when I have a value such as
x = 0.5771622052130299
and I want to do the following, using spring 3.2 Resutlmatcher :
.andExpect(jsonPath("$.[1].myX").value(myPojo.getMyX()))
where myPojo.getMyX returns a double, the test fails as the json is converted to a BigDecimal, with the error messaeg
java.lang.AssertionError:
For JSON path $.[1].myX type of value expected:
<class java.lang.Double> but was:<class java.math.BigDecimal>
How can I avoid this ?
Use Hamcrest to create a custom matcher which casts to BigDecimal. Here is a tutorial:
Code from an unrelated question may also help.
References
I had the same problem but I could not change the type Hamcrest was using for the JSON value (BigDecimal).
Used this Workaround:
public static final double DEFAULT_PRECISION = 0.000001;
public static Matcher<BigDecimal> closeTo(double value, double precision) {
return BigDecimalCloseTo.closeTo(new BigDecimal(value), new BigDecimal(precision));
}
public static Matcher<BigDecimal> closeTo(double value) {
return closeTo(value, DEFAULT_PRECISION);
}
...
.andExpect(jsonPath("$.values.temperature").value(closeTo(-13.26517)));
I had the same problem with different values where some were parsed as BigDecimal
and some as double
.
So I choose not to use jsonPath, instead I convert the response to the actual object using MappingJackson2HttpMessageConverter
:
public class ControllerTest {
@Autowired
private MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter;
@SuppressWarnings("unchecked")
protected <T> T toObject(MockHttpServletResponse response, Class<T> clazz) throws IOException{
MockClientHttpResponse inputMessage = new MockClientHttpResponse(response.getContentAsByteArray(),
HttpStatus.valueOf(response.getStatus()));
return (T) mappingJackson2HttpMessageConverter.read(clazz, inputMessage);
}
@Test
public test(){
MvcResult result = mockMvc.perform(get("/rest/url")...)
.andExpect(status().isOk())
.andExpect(content().contentType(APPLICATION_JSON_UTF8))
.andReturn();
MyPojoClass pojo = toObject(result.getResponse(), MyPojoClass.class);
assertArrayEquals(new double[]{0.1, 0.2, 0.3}, pojo.getDoubleArray());
}
}
因为它期待一个大十进制......你可以将双精度转换为大十进制
.andExpect(jsonPath("$.[1].myX", is(new BigDecimal(myPojo.getMyX()))))
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