Don't send RESET message when the connection is not open

bolt-connection/src/connection/connection-channel.js

@@ -270,7 +270,10 @@ export default class ChannelConnection extends Connection {
    */
   _handleFatalError (error) {
     this._isBroken = true
-    this._error = this.handleAndTransformError(this._protocol.currentFailure || error, this._address)
+    this._error = this.handleAndTransformError(
+      this._protocol.currentFailure || error,
+      this._address
+    )
 
     if (this._log.isErrorEnabled()) {
       this._log.error(
@@ -320,6 +323,10 @@ export default class ChannelConnection extends Connection {
   }
 
   _resetOnFailure () {
+    if (!this.isOpen()) {
+      return
+    }
+
     this._protocol.reset({
       onError: () => {
         this._protocol.resetFailure()

bolt-connection/test/channel/browser/browser-channel.test.js

@@ -294,6 +294,38 @@ describe('WebSocketChannel', () => {
     }
   })
 
+  describe('.close()', () => {
+    it('should set _open to false before resolve the promise', async () => {
+      const fakeSetTimeout = setTimeoutMock.install()
+      try {
+        // do not execute setTimeout callbacks
+        fakeSetTimeout.pause()
+        const address = ServerAddress.fromUrl('bolt://localhost:8989')
+        const driverConfig = { connectionTimeout: 4242 }
+        const channelConfig = new ChannelConfig(
+          address,
+          driverConfig,
+          SERVICE_UNAVAILABLE
+        )
+        webSocketChannel = new WebSocketChannel(
+          channelConfig,
+          undefined,
+          createWebSocketFactory(WS_OPEN)
+        )
+
+        expect(webSocketChannel._open).toBe(true)
+
+        const promise = webSocketChannel.close()
+
+        expect(webSocketChannel._open).toBe(false)
+
+        await promise
+      } finally {
+        fakeSetTimeout.uninstall()
+      }
+    })
+  })
+
   describe('.setupReceiveTimeout()', () => {
     beforeEach(() => {
       const address = ServerAddress.fromUrl('http://localhost:8989')

bolt-connection/test/channel/node/node-channel.test.js

@@ -44,6 +44,20 @@ describe('NodeChannel', () => {
     return expect(channel.close()).resolves.not.toThrow()
   })
 
+  describe('.close()', () => {
+    it('should set _open to false before resolve the promise', async () => {
+      const channel = createMockedChannel(true)
+
+      expect(channel._open).toBe(true)
+
+      const promise = channel.close()
+
+      expect(channel._open).toBe(false)
+
+      await promise
+    })
+  })
+
   describe('.setupReceiveTimeout()', () => {
     it('should call socket.setTimeout(receiveTimeout)', () => {
       const receiveTimeout = 42

bolt-connection/test/connection/connection-channel.test.js

@@ -19,7 +19,6 @@
 
 import ChannelConnection from '../../src/connection/connection-channel'
 import { int, internal } from 'neo4j-driver-core'
-import { add } from 'lodash'
 
 const {
   serverAddress: { ServerAddress },
@@ -127,6 +126,69 @@ describe('ChannelConnection', () => {
     )
   })
 
+  describe('._resetOnFailure()', () => {
+    describe('when connection isOpen', () => {
+      it('should call protocol.reset() and then protocol.resetFailure() onComplete', () => {
+        const channel = {
+          _open: true
+        }
+
+        const protocol = {
+          reset: jest.fn(observer => observer.onComplete()),
+          resetFailure: jest.fn()
+        }
+        const protocolSupplier = () => protocol
+        const connection = spyOnConnectionChannel({ channel, protocolSupplier })
+
+        connection._resetOnFailure()
+
+        expect(protocol.reset).toHaveBeenCalled()
+        expect(protocol.resetFailure).toHaveBeenCalled()
+      })
+
+      it('should call protocol.reset() and then protocol.resetFailure() onError', () => {
+        const channel = {
+          _open: true
+        }
+
+        const protocol = {
+          reset: jest.fn(observer => observer.onError()),
+          resetFailure: jest.fn()
+        }
+        const protocolSupplier = () => protocol
+        const connection = spyOnConnectionChannel({ channel, protocolSupplier })
+
+        connection._resetOnFailure()
+
+        expect(protocol.reset).toHaveBeenCalled()
+        expect(protocol.resetFailure).toHaveBeenCalled()
+      })
+    })
+
+    describe('when connection is not open', () => {
+      it('should not call protocol.reset() and protocol.resetFailure()', () => {
+        const channel = {
+          _open: false
+        }
+
+        const protocol = {
+          reset: jest.fn(observer => {
+            observer.onComplete()
+            observer.onError()
+          }),
+          resetFailure: jest.fn()
+        }
+        const protocolSupplier = () => protocol
+        const connection = spyOnConnectionChannel({ channel, protocolSupplier })
+
+        connection._resetOnFailure()
+
+        expect(protocol.reset).not.toHaveBeenCalled()
+        expect(protocol.resetFailure).not.toHaveBeenCalled()
+      })
+    })
+  })
+
   function spyOnConnectionChannel ({
     channel,
     errorHandler,

core/src/internal/connection-holder.ts

@@ -179,10 +179,13 @@ class ConnectionHolder implements ConnectionHolderInterface {
     this._connectionPromise = this._connectionPromise
       .then((connection?: Connection) => {
         if (connection) {
-          return connection
-            .resetAndFlush()
-            .catch(ignoreError)
-            .then(() => connection._release())
+          if (connection.isOpen()) {
+            return connection
+              .resetAndFlush()
+              .catch(ignoreError)
+              .then(() => connection._release())
+          }
+          return connection._release()
         } else {
           return Promise.resolve()
         }

test/internal/connection-holder.test.js

@@ -292,6 +292,116 @@ describe('#unit ConnectionHolder', () => {
 
     expect(connectionHolder.database()).toBe('testdb')
   })
+
+  describe('.releaseConnection()', () => {
+    describe('when the connection is initialized', () => {
+      describe('and connection is open', () => {
+        let connection
+
+        beforeEach(async () => {
+          connection = new FakeConnection()
+          const connectionProvider = newSingleConnectionProvider(connection)
+          const connectionHolder = new ConnectionHolder({
+            mode: READ,
+            connectionProvider
+          })
+
+          connectionHolder.initializeConnection()
+
+          await connectionHolder.releaseConnection()
+        })
+
+        it('should call connection.resetAndFlush', () => {
+          expect(connection.resetInvoked).toBe(1)
+        })
+
+        it('should call connection._release()', () => {
+          expect(connection.releaseInvoked).toBe(1)
+        })
+      })
+
+      describe('and connection is not open', () => {
+        let connection
+
+        beforeEach(async () => {
+          connection = new FakeConnection()
+          connection._open = false
+          const connectionProvider = newSingleConnectionProvider(connection)
+          const connectionHolder = new ConnectionHolder({
+            mode: READ,
+            connectionProvider
+          })
+
+          connectionHolder.initializeConnection()
+
+          await connectionHolder.releaseConnection()
+        })
+
+        it('should not call connection.resetAndFlush', () => {
+          expect(connection.resetInvoked).toBe(0)
+        })
+
+        it('should call connection._release()', () => {
+          expect(connection.releaseInvoked).toBe(1)
+        })
+      })
+    })
+  })
+
+  describe('.close()', () => {
+    describe('when the connection is initialized', () => {
+      describe('and connection is open', () => {
+        let connection
+
+        beforeEach(async () => {
+          connection = new FakeConnection()
+          const connectionProvider = newSingleConnectionProvider(connection)
+          const connectionHolder = new ConnectionHolder({
+            mode: READ,
+            connectionProvider
+          })
+
+          connectionHolder.initializeConnection()
+
+          await connectionHolder.close()
+        })
+
+        it('should call connection.resetAndFlush', () => {
+          expect(connection.resetInvoked).toBe(1)
+        })
+
+        it('should call connection._release()', () => {
+          expect(connection.releaseInvoked).toBe(1)
+        })
+      })
+
+      describe('and connection is not open', () => {
+        let connection
+
+        beforeEach(async () => {
+          connection = new FakeConnection()
+          connection._open = false
+          const connectionProvider = newSingleConnectionProvider(connection)
+          const connectionHolder = new ConnectionHolder({
+            mode: READ,
+            connectionProvider
+          })
+
+          connectionHolder.initializeConnection()
+
+          await connectionHolder.close()
+        })
+
+        it('should not call connection.resetAndFlush', () => {
+          expect(connection.resetInvoked).toBe(0)
+        })
+
+        it('should call connection._release()', () => {
+          expect(connection.releaseInvoked).toBe(1)
+        })
+      })
+    })
+  })
 })
 
 class RecordingConnectionProvider extends SingleConnectionProvider {

test/result.test.js

@@ -73,7 +73,7 @@ describe('#integration result stream', () => {
         done()
       },
       onError: error => {
-        console.log(error)
+        done.fail(error)
       }
     })
   })