Apache Solr Search Server: Test Framework
Packages 
Package Description
org.apache.solr
Common base classes for implementing tests.
org.apache.solr.analysis
Factories for Mock analysis classes that can be used in test configurations.
org.apache.solr.cloud
Base classes and utilities for creating and testing Solr Cloud clusters.
org.apache.solr.core
Factories for Mock classes that can be used in test configurations
org.apache.solr.handler.component
Class for tracking shard requests
org.apache.solr.update.processor
Mock classes for testing Update Processor chains.
org.apache.solr.util
Misc utilities useful when implementing test cases.