test: fix Modal.confirm test coverage to 100% (#41182)

* test: fix modal test cov

* test: fix modal test cov

* test: fix test case

components/modal/ConfirmDialog.tsx

@@ -106,9 +106,7 @@ export function ConfirmContent(
         )}
         <div className={`${confirmPrefixCls}-content`}>{props.content}</div>
       </div>
-      {footer !== undefined ? (
-        footer
-      ) : (
+      {footer === undefined ? (
         <div className={`${confirmPrefixCls}-btns`}>
           {cancelButton}
           <ActionButton
@@ -122,6 +120,8 @@ export function ConfirmContent(
             {okText || (mergedOkCancel ? mergedLocale?.okText : mergedLocale?.justOkText)}
           </ActionButton>
         </div>
+      ) : (
+        footer
       )}
     </div>
   );

components/modal/Modal.tsx

@@ -182,6 +182,7 @@ const Modal: React.FC<ModalProps> = (props) => {
     visible,
 
     width = 520,
+    footer,
     ...restProps
   } = props;
 
@@ -210,11 +211,7 @@ const Modal: React.FC<ModalProps> = (props) => {
           rootClassName={classNames(hashId, rootClassName)}
           wrapClassName={wrapClassNameExtended}
           footer={
-            props.footer === null ? (
-              props.footer
-            ) : (
-              <Footer {...props} onOk={handleOk} onCancel={handleCancel} />
-            )
+            footer === null ? footer : <Footer {...props} onOk={handleOk} onCancel={handleCancel} />
           }
           visible={open ?? visible}
           mousePosition={restProps.mousePosition ?? mousePosition}

components/modal/PurePanel.tsx

@@ -119,7 +119,7 @@ const PurePanel: React.FC<PurePanelProps> = (props) => {
     additionalProps = {
       closable: closable ?? true,
       title,
-      footer: props.footer === null ? props.footer : <Footer {...props} />,
+      footer: <Footer {...props} />,
       children,
     };
   }