From de1d294f5e2349fe9bcbc6a44990c8f641f71d37 Mon Sep 17 00:00:00 2001
From: Shane Delmore <shane@delmore.io>
Date: Mon, 7 Dec 2015 22:02:23 -0800
Subject: SI-9583: Update SystemProperties.empty to return a mutable.Map to fix
 builders

---
 test/junit/scala/util/SystemPropertiesTest.scala | 27 ++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 test/junit/scala/util/SystemPropertiesTest.scala

(limited to 'test')

diff --git a/test/junit/scala/util/SystemPropertiesTest.scala b/test/junit/scala/util/SystemPropertiesTest.scala
new file mode 100644
index 0000000000..38e830eb88
--- /dev/null
+++ b/test/junit/scala/util/SystemPropertiesTest.scala
@@ -0,0 +1,27 @@
+package scala.util
+
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import org.junit.Test
+import org.junit.Assert._
+
+@RunWith(classOf[JUnit4])
+class SystemPropertiesTest {
+  @Test
+  def filterAll(): Unit = {
+    val isEmpty = sys.props.filter(_ => false).size == 0
+    assertTrue("A filter matching nothing should produce an empty result", isEmpty)
+  }
+
+  @Test
+  def filterNone(): Unit = {
+    val isUnchanged = sys.props.filter(_ => true) == sys.props
+    assertTrue("A filter matching everything should not change the result", isUnchanged)
+  }
+
+  @Test
+  def empty(): Unit = {
+    val hasSize0 = sys.props.empty.size == 0
+    assertTrue("SystemProperties.empty should have size of 0", hasSize0)
+  }
+}
-- 
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