add tests for IOExceptionUnchecked

SVN: 22375

base/sourceTest/java/exceptions/IOExceptionUncheckedTests.java

+/*
+ * Copyright 2011 ETH Zuerich, CISD
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package exceptions;
+
+import static org.testng.AssertJUnit.*;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+import org.testng.annotations.Test;
+
+import ch.systemsx.cisd.base.exceptions.CheckedExceptionTunnel;
+import ch.systemsx.cisd.base.exceptions.IOExceptionUnchecked;
+
+/**
+ * Test cases for {@link IOExceptionUnchecked}.
+ *
+ * @author Bernd Rinn
+ */
+public class IOExceptionUncheckedTests
+{
+    private void generateFileNotFoundException() throws IOExceptionUnchecked
+    {
+        try
+        {
+            new FileInputStream(new File("doesnt.exist"));
+        } catch (IOException ex)
+        {
+            throw CheckedExceptionTunnel.wrapIfNecessary(ex);
+        }
+    }
+    
+    @Test
+    public void testWrapUnwrapIOException()
+    {
+        try
+        {
+            generateFileNotFoundException();
+            fail("No IOException thrown");
+        } catch (IOExceptionUnchecked e)
+        {
+            final Exception ex = CheckedExceptionTunnel.unwrapIfNecessary(e);
+            assertTrue(ex instanceof FileNotFoundException);
+            assertEquals("doesnt.exist (No such file or directory)", ex.getMessage());
+        }
+    }
+    
+    @Test
+    public void testWrapUnwrapNonIOException()
+    {
+        try
+        {
+            throw new IOExceptionUnchecked(new IllegalStateException("Don't like this state"));
+        } catch (CheckedExceptionTunnel e)
+        {
+            final Exception ex = CheckedExceptionTunnel.unwrapIfNecessary(e);
+            assertTrue(ex instanceof IOException);
+            assertEquals("IllegalStateException: Don't like this state", ex.getMessage());
+            assertNotNull(ex.getCause());
+            assertTrue(ex.getCause() instanceof IllegalStateException);
+            assertEquals("Don't like this state", ex.getCause().getMessage());
+        }
+    }
+
+    @Test
+    public void testWrapUnwrapIOExceptionGivingMsg()
+    {
+        try
+        {
+            throw new IOExceptionUnchecked("Some message");
+        } catch (CheckedExceptionTunnel e)
+        {
+            final Exception ex = CheckedExceptionTunnel.unwrapIfNecessary(e);
+            assertTrue(ex instanceof IOException);
+            assertEquals("Some message", ex.getMessage());
+            assertNull(ex.getCause());
+        }
+    }
+
+}