docs: add schematics guide (#28343)

PR Close #28343

aio/content/examples/schematics-for-libraries/projects/my-lib/src/lib/my-lib.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { MyLibComponent } from './my-lib.component';
+
+describe('MyLibComponent', () => {
+  let component: MyLibComponent;
+  let fixture: ComponentFixture<MyLibComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ MyLibComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(MyLibComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

aio/content/examples/schematics-for-libraries/projects/my-lib/src/lib/my-lib.component.ts

@@ -0,0 +1,19 @@
+import { Component, OnInit } from '@angular/core';
+
+@Component({
+  selector: 'lib-my-lib',
+  template: `
+    <p>
+      my-lib works!
+    </p>
+  `,
+  styles: []
+})
+export class MyLibComponent implements OnInit {
+
+  constructor() { }
+
+  ngOnInit() {
+  }
+
+}

aio/content/examples/schematics-for-libraries/projects/my-lib/src/lib/my-lib.module.ts

@@ -0,0 +1,10 @@
+import { NgModule } from '@angular/core';
+import { MyLibComponent } from './my-lib.component';
+
+@NgModule({
+  declarations: [MyLibComponent],
+  imports: [
+  ],
+  exports: [MyLibComponent]
+})
+export class MyLibModule { }

aio/content/examples/schematics-for-libraries/projects/my-lib/src/lib/my-lib.service.spec.ts

@@ -0,0 +1,12 @@
+import { TestBed } from '@angular/core/testing';
+
+import { MyLibService } from './my-lib.service';
+
+describe('MyLibService', () => {
+  beforeEach(() => TestBed.configureTestingModule({}));
+
+  it('should be created', () => {
+    const service: MyLibService = TestBed.get(MyLibService);
+    expect(service).toBeTruthy();
+  });
+});

aio/content/examples/schematics-for-libraries/projects/my-lib/src/lib/my-lib.service.ts

@@ -0,0 +1,9 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class MyLibService {
+
+  constructor() { }
+}

aio/content/examples/schematics-for-libraries/projects/my-lib/src/public_api.ts

@@ -0,0 +1,7 @@
+/*
+ * Public API Surface of my-lib
+ */
+
+export * from './lib/my-lib.service';
+export * from './lib/my-lib.component';
+export * from './lib/my-lib.module';