Add REPL tests

1 files changed, 40 insertions, 0 deletions

diff --git a/test/test/TestREPL.scala b/test/test/TestREPL.scala
new file mode 100644
index 000000000..a9978cdde
--- /dev/null
+++ b/test/test/TestREPL.scala
@@ -0,0 +1,40 @@
+package test
+
+import dotty.tools.dotc.repl._
+import dotty.tools.dotc.core.Contexts.Context
+import collection.mutable
+import java.io.StringWriter
+
+
+class TestREPL(script: String) extends REPL {
+
+  private val prompt             = "scala> "
+  private val continuationPrompt = "     | "
+
+  private val out = new StringWriter()
+  override val output = new NewLinePrintWriter(out)
+
+  override def input(implicit ctx: Context) = new InteractiveReader {
+    val lines = script.lines
+    def readLine(prompt: String): String = {
+      val line = lines.next
+      if (line.startsWith(prompt) || line.startsWith(continuationPrompt)) {
+        output.println(line)
+        line.drop(prompt.length)
+      }
+      else readLine(prompt)
+    }
+    val interactive = false
+  }
+
+  def check() = {
+    out.close()
+    val printed = out.toString
+    val transcript = printed.drop(printed.indexOf(prompt))
+    if (transcript.toString != script) {
+      println("input differs from transcript:")
+      println(transcript)
+      assert(false)
+    }
+  }
+}
\ No newline at end of file