meta: supplemental tests for #4537 (via #4828)

* `test/e2e` -> `test/e2e-selenium`

* add Cypress

* ESLint fixes

* MOAR cypress

* `integration` -> `tests`

* wire Cypress up to a hot e2e server

* add failing tests for #4537

* Update package.json

test/e2e-cypress/tests/deep-linking.js

@@ -1,5 +1,44 @@
-describe("The Home Page", function () {
-  it("successfully loads", function () {
-    cy.visit("/")
+describe("Deep linking feature", () => {
+  describe("in Swagger 2", () => {
+    beforeEach(() => {
+      cy.visit("/?deepLinking=true&url=/documents/features/deep-linking.swagger.yaml")
+    })
+    it("should generate an element ID and URL fragment for an operation", () => {
+      cy.get(".opblock-get")
+        .should("exist")
+        .should("have.id", "operations-myTag-myOperation")
+        .click()
+        .window()
+        .should("have.deep.property", "location.hash", "#/myTag/myOperation")
+    })
+    it("should generate an element ID and URL fragment for an operation with spaces", () => {
+      cy.get(".opblock-post")
+        .should("exist")
+        .should("have.id", "operations-my_Tag-my_Operation")
+        .click()
+        .window()
+        .should("have.deep.property", "location.hash", "#/my%20Tag/my%20Operation")
+    })
+  })
+  describe("in OpenAPI 3", () => {
+    beforeEach(() => {
+      cy.visit("/?deepLinking=true&url=/documents/features/deep-linking.openapi.yaml")
+    })
+    it("should generate an element ID and URL fragment for an operation", () => {
+      cy.get(".opblock-get")
+        .should("exist")
+        .should("have.id", "operations-myTag-myOperation")
+        .click()
+        .window()
+        .should("have.deep.property", "location.hash", "#/myTag/myOperation")
+    })
+    it("should generate an element ID and URL fragment for an operation with spaces", () => {
+      cy.get(".opblock-post")
+        .should("exist")
+        .should("have.id", "operations-my_Tag-my_Operation")
+        .click()
+        .window()
+        .should("have.deep.property", "location.hash", "#/my%20Tag/my%20Operation")
+    })
   })
 })