SimpleInjector Unit test

Change-Id: Ic73c78ad63bfbc2fcdef87c6c7cab70ab85a3131
Reviewed-on: http://gerrit.dmdirc.com/2447
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

test/com/dmdirc/util/SimpleInjectorTest.java

@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2006-2012 DMDirc Developers
+ *
+ * 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 com.dmdirc.util;
+
+import java.io.Serializable;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class SimpleInjectorTest {
+
+    @Test
+    public void testNoParams() {
+        SimpleInjector instance = new SimpleInjector();
+        assertTrue(instance.getParameters().isEmpty());
+    }
+
+    @Test
+    public void testAddParams() {
+        final Object object = new Object();
+        SimpleInjector instance = new SimpleInjector();
+        instance.addParameter(Object.class, object);
+        assertEquals(1, instance.getParameters().size());
+    }
+
+    @Test
+    public void testAddObjectsParams() {
+        final TestObject object = new TestObject("");
+        SimpleInjector instance = new SimpleInjector();
+        instance.addParameter(object);
+        assertEquals(3, instance.getParameters().size());
+    }
+
+    @Test
+    public void testParentsParams() {
+        final Object object = new Object();
+        SimpleInjector parent = new SimpleInjector();
+        parent.addParameter(Object.class, object);
+        SimpleInjector child = new SimpleInjector(parent);
+        assertEquals(1, child.getParameters().size());
+    }
+
+    @Test
+    public void testCreateInstanceNoParams() {
+        SimpleInjector instance = new SimpleInjector();
+        final Object result = instance.createInstance(Object.class);
+        assertNotNull(result);
+    }
+
+    @Test
+    public void testCreateInstanceParams() {
+        SimpleInjector instance = new SimpleInjector();
+        instance.addParameter(String.class, "test");
+        instance.addParameter(SimpleInjectorTest.class, this);
+        final TestObject result = instance.createInstance(TestObject.class);
+        assertNotNull(result);
+    }
+
+    @Test(expected=IllegalArgumentException.class)
+    public void testCreateUnsatisfiedConstructor() {
+        SimpleInjector instance = new SimpleInjector();
+        final Object result = instance.createInstance(TestObject.class);
+        assertNull(result);
+    }
+
+    @Test(expected=IllegalArgumentException.class)
+    public void testCreatePrivateConstructor() {
+        SimpleInjector instance = new SimpleInjector();
+        instance.addParameter(String.class, "");
+        final Object result = instance.createInstance(PrivateObject.class);
+        assertNull(result);
+    }
+
+    @Test(expected=IllegalArgumentException.class)
+    public void testCreateExceptionConstructor() {
+        SimpleInjector instance = new SimpleInjector();
+        instance.addParameter(String.class, "");
+        instance.addParameter(SimpleInjectorTest.class, this);
+        final Object result = instance.createInstance(ExceptionObject.class);
+        assertNull(result);
+    }
+
+    class TestObject implements Serializable {
+
+        public TestObject(final String test) {
+        }
+    }
+
+    class PrivateObject implements Serializable {
+
+        private PrivateObject() {
+        }
+    }
+
+    class ExceptionObject implements Serializable {
+
+        public ExceptionObject() {
+            throw new IndexOutOfBoundsException();
+        }
+    }
+}