Question

我正在使用框架Olingo用Java语言实现尊重OData标准版本4的Web服务。我需要自定义$filter的响应。我已经实现了一个访客as documented in the quick start。我需要实施一个集成测试，以尝试使用另一种语法，并防止将来维护时出现回归错误。

对于V2，我发现了the following tutorial和以下代码：

@Test
public void printExpressionWithProperty() throws Exception {
  //Use a mocked edmProvider for this tutorial
  TestEdmProvider provider = new TestEdmProvider();
  Edm edm = RuntimeDelegate.createEdm(provider);
  EdmEntityType entityType = edm.getEntityType(TestEdmProvider.NAMESPACE_1, TestEdmProvider.ENTITY_TYPE_1_1.getName());

  String rawExpression = "EmployeeId eq '1'";
  FilterExpression expression = UriParser.parseFilter (null, entityType, rawExpression);
  String whereClause = (String) expression.accept(new JdbcSimpleStringVisitor());
  System.out.println("Raw: " + rawExpression + " ------> Whereclause: " + whereClause);
  System.out.println();
}

不幸的是，UriParser.parseFilter在v4中不存在。

我尝试过：

public class MyVisitorTest {

    private final FullQualifiedName NAME1 = new FullQualifiedName("testNamespace1", "myfield");
    private final OData odata = OData.newInstance();

    public EdmEntityType createEntityType(final FullQualifiedName fqn) {
        if (NAME1.equals(fqn)) {
            EdmEntityType entityType = mock(EdmEntityType.class);
            when(entityType.getNamespace()).thenReturn(fqn.getNamespace());
            when(entityType.getName()).thenReturn(fqn.getName());
            return entityType;
        }
        return null;
    }


    private Expression parseExpression(final String expressionString)
            throws UriParserException, UriValidationException {

        UriTokenizer tokenizer = new UriTokenizer(expressionString);

        EdmEntityType entityType = createEntityType(NAME1);

        Edm edm = mock(Edm.class);
        when(edm.getEntityType(NAME1)).thenReturn(entityType);

        final Expression expression = new ExpressionParser(edm, odata).parse(tokenizer, null, null, null);
        assertNotNull(expression);
        assertTrue(tokenizer.next(UriTokenizer.TokenKind.EOF));
        return expression;
    }

    @Test
    public void simpleTest() throws UriParserException, UriValidationException, ODataApplicationException, ExpressionVisitException {

        String exp = "myfield gt 2019-01-01T00:00:00Z";
        Expression e = parseExpression(exp);

        MyVisitor myVisitor = new MyVisitor();
        String result = (String) e.accept(startEndMeasureVisitor);
        assertEquals(result.toString(), "MyResult");
    }
}

它不起作用，它向我发送以下消息：

属性路径必须遵循结构化类型。

因此，我正在寻找使我的单元测试生效的想法，或者您是否有可以分享的工作示例...

Answer 1

关于单元测试，我将集中精力分别测试每种过滤器方法。就像visitBinaryOperator根据输入返回期望值，依此类推。

我不是事物命名专家，但是我将您的测试称为集成测试。在这里，我将重点介绍测试内部准备的测试FilterOption。在您的原始应用中，Apache Olingo将创建此FilterOption，并且这部分（应该）应在Olingo中进行测试。

使用Apache Olingo时，我经常提到its repository，尤其是 server-test 和 server-tecsvc 。验证在Olingo本身中如何进行测试。

我建议您看一下FilterValidator，因为它可能对您的集成测试有用。

Answer 2

在这里，我们要感谢原型的跟踪功能（对遗留代码非常有用），我有了parseExpression方法的新版本。

class A implements EdmStructuredType, EdmPrimitiveType {

    @Override
    public boolean isCompatible(EdmPrimitiveType edmPrimitiveType) {
        return false;
    }

    @Override
    public Class<?> getDefaultType() {
        return null;
    }

    @Override
    public boolean validate(String s, Boolean aBoolean, Integer integer, Integer integer1, Integer integer2, Boolean aBoolean1) {
        return false;
    }

    @Override
    public <T> T valueOfString(String s, Boolean aBoolean, Integer integer, Integer integer1, Integer integer2, Boolean aBoolean1, Class<T> aClass) throws EdmPrimitiveTypeException {
        return null;
    }

    @Override
    public String valueToString(Object o, Boolean aBoolean, Integer integer, Integer integer1, Integer integer2, Boolean aBoolean1) throws EdmPrimitiveTypeException {
        return null;
    }

    @Override
    public String toUriLiteral(String s) {
        return null;
    }

    @Override
    public String fromUriLiteral(String s) throws EdmPrimitiveTypeException {
        return null;
    }

    @Override
    public EdmElement getProperty(String s) {
        return null;
    }

    @Override
    public List<String> getPropertyNames() {
        return null;
    }

    @Override
    public EdmProperty getStructuralProperty(String s) {
        return null;
    }

    @Override
    public EdmNavigationProperty getNavigationProperty(String s) {
        return null;
    }

    @Override
    public List<String> getNavigationPropertyNames() {
        return null;
    }

    @Override
    public EdmStructuredType getBaseType() {
        return null;
    }

    @Override
    public boolean compatibleTo(EdmType edmType) {
        return false;
    }

    @Override
    public boolean isOpenType() {
        return false;
    }

    @Override
    public boolean isAbstract() {
        return false;
    }

    @Override
    public EdmAnnotation getAnnotation(EdmTerm edmTerm, String s) {
        return null;
    }

    @Override
    public List<EdmAnnotation> getAnnotations() {
        return null;
    }

    @Override
    public FullQualifiedName getFullQualifiedName() {
        return null;
    }

    @Override
    public String getNamespace() {
        return null;
    }

    @Override
    public EdmTypeKind getKind() {
        return null;
    }

    @Override
    public String getName() {
        return null;
    }
}


private Expression parseExpression(final String expressionString)
        throws UriParserException, UriValidationException {

    UriTokenizer tokenizer = new UriTokenizer(expressionString);

    Edm edm = mock(A.class, withSettings().defaultAnswer(RETURNS_SMART_NULLS));
    EdmProperty employeeIdTypeEdmElement = mock(EdmProperty.class, RETURNS_SMART_NULLS);

    when(edmType.getProperty("EmployeeId")).thenReturn(measureTypeEdmElement);

    when(edmType.getKind()).thenReturn(EdmTypeKind.PRIMITIVE);
    when(edmType.isCompatible(new EdmDate())).thenReturn(true);

    when(employeeIdTypeEdmElement.getName()).thenReturn("EmployeeId");
    when(employeeIdTypeEdmElement.getType()).thenReturn(edmType);
    when(employeeIdTypeEdmElement.isCollection()).thenReturn(false);


    final Expression expression = new ExpressionParser(edm, odata).parse(tokenizer, edmType, null, null);
    assertNotNull(expression);
    assertTrue(tokenizer.next(UriTokenizer.TokenKind.EOF));
    return expression;
}

万一它可以帮助某人，也许可以对其进行优化，并提出自己的建议。

使用Olingo / ODATA 4编写ExpressionVisitor的集成测试

2 个答案: