angular-docs-cn/modules/@angular/compiler/test/directive_lifecycle_spec.ts

import {
  beforeEach,
  xdescribe,
  ddescribe,
  describe,
  expect,
  iit,
  inject,
  it,
} from '@angular/core/testing/testing_internal';

import {hasLifecycleHook} from '@angular/compiler/src/directive_lifecycle_reflector';
import {LifecycleHooks} from '@angular/core/src/metadata/lifecycle_hooks';

export function main() {
  describe('Create DirectiveMetadata', () => {
    describe('lifecycle', () => {

      describe("ngOnChanges", () => {
        it("should be true when the directive has the ngOnChanges method", () => {
          expect(hasLifecycleHook(LifecycleHooks.OnChanges, DirectiveWithOnChangesMethod))
              .toBe(true);
        });

        it("should be false otherwise", () => {
          expect(hasLifecycleHook(LifecycleHooks.OnChanges, DirectiveNoHooks)).toBe(false);
        });
      });

      describe("ngOnDestroy", () => {
        it("should be true when the directive has the ngOnDestroy method", () => {
          expect(hasLifecycleHook(LifecycleHooks.OnDestroy, DirectiveWithOnDestroyMethod))
              .toBe(true);
        });

        it("should be false otherwise", () => {
          expect(hasLifecycleHook(LifecycleHooks.OnDestroy, DirectiveNoHooks)).toBe(false);
        });
      });

      describe("ngOnInit", () => {
        it("should be true when the directive has the ngOnInit method", () => {
          expect(hasLifecycleHook(LifecycleHooks.OnInit, DirectiveWithOnInitMethod)).toBe(true);
        });

        it("should be false otherwise", () => {
          expect(hasLifecycleHook(LifecycleHooks.OnInit, DirectiveNoHooks)).toBe(false);
        });
      });

      describe("ngDoCheck", () => {
        it("should be true when the directive has the ngDoCheck method", () => {
          expect(hasLifecycleHook(LifecycleHooks.DoCheck, DirectiveWithOnCheckMethod)).toBe(true);
        });

        it("should be false otherwise", () => {
          expect(hasLifecycleHook(LifecycleHooks.DoCheck, DirectiveNoHooks)).toBe(false);
        });
      });

      describe("ngAfterContentInit", () => {
        it("should be true when the directive has the ngAfterContentInit method", () => {
          expect(hasLifecycleHook(LifecycleHooks.AfterContentInit,
                                  DirectiveWithAfterContentInitMethod))
              .toBe(true);
        });

        it("should be false otherwise", () => {
          expect(hasLifecycleHook(LifecycleHooks.AfterContentInit, DirectiveNoHooks)).toBe(false);
        });
      });

      describe("ngAfterContentChecked", () => {
        it("should be true when the directive has the ngAfterContentChecked method", () => {
          expect(hasLifecycleHook(LifecycleHooks.AfterContentChecked,
                                  DirectiveWithAfterContentCheckedMethod))
              .toBe(true);
        });

        it("should be false otherwise", () => {
          expect(hasLifecycleHook(LifecycleHooks.AfterContentChecked, DirectiveNoHooks))
              .toBe(false);
        });
      });


      describe("ngAfterViewInit", () => {
        it("should be true when the directive has the ngAfterViewInit method", () => {
          expect(hasLifecycleHook(LifecycleHooks.AfterViewInit, DirectiveWithAfterViewInitMethod))
              .toBe(true);
        });

        it("should be false otherwise", () => {
          expect(hasLifecycleHook(LifecycleHooks.AfterViewInit, DirectiveNoHooks)).toBe(false);
        });
      });

      describe("ngAfterViewChecked", () => {
        it("should be true when the directive has the ngAfterViewChecked method", () => {
          expect(hasLifecycleHook(LifecycleHooks.AfterViewChecked,
                                  DirectiveWithAfterViewCheckedMethod))
              .toBe(true);
        });

        it("should be false otherwise", () => {
          expect(hasLifecycleHook(LifecycleHooks.AfterViewChecked, DirectiveNoHooks)).toBe(false);
        });
      });
    });
  });
}

class DirectiveNoHooks {}

class DirectiveWithOnChangesMethod {
  ngOnChanges(_: any /** TODO #9100 */) {}
}

class DirectiveWithOnInitMethod {
  ngOnInit() {}
}

class DirectiveWithOnCheckMethod {
  ngDoCheck() {}
}

class DirectiveWithOnDestroyMethod {
  ngOnDestroy() {}
}

class DirectiveWithAfterContentInitMethod {
  ngAfterContentInit() {}
}

class DirectiveWithAfterContentCheckedMethod {
  ngAfterContentChecked() {}
}

class DirectiveWithAfterViewInitMethod {
  ngAfterViewInit() {}
}

class DirectiveWithAfterViewCheckedMethod {
  ngAfterViewChecked() {}
}