moved Java test into groovy

src/test/groovy/io/jsonwebtoken/impl/JwtMapTest.groovy

@@ -124,4 +124,28 @@ class JwtMapTest {
         def s = ['b', 'd']
         assertTrue m.values().containsAll(s) && s.containsAll(m.values())
     }
+
+    @Test
+    public void testEquals() throws Exception {
+        def m1 = new JwtMap();
+        m1.put("a", "a");
+
+        def m2 = new JwtMap();
+        m2.put("a", "a");
+
+        assertEquals(m1, m2);
+    }
+
+    @Test
+    public void testHashcode() throws Exception {
+        def m = new JwtMap();
+        def hashCodeEmpty = m.hashCode();
+
+        m.put("a", "b");
+        def hashCodeNonEmpty = m.hashCode();
+        assertTrue(hashCodeEmpty != hashCodeNonEmpty);
+
+        def identityHash = System.identityHashCode(m);
+        assertTrue(hashCodeNonEmpty != identityHash);
+    }
 }

src/test/java/io.jsonwebtoken.impl/JavaJwtMapTest.java

@@ -1,39 +0,0 @@
-package io.jsonwebtoken.impl;
-
-import org.junit.Test;
-
-import static junit.framework.Assert.assertTrue;
-import static junit.framework.TestCase.assertEquals;
-
-/**
- * Java specific test to ensure we don't hit Groovy's DefaultGroovyMethods
- */
-public class JavaJwtMapTest
-{
-
-  @Test
-  public void testEquals() throws Exception
-  {
-    JwtMap jwtMap1 = new JwtMap();
-    jwtMap1.put("a", "a");
-
-    JwtMap jwtMap2 = new JwtMap();
-    jwtMap2.put("a", "a");
-
-    assertEquals(jwtMap1, jwtMap2);
-  }
-
-  @Test
-  public void testHashCode() throws Exception
-  {
-    JwtMap jwtMap = new JwtMap();
-    int hashCodeEmpty = jwtMap.hashCode();
-
-    jwtMap.put("a", "b");
-    int hashCodeNonEmpty = jwtMap.hashCode();
-    assertTrue(hashCodeEmpty != hashCodeNonEmpty);
-
-    int identityHash = System.identityHashCode(jwtMap);
-    assertTrue(hashCodeNonEmpty != identityHash);
-  }
-}