Add a Link unit test.

src/com/dmdirc/util/text/Link.java

@@ -68,17 +68,13 @@ public class Link {
 
     @Override
     public boolean equals(final Object o) {
-        if (this == o) {
-            return true;
+        if (o instanceof Link) {
+            final Link link = (Link) o;
+            return end == link.getEnd()
+                    && start == link.getStart()
+                    && Objects.equals(content, link.getContent());
         }
-
-        if (o == null || getClass() != o.getClass()) {
-            return false;
-        }
-
-        final Link link = (Link) o;
-        return end == link.getEnd() && start == link.getStart()
-                && Objects.equals(content, link.getContent());
+        return false;
     }
 
     @Override

test/com/dmdirc/util/text/LinkTest.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2006-2015 DMDirc Developers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc.util.text;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.runners.MockitoJUnitRunner;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+
+@RunWith(MockitoJUnitRunner.class)
+public class LinkTest {
+
+    private Link instance;
+
+    @Before
+    public void setUp() throws Exception {
+        instance = new Link(5, 10, "rarrarrarrar");
+    }
+
+    @Test
+    public void testGetStart() throws Exception {
+        assertEquals(5, instance.getStart());
+    }
+
+    @Test
+    public void testGetEnd() throws Exception {
+        assertEquals(10, instance.getEnd());
+    }
+
+    @Test
+    public void testGetContent() throws Exception {
+        assertEquals("rarrarrarrar", instance.getContent());
+    }
+
+    @Test
+    public void testEquals_Equals() throws Exception {
+        assertEquals(new Link(5, 10, "rarrarrarrar"), instance);
+    }
+
+    @Test
+    public void testEquals_NotEquals() throws Exception {
+        assertNotEquals(new Link(1, 5, "rarrarrarrar"), instance);
+    }
+
+    @Test
+    public void testEquals_DifferentType() throws Exception {
+        assertNotEquals("RAR", instance);
+    }
+}