fix issue #6: equals and compareTo should be implemented in a consistent way

easyrules-core/src/main/java/org/easyrules/core/BasicRule.java

@@ -136,7 +136,7 @@ public class BasicRule implements Rule, Comparable<Rule> {
         if (priority < rule.getPriority()) {
             return -1;
         } else if (priority == rule.getPriority()) {
-            return 0;
+            return name.compareTo(rule.getName());
         } else {
             return 1;
         }

easyrules-core/src/test/java/org/easyrules/core/test/EasyRulesTestSuite.java

@@ -3,6 +3,7 @@ package org.easyrules.core.test;
 import org.easyrules.core.test.annotation.EasyRulesAnnotationTestSuite;
 import org.easyrules.core.test.composite.CompositeRuleTest;
 import org.easyrules.core.test.jmx.JmxRuleRegistrationTest;
+import org.easyrules.core.test.parameters.DefaultRulesEngineTest;
 import org.easyrules.core.test.parameters.RulePriorityComparisonTest;
 import org.easyrules.core.test.parameters.RulePriorityThresholdTest;
 import org.easyrules.core.test.parameters.SkipOnFirstAppliedRuleTest;
@@ -23,7 +24,8 @@ import org.junit.runners.Suite;
         SkipOnFirstAppliedRuleTest.class,
         JmxRuleRegistrationTest.class,
         CompositeRuleTest.class,
-        EasyRulesAnnotationTestSuite.class})
+        EasyRulesAnnotationTestSuite.class,
+        DefaultRulesEngineTest.class})
 public class EasyRulesTestSuite extends TestSuite {
 
 }

easyrules-core/src/test/java/org/easyrules/core/test/parameters/DefaultRulesEngineTest.java

@@ -0,0 +1,53 @@
+package org.easyrules.core.test.parameters;
+
+import org.easyrules.api.Rule;
+import org.easyrules.api.RulesEngine;
+import org.easyrules.core.DefaultRulesEngine;
+import org.easyrules.core.test.SimpleRule;
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Test class for {@link org.easyrules.core.DefaultRulesEngine}.
+ *
+ * @author Mahmoud Ben Hassine (mahmoud@benhassine.fr)
+ */
+public class DefaultRulesEngineTest {
+
+    @Test
+    public void testRulesWithDifferentNameAndDescriptionButWithSamePriority() throws Exception {
+
+        SimpleRule rule1 = new SimpleRule("rule 1", "description 1", 0);
+        SimpleRule rule2 = new SimpleRule("rule 2", "description 2", 0);
+        SimpleRule rule3 = new SimpleRule("rule 3", "description 3", 1);
+
+        RulesEngine<Rule> engine = new DefaultRulesEngine();
+        engine.registerRule(rule1);
+        engine.registerRule(rule2);
+        engine.registerRule(rule3);
+        engine.fireRules();
+
+        assertTrue(rule1.isExecuted());
+        assertTrue(rule2.isExecuted());
+        assertTrue(rule3.isExecuted());
+
+    }
+
+    @Test
+    public void testRulesWithSameNameAndDescriptionAndPriority() throws Exception {
+
+        SimpleRule rule1 = new SimpleRule("rule 1", "description 1", 0);
+        SimpleRule rule2 = new SimpleRule("rule 1", "description 1", 0);
+
+        RulesEngine<Rule> engine = new DefaultRulesEngine();
+        engine.registerRule(rule1);
+        engine.registerRule(rule2);
+        engine.fireRules();
+
+        assertTrue(rule1.isExecuted());
+        assertFalse(rule2.isExecuted());
+
+    }
+}

easyrules-core/src/test/java/org/easyrules/core/test/parameters/RulePriorityComparisonTest.java

@@ -57,7 +57,7 @@ public class RulePriorityComparisonTest {
     @Test
     public void testSameRulePriorityComparison() {
         rule1.setPriority(2);
-        assertEquals(0, rule1.compareTo(rule2));
+        assertEquals(-1, rule1.compareTo(rule2));
     }
 
 }

easyrules-core/src/test/java/org/easyrules/core/test/parameters/RulePriorityThresholdTest.java

@@ -47,10 +47,10 @@ public class RulePriorityThresholdTest {
     @Before
     public void setup(){
 
-        rule1 = new SimpleRule("r1","d1");
+        rule1 = new SimpleRule("r1","d1",1);
-        rule2 = new SimpleRule("r2","d2");
+        rule2 = new SimpleRule("r2","d2",2);
 
-        defaultRulesEngine = new DefaultRulesEngine();
+        defaultRulesEngine = new DefaultRulesEngine(1);
     }
 
     @Test