</ul>
`,
})
export class UserListComponent {
users = input.required<User[]>();
select = output<number>();
}
src/app/users/ui/users.page.spec.ts
+66
View File
@@ -0,0 +1,66 @@
import { afterEach, describe, expect, it, vi } from 'vitest';
import { TestBed } from '@angular/core/testing';
import { UsersPage } from './users.page';
function stubFetch() {
vi.stubGlobal(
'fetch',
vi.fn((url: string) => {
if (url.endsWith('/users')) {
return Promise.resolve({ json: () => Promise.resolve([{ id: 1, name: 'Ada' }]) });
}
return Promise.resolve({
json: () => Promise.resolve({ id: 1, name: 'Ada', email: 'ada@example.com' }),
});
}),
);
}
afterEach(() => {
vi.unstubAllGlobals();
});
describe('UsersPage', () => {
it('renders the fetched users as a list', async () => {
stubFetch();
await TestBed.configureTestingModule({ imports: [UsersPage] }).compileComponents();
const fixture = TestBed.createComponent(UsersPage);
fixture.detectChanges();
await fixture.whenStable();
fixture.detectChanges();
expect(fixture.nativeElement.textContent).toContain('Ada');
});
it("shows a user's details after clicking their name", async () => {
stubFetch();
await TestBed.configureTestingModule({ imports: [UsersPage] }).compileComponents();
const fixture = TestBed.createComponent(UsersPage);
fixture.detectChanges();
await fixture.whenStable();
fixture.detectChanges();
fixture.nativeElement.querySelector('button').click();
fixture.detectChanges();
await fixture.whenStable();
fixture.detectChanges();
expect(fixture.nativeElement.textContent).toContain('ada@example.com');
});
it('returns to the list when the detail view is closed', async () => {
stubFetch();
await TestBed.configureTestingModule({ imports: [UsersPage] }).compileComponents();
const fixture = TestBed.createComponent(UsersPage);
fixture.detectChanges();
await fixture.whenStable();
fixture.detectChanges();
fixture.nativeElement.querySelector('button').click();
fixture.detectChanges();
await fixture.whenStable();
fixture.detectChanges();
const backButton = Array.from(fixture.nativeElement.querySelectorAll('button')).find(
(b) => (b as HTMLElement).textContent === 'Back',
) as HTMLElement;
backButton.click();
fixture.detectChanges();
expect(fixture.nativeElement.querySelector('app-user-detail')).toBeFalsy();
});
});
src/app/users/ui/users.page.ts
+31
View File
@@ -0,0 +1,31 @@
import { Component, computed, signal } from '@angular/core';
import { PageShellComponent } from '@shared/ui/templates/page-shell.component';
import { AsyncComponent } from '@shared/ui/molecules/async.component';
import { fromResource } from '@shared/application/remote-data';
import { UserListComponent } from '@users/ui/organisms/user-list.component';
import { UserDetailComponent } from '@users/ui/organisms/user-detail.component';
import { usersResource } from '@users/application/users.resource';
import { isEmptyUserList } from '@users/domain/user';
@Component({
selector: 'app-users-page',
imports: [PageShellComponent, AsyncComponent, UserListComponent, UserDetailComponent],
template: `
<app-page-shell heading="Users">
@if (selectedUserId(); as id) {
<app-user-detail [userId]="id" (close)="selectedUserId.set(null)" />
} @else {
<app-async [data]="listData()" (retry)="usersResource.reload()">
@if (usersResource.hasValue()) {
<app-user-list [users]="usersResource.value()!" (select)="selectedUserId.set($event)" />
}
</app-async>
}
</app-page-shell>
`,
})
export class UsersPage {
protected selectedUserId = signal<number | null>(null);
protected usersResource = usersResource();
protected listData = computed(() => fromResource(this.usersResource, isEmptyUserList));
}
src/main.ts
+1 -2
View File
@@ -2,5 +2,4 @@ import { bootstrapApplication } from '@angular/platform-browser';
import { appConfig } from './app/app.config';
import { App } from './app/app';
bootstrapApplication(App, appConfig)
.catch((err) => console.error(err));
bootstrapApplication(App, appConfig).catch((err) => console.error(err));