Add an implicit generator for Sets

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/java/au/id/zancanaro/javacheck/CollectionsTest.java b/src/test/java/au/id/zancanaro/javacheck/CollectionsTest.java
new file mode 100644
index 0000000..644e8a1
--- /dev/null
+++ b/src/test/java/au/id/zancanaro/javacheck/CollectionsTest.java
@@ -0,0 +1,23 @@
+package au.id.zancanaro.javacheck;
+
+import au.id.zancanaro.javacheck.annotations.Property;
+import au.id.zancanaro.javacheck.junit.Properties;
+import org.junit.runner.RunWith;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static java.util.Collections.reverse;
+import static org.junit.Assert.assertEquals;
+
+@RunWith(Properties.class)
+public class CollectionsTest {
+    @Property
+    public void reverseIsInvolution(List<Integer> list) {
+        List<Integer> newList = new ArrayList<>(list);
+        reverse(newList);
+        reverse(newList);
+
+        assertEquals(list, newList);
+    }
+}