fix(module:statistic): remove top-level redundant div element (#7659)

Author: HyperLife1119

components/statistic/statistic.component.ts

@@ -28,21 +28,23 @@ import { NzStatisticValueType } from './typings';
   selector: 'nz-statistic',
   exportAs: 'nzStatistic',
   template: `
-    <div class="ant-statistic" [class.ant-statistic-rtl]="dir === 'rtl'">
-      <div class="ant-statistic-title">
-        <ng-container *nzStringTemplateOutlet="nzTitle">{{ nzTitle }}</ng-container>
-      </div>
-      <div class="ant-statistic-content" [ngStyle]="nzValueStyle">
-        <span *ngIf="nzPrefix" class="ant-statistic-content-prefix">
-          <ng-container *nzStringTemplateOutlet="nzPrefix">{{ nzPrefix }}</ng-container>
-        </span>
-        <nz-statistic-number [nzValue]="nzValue" [nzValueTemplate]="nzValueTemplate"></nz-statistic-number>
-        <span *ngIf="nzSuffix" class="ant-statistic-content-suffix">
-          <ng-container *nzStringTemplateOutlet="nzSuffix">{{ nzSuffix }}</ng-container>
-        </span>
-      </div>
+    <div class="ant-statistic-title">
+      <ng-container *nzStringTemplateOutlet="nzTitle">{{ nzTitle }}</ng-container>
     </div>
-  `
+    <div class="ant-statistic-content" [ngStyle]="nzValueStyle">
+      <span *ngIf="nzPrefix" class="ant-statistic-content-prefix">
+        <ng-container *nzStringTemplateOutlet="nzPrefix">{{ nzPrefix }}</ng-container>
+      </span>
+      <nz-statistic-number [nzValue]="nzValue" [nzValueTemplate]="nzValueTemplate"></nz-statistic-number>
+      <span *ngIf="nzSuffix" class="ant-statistic-content-suffix">
+        <ng-container *nzStringTemplateOutlet="nzSuffix">{{ nzSuffix }}</ng-container>
+      </span>
+    </div>
+  `,
+  host: {
+    class: 'ant-statistic',
+    '[class.ant-statistic-rtl]': `dir === 'rtl'`
+  }
 })
 export class NzStatisticComponent implements OnDestroy, OnInit {
   @Input() nzPrefix?: string | TemplateRef<void>;

components/statistic/statistic.spec.ts

@@ -51,11 +51,11 @@ describe('nz-statistic', () => {
 
     it('should className correct on dir change', () => {
       fixture.detectChanges();
-      expect(statisticEl.nativeElement.querySelector('.ant-statistic').classList).toContain('ant-statistic-rtl');
+      expect(statisticEl.nativeElement.classList).toContain('ant-statistic-rtl');
 
       fixture.componentInstance.direction = 'ltr';
       fixture.detectChanges();
-      expect(statisticEl.nativeElement.querySelector('.ant-statistic').classList).not.toContain('ant-statistic-rtl');
+      expect(statisticEl.nativeElement.classList).not.toContain('ant-statistic-rtl');
     });
   });
 });