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author | Ilya Maykov <ivmaykov@gmail.com> | 2013-09-30 16:45:48 -0700 |
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committer | Ilya Maykov <ivmaykov@gmail.com> | 2013-10-01 16:39:32 -0700 |
commit | 55a558a50bf4e020db6de2cd0bd9dbe2e5179eda (patch) | |
tree | 28e03f58df49491c39afe2d4a3428eb063e8eb45 /test/junit | |
parent | 2bba7797028a19b541b5bd88bd2b732e9a58681c (diff) | |
download | scala-55a558a50bf4e020db6de2cd0bd9dbe2e5179eda.tar.gz scala-55a558a50bf4e020db6de2cd0bd9dbe2e5179eda.tar.bz2 scala-55a558a50bf4e020db6de2cd0bd9dbe2e5179eda.zip |
SI-7883 - don't iterate over all keys in MapWrapper.containsKey()
Diffstat (limited to 'test/junit')
-rw-r--r-- | test/junit/scala/collection/convert/MapWrapperTest.scala | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/test/junit/scala/collection/convert/MapWrapperTest.scala b/test/junit/scala/collection/convert/MapWrapperTest.scala new file mode 100644 index 0000000000..060b6b5937 --- /dev/null +++ b/test/junit/scala/collection/convert/MapWrapperTest.scala @@ -0,0 +1,49 @@ +package scala.collection.convert + +import org.junit.Assert._ +import org.junit.Test +import org.junit.runner.RunWith +import org.junit.runners.JUnit4 + +@RunWith(classOf[JUnit4]) +class MapWrapperTest { + + /* Test for SI-7883 */ + @Test + def testContains() { + import scala.collection.JavaConverters.mapAsJavaMapConverter + import scala.language.reflectiveCalls // for accessing containsCounter + + // A HashMap which throws an exception when the iterator() method is called. + // Before the fix for SI-7883, calling MapWrapper.containsKey() used to + // iterate through every element of the wrapped Map, and thus would crash + // in this case. + val scalaMap = new scala.collection.mutable.HashMap[String, String] { + var containsCounter = 0 // keep track of how often contains() has been called. + override def iterator = throw new UnsupportedOperationException + + override def contains(key: String): Boolean = { + containsCounter += 1 + super.contains(key) + } + } + + val javaMap = scalaMap.asJava + + scalaMap("hello") = "world" + scalaMap(null) = "null's value" + + assertEquals(0, scalaMap.containsCounter) + assertTrue(javaMap.containsKey("hello")) // positive test + assertTrue(javaMap.containsKey(null)) // positive test, null key + + assertFalse(javaMap.containsKey("goodbye")) // negative test + // Note: this case does NOT make it to scalaMap's contains() method because the runtime + // cast fails in MapWrapper, so the containsCounter is not incremented in this case. + assertFalse(javaMap.containsKey(42)) // negative test, wrong key type + + assertEquals(Some("null's value"), scalaMap.remove(null)) + assertFalse(javaMap.containsKey(null)) // negative test, null key + assertEquals(4, scalaMap.containsCounter) + } +} |