fix: adds no uplink spec (#213)

Author: ayusharma

src/components/UpLinks/UpLinks.test.tsx

@@ -11,6 +11,24 @@ describe('<UpLinks /> component', () => {
     expect(wrapper.html()).toBeNull();
   });
 
+  test('should render the component when there is no uplink', () => {
+    const packageMeta = {
+      latest: {
+        name: 'verdaccio',
+        version: '4.0.0',
+        dist: { fileCount: 0, unpackedSize: 0 },
+      },
+      _uplinks: {},
+    };
+
+    const wrapper = mount(
+      <DetailContext.Provider value={{ packageMeta }}>
+        <UpLinks />
+      </DetailContext.Provider>
+    );
+    expect(wrapper.html()).toMatchSnapshot();
+  });
+
   test('should render the component with uplinks', () => {
     const packageMeta = {
       latest: {

src/components/UpLinks/__snapshots__/UpLinks.test.tsx.snap

@@ -1,3 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`<UpLinks /> component should render the component when there is no uplink 1`] = `"<h6 class=\\"MuiTypography-root MuiTypography-subtitle1 MuiTypography-gutterBottom\\">verdaccio has no uplinks.</h6>"`;
+
 exports[`<UpLinks /> component should render the component with uplinks 1`] = `"<h6 class=\\"MuiTypography-root css-1vg6q84 e14i1sy10 MuiTypography-subtitle1\\">Uplinks</h6><ul class=\\"MuiList-root MuiList-padding\\"><li class=\\"MuiListItem-root MuiListItem-gutters\\"><div class=\\"MuiListItemText-root css-5tz9yo e14i1sy12\\"><span class=\\"MuiTypography-root MuiListItemText-primary MuiTypography-body1\\">npmjs</span></div><div class=\\"css-1l1cv61 e14i1sy11\\"></div><div class=\\"MuiListItemText-root css-5tz9yo e14i1sy12\\"><span class=\\"MuiTypography-root MuiListItemText-primary MuiTypography-body1\\">over 1 year ago</span></div></li></ul>"`;