[material-ui][Pagination] Add tests for zero boundary and sibling counts

packages/mui-material/src/Pagination/Pagination.test.js

@@ -278,4 +278,14 @@ describe('<Pagination />', () => {
 
     expect(resultsRef.current).toHaveFocus();
   });
+
+  it('renders no page button when count is zero', () => {
+    render(<Pagination count={0} boundaryCount={0} siblingCount={0} />);
+
+    const buttons = screen.getAllByRole('button');
+    expect(buttons).to.have.length(2);
+    buttons.forEach((button) => {
+      expect(button).to.have.attribute('disabled');
+    });
+  });
 });

packages/mui-material/src/usePagination/usePagination.test.js

@@ -178,4 +178,52 @@ describe('usePagination', () => {
       'next',
     ]);
   });
+
+  it('should never render a page item outside of the count range', () => {
+    [0, 1, 2, 3, 4, 5, 11].forEach((count) => {
+      [1, 3, 7].forEach((page) => {
+        const items = renderHook(() =>
+          usePagination({ count, page, boundaryCount: 0, siblingCount: 0 }),
+        ).result.current.items;
+        serialize(items)
+          .filter((item) => typeof item === 'number')
+          .forEach((item) => {
+            expect(item).to.be.within(1, count);
+          });
+      });
+    });
+  });
+
+  it('should keep every page reachable when they all fit', () => {
+    let items;
+
+    items = renderHook(() =>
+      usePagination({ count: 2, page: 1, boundaryCount: 0, siblingCount: 0 }),
+    ).result.current.items;
+    expect(serialize(items)).to.deep.equal(['previous', 1, 2, 'next']);
+
+    items = renderHook(() =>
+      usePagination({ count: 3, page: 2, boundaryCount: 0, siblingCount: 0 }),
+    ).result.current.items;
+    expect(serialize(items)).to.deep.equal(['previous', 1, 2, 3, 'next']);
+
+    items = renderHook(() =>
+      usePagination({ count: 4, page: 1, boundaryCount: 0, siblingCount: 0 }),
+    ).result.current.items;
+    expect(serialize(items)).to.deep.equal(['previous', 1, 2, 'end-ellipsis', 'next']);
+  });
+
+  it('should stay navigable without previous & next buttons', () => {
+    const items = renderHook(() =>
+      usePagination({
+        count: 3,
+        page: 2,
+        boundaryCount: 0,
+        siblingCount: 0,
+        hidePrevButton: true,
+        hideNextButton: true,
+      }),
+    ).result.current.items;
+    expect(serialize(items)).to.deep.equal([1, 2, 3]);
+  });
 });