core/test/src/mill/main/JavaCompileJarTests.scala


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package mill.main

import ammonite.ops._
import mill.util.ScriptTestSuite
import utest._

object JavaCompileJarTests extends ScriptTestSuite {
  def workspaceSlug = "java-compile-jar"
  def scriptSourcePath = pwd / 'core / 'test / 'resources / 'examples / 'javac
  val tests = Tests{
    initWorkspace()
    'test - {
      // Basic target evaluation works
      assert(eval("classFiles"))
      assert(eval("jar"))

      val classFiles1 = meta("classFiles")
      val jar1 = meta("jar")

      assert(eval("classFiles"))
      assert(eval("jar"))

      // Repeated evaluation has the same results
      val classFiles2 = meta("classFiles")
      val jar2 = meta("jar")

      assert(
        jar1 == jar2,
        classFiles1 == classFiles2
      )

      // If we update resources, classFiles are unchanged but jar changes
      for(scalaFile <- ls.rec(workspacePath).filter(_.ext == "txt")){
        write.append(scalaFile, "\n")
      }

      assert(eval("classFiles"))
      assert(eval("jar"))

      val classFiles3 = meta("classFiles")
      val jar3 = meta("jar")

      assert(
        jar2 != jar3,
        classFiles2 == classFiles3
      )

      // We can intentionally break the code, have the targets break, then
      // fix the code and have them recover.
      for(scalaFile <- ls.rec(workspacePath).filter(_.ext == "java")){
        write.append(scalaFile, "\n}")
      }

      assert(!eval("classFiles"))
      assert(!eval("jar"))

      for(scalaFile <- ls.rec(workspacePath).filter(_.ext == "java")){
        write.over(scalaFile, read(scalaFile).dropRight(2))
      }

      assert(eval("classFiles"))
      assert(eval("jar"))
    }
  }
}