Update SvgrMock module name (#490)

src/ensembl/src/shared/components/external-link/ExternalLink.test.tsx

@@ -41,9 +41,8 @@ describe('<ExternalLink />', () => {
 
     expect(
       container
-        .querySelector(`icon-mock`)
-        ?.getAttribute('classname')
-        ?.includes(defaultProps.classNames?.icon as string)
+        .querySelector(`svg`)
+        ?.classList.contains(defaultProps.classNames?.icon as string)
     ).toBeTruthy();
 
     expect(

src/ensembl/src/shared/components/external-reference/ExternalReference.test.tsx

@@ -67,9 +67,8 @@ describe('<ExternalReference />', () => {
 
     expect(
       container
-        .querySelector(`.externalLinkContainer icon-mock`)
-        ?.getAttribute('classname')
-        ?.includes(defaultProps.classNames?.icon as string)
+        .querySelector(`.externalLinkContainer svg`)
+        ?.classList.contains(defaultProps.classNames?.icon as string)
     ).toBeTruthy();
 
     expect(

src/ensembl/tests/svgrMock.js

@@ -3,6 +3,6 @@
 // https://github.com/facebook/jest/issues/5258#issuecomment-356251559
 
 module.exports = {
-  default: 'icon-mock',
-  ReactComponent: 'icon-mock'
+  default: 'svg',
+  ReactComponent: 'svg'
 };