### Question:
DMNReader extends DMNSerializer { public Pair<TDefinitions, PrefixNamespaceMappings> read(File input) { try { logger.info(String.format("Reading DMN '%s' ...", input.getAbsolutePath())); Pair<TDefinitions, PrefixNamespaceMappings> result = transform(readObject(input)); logger.info("DMN read."); return result; } catch (Exception e) { throw new DMNRuntimeException(String.format("Cannot read DMN from '%s'", input.getAbsolutePath()), e); } } DMNReader(BuildLogger logger, boolean validateSchema); static boolean isDMNFile(File file); List<Pair<TDefinitions, PrefixNamespaceMappings>> readModels(List<File> files); List<Pair<TDefinitions, PrefixNamespaceMappings>> readModels(File file); Pair<TDefinitions, PrefixNamespaceMappings> read(File input); Pair<TDefinitions, PrefixNamespaceMappings> read(InputStream input); Pair<TDefinitions, PrefixNamespaceMappings> read(URL input); Pair<TDefinitions, PrefixNamespaceMappings> read(Reader input); Object readObject(File input); Object readObject(URL input); Object readObject(InputStream input); Object readObject(Reader input); Object readObject(Document doc);  }### Answer:
@Test public void testRead() { File input = new File(resource("dmn/input/test-dmn.dmn")); Pair<TDefinitions, PrefixNamespaceMappings> pair = dmnReader.read(input); TDefinitions definitions = pair.getLeft(); List<JAXBElement<? extends TDRGElement>> drgElementList = definitions.getDrgElement(); assertEquals(1, drgElementList.size()); TDRGElement decision = drgElementList.get(0).getValue(); assertNamedElement(decision, "cip-assessments", "CIP Assessments"); TExpression expression = ((TDecision) decision).getExpression().getValue(); assertTrue(expression instanceof TDecisionTable); TDecisionTable table = (TDecisionTable) expression; assertEquals("decisionTable", table.getId()); List<TInputClause> inputList = table.getInput(); assertEquals(5, inputList.size()); TInputClause firstClause = inputList.get(0); assertDMNElement(firstClause, "input1", "Gender"); TLiteralExpression inputExpression = firstClause.getInputExpression(); String stringType = "string"; String id = "inputExpression1"; String text = "gender"; assertLiteralExpression(inputExpression, stringType, id, text); List<TOutputClause> outputList = table.getOutput(); assertEquals(1, outputList.size()); TOutputClause output = outputList.get(0); assertEquals(stringType, output.getTypeRef()); assertEquals("output1", output.getId()); assertEquals("", output.getName()); List<TDecisionRule> ruleList = table.getRule(); assertEquals(2, ruleList.size()); TDecisionRule firstRule = ruleList.get(0); assertEquals("row-168857152-1", firstRule.getId()); assertNull(firstRule.getLabel()); List<TUnaryTests> inputEntryList = firstRule.getInputEntry(); assertEquals(5, inputEntryList.size()); TUnaryTests firstUnaryTest = inputEntryList.get(0); assertEquals("= \"Female\"", firstUnaryTest.getText()); }