Added test target

.travis.yml

@@ -0,0 +1 @@
+language: java

build.xml

@@ -3,15 +3,49 @@
 <project name="DiscountStrategy" default="compile">
   <property name="blddir" location="build" />
   <property name="classdir" location="${blddir}/classes" />
+  <property name="jardir" location="${blddir}/jar" />
 
-  <target name="init">
+  <path id="junit.class.path">
+    <pathelement location="lib/junit.jar" />
+    <pathelement location="${classdir}" />
+  </path>
+
+  <target name="init" depends="clean">
     <mkdir dir="${blddir}" />
     <mkdir dir="${classdir}" />
   </target>
 
   <target name="compile" depends="init">
-    <javac
-      srcdir="src"
-      destdir="${classdir}" />
+    <javac srcdir="src" destdir="${classdir}">
+      <classpath refid="junit.class.path" />
+    </javac>
+  </target>
+
+  <target name="link" depends="compile">
+    <mkdir dir="${jardir}" />
+    <jar destfile="${jardir}/DiscountStrategy.jar" basedir="${classdir}">
+      <manifest>
+        <attribute name="Main-Class" value="Demo" />
+      </manifest>
+    </jar>
+  </target>
+
+  <target name="check" depends="compile">
+    <junit printsummary="yes" haltonfailure="yes">
+
+      <classpath refid="junit.class.path" />
+      <formatter type="brief" usefile="no" />
+      <test name="DiscountStrategyTest"
+        haltonfailure="no" outfile="result" />
+
+    </junit>
+
+  </target>
+
+  <target name="test" depends="check" />
+
+  <target name="clean">
+    <echo message="Deleting build/" />
+    <delete dir="${blddir}" />
   </target>
 </project>

build.xml~

@@ -0,0 +1,49 @@
+<?xml version="1.0"?>
+
+<project name="DiscountStrategy" default="compile">
+  <property name="blddir" location="build" />
+  <property name="classdir" location="${blddir}/classes" />
+  <property name="jardir" location="${blddir}/jar" />
+
+  <path id="junit.class.path">
+    <pathelement location="lib/junit.jar" />
+    <pathelement location="${classdir}" />
+  </path>
+
+  <target name="init">
+    <mkdir dir="${blddir}" />
+    <mkdir dir="${classdir}" />
+  </target>
+
+  <target name="compile" depends="init">
+    <javac srcdir="src" destdir="${classdir}">
+      <classpath refid="junit.class.path" />
+    </javac>
+  </target>
+
+  <target name="link" depends="compile">
+    <mkdir dir="${jardir}" />
+    <jar destfile="${jardir}/DiscountStrategy.jar" basedir="${classdir}">
+      <manifest>
+        <attribute name="Main-Class" value="Demo" />
+      </manifest>
+    </jar>
+  </target>
+
+  <target name="check" depends="compile">
+    <junit printsummary="yes" haltonfailure="yes">
+
+      <classpath refid="junit.class.path" />
+
+      <test name="DiscountStrategyTest"
+        haltonfailure="no" outfile="result" />
+
+    </junit>
+
+  </target>
+
+  <target name="clean">
+    <echo message="Deleting build/" />
+    <delete dir="${blddir}" />
+  </target>
+</project>

src/DiscountStrategyTest.java

@@ -0,0 +1,55 @@
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import junit.framework.TestCase;
+
+
+public class DiscountStrategyTest extends TestCase {
+
+	private DiscountStrategy dS;
+	private Order testOrder = new Order("Customer", (float) 100.0);
+
+	@Before
+	protected void setUp() throws Exception {
+		super.setUp();
+	}
+
+	@After
+	protected void tearDown() throws Exception {
+		super.tearDown();
+	}
+
+	@Test
+	public void testPercentDiscount() {
+		dS = new PercentDiscountStrategy(50);
+		assertEquals(testOrder.getPrice()/(float) 2, dS.applyDiscount(testOrder));
+
+		dS = new PercentDiscountStrategy(100);
+		assertEquals((float) 0, dS.applyDiscount(testOrder));
+
+		dS = new PercentDiscountStrategy(0);
+		assertEquals(testOrder.getPrice(), dS.applyDiscount(testOrder));
+	}
+
+	@Test
+	public void testRandomDiscount() {
+		for (int i = 0; i < 100; i++) {
+			dS = new RandomDiscountStrategy();
+			assertTrue(testOrder.getPrice() > dS.applyDiscount(testOrder));
+			assertTrue(dS.applyDiscount(testOrder) > 0);
+		}
+	}
+
+	@Test
+	public void testCreditDiscount() {
+		dS = new StoreCreditDiscountStrategy(0);
+		assertEquals(testOrder.getPrice(), dS.applyDiscount(testOrder));
+
+		dS = new StoreCreditDiscountStrategy(1);
+		assertEquals(testOrder.getPrice() - (float) 1, dS.applyDiscount(testOrder));
+
+		dS = new StoreCreditDiscountStrategy(100);
+		assertEquals(testOrder.getPrice() - (float) 100, dS.applyDiscount(testOrder));
+	}
+}