我不确定我是否错误地使用了 JMockit,或者我的设置有问题。我在 Eclipse 中使用 JMockit 1.32 和 JUnit 4.12。
我的问题似乎是没有捕获接口。具体在java.sql
包里。例如:
public class Dto {
private int id;
public Dto(){}
public Dto(ResultSet rs) {
try {
id = rs.getInt(1);
} catch (SQLException e) { }
}
public int getId() {return id;}
void setId(int id) {this.id = id;}
}
.
public class ClassUnderTest {
public static Dto loadObject(Connection conn, String tablename, int id) {
Dto result = null;
ResultSet rs = null;
PreparedStatement ps = null;
try {
String sql = "select * from " + tablename + " where id = ?";
ps = conn.prepareStatement(sql);
ps.setInt(1, id);
rs = ps.executeQuery();
if (rs.next()) {
result = new Dto(rs);
}
} catch (SQLException e) {
} finally {
try {
if (ps != null) ps.close();
} catch (SQLException e) { }
}
return result;
}
}
.
public class ResultSetTest extends junit.framework.TestCase {
private static final int OBJ_ID = 5;
@Capturing
ResultSet mockResultSet;
@Capturing
PreparedStatement mockStatement;
@Capturing
Connection mockConn;
@Test
public void testGetDtoById() throws SQLException {
new Expectations() {{
mockConn.prepareStatement(anyString); result = mockStatement;
mockStatement.setInt(anyInt, OBJ_ID);
mockResultSet.next(); result = true;
new Dto(mockResultSet); result = new Dto();
mockResultSet.next(); result = true;
}};
Dto dto = ClassUnderTest.loadObject(mockConn, "", OBJ_ID);
assertEquals(dto.getId(), OBJ_ID);
}
}
在此设置中,测试执行失败并在Expectations(){}
块的第一行出现 NPE。但是从教程等中,我期望已经创建了一个模拟实例。(例如教程)
试图超越这一点,我创建了明确的模拟类,如下所示:
public class ResultSetMockup extends MockUp<ResultSet> { }
public class PreparedStatementMockup extends MockUp<PreparedStatement>
{
@Mock ResultSet executeQuery() {return new ResultSetMockup().getMockInstance();}
}
public class ConnectionMockup extends MockUp<Connection>
{
@Mock PreparedStatement prepareStatement(String sql) throws SQLException {
return new PreparedStatementMockup().getMockInstance();
}
}
@Capturing
ResultSet mockResultSet = new ResultSetMockup().getMockInstance();
@Capturing
PreparedStatement mockStatement = new PreparedStatementMockup().getMockInstance();
@Capturing
Connection mockConn = new ConnectionMockup().getMockInstance();
在这一点上,Expectations() {}
块是快乐的,但似乎results
从未真正被设置。通过设置断点,我发现rs.next()
总是失败。所以我认为实际上没有任何东西被捕获。
我究竟做错了什么?还是我的设置中的某些东西阻止了 JMockit 实际运行?