backends-common/redis/src/test/java/org/apache/james/backends/redis/RedisConfigurationTest.scala

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package org.apache.james.backends.redis

import io.lettuce.core.RedisURI
import org.apache.commons.configuration2.PropertiesConfiguration
import org.apache.commons.configuration2.convert.DefaultListDelimiterHandler
import org.scalatest.flatspec.AnyFlatSpec
import org.scalatest.matchers.should.Matchers

class RedisConfigurationTest extends AnyFlatSpec with Matchers {

  "RedisConfiguration" should "parse Redis URI from config" in {
    val config = new PropertiesConfiguration()
    config.addProperty("redisURL", "redis://localhost:6379")
    config.addProperty("redis.topology", "master-replica")
    config.addProperty("redis.ioThreads", 16)
    config.addProperty("redis.workerThreads", 32)

    val redisConfig = RedisConfiguration.from(config)

    redisConfig.redisURI.value should have length 1
    redisConfig.redisURI.value should contain theSameElementsAs List(RedisURI.create("redis://localhost:6379"))
    redisConfig.redisTopology shouldEqual MasterReplica
    redisConfig.ioThreads shouldEqual Some(16)
    redisConfig.workerThreads shouldEqual Some(32)
  }

  it should "parse multiple Redis URIs from config" in {
    val config = new PropertiesConfiguration()
    config.setListDelimiterHandler(new DefaultListDelimiterHandler(','))
    config.addProperty("redisURL", "redis://localhost:6379,redis://localhost:6380")
    config.addProperty("redis.topology", "cluster")
    config.addProperty("redis.ioThreads", 16)
    config.addProperty("redis.workerThreads", 32)

    val redisConfig = RedisConfiguration.from(config)

    redisConfig.redisURI.value should have length 2
    redisConfig.redisURI.value should contain theSameElementsAs List(RedisURI.create("redis://localhost:6379"), RedisURI.create("redis://localhost:6380"))
    redisConfig.redisTopology shouldEqual Cluster
    redisConfig.ioThreads shouldEqual Some(16)
    redisConfig.workerThreads shouldEqual Some(32)
  }

  it should "use default values for missing config values" in {
    val config = new PropertiesConfiguration()
    config.addProperty("redisURL", "redis://localhost:6379")

    val redisConfig = RedisConfiguration.from(config)

    redisConfig.redisURI.value should have length 1
    redisConfig.redisURI.value should contain theSameElementsAs List(RedisURI.create("redis://localhost:6379"))
    redisConfig.redisTopology shouldEqual Standalone
    redisConfig.ioThreads shouldEqual None
    redisConfig.workerThreads shouldEqual None
  }

  it should "throw exception for invalid Redis URI" in {
    val config = new PropertiesConfiguration()
    config.addProperty("redisURL", "invalid://localhost:6379")

    intercept[IllegalArgumentException] {
      RedisConfiguration.from(config)
    }
  }
}