add test case for skipOnFirstApplied rule parameter

easyrules-core/src/test/java/io/github/io/github/benas/easyrules/core/SimpleRule.java

@@ -0,0 +1,35 @@
+package io.github.io.github.benas.easyrules.core;
+
+import io.github.benas.easyrules.core.BasicRule;
+
+/**
+ * Simple rule class used for tests.
+ * 
+ * @author Mahmoud Ben Hassine (md.benhassine@gmail.com)
+ */
+public class SimpleRule extends BasicRule {
+
+    /**
+     * Has the rule been executed? .
+     */
+    protected boolean executed;
+
+    public SimpleRule(String name, String description, int priority) {
+        super(name, description, priority);
+    }
+
+    @Override
+    public boolean evaluateConditions() {
+        return true;
+    }
+
+    @Override
+    public void performActions() throws Exception {
+        executed = true;
+    }
+
+    public boolean isExecuted() {
+        return executed;
+    }
+
+}

easyrules-core/src/test/java/io/github/io/github/benas/easyrules/core/SimpleRuleThatThrowsException.java

@@ -0,0 +1,19 @@
+package io.github.io.github.benas.easyrules.core;
+
+/**
+ * Simple rule class used for tests.
+ * 
+ * @author Mahmoud Ben Hassine (md.benhassine@gmail.com)
+ */
+public class SimpleRuleThatThrowsException extends SimpleRule {
+
+    public SimpleRuleThatThrowsException(String name, String description, int priority) {
+        super(name, description, priority);
+    }
+
+    @Override
+    public void performActions() throws Exception {
+        throw new Exception("An exception occurred in SimpleRuleThatThrowsException.performActions");
+    }
+
+}

easyrules-core/src/test/java/io/github/io/github/benas/easyrules/core/SkipOnFirstAppliedRuleTest.java

@@ -0,0 +1,94 @@
+/*
+ * The MIT License
+ *
+ *  Copyright (c) 2014, Mahmoud Ben Hassine (md.benhassine@gmail.com)
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in
+ *  all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ *  THE SOFTWARE.
+ */
+
+package io.github.io.github.benas.easyrules.core;
+
+import io.github.benas.easyrules.api.RulesEngine;
+import io.github.benas.easyrules.core.DefaultRulesEngine;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Test class of "skip on first applied rule" parameter of Easy Rules default engine.
+ *
+ * @author Mahmoud Ben Hassine (md.benhassine@gmail.com)
+ */
+public class SkipOnFirstAppliedRuleTest {
+
+    private SimpleRule rule1, rule2;
+
+    private SimpleRuleThatThrowsException rule0;
+
+    private RulesEngine rulesEngine;
+
+    @Before
+    public void setup(){
+
+        rule1 = new SimpleRule("r1","d1",1);
+        rule2 = new SimpleRule("r2","d2",2);
+
+        rule0 = new SimpleRuleThatThrowsException("r0","d0",0);
+
+        rulesEngine = new DefaultRulesEngine();
+    }
+
+    @Test
+    public void testSkipOnFirstAppliedRule() {
+
+        rulesEngine.setSkipOnFirstAppliedRule(true);
+        rulesEngine.registerRule(rule1);
+        rulesEngine.registerRule(rule2);
+
+        rulesEngine.fireRules();
+
+        //Rule 1 should be executed
+        assertEquals(true, rule1.isExecuted());
+
+        //Rule 2 should be skipped since Rule 1 has been executed
+        assertEquals(false, rule2.isExecuted());
+
+    }
+
+    @Test
+    public void testSkipOnFirstAppliedRuleWithException() {
+
+        rulesEngine.setSkipOnFirstAppliedRule(true);
+        rulesEngine.registerRule(rule0);
+        rulesEngine.registerRule(rule1);
+
+        rulesEngine.fireRules();
+
+        //If an exception occurs when executing Rule 0, Rule 1 should still be applied
+
+        //Rule 0 should throw an exception, hence not executed
+        assertEquals(false, rule0.isExecuted());
+
+        //Rule 1 should be applied since there is no "firstAppliedRule" yet (Rule 0 has not been applied)
+        assertEquals(true, rule1.isExecuted());
+
+    }
+
+}