Refactor logic to prevent breaking changes in useToastState

packages/@react-spectrum/toast/src/toastContainer.css

@@ -29,14 +29,14 @@
 
   &[data-position=top] {
     top: 0;
-    flex-direction: column;
+    flex-direction: column-reverse;
     --slide-from: translateY(-100%);
     --slide-to: translateY(0);
   }
 
   &[data-position=bottom] {
     bottom: 0;
-    flex-direction: column-reverse;
+    flex-direction: column;
     --slide-from: translateY(100%);
     --slide-to: translateY(0);
   }

packages/@react-stately/toast/src/useToastState.ts

@@ -134,19 +134,15 @@ export class ToastQueue<T> {
       }
     }
 
-    if (toast.priority) {
-      this.queue.splice(low, 0, toast);
-    } else {
-      this.queue.unshift(toast);
-    }
+    this.queue.splice(low, 0, toast);
 
     toast.animation = low < this.maxVisibleToasts ? 'entering' : 'queued';
     let i = this.maxVisibleToasts;
     while (i < this.queue.length) {
       this.queue[i++].animation = 'queued';
     }
 
-    this.updateVisibleToasts();
+    this.updateVisibleToasts('add');
     return toastKey;
   }
 
@@ -159,30 +155,27 @@ export class ToastQueue<T> {
     if (index >= 0) {
       this.queue[index].onClose?.();
       this.queue.splice(index, 1);
+      let closedToast = this.visibleToasts.find(t => t.key === key);
+      if (closedToast) {
+        closedToast.animation = 'exiting';
+      }
     }
 
-    this.updateVisibleToasts(index);
+    this.updateVisibleToasts('close');
   }
 
   /** Removes a toast from the visible toasts after an exiting animation. */
   remove(key: string) {
-    let index = this.queue.findIndex(t => t.key === key);
-    this.visibleToasts = this.visibleToasts.filter(t => t.key !== key);
-    this.updateVisibleToasts(index);
+    this.queue = this.queue.filter(t => t.key !== key);
+    this.updateVisibleToasts('remove');
   }
 
-  private updateVisibleToasts(oldIndex = -1) {
+  private updateVisibleToasts(action: 'add' | 'close' | 'remove') {
     let toasts = this.queue.slice(0, this.maxVisibleToasts);
-    if (this.hasExitAnimation) {
-      let prevToasts: QueuedToast<T>[] = this.visibleToasts
-          .filter(t => !toasts.some(t2 => t.key === t2.key))
-          .map(t => ({...t, animation: 'exiting'}));
 
-      if (oldIndex !== -1) {
-        toasts.splice(oldIndex, 0, prevToasts?.[0]);
-      }
-
-      this.visibleToasts = toasts;
+    if (action === 'close' && this.hasExitAnimation) {
+      // Cause a rerender to happen for exit animation
+      this.visibleToasts = this.visibleToasts.map(t => t);
     } else {
       this.visibleToasts = toasts;
     }

packages/@react-stately/toast/test/useToastState.test.js

@@ -19,6 +19,14 @@ describe('useToastState', () => {
     props: {timeout: 0}
   }];
 
+  beforeEach(() => {
+    jest.useFakeTimers();
+  });
+
+  afterEach(() => {
+    act(() => jest.runAllTimers());
+  });
+
   it('should add a new toast via add', () => {
     let {result} = renderHook(() => useToastState());
     expect(result.current.visibleToasts).toStrictEqual([]);
@@ -58,8 +66,127 @@ describe('useToastState', () => {
 
     act(() => {result.current.add(secondToast.content, secondToast.props);});
     expect(result.current.visibleToasts.length).toBe(2);
-    expect(result.current.visibleToasts[0].content).toBe(secondToast.content);
-    expect(result.current.visibleToasts[1].content).toBe(newValue[0].content);
+    expect(result.current.visibleToasts[0].content).toBe(newValue[0].content);
+    expect(result.current.visibleToasts[1].content).toBe(secondToast.content);
+  });
+
+  it('should be able to display three toasts and remove the middle toast via timeout then the visible toast', () => {
+    let {result} = renderHook(() => useToastState({maxVisibleToasts: 3}));
+
+    // Add the first toast
+    act(() => {
+      result.current.add('First Toast', {timeout: 0});
+    });
+    expect(result.current.visibleToasts).toHaveLength(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    // Add the second toast
+    act(() => {
+      result.current.add('Second Toast', {timeout: 1000});
+    });
+    expect(result.current.visibleToasts).toHaveLength(2);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    result.current.resumeAll();
+
+    // Add the third toast
+    act(() => {
+      result.current.add('Third Toast', {timeout: 0});
+    });
+    expect(result.current.visibleToasts).toHaveLength(3);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+    expect(result.current.visibleToasts[1].content).toBe('Second Toast');
+    expect(result.current.visibleToasts[2].content).toBe('Third Toast');
+
+    act(() => jest.advanceTimersByTime(500));
+    expect(result.current.visibleToasts).toHaveLength(3);
+
+    act(() => jest.advanceTimersByTime(1000));
+    expect(result.current.visibleToasts).toHaveLength(2);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+    expect(result.current.visibleToasts[1].content).toBe('Third Toast');
+
+    act(() => {result.current.close(result.current.visibleToasts[0].key);});
+    expect(result.current.visibleToasts.length).toBe(1);
+    expect(result.current.visibleToasts[0].content).toBe('Third Toast');
+  });
+
+  it('should be able to display one toast without exitAnimation, add multiple toasts, and remove the middle not visible one programmatically', () => {
+    let {result} = renderHook(() => useToastState());
+
+    // Add the first toast
+    act(() => {
+      result.current.add('First Toast', {timeout: 0});
+    });
+    expect(result.current.visibleToasts).toHaveLength(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    let secondToastKey = null;
+    // Add the second toast
+    act(() => {
+      secondToastKey = result.current.add('Second Toast', {timeout: 0});
+    });
+    expect(result.current.visibleToasts).toHaveLength(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    // Add the third toast
+    act(() => {
+      result.current.add('Third Toast', {timeout: 0});
+    });
+    expect(result.current.visibleToasts).toHaveLength(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    // Remove a toast that isn't visible
+    act(() => {result.current.close(secondToastKey);});
+    expect(result.current.visibleToasts).toHaveLength(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    // Remove the visible toast to confirm the middle toast was removed
+    act(() => {result.current.close(result.current.visibleToasts[0].key);});
+    expect(result.current.visibleToasts.length).toBe(1);
+    expect(result.current.visibleToasts[0].content).toBe('Third Toast');
+  });
+
+  it('should be able to display one toast with exitAnimation, add multiple toasts, and remove the middle not visible one programmatically', () => {
+    let {result} = renderHook(() => useToastState({hasExitAnimation: true}));
+
+    // Add the first toast
+    act(() => {
+      result.current.add('First Toast', {timeout: 0});
+    });
+    expect(result.current.visibleToasts).toHaveLength(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    let secondToastKey = null;
+    // Add the second toast
+    act(() => {
+      secondToastKey = result.current.add('Second Toast', {timeout: 0});
+    });
+    expect(result.current.visibleToasts).toHaveLength(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    // Add the third toast
+    act(() => {
+      result.current.add('Third Toast', {timeout: 0});
+    });
+    expect(result.current.visibleToasts).toHaveLength(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    // Remove a toast that isn't visible
+    act(() => {result.current.close(secondToastKey);});
+    expect(result.current.visibleToasts).toHaveLength(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+
+    // Remove the visible toast to confirm the middle toast was removed
+    act(() => {result.current.close(result.current.visibleToasts[0].key);});
+    expect(result.current.visibleToasts.length).toBe(1);
+    expect(result.current.visibleToasts[0].content).toBe('First Toast');
+    expect(result.current.visibleToasts[0].animation).toBe('exiting');
+    act(() => {result.current.remove(result.current.visibleToasts[0].key);});
+
+    // there should only be one Toast left, the third one
+    expect(result.current.visibleToasts.length).toBe(1);
+    expect(result.current.visibleToasts[0].content).toBe('Third Toast');
   });
 
   it('should close a toast', () => {
@@ -91,11 +218,11 @@ describe('useToastState', () => {
 
     act(() => {result.current.add('Second Toast');});
     expect(result.current.visibleToasts.length).toBe(1);
-    expect(result.current.visibleToasts[0].content).toBe('Second Toast');
+    expect(result.current.visibleToasts[0].content).toBe(newValue[0].content);
 
     act(() => {result.current.close(result.current.visibleToasts[0].key);});
     expect(result.current.visibleToasts.length).toBe(1);
-    expect(result.current.visibleToasts[0].content).toBe(newValue[0].content);
+    expect(result.current.visibleToasts[0].content).toBe('Second Toast');
     expect(result.current.visibleToasts[0].animation).toBe('queued');
   });