testkit-backend: implements ResolverResolutionRequired message

testkit-backend/src/context.js

@@ -4,6 +4,7 @@ export default class Context {
     this._drivers = {}
     this._sessions = {}
     this._txs = {}
+    this._resolverRequests = {}
     this._resultObservers = {}
     this._errors = {}
   }
@@ -35,6 +36,14 @@ export default class Context {
     return this._add(this._resultObservers, observer)
   }
 
+  addResolverRequest (resolve, reject) {
+    const id = this._add(this._resolverRequests, {
+      resolve,
+      reject
+    })
+    return id
+  }
+
   getDriver (id) {
     return this._drivers[id]
   }
@@ -55,6 +64,10 @@ export default class Context {
     return this._errors[id]
   }
 
+  getResolverRequest (id) {
+    return this._resolverRequests[id]
+  }
+
   removeDriver (id) {
     delete this._drivers[id]
   }
@@ -71,6 +84,10 @@ export default class Context {
     delete this._resultObservers[id]
   }
 
+  removeResolverRequest (id) {
+    delete this._resolverRequests[id]
+  }
+
   getResultObserversBySessionId (sessionId) {
     return Object.values(this._resultObservers).filter(
       obs => obs.sessionId === sessionId

testkit-backend/src/request-handlers.js

@@ -6,9 +6,17 @@ export function NewDriver (context, data, { writeResponse }) {
   const {
     uri,
     authorizationToken: { data: authToken },
-    userAgent
+    userAgent,
+    resolverRegistered
   } = data
-  const driver = neo4j.driver(uri, authToken, { userAgent, useBigInt: true })
+  const resolver = resolverRegistered
+    ? address =>
+      new Promise((resolve, reject) => {
+        const id = context.addResolverRequest(resolve, reject)
+        writeResponse('ResolverResolutionRequired', { id, address })
+      })
+    : undefined
+  const driver = neo4j.driver(uri, authToken, { userAgent, resolver, useBigInt: true })
   const id = context.addDriver(driver)
   writeResponse('Driver', { id })
 }
@@ -255,3 +263,12 @@ export function CheckMultiDBSupport (context, { driverId }, wire) {
     )
     .catch(error => wire.writeError(error))
 }
+
+export function ResolverResolutionCompleted (
+  context,
+  { requestId, addresses },
+  wire
+) {
+  const request = context.getResolverRequest(requestId)
+  request.resolve(addresses)
+}