Add simple tests for delegate pattern #324

delegation/src/test/java/com/iluwatar/delegation/simple/DelegateTest.java

@@ -0,0 +1,43 @@
+package com.iluwatar.delegation.simple;
+
+import com.iluwatar.delegation.simple.printers.CanonPrinter;
+import com.iluwatar.delegation.simple.printers.EpsonPrinter;
+import com.iluwatar.delegation.simple.printers.HPPrinter;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.contrib.java.lang.system.SystemOutRule;
+
+import static org.junit.Assert.assertEquals;
+
+public class DelegateTest {
+
+    private static final String MESSAGE = "Test Message Printed";
+
+    @Rule
+    public final SystemOutRule systemOutRule = new SystemOutRule().enableLog();
+
+    @Test
+    public void testCanonPrinter() throws Exception {
+        AbstractPrinterController abstractController = new PrinterController(new CanonPrinter());
+        abstractController.print(MESSAGE);
+
+        assertEquals("Canon Printer : Test Message Printed\n", systemOutRule.getLog());
+    }
+
+    @Test
+    public void testHPPrinter() throws Exception {
+        AbstractPrinterController abstractController = new PrinterController(new HPPrinter());
+        abstractController.print(MESSAGE);
+
+        assertEquals("HP Printer : Test Message Printed\n", systemOutRule.getLog());
+    }
+
+    @Test
+    public void testEpsonPrinter() throws Exception {
+        AbstractPrinterController abstractController = new PrinterController(new EpsonPrinter());
+        abstractController.print(MESSAGE);
+
+        assertEquals("Epson Printer : Test Message Printed\n", systemOutRule.getLog());
+    }
+
+}