From 8a61ff432543a29234193cd1f7c14abd3f3d31a0 Mon Sep 17 00:00:00 2001
From: Felix Mulder <felix.mulder@gmail.com>
Date: Wed, 2 Nov 2016 11:08:28 +0100
Subject: Move compiler and compiler tests to compiler dir

---
 compiler/test/dotty/tools/dotc/repl/TestREPL.scala | 66 ++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 compiler/test/dotty/tools/dotc/repl/TestREPL.scala

(limited to 'compiler/test/dotty/tools/dotc/repl')

diff --git a/compiler/test/dotty/tools/dotc/repl/TestREPL.scala b/compiler/test/dotty/tools/dotc/repl/TestREPL.scala
new file mode 100644
index 000000000..2263e85a0
--- /dev/null
+++ b/compiler/test/dotty/tools/dotc/repl/TestREPL.scala
@@ -0,0 +1,66 @@
+package dotty.tools.dotc
+package repl
+
+import core.Contexts.Context
+import collection.mutable
+import java.io.StringWriter
+
+/** A subclass of REPL used for testing.
+ *  It takes a transcript of a REPL session in `script`. The transcript
+ *  starts with the first input prompt `scala> ` and ends with `scala> :quit` and a newline.
+ *  Invoking `process()` on the `TestREPL` runs all input lines and
+ *  collects then interleaved with REPL output in a string writer `out`.
+ *  Invoking `check()` checks that the collected output matches the original
+ *  `script`.
+ */
+class TestREPL(script: String) extends REPL {
+
+  private val out = new StringWriter()
+
+  override lazy val config = new REPL.Config {
+    override val output = new NewLinePrintWriter(out)
+
+    override def context(ctx: Context) = {
+      val fresh = ctx.fresh
+      fresh.setSetting(ctx.settings.color, "never")
+      fresh.setSetting(
+        ctx.settings.classpath,
+        "../library/target/scala-2.11/dotty-library_2.11-0.1-SNAPSHOT.jar"
+      )
+      fresh.initialize()(fresh)
+      fresh
+    }
+
+    override def input(in: Interpreter)(implicit ctx: Context) = new InteractiveReader {
+      val lines = script.lines.buffered
+      def readLine(prompt: String): String = {
+        val line = lines.next
+        val buf = new StringBuilder
+        if (line.startsWith(prompt)) {
+          output.println(line)
+          buf append line.drop(prompt.length)
+          while (lines.hasNext && lines.head.startsWith(continuationPrompt)) {
+            val continued = lines.next
+            output.println(continued)
+            buf append System.lineSeparator()
+            buf append continued.drop(continuationPrompt.length)
+          }
+          buf.toString
+        }
+        else readLine(prompt)
+      }
+      val interactive = false
+    }
+  }
+
+  def check() = {
+    out.close()
+    val printed = out.toString
+    val transcript = printed.drop(printed.indexOf(config.prompt))
+    if (transcript.toString.lines.toList != script.lines.toList) {
+      println("input differs from transcript:")
+      println(transcript)
+      assert(false)
+    }
+  }
+}
-- 
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