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Diffstat (limited to 'test/junit/scala/util/SystemPropertiesTest.scala')
-rw-r--r-- | test/junit/scala/util/SystemPropertiesTest.scala | 27 |
1 files changed, 27 insertions, 0 deletions
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) + } +} |