Adding eid runtime ex test for coverage

src/test/java/pl/wavesoftware/eid/exceptions/EidRuntimeExceptionTest.java

@@ -0,0 +1,43 @@
+package pl.wavesoftware.eid.exceptions;
+
+import org.hamcrest.CoreMatchers;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+import javax.xml.bind.JAXBException;
+import java.util.UnknownFormatConversionException;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.is;
+import static org.junit.internal.matchers.ThrowableMessageMatcher.hasMessage;
+
+/**
+ * @author Krzysztof Suszyński <krzysztof.suszynski@wavesoftware.pl>
+ * @since 2015-10-07
+ */
+@SuppressWarnings("ConstantConditions")
+public class EidRuntimeExceptionTest {
+
+    @Rule
+    public ExpectedException thrown = ExpectedException.none();
+
+    @Test
+    public void testGetMessage() {
+        // then
+        thrown.expect(EidRuntimeException.class);
+        thrown.expectCause(CoreMatchers.<Throwable>instanceOf(JAXBException.class));
+        thrown.expectCause(hasMessage(is((String) null)));
+        thrown.expectMessage(containsString("20151007:212217"));
+        thrown.expectMessage(containsString("javax.xml.bind.JAXBException\n - with linked exception:\n" +
+                "[java.util.UnknownFormatConversionException: Conversion = 'Invalid for unit test']"));
+
+        // given
+        String message = null;
+        Throwable original = new UnknownFormatConversionException("Invalid for unit test");
+        JAXBException cause = new JAXBException(message);
+        cause.setLinkedException(original);
+        throw new EidRuntimeException("20151007:212217", cause);
+    }
+
+}