Add test for type variance in hasEntry (hamcrest#107)

tumbarumba · Sep 22, 2024 · 73d0617 · 73d0617
1 parent 804b583
commit 73d0617
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/hamcrest/src/test/java/org/hamcrest/collection/IsMapContainingTest.java b/hamcrest/src/test/java/org/hamcrest/collection/IsMapContainingTest.java
@@ -7,6 +7,7 @@
 import java.util.Map;
 import java.util.TreeMap;
 
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.collection.IsMapContaining.hasEntry;
 import static org.hamcrest.core.IsAnything.anything;
 import static org.hamcrest.core.IsEqual.equalTo;
@@ -47,4 +48,11 @@ public void testHasReadableDescription() {
         assertDescription("map containing [\"a\"-><2>]", hasEntry(equalTo("a"), (equalTo(2))));
     }
 
+    public void testTypeVariance() {
+        Map<String, Number> m = new HashMap<>();
+        Integer foo = 6;
+        m.put("foo", foo);
+        assertThat(m, hasEntry("foo", foo));
+    }
+
 }