feat(pagination): add pagination bar component

commitlint.config.js

@@ -13,7 +13,7 @@ module.exports = {
 };
 
 // Extra scopes supported outside the `modules` folder
-const scopes = ['labs'];
+const scopes = ['labs', 'pagination'];
 
 /**
  * @param {{ cwd: string}} context

cypress/integration/Pagination.spec.ts

@@ -0,0 +1,239 @@
+import * as h from '../helpers';
+
+describe('Button', () => {
+  before(() => {
+    h.stories.visit();
+  });
+
+  context('given Default pagination story is rendered', () => {
+    context('when screen width is larger than 500', () => {
+      beforeEach(() => {
+        h.stories.load('Labs/Pagination', 'Default');
+      });
+
+      it('should not have any axe errors', () => {
+        cy.checkA11y();
+      });
+
+      context('when the first page is selected', () => {
+        it('should have first page button with an aria label of "Selected, Page 1"', () => {
+          cy.contains('button', '1').should('have.attr', 'aria-label', 'Selected, Page 1');
+        });
+
+        it('should disable previous page button', () => {
+          cy.findByLabelText('Previous Page').should('be.disabled');
+        });
+
+        it('should not disable next page button', () => {
+          cy.findByLabelText('Next Page').should('not.be.disabled');
+        });
+
+        it('should show 5 page buttons', () => {
+          cy.findAllByLabelText(/Page \d$/).should('have.length', 5);
+        });
+
+        it('should label all page buttons', () => {
+          cy.contains('button', '2').should('have.attr', 'aria-label', 'Page 2');
+          cy.contains('button', '3').should('have.attr', 'aria-label', 'Page 3');
+          cy.contains('button', '4').should('have.attr', 'aria-label', 'Page 4');
+          cy.contains('button', '5').should('have.attr', 'aria-label', 'Page 5');
+        });
+
+        it('should reflect the current page number', () => {
+          cy.findByTestId('pageNumber').should('have.text', '1');
+        });
+      });
+
+      context('when the second page is clicked', () => {
+        beforeEach(() => {
+          cy.findByLabelText('Page 2').click();
+        });
+
+        it('should active page 2', () => {
+          cy.contains('button', '2').should('have.attr', 'aria-label', 'Selected, Page 2');
+        });
+
+        it('should keep focus on page 2', () => {
+          cy.contains('button', '2').should('have.focus');
+        });
+
+        it('should not disable previous page button', () => {
+          cy.findByLabelText('Previous Page').should('not.be.disabled');
+        });
+
+        it('should not disable next page button', () => {
+          cy.findByLabelText('Next Page').should('not.be.disabled');
+        });
+
+        it('should reflect the current page number', () => {
+          cy.findByTestId('pageNumber').should('have.text', '2');
+        });
+      });
+
+      context('when there are 10 pages (for page number distribution)', () => {
+        beforeEach(() => {
+          cy.changeKnob('total', 100);
+        });
+
+        it('should show 6 numbers', () => {
+          cy.findAllByLabelText(/Page \d+$/).should('have.length', 6);
+        });
+
+        context('when page 1 is selected', () => {
+          it('should show pages 1 through 5 and page 10', () => {
+            cy.findByLabelText(/Page 1$/).should('exist');
+            cy.findByLabelText(/Page 2$/).should('exist');
+            cy.findByLabelText(/Page 3$/).should('exist');
+            cy.findByLabelText(/Page 4$/).should('exist');
+            cy.findByLabelText(/Page 5$/).should('exist');
+            cy.findByLabelText(/Page 10$/).should('exist');
+          });
+        });
+
+        context('when page 2 is selected', () => {
+          beforeEach(() => {
+            cy.findByLabelText('Page 2').click();
+          });
+
+          it('should show pages 1 through 5 and page 10', () => {
+            cy.findByLabelText(/Page 1$/).should('exist');
+            cy.findByLabelText(/Page 2$/).should('exist');
+            cy.findByLabelText(/Page 3$/).should('exist');
+            cy.findByLabelText(/Page 4$/).should('exist');
+            cy.findByLabelText(/Page 5$/).should('exist');
+            cy.findByLabelText(/Page 10$/).should('exist');
+          });
+        });
+
+        context('when page 3 is selected', () => {
+          beforeEach(() => {
+            cy.findByLabelText('Page 3').click();
+          });
+
+          it('should show pages 1 through 5 and page 10', () => {
+            cy.findByLabelText(/Page 1$/).should('exist');
+            cy.findByLabelText(/Page 2$/).should('exist');
+            cy.findByLabelText(/Page 3$/).should('exist');
+            cy.findByLabelText(/Page 4$/).should('exist');
+            cy.findByLabelText(/Page 5$/).should('exist');
+            cy.findByLabelText(/Page 10$/).should('exist');
+          });
+        });
+
+        context('when page 4 is selected', () => {
+          beforeEach(() => {
+            cy.findByLabelText('Page 4').click();
+          });
+
+          it('should show pages 2 through 6 and page 10', () => {
+            cy.findByLabelText(/Page 2$/).should('exist');
+            cy.findByLabelText(/Page 3$/).should('exist');
+            cy.findByLabelText(/Page 4$/).should('exist');
+            cy.findByLabelText(/Page 5$/).should('exist');
+            cy.findByLabelText(/Page 6$/).should('exist');
+            cy.findByLabelText(/Page 10$/).should('exist');
+          });
+        });
+
+        context('when page 6 is selected', () => {
+          beforeEach(() => {
+            cy.findByLabelText('Page 10').click();
+            cy.findByLabelText('Page 6').click();
+          });
+
+          it('should show pages 4 through 8 and page 10', () => {
+            cy.findByLabelText(/Page 4$/).should('exist');
+            cy.findByLabelText(/Page 5$/).should('exist');
+            cy.findByLabelText(/Page 6$/).should('exist');
+            cy.findByLabelText(/Page 7$/).should('exist');
+            cy.findByLabelText(/Page 8$/).should('exist');
+            cy.findByLabelText(/Page 10$/).should('exist');
+          });
+        });
+
+        context('when page 7 is selected', () => {
+          beforeEach(() => {
+            cy.findByLabelText('Page 10').click();
+            cy.findByLabelText('Page 7').click();
+          });
+
+          it('should show page 1 and pages 6 through 10', () => {
+            cy.findByLabelText(/Page 1$/).should('exist');
+            cy.findByLabelText(/Page 6$/).should('exist');
+            cy.findByLabelText(/Page 7$/).should('exist');
+            cy.findByLabelText(/Page 8$/).should('exist');
+            cy.findByLabelText(/Page 9$/).should('exist');
+            cy.findByLabelText(/Page 10$/).should('exist');
+          });
+        });
+      });
+    });
+  });
+
+  context('given Default pagination story is rendered', () => {
+    context('when screen width is larger than 500', () => {
+      beforeEach(() => {
+        h.stories.load('Labs/Pagination', 'With Go To');
+      });
+
+      it('should not have any axe errors', () => {
+        cy.checkA11y();
+      });
+
+      context('when 50 is entered into the Go To input', () => {
+        beforeEach(() => {
+          cy.findByLabelText('Go To')
+            .type('50')
+            .type('{enter}');
+        });
+
+        it('should set page 50 as the selected page', () => {
+          cy.findByText('50').should('have.attr', 'aria-label', 'Selected, Page 50');
+        });
+      });
+
+      context('when -1 is entered into the Go To input', () => {
+        beforeEach(() => {
+          cy.findByLabelText('Go To')
+            .type('-1')
+            .type('{enter}');
+        });
+
+        it('should not change the selected page', () => {
+          cy.findByText('1').should('have.attr', 'aria-label', 'Selected, Page 1');
+        });
+      });
+    });
+  });
+
+  context('when screen width is smaller than 500', () => {
+    beforeEach(() => {
+      cy.viewport(414, 736); // iPhone 6/7/8 Plus
+      h.stories.load('Labs/Pagination', 'Default');
+    });
+
+    it('should show 2 page buttons', () => {
+      cy.findAllByLabelText(/Page \d+$/).should('have.length', 2);
+    });
+
+    context('when the last page is clicked', () => {
+      beforeEach(() => {
+        cy.findByLabelText('Page 5').click();
+      });
+
+      it('should show 3 numbers', () => {
+        cy.findAllByLabelText(/Page \d+$/).should('have.length', 3);
+      });
+    });
+
+    context('when there are 3 pages', () => {
+      beforeEach(() => {
+        cy.changeKnob('total', 30);
+      });
+
+      it('should show 3 page buttons', () => {
+        cy.findAllByLabelText(/Page \d+$/).should('have.length', 3);
+      });
+    });
+  });
+});

modules/_labs/pagination/react/LICENSE

@@ -0,0 +1,51 @@
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