Fixing an incorrect assumption in one of the tests and updating the travis yaml file.

Author: littleclay

.travis.yml

@@ -1,14 +1,6 @@
 sudo: false
 language: java
 
-jdk:
-  - oraclejdk8
-
-addons:
-  apt:
-    packages:
-      - oracle-java8-installer
-
 install:
   - mvn clean install -DskipTests
 script:
@@ -20,4 +12,3 @@ notifications:
 branches:
   only:
     - master
-

README.md

@@ -16,7 +16,7 @@ For instance, if you write a new class that overrides the `equals` method but fo
 <dependency>
     <groupId>com.redfin</groupId>
     <artifactId>contractual</artifactId>
-    <version>2.1.0</version>
+    <version>2.1.1</version>
     <scope>test</scope>
 </dependency>
 ```

pom.xml

@@ -8,7 +8,7 @@
 
     <groupId>com.redfin</groupId>
     <artifactId>contractual</artifactId>
-    <version>2.1.0</version>
+    <version>2.1.1</version>
     <modelVersion>4.0.0</modelVersion>
     <packaging>jar</packaging>
 

src/main/java/com/redfin/contractual/EqualsContract.java

@@ -34,48 +34,8 @@
  * <br>
  * Note that the equals method is not friendly with regards to inheritance.
  * This contract makes a best effort to ensure the equality contracts with
- * regards to other instances of the same class but cannot ensure it up or
- * down the inheritance hierarchy. An example that breaks the symmetrical
- * portion of the equality contract in a way unable to be tested by this test
- * contract:
- * <br>
- * <pre>
- *     <code>
- * public class A {
- *     private final int i;
- *
- *     public A(int i) {
- *         this.i = i;
- *     }
- *
- *     {@literal @}Override
- *     public boolean equals(Object obj) {
- *         return obj instanceof A {@literal &&} i == ((A) obj).i;
- *     }
- * }
- *
- * public class B extends A {
- *     private final int i;
- *
- *     public B(int i, int j) {
- *         super(i);
- *         this.j = j;
- *     }
- *
- *     {@literal @}Override
- *     public boolean equals(Object obj) {
- *         return obj instanceof B {@literal &&} super.equals(obj) {@literal &&} j == ((B) obj).j;
- *     }
- * }
- *
- * public void testSymmetricEquality() {
- *     A a = new A(1);
- *     B b = new B(1, 2);
- *     a.equals(b); // true
- *     b.equals(a); // false
- * }
- *     </code>
- * </pre>
+ * regards to other instances of the same class but cannot ensure it if
+ * superclasses break one or more of the equality contracts.
  *
  * @param <T> the class that is being tested.
  */
@@ -188,7 +148,7 @@ default void testSymmetryOfEqualObjects() {
                  .isNotNull();
         assumes().withMessage("This test requires that 'a' be equal to 'b'")
                  .that(a)
-                 .isNotEqualTo(b);
+                 .isEqualTo(b);
         assumes().withMessage("This test requires that 'a' and 'b' be different instances")
                  .that(a == b)
                  .isFalse();