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MockFtpServer

The MockFtpServer project provides mock/dummy FTP server implementations for testing FTP client code. Two FTP Server implementations are provided, each at a different level of abstraction. FakeFtpServer provides a higher-level abstraction. You define a virtual file system, including directories and files, as well as a set of valid user accounts and credentials. The FakeFtpServer then responds with appropriate replies and reply codes based on that configuration. StubFtpServer, on the other hand, is a lower-level "stub" implementation. You configure the individual FTP server commands to return custom data or reply codes, allowing simulation of either success or failure scenarios. You can also verify expected command invocations.
http://mockftpserver.sourceforge.net/
Apache 2
responds lower client individual verify higher implementations level directories file credentials configure custom appropriate code that project system failure replies abstraction then codes mockftpserver dummy each virtual different valid other commands data well simulation scenarios hand allowing command stubftpserver reply files define with accounts mock stub return invocations provides fakeftpserver either expected including implementation provided testing server configuration user success also based
Files download
File Operation
MockFtpServer-2.0-rc2.jar download
MockFtpServer-2.0-rc2.pom download
MockFtpServer-2.0-rc2-sources.jar download
Apache Maven 
<dependency>
  <groupId>org.mockftpserver</groupId>
  <artifactId>MockFtpServer</artifactId>
  <version>2.0-rc2</version>
</dependency>
Gradle Groovy 
implementation 'org.mockftpserver:MockFtpServer:2.0-rc2'
Gradle Kotlin 
implementation("org.mockftpserver:MockFtpServer:2.0-rc2")
Scala SBT 
libraryDependencies += "org.mockftpserver" % "MockFtpServer" % "2.0-rc2"
Groovy Grape 
@Grapes(
  @Grab(group='org.mockftpserver', module='MockFtpServer', version='2.0-rc2')
)
Apache Ivy 
<dependency org="org.mockftpserver" name="MockFtpServer" rev="2.0-rc2" />
Leiningen 
[org.mockftpserver/MockFtpServer "2.0-rc2"]
Apache Buildr 
'org.mockftpserver:MockFtpServer:jar:2.0-rc2'
Dependencies

compile

|-- log4j:log4j:1.2.13

test

|-- org.codehaus.groovy.maven.runtime:gmaven-runtime-default:1.0-rc-3

|-- commons-net:commons-net:1.4.1

|-- easymock:easymock:1.2_Java1.3

|-- junit-addons:junit-addons:1.4

|-- org.springframework:spring:2.0.7