1 files changed, 74 insertions, 0 deletions
diff --git a/examples/scala-js/tools/jvm/src/test/scala/scala/scalajs/tools/classpath/builder/test/JarBuilderTest.scala b/examples/scala-js/tools/jvm/src/test/scala/scala/scalajs/tools/classpath/builder/test/JarBuilderTest.scala
new file mode 100644
index 0000000..6ed68fc
--- /dev/null
+++ b/examples/scala-js/tools/jvm/src/test/scala/scala/scalajs/tools/classpath/builder/test/JarBuilderTest.scala
@@ -0,0 +1,74 @@
+package scala.scalajs.tools.classpath.builder.test
+
+import scala.scalajs.tools.classpath.builder._
+
+import org.junit.Test
+import org.junit.Assert._
+
+class JarBuilderTest {
+
+  val jsFileContent = "window.alert('Hello World');"
+  val jsFileName = "lib.js"
+
+  private def getJARInputStream = {
+    // Keep imports local so we don't accidentally use something we shouldn't
+    import java.util.zip._
+    import java.io._
+
+    // Write a ZIP to a byte array
+    val outBuf = new ByteArrayOutputStream
+    val out = new ZipOutputStream(outBuf)
+
+    out.putNextEntry(new ZipEntry(jsFileName))
+    val w = new OutputStreamWriter(out, "UTF-8")
+    w.write(jsFileContent)
+    w.flush()
+
+    out.close()
+
+    new ByteArrayInputStream(outBuf.toByteArray)
+  }
+
+  /** Trivial FS that has only one jar */
+  trait TrivialFS extends FileSystem {
+    // Keep imports local so we don't accidentally use something we shouldn't
+    import java.io.{InputStream, Reader}
+    import scala.scalajs.tools.io._
+    import scala.collection.immutable.Traversable
+
+    type File = Unit
+
+    val DummyVersion: String = "DUMMY"
+
+    def isDirectory(f: File): Boolean = false
+    def isFile(f: File): Boolean = true
+    def isJSFile(f: File): Boolean = false
+    def isIRFile(f: File): Boolean = false
+    def isJARFile(f: File): Boolean = true
+    def exists(f: File): Boolean = true
+
+    def getName(f: File): String = "jar"
+    def getAbsolutePath(f: File): String = "jar"
+    def getVersion(f: File): String = ""
+
+    def listFiles(d: File): Traversable[File] = ???
+
+    def toJSFile(f: File): VirtualJSFile = ???
+    def toIRFile(f: File): VirtualScalaJSIRFile = ???
+    def toReader(f: File): Reader = ???
+    def toInputStream(f: File): InputStream = getJARInputStream
+  }
+
+  class TestJARBuilder extends AbstractJarLibClasspathBuilder with TrivialFS
+
+  @Test
+  def readInMemoryJarClasspath {
+    val builder = new TestJARBuilder
+    val cp = builder.build(Seq(()))
+
+    assertArrayEquals(
+        Array[Object](jsFileName -> jsFileContent),
+        cp.availableLibs.mapValues(_.content).toArray[Object])
+  }
+
+}