polished up and added tests

packages/compass-indexes/src/components/create-index-form/index-flow-section.spec.tsx

@@ -2,61 +2,165 @@ import React from 'react';
 import { render, screen } from '@mongodb-js/testing-library-compass';
 import IndexFlowSection from './index-flow-section';
 import { expect } from 'chai';
+import type { Field } from '../../modules/create-index';
 
 describe('IndexFlowSection', () => {
-  const renderComponent = (createIndexFieldsComponent?: JSX.Element) => {
+  const renderComponent = ({
+    createIndexFieldsComponent,
+    fields,
+  }: {
+    createIndexFieldsComponent?: JSX.Element;
+    fields?: Field[];
+  }) => {
     render(
       <IndexFlowSection
         createIndexFieldsComponent={createIndexFieldsComponent ?? null}
-        fields={[]}
+        fields={fields || []}
         dbName={'fakeDBName'}
         collectionName={'fakeCollectionName'}
       />
     );
   };
-  it('renders the Input Index header', () => {
-    renderComponent();
-    expect(screen.getByText('Input Index')).to.be.visible;
-  });
 
-  it('renders the Code Equivalent toggle', () => {
-    renderComponent();
-    expect(screen.getByLabelText('Toggle Code Equivalent')).to.be.visible;
-  });
+  describe('when the fields are not filled in', () => {
+    it('renders the Input Index header', () => {
+      renderComponent({});
+      expect(screen.getByText('Input Index')).to.be.visible;
+    });
 
-  it('renders the Show covered queries button', () => {
-    renderComponent();
-    expect(screen.getByText('Show covered queries')).to.be.visible;
-  });
+    it('does not render the Covered Queries header', () => {
+      renderComponent({});
+      expect(screen.queryByText('Covered Queries')).to.be.null;
+    });
 
-  it('renders the Covered Queries header', () => {
-    renderComponent();
-    expect(screen.getByText('Covered Queries')).to.be.visible;
-  });
+    it('renders the Code Equivalent toggle', () => {
+      renderComponent({});
+      expect(screen.getByLabelText('Toggle Code Equivalent')).to.be.visible;
+    });
 
-  it('renders the provided createIndexFieldsComponent', () => {
-    const mockComponent = (
-      <div data-testid="mock-component">Mock Component</div>
-    );
-    renderComponent(mockComponent);
-    expect(screen.getByTestId('mock-component')).to.be.visible;
+    it('renders the Show covered queries button and it\\s disabled', () => {
+      renderComponent({});
+      const coveredQueriesButton = screen.getByTestId(
+        'index-flow-section-covered-queries-button'
+      );
+
+      expect(coveredQueriesButton).to.be.visible;
+    });
+
+    it('does not render the covered queries examples', () => {
+      renderComponent({});
+      expect(
+        screen.queryByTestId('index-flow-section-covered-queries-examples')
+      ).not.to.exist;
+    });
+
+    it('does not render the optimal query examples', () => {
+      renderComponent({});
+      expect(
+        screen.queryByTestId('index-flow-section-optimal-queries-examples')
+      ).not.to.exist;
+    });
+
+    it('renders the provided createIndexFieldsComponent', () => {
+      const mockComponent = (
+        <div data-testid="mock-component">Mock Component</div>
+      );
+      renderComponent({ createIndexFieldsComponent: mockComponent });
+      expect(screen.getByTestId('mock-component')).to.be.visible;
+    });
   });
 
-  it('renders the covered queries examples', () => {
-    renderComponent();
-    expect(screen.getByTestId('index-flow-section-covered-queries-examples')).to
-      .exist;
+  describe('when 3 index fields are filled in and user clicks on covered queries button', () => {
+    const fields: Field[] = [
+      { name: 'field1', type: '1 (asc)' },
+      { name: 'field2', type: '-1 (desc)' },
+      { name: 'field3', type: '1 (asc)' },
+    ];
+
+    beforeEach(() => {
+      renderComponent({ fields });
+      screen.getByTestId('index-flow-section-covered-queries-button').click();
+    });
+
+    it('renders the covered queries examples', () => {
+      const coveredQueriesExamples = screen.getByTestId(
+        'index-flow-section-covered-queries-examples'
+      );
+      expect(coveredQueriesExamples).to.exist;
+      expect(coveredQueriesExamples).to.contain.text(
+        JSON.stringify({
+          field1: 1,
+          field2: 2,
+          field3: 3,
+        })
+      );
+    });
+
+    it('renders the optimal query examples', () => {
+      const optimalQueriesExamples = screen.getByTestId(
+        'index-flow-section-optimal-queries-examples'
+      );
+      expect(optimalQueriesExamples).to.exist;
+      expect(optimalQueriesExamples).to.contain.text(
+        `{"field1":1,"field2":{"$gt":2}}.sort(field3: 1})`
+      );
+    });
+
+    it('renders the Learn More link', () => {
+      const link = screen.getByText('Learn More');
+      expect(link).to.be.visible;
+    });
   });
 
-  it('renders the optimal query examples', () => {
-    renderComponent();
-    expect(screen.getByTestId('index-flow-section-optimal-query-examples')).to
-      .exist;
+  describe('when 2 index fields are filled in and user clicks on covered queries button', () => {
+    const fields: Field[] = [
+      { name: 'field1', type: '1 (asc)' },
+      { name: 'field2', type: '1 (asc)' },
+    ];
+
+    beforeEach(() => {
+      renderComponent({ fields });
+      screen.getByTestId('index-flow-section-covered-queries-button').click();
+    });
+
+    it('renders the covered queries examples', () => {
+      const coveredQueriesExamples = screen.getByTestId(
+        'index-flow-section-covered-queries-examples'
+      );
+      expect(coveredQueriesExamples).to.exist;
+    });
+
+    it('renders the optimal query examples', () => {
+      const optimalQueriesExamples = screen.getByTestId(
+        'index-flow-section-optimal-queries-examples'
+      );
+      expect(optimalQueriesExamples).to.exist;
+      expect(optimalQueriesExamples).to.contain.text(
+        `{"field1":1,"field2":{"$gt":2}}}`
+      );
+      expect(optimalQueriesExamples).to.contain.text(
+        `{"field1":1}.sort({"field2":2})`
+      );
+    });
   });
 
-  it('renders the Learn More link', () => {
-    renderComponent();
-    const link = screen.getByText('Learn More');
-    expect(link).to.be.visible;
+  describe('when 1 index field is filled in and user clicks on covered queries button', () => {
+    const fields: Field[] = [{ name: 'field1', type: '1 (asc)' }];
+
+    beforeEach(() => {
+      renderComponent({ fields });
+      screen.getByTestId('index-flow-section-covered-queries-button').click();
+    });
+
+    it('renders the covered queries examples', () => {
+      expect(screen.getByTestId('index-flow-section-covered-queries-examples'))
+        .to.exist;
+    });
+
+    it('does not render the optimal query examples', () => {
+      expect(
+        screen.queryByTestId('index-flow-section-optimal-queries-examples')
+      ).not.to.exist;
+    });
   });
 });