Gate wtfnode behind WTF_NODE env var

After thinking about it some more it's probably mostly only useful to
see the output when the tests are hanging. Otherwise there's a lot of
noise about Jest child processes and pipes.

test/helpers.ts

@@ -12,3 +12,24 @@ export interface Cookie {
   secure: boolean
   sameSite: "Strict" | "Lax" | "None"
 }
+
+/**
+ * Checks if a cookie exists in array of cookies
+ */
+export function checkForCookie(cookies: Array<Cookie>, key: string): boolean {
+  // Check for a cookie where the name is equal to key
+  return Boolean(cookies.find((cookie) => cookie.name === key))
+}
+
+/**
+ * Creates a login cookie if one doesn't already exist
+ */
+export function createCookieIfDoesntExist(cookies: Array<Cookie>, cookieToStore: Cookie): Array<Cookie> {
+  const cookieName = cookieToStore.name
+  const doesCookieExist = checkForCookie(cookies, cookieName)
+  if (!doesCookieExist) {
+    const updatedCookies = [...cookies, cookieToStore]
+    return updatedCookies
+  }
+  return cookies
+}