fix(module:table): fix row spaces (#2061)

close #2059

Author: cipchk

Diff for: components/table/nz-td.component.html

@@ -1,4 +1,4 @@
-<span class="ant-table-row-indent" *ngIf="nzIndentSize" [style.padding-left.px]="nzIndentSize"></span>
+<span class="ant-table-row-indent" *ngIf="nzIndentSize >= 0" [style.padding-left.px]="nzIndentSize"></span>
 <label
   *ngIf="nzShowCheckbox"
   nz-checkbox
@@ -7,6 +7,9 @@
   [nzIndeterminate]="nzIndeterminate"
   (ngModelChange)="nzCheckedChange.emit($event)">
 </label>
+<span
+  *ngIf="!nzShowExpand && nzIndentSize != null"
+  class="ant-table-row-expand-icon ant-table-row-spaced"></span>
 <span
   *ngIf="nzShowExpand"
   class="ant-table-row-expand-icon"

Diff for: components/table/nz-td.spec.ts

@@ -100,6 +100,17 @@ describe('nz-td', () => {
       expect(td.nativeElement.querySelector('.ant-table-row-expand-icon').classList).toContain('ant-table-row-expanded');
       expect(testComponent.expandChange).toHaveBeenCalledTimes(1);
     });
+    it('should be row index when index-size is 0', () => {
+      testComponent.indentSize = 0;
+      fixture.detectChanges();
+      expect(td.nativeElement.querySelector('.ant-table-row-indent')).not.toBeNull();
+    });
+    it('should be keeping space when hidden expand and index-size is not null', () => {
+      testComponent.showExpand = false;
+      testComponent.indentSize = 0;
+      fixture.detectChanges();
+      expect(td.nativeElement.querySelector('.ant-table-row-expand-icon').classList).toContain('ant-table-row-spaced');
+    });
     it('should indentSize work', () => {
       fixture.detectChanges();
       expect(td.nativeElement.querySelector('.ant-table-row-indent')).toBeNull();