Testing #hashCode of Parameters (#653)

src/test/java/net/schmizz/sshj/connection/channel/direct/ParametersTest.java

@@ -0,0 +1,67 @@
+package net.schmizz.sshj.connection.channel.direct;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.Test;
+
+public class ParametersTest {
+
+    @Test
+    public void testConstructedFields() {
+        final Parameters p = new Parameters("127.0.0.1", 8080, "github.com", 80);
+        assertEquals("127.0.0.1", p.getLocalHost());
+        assertEquals(8080, p.getLocalPort());
+        assertEquals("github.com", p.getRemoteHost());
+        assertEquals(80, p.getRemotePort());
+    }
+
+    @Test
+    public void testHashCode() {
+        final Parameters first = new Parameters("127.0.0.1", 8080, "github.com", 80);
+        final Parameters second = new Parameters("127.0.0.1", 8080, "github.com", 80);
+        assertEquals(first.hashCode(), first.hashCode());
+        assertEquals(first.hashCode(), second.hashCode());
+        assertEquals(second.hashCode(), second.hashCode());
+
+        final Parameters third = new Parameters("127.0.0.1", 443, "github.com", 80);
+        assertEquals(third.hashCode(), third.hashCode());
+        assertNotEquals(first.hashCode(), third.hashCode());
+    }
+
+    @Test
+    public void testHashMapApplicability() {
+        final Parameters first = new Parameters("127.0.0.1", 8080, "github.com", 80);
+
+        final Map<Parameters, String> map = new HashMap<>();
+        assertFalse(map.containsKey(first));
+
+        final String none = map.put(first, "is now in the map");
+        assertNull(none);
+        assertTrue(map.containsKey(first));
+        assertEquals("is now in the map", map.get(first));
+
+        final Parameters second = new Parameters("127.0.0.1", 8080, "github.com", 80);
+        assertTrue(map.containsKey(second));
+        assertEquals("is now in the map", map.get(second));
+
+        final String current = map.putIfAbsent(second, "is again in the map");
+        assertEquals("is now in the map", current);
+        assertEquals("is now in the map", map.get(first));
+        assertEquals("is now in the map", map.get(second));
+
+        final String previous = map.put(second, "is again in the map");
+        assertEquals("is now in the map", previous);
+        assertEquals("is again in the map", map.get(first));
+        assertEquals("is again in the map", map.get(second));
+
+        final Parameters third = new Parameters("127.0.0.1", 443, "github.com", 80);
+        assertFalse(map.containsKey(third));
+        assertNull(map.get(third));
+    }
+
+}