fix(@schematics/angular): generate interceptors with a dash type separator

To align with the updated style guide, Angular v20 will generate interceptors
with file extension `interceptor` type prefixed with a `-` separator instead of
a `.` by default. Projects will automatically use this naming convention.
Projects can however opt-out by setting the `typeSeparator` option to `.`
for the interceptor schematic. This can be done as a default in the `angular.json`
or directly on the commandline via `--type-separator=.` when executing `ng generate`.
As an example, `example.interceptor.ts` will now be named `example-interceptor.ts`.
The TypeScript declaration will continue to contain `Interceptor` such as with `ExampleInterceptor`.

Author: clydin

Diff for: packages/schematics/angular/interceptor/class-files/__name@dasherize__.interceptor.spec.ts.template renamed to packages/schematics/angular/interceptor/class-files/__name@dasherize____typeSeparator__interceptor.spec.ts.template

@@ -1,6 +1,6 @@
 import { TestBed } from '@angular/core/testing';
 
-import { <%= classify(name) %>Interceptor } from './<%= dasherize(name) %>.interceptor';
+import { <%= classify(name) %>Interceptor } from './<%= dasherize(name) %><%= typeSeparator %>interceptor';
 
 describe('<%= classify(name) %>Interceptor', () => {
   beforeEach(() => TestBed.configureTestingModule({

Diff for: packages/schematics/angular/interceptor/class-files/__name@dasherize__.interceptor.ts.template renamed to packages/schematics/angular/interceptor/class-files/__name@dasherize____typeSeparator__interceptor.ts.template

@@ -1,7 +1,7 @@
 import { TestBed } from '@angular/core/testing';
 import { HttpInterceptorFn } from '@angular/common/http';
 
-import { <%= camelize(name) %>Interceptor } from './<%= dasherize(name) %>.interceptor';
+import { <%= camelize(name) %>Interceptor } from './<%= dasherize(name) %><%= typeSeparator %>interceptor';
 
 describe('<%= camelize(name) %>Interceptor', () => {
   const interceptor: HttpInterceptorFn = (req, next) => 

Diff for: packages/schematics/angular/interceptor/functional-files/__name@dasherize__.interceptor.spec.ts.template renamed to packages/schematics/angular/interceptor/functional-files/__name@dasherize____typeSeparator__interceptor.spec.ts.template

@@ -46,9 +46,31 @@ describe('Interceptor Schematic', () => {
 
     const tree = await schematicRunner.runSchematic('interceptor', options, appTree);
 
+    const files = tree.files;
+    expect(files).toContain('/projects/bar/src/app/foo/foo-interceptor.spec.ts');
+    expect(files).toContain('/projects/bar/src/app/foo/foo-interceptor.ts');
+  });
+
+  it('should use a `.` type separator when specified', async () => {
+    const options = { ...defaultOptions, typeSeparator: '.' };
+
+    const tree = await schematicRunner.runSchematic('interceptor', options, appTree);
     const files = tree.files;
     expect(files).toContain('/projects/bar/src/app/foo/foo.interceptor.spec.ts');
     expect(files).toContain('/projects/bar/src/app/foo/foo.interceptor.ts');
+    const specContent = tree.readContent('/projects/bar/src/app/foo/foo.interceptor.spec.ts');
+    expect(specContent).toContain(`'./foo.interceptor'`);
+  });
+
+  it('should use a `-` type separator when specified', async () => {
+    const options = { ...defaultOptions, typeSeparator: '-' };
+
+    const tree = await schematicRunner.runSchematic('interceptor', options, appTree);
+    const files = tree.files;
+    expect(files).toContain('/projects/bar/src/app/foo/foo-interceptor.spec.ts');
+    expect(files).toContain('/projects/bar/src/app/foo/foo-interceptor.ts');
+    const specContent = tree.readContent('/projects/bar/src/app/foo/foo-interceptor.spec.ts');
+    expect(specContent).toContain(`'./foo-interceptor'`);
   });
 
   it('should respect the skipTests flag', async () => {
@@ -57,8 +79,8 @@ describe('Interceptor Schematic', () => {
     const tree = await schematicRunner.runSchematic('interceptor', options, appTree);
 
     const files = tree.files;
-    expect(files).toContain('/projects/bar/src/app/foo/foo.interceptor.ts');
-    expect(files).not.toContain('/projects/bar/src/app/foo/foo.interceptor.spec.ts');
+    expect(files).toContain('/projects/bar/src/app/foo/foo-interceptor.ts');
+    expect(files).not.toContain('/projects/bar/src/app/foo/foo-interceptor.spec.ts');
   });
 
   it('should respect the sourceRoot value', async () => {
@@ -67,7 +89,7 @@ describe('Interceptor Schematic', () => {
     appTree.overwrite('/angular.json', JSON.stringify(config, null, 2));
     appTree = await schematicRunner.runSchematic('interceptor', defaultOptions, appTree);
 
-    expect(appTree.files).toContain('/projects/bar/custom/app/foo/foo.interceptor.ts');
+    expect(appTree.files).toContain('/projects/bar/custom/app/foo/foo-interceptor.ts');
   });
 
   it('should create a functional interceptor', async () => {
@@ -77,7 +99,7 @@ describe('Interceptor Schematic', () => {
       appTree,
     );
 
-    const fileString = tree.readContent('/projects/bar/src/app/foo/foo.interceptor.ts');
+    const fileString = tree.readContent('/projects/bar/src/app/foo/foo-interceptor.ts');
     expect(fileString).toContain(
       'export const fooInterceptor: HttpInterceptorFn = (req, next) => {',
     );
@@ -90,7 +112,7 @@ describe('Interceptor Schematic', () => {
       appTree,
     );
 
-    const fileString = tree.readContent('/projects/bar/src/app/foo/foo.interceptor.spec.ts');
+    const fileString = tree.readContent('/projects/bar/src/app/foo/foo-interceptor.spec.ts');
     expect(fileString).toContain('const interceptor: HttpInterceptorFn = (req, next) => ');
     expect(fileString).toContain('TestBed.runInInjectionContext(() => fooInterceptor(req, next));');
   });

Diff for: packages/schematics/angular/interceptor/functional-files/__name@dasherize__.interceptor.ts.template renamed to packages/schematics/angular/interceptor/functional-files/__name@dasherize____typeSeparator__interceptor.ts.template

@@ -45,6 +45,12 @@
       "type": "boolean",
       "description": "Creates the interceptor as a function `HttpInterceptorFn` instead of a class. Functional interceptors can be simpler for basic scenarios.",
       "default": true
+    },
+    "typeSeparator": {
+      "type": "string",
+      "default": "-",
+      "enum": ["-", "."],
+      "description": "The separator character to use before the type within the generated file's name. For example, if you set the option to `.`, the file will be named `example.interceptor.ts`."
     }
   },
   "required": ["name", "project"]

Diff for: packages/schematics/angular/interceptor/index_spec.ts

@@ -7,10 +7,10 @@ export default function () {
   const interceptorDir = join('src', 'app');
 
   return (
-    ng('generate', 'interceptor', 'test-interceptor')
+    ng('generate', 'interceptor', 'test')
       .then(() => expectFileToExist(interceptorDir))
-      .then(() => expectFileToExist(join(interceptorDir, 'test-interceptor.interceptor.ts')))
-      .then(() => expectFileToExist(join(interceptorDir, 'test-interceptor.interceptor.spec.ts')))
+      .then(() => expectFileToExist(join(interceptorDir, 'test-interceptor.ts')))
+      .then(() => expectFileToExist(join(interceptorDir, 'test-interceptor.spec.ts')))
 
       // Try to run the unit tests.
       .then(() => ng('test', '--watch=false'))