Wait for Download to finish in selenium webdriver JAVA

Question

Once clicking a download button, files will be downloaded. Before executing next code, it needs to wait until the download completes.

My code looks like this:

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Answer 1

I use Scala for my automation but the port to Java should be trivial since I use java Selenium classes there anyway. So, first you need this:

import com.google.common.base.Function
import java.nio.file.{Files, Paths, Path}

def waitUntilFileDownloaded(timeOutInMillis:Int)={
    val wait:FluentWait[Path] = new FluentWait(Paths.get(downloadsDir)).withTimeout(timeOutInMillis, TimeUnit.MILLISECONDS).pollingEvery(200, TimeUnit.MILLISECONDS)
    wait.until(
      new Function[Path, Boolean] {
        override def apply(p:Path):Boolean = Files.list(p).iterator.asScala.size > 0
      }
    )
  }

Then in my test suite where I need to download xls file I just have this:

def exportToExcel(implicit driver: WebDriver) = {
    click on xpath("//div[contains(@class, 'export_csv')]")
    waitUntilFileDownloaded(2000)
  }

I hope you've got the idea. FluentWait is very useful abstraction and though it is a part of Selenium it can be used wherever you need to wait with polling till some condition is met.