add more comment

x-pack/test/epm_api_integration/apis/template.ts

@@ -17,6 +17,9 @@ export default function({ getService }: FtrProviderContext) {
 
     const body = getTemplate(indexPattern);
 
+    // This test is not an API integration test with Kibana
+    // We want to test here if the template is valid and for this we need a running ES instance.
+    // If the ES instance takes the template, we assume it is a valid template.
     const { body: response } = await es.indices.putTemplate({
       name: templateName,
       body,
@@ -26,6 +29,8 @@ export default function({ getService }: FtrProviderContext) {
 
     const { body: indexTemplate } = await es.indices.getTemplate({ name: templateName });
     // Checks if the content of the template that was loaded is as expected
+    // We already know based on the above test that the template was valid
+    // but we check here also if we wrote the index pattern inside the template as expected
     expect(indexTemplate[templateName].index_patterns).to.eql([indexPattern]);
   });
 }