Flip misordered assertEquals parameters. #1555

Fixes `MisorderedAssertEqualsParameters` inspection violation in test code.

Description:
>Reports any calls to JUnit assertEquals() which have a non-literal as the expected result argument and a literal as the actual result argument. Such calls will behave fine for assertions which pass, but may give confusing error reports if their expected and actual arguments differ.

src/test/java/com/puppycrawl/tools/checkstyle/CheckerTest.java

@@ -178,7 +178,7 @@ public class CheckerTest {
         final String[] fileExtensions = {"java", "xml", "properties"};
         c.setFileExtensions(fileExtensions);
         final int counter = c.process(files);
-        assertEquals(counter, 1); // comparing to 1 as there is only one legal file in input
+        assertEquals(1, counter); // comparing to 1 as there is only one legal file in input
     }
 
     @SuppressWarnings("deprecation")

src/test/java/com/puppycrawl/tools/checkstyle/api/JavadocTagInfoTest.java

@@ -303,7 +303,7 @@ public class JavadocTagInfoTest {
 
     @Test
     public void testCoverage() {
-        assertEquals(JavadocTagInfo.VERSION.getType(), JavadocTagInfo.Type.BLOCK);
+        assertEquals(JavadocTagInfo.Type.BLOCK, JavadocTagInfo.VERSION.getType());
 
         assertEquals("text [@version] name [version] type [BLOCK]", JavadocTagInfo.VERSION.toString());
 

src/test/java/com/puppycrawl/tools/checkstyle/checks/UniquePropertiesCheckTest.java

@@ -81,7 +81,7 @@ public class UniquePropertiesCheckTest extends BaseFileSetCheckTestSupport {
         final int stringNumber =
                 UniquePropertiesCheck.getLineNumber(testStrings,
                         "some key");
-        Assert.assertEquals(stringNumber, 0);
+        Assert.assertEquals(0, stringNumber);
     }
 
     /**
@@ -97,12 +97,12 @@ public class UniquePropertiesCheckTest extends BaseFileSetCheckTestSupport {
         final SortedSet<LocalizedMessage> messages =
                 check.process(file, Collections.<String>emptyList());
         Assert.assertEquals("Wrong messages count: " + messages.size(),
-                messages.size(), 1);
+                1, messages.size());
         final LocalizedMessage message = messages.iterator().next();
         final String retrievedMessage = messages.iterator().next().getKey();
         Assert.assertEquals("Message key '" + retrievedMessage
-                + "' is not valid", retrievedMessage,
-                "unable.open.cause");
+                + "' is not valid", "unable.open.cause",
+                retrievedMessage);
         Assert.assertEquals("Message '" + message.getMessage()
                 + "' is not valid", message.getMessage(),
                 getCheckMessage(IO_EXCEPTION_KEY, fileName, getFileNotFoundDetail(file)));

src/test/java/com/puppycrawl/tools/checkstyle/checks/indentation/CommentsIndentationCheckTest.java

@@ -90,7 +90,7 @@ public class CommentsIndentationCheckTest extends BaseCheckTestSupport {
         }
         catch (IllegalArgumentException e) {
             final String msg = e.getMessage();
-            Assert.assertEquals(msg, "Unexpected token type: methodStub");
+            Assert.assertEquals("Unexpected token type: methodStub", msg);
         }
     }
 }