CSV-242 CSVFormat equals() and hash() don't use all fields

Fix equals()
TODO fix hash()

Author: sebbASF

src/main/java/org/apache/commons/csv/CSVFormat.java

@@ -809,6 +809,24 @@ public boolean equals(final Object obj) {
         if (delimiter != other.delimiter) {
             return false;
         }
+        if (trailingDelimiter != other.trailingDelimiter) {
+            return false;
+        }
+        if (autoFlush != other.autoFlush) {
+            return false;
+        }
+        if (trim != other.trim) {
+            return false;
+        }
+        if (allowMissingColumnNames != other.allowMissingColumnNames) {
+            return false;
+        }
+        if (allowDuplicateHeaderNames != other.allowDuplicateHeaderNames) {
+            return false;
+        }
+        if (ignoreHeaderCase != other.ignoreHeaderCase) {
+            return false;
+        }
         if (quoteMode != other.quoteMode) {
             return false;
         }
@@ -859,6 +877,9 @@ public boolean equals(final Object obj) {
         } else if (!recordSeparator.equals(other.recordSeparator)) {
             return false;
         }
+        if (!Arrays.equals(headerComments, other.headerComments)) {
+            return false;
+        }
         return true;
     }
 

src/test/java/org/apache/commons/csv/CSVFormatTest.java

@@ -34,6 +34,8 @@
 import java.io.ByteArrayOutputStream;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
 import java.util.Arrays;
 
 import org.junit.Assert;
@@ -1108,4 +1110,58 @@ public void testWithSystemRecordSeparator() throws Exception {
         assertEquals(System.getProperty("line.separator"), formatWithRecordSeparator.getRecordSeparator());
     }
 
+    private void assertNotEquals(String name, String type, Object left, Object right) {
+        if (left.equals(right) || right.equals(left)) {
+            System.out.println("Should not be equal for " + name + "(" + type + ")");
+        }
+    }
+
+    @Test
+    public void testEqualsHash() throws Exception {
+        Method[] methods = CSVFormat.class.getDeclaredMethods();
+        for (Method method : methods) {
+            if (Modifier.isPublic(method.getModifiers())) {
+               final String name = method.getName();
+               if (name.startsWith("with")) {
+                   for (Class<?> cls : method.getParameterTypes()) {
+                       final String type = cls.getCanonicalName();
+                       if ("boolean".equals(type)) {
+                           final Object defTrue = method.invoke(CSVFormat.DEFAULT, new Object[] {Boolean.TRUE});
+                           final Object defFalse = method.invoke(CSVFormat.DEFAULT, new Object[] {Boolean.FALSE});
+                           assertNotEquals(name, type ,defTrue, defFalse);
+                       } else if ("char".equals(type)){
+                           final Object a = method.invoke(CSVFormat.DEFAULT, new Object[] {'a'});
+                           final Object b = method.invoke(CSVFormat.DEFAULT, new Object[] {'b'});
+                           assertNotEquals(name, type, a, b);
+                       } else if ("java.lang.Character".equals(type)){
+                           final Object a = method.invoke(CSVFormat.DEFAULT, new Object[] {null});
+                           final Object b = method.invoke(CSVFormat.DEFAULT, new Object[] {new Character('d')});
+                           assertNotEquals(name, type, a, b);
+                       } else if ("java.lang.String".equals(type)){
+                           final Object a = method.invoke(CSVFormat.DEFAULT, new Object[] {null});
+                           final Object b = method.invoke(CSVFormat.DEFAULT, new Object[] {"e"});
+                           assertNotEquals(name, type, a, b);
+                       } else if ("java.lang.String[]".equals(type)){
+                           final Object a = method.invoke(CSVFormat.DEFAULT, new Object[] {new String[] {null, null}});
+                           final Object b = method.invoke(CSVFormat.DEFAULT, new Object[] {new String[] {"f", "g"}});
+                           assertNotEquals(name, type, a, b);
+                       } else if ("org.apache.commons.csv.QuoteMode".equals(type)){
+                           final Object a = method.invoke(CSVFormat.DEFAULT, new Object[] {QuoteMode.MINIMAL});
+                           final Object b = method.invoke(CSVFormat.DEFAULT, new Object[] {QuoteMode.ALL});
+                           assertNotEquals(name, type, a, b);
+                       } else if ("java.lang.Object[]".equals(type)){
+                           final Object a = method.invoke(CSVFormat.DEFAULT, new Object[] {new Object[] {null, null}});
+                           final Object b = method.invoke(CSVFormat.DEFAULT, new Object[] {new Object[] {new Object(), new Object()}});
+                           assertNotEquals(name, type, a, b);
+                       } else if ("withHeader".equals(name)){ // covered above by String[]
+                           // ignored
+                       } else {
+                           fail("Unhandled method: "+name + "(" + type + ")");
+                       }
+                   }
+               }
+            }
+         }   
+    }
+    
 }