test: cover the case with the network error due to cy.visit() (#188)

relates-to #105

cypress/e2e/record-network-issues.cy.ts

@@ -0,0 +1,33 @@
+describe('Record network issues', () => {
+  const url = 'https://unknown-non-well-defined-host.cypress.test.org';
+
+  beforeEach(() => {
+    cy.once('fail', () => false);
+    cy.intercept(url).as('err');
+  });
+
+  afterEach(() => {
+    cy.wait('@err').its('error.code').should('eq', 'ENOTFOUND');
+
+    cy.saveHar({ waitForIdle: true });
+
+    cy.findHar().its('log.entries').should('contain.something.like', {
+      request: {
+        url
+      }
+    });
+  });
+
+  // ADHOC: Normally, a request with an error should be included,
+  // but the cy.visit() fails ahead of time due to a resolving mechanism in Cypress.
+  // For details please follow the code at
+  // https://github.com/cypress-io/cypress/blob/fc43cecdadda62521f6167e16b48ebc37ccc858a/packages/driver/src/cy/commands/navigation.ts#L464
+  it.skip('records a request failed due DNS issues', () => {
+    cy.recordHar();
+
+    cy.visit(url, {
+      failOnStatusCode: false,
+      retryOnNetworkFailure: false
+    });
+  });
+});