Add org.apache.commons.io.function.IOStreamTest.testAdaptAsParallel()

Author: garydgregory

src/test/java/org/apache/commons/io/function/IOStreamTest.java

@@ -72,6 +72,14 @@ public void testAdapt() {
         assertEquals(1, IOStream.adapt(Stream.of("A")).count());
     }
 
+    @SuppressWarnings("resource") // custom stream not recognized by compiler warning machinery
+    @Test
+    public void testAdaptAsParallel() {
+        assertEquals(0, IOStream.adapt((Stream<?>) null).parallel().count());
+        assertEquals(0, IOStream.adapt(Stream.empty()).parallel().count());
+        assertEquals(1, IOStream.adapt(Stream.of("A")).parallel().count());
+    }
+
     @SuppressWarnings("resource") // custom stream not recognized by compiler warning machinery
     @Test
     public void testAllMatch() throws IOException {