test(common): prefer TestBed.inject over inject (#37459)

Use the strongly typed TestBed.inject rather than the weakly typed inject test utility function. Reuse injected dependency variables between sibling test cases.

PR Close #37459

packages/common/test/location/location_spec.ts

@@ -8,7 +8,7 @@
 
 import {CommonModule, Location, LocationStrategy, PathLocationStrategy, PlatformLocation} from '@angular/common';
 import {MockLocationStrategy, MockPlatformLocation} from '@angular/common/testing';
-import {inject, TestBed} from '@angular/core/testing';
+import {TestBed} from '@angular/core/testing';
 
 const baseUrl = '/base';
 
@@ -41,6 +41,8 @@ describe('Location Class', () => {
   });
 
   describe('location.getState()', () => {
+    let location: Location;
+
     beforeEach(() => {
       TestBed.configureTestingModule({
         imports: [CommonModule],
@@ -55,31 +57,36 @@ describe('Location Class', () => {
           {provide: Location, useClass: Location, deps: [LocationStrategy, PlatformLocation]},
         ]
       });
+
+      location = TestBed.inject(Location);
     });
 
-    it('should get the state object', inject([Location], (location: Location) => {
-         expect(location.getState()).toBe(null);
+    it('should get the state object', () => {
+      expect(location.getState()).toBe(null);
 
-         location.go('/test', '', {foo: 'bar'});
+      location.go('/test', '', {foo: 'bar'});
 
-         expect(location.getState()).toEqual({foo: 'bar'});
-       }));
+      expect(location.getState()).toEqual({foo: 'bar'});
+    });
 
-    it('should work after using back button', inject([Location], (location: Location) => {
-         expect(location.getState()).toBe(null);
+    it('should work after using back button', () => {
+      expect(location.getState()).toBe(null);
 
-         location.go('/test1', '', {url: 'test1'});
-         location.go('/test2', '', {url: 'test2'});
+      location.go('/test1', '', {url: 'test1'});
+      location.go('/test2', '', {url: 'test2'});
 
-         expect(location.getState()).toEqual({url: 'test2'});
+      expect(location.getState()).toEqual({url: 'test2'});
 
-         location.back();
+      location.back();
 
-         expect(location.getState()).toEqual({url: 'test1'});
-       }));
+      expect(location.getState()).toEqual({url: 'test1'});
+    });
   });
 
   describe('location.onUrlChange()', () => {
+    let location: Location;
+    let locationStrategy: MockLocationStrategy;
+
     beforeEach(() => {
       TestBed.configureTestingModule({
         imports: [CommonModule],
@@ -94,29 +101,29 @@ describe('Location Class', () => {
           {provide: Location, useClass: Location, deps: [LocationStrategy, PlatformLocation]},
         ]
       });
+
+      location = TestBed.inject(Location);
+      locationStrategy = TestBed.inject(LocationStrategy) as MockLocationStrategy;
     });
 
-    it('should have onUrlChange method', inject([Location], (location: Location) => {
-         expect(typeof location.onUrlChange).toBe('function');
-       }));
+    it('should have onUrlChange method', () => {
+      expect(typeof location.onUrlChange).toBe('function');
+    });
 
-    it('should add registered functions to urlChangeListeners',
-       inject([Location], (location: Location) => {
-         function changeListener(url: string, state: unknown) {
-           return undefined;
-         }
+    it('should add registered functions to urlChangeListeners', () => {
+      function changeListener(url: string, state: unknown) {
+        return undefined;
+      }
 
-         expect((location as any)._urlChangeListeners.length).toBe(0);
+      expect((location as any)._urlChangeListeners.length).toBe(0);
 
-         location.onUrlChange(changeListener);
+      location.onUrlChange(changeListener);
 
-         expect((location as any)._urlChangeListeners.length).toBe(1);
-         expect((location as any)._urlChangeListeners[0]).toEqual(changeListener);
-       }));
+      expect((location as any)._urlChangeListeners.length).toBe(1);
+      expect((location as any)._urlChangeListeners[0]).toEqual(changeListener);
+    });
 
     it('should only notify listeners once when multiple listeners are registered', () => {
-      const location = TestBed.inject(Location);
-      const locationStrategy = TestBed.inject(LocationStrategy) as MockLocationStrategy;
       let notificationCount = 0;
 
       function incrementChangeListener(url: string, state: unknown) {