From 010b9d1c10de92fb62623b5e7a4f5c35809c7637 Mon Sep 17 00:00:00 2001
From: Mark Harrah <dmharrah@gmail.com>
Date: Fri, 22 Feb 2013 16:31:32 -0500
Subject: [PATCH] test for #678

---
 sbt/src/sbt-test/source-dependencies/ext/A.scala   | 5 +++++
 sbt/src/sbt-test/source-dependencies/ext/build.sbt | 9 +++++++++
 sbt/src/sbt-test/source-dependencies/ext/test      | 7 +++++++
 3 files changed, 21 insertions(+)
 create mode 100644 sbt/src/sbt-test/source-dependencies/ext/A.scala
 create mode 100644 sbt/src/sbt-test/source-dependencies/ext/build.sbt
 create mode 100644 sbt/src/sbt-test/source-dependencies/ext/test

diff --git a/sbt/src/sbt-test/source-dependencies/ext/A.scala b/sbt/src/sbt-test/source-dependencies/ext/A.scala
new file mode 100644
index 000000000..ad9931075
--- /dev/null
+++ b/sbt/src/sbt-test/source-dependencies/ext/A.scala
@@ -0,0 +1,5 @@
+import sun.net.spi.nameservice.dns.DNSNameService
+
+object A {
+	val x = new DNSNameService
+}
\ No newline at end of file
diff --git a/sbt/src/sbt-test/source-dependencies/ext/build.sbt b/sbt/src/sbt-test/source-dependencies/ext/build.sbt
new file mode 100644
index 000000000..8aaec76ec
--- /dev/null
+++ b/sbt/src/sbt-test/source-dependencies/ext/build.sbt
@@ -0,0 +1,9 @@
+import complete.DefaultParsers._
+
+val checkIterations = inputKey[Unit]("Verifies the accumlated number of iterations of incremental compilation.")
+
+checkIterations := {
+	val expected: Int = (Space ~> NatBasic).parsed
+	val actual: Int = (compile in Compile).value.compilations.allCompilations.size
+	assert(expected == actual, s"Expected $expected compilations, got $actual")
+}
\ No newline at end of file
diff --git a/sbt/src/sbt-test/source-dependencies/ext/test b/sbt/src/sbt-test/source-dependencies/ext/test
new file mode 100644
index 000000000..2b01a3de7
--- /dev/null
+++ b/sbt/src/sbt-test/source-dependencies/ext/test
@@ -0,0 +1,7 @@
+# initial compilation
+> checkIterations 1
+
+# no further compilation should be necessary, since nothing changed
+# previously, a dependency on a jar in <java.home>lib/ext/ would
+# always force recompilation
+> checkIterations 1
\ No newline at end of file