Tidy a couple of tests.

Change-Id: I11b3c8aa740b6a70a58190c75070045b1cbcd3ca
Reviewed-on: http://gerrit.dmdirc.com/3917
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

test/com/dmdirc/actions/ActionComparisonNamesTest.java

 @RunWith(Parameterized.class)
 public class ActionComparisonNamesTest {
 
-    private ActionComparison comparison;
+    private final ActionComparison comparison;
 
     public ActionComparisonNamesTest(final ActionComparison comparison) {
         this.comparison = comparison;

test/com/dmdirc/actions/StringComponentsTest.java

 @RunWith(Parameterized.class)
 public class StringComponentsTest {
 
-    private String string1, string2;
+    private final String string1;
+    private final String string2;
 
     public StringComponentsTest(final String string1, final String string2) {
         this.string1 = string1;
 
     @Test
     public void testContains() {
-        assertEquals(string1.indexOf(string2) != -1,
+        assertEquals(string1.contains(string2),
                 CoreActionComparison.STRING_CONTAINS.test(string1, string2));
     }
 
     @Test
     public void testNotContains() {
-        assertEquals(string1.indexOf(string2) == -1,
+        assertEquals(!string1.contains(string2),
                 CoreActionComparison.STRING_NCONTAINS.test(string1, string2));
     }