我正在用MockMvc做一些测试,我想验证JSON响应的结构.具体来说,我想确保属性键存在,并且值是某种类型或null.
I'm doing some tests with MockMvc, and I want to validate the structure of a JSON response. Specifically, I want to make sure that the key to an attribute exists, and that the value is of a certain type or null.
{ "keyToNull": null, # This may be null, or a String "keyToString": "some value" }以下内容对我有用,但我想知道是否有一种方法可以将两个期望的每一组合并为一行,因为我要检查很多属性:
The following works for me, but I'm wondering if there's a way to combine each group of two expectations into a single line, as I have a lot of attributes to check:
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*; import static org.hamcrest.Matchers.*; .andExpect(jsonPath("$").value(hasKey("keyToNull"))) .andExpect(jsonPath("$.keyToNull").value( anyOf(any(String.class), nullValue(String.class)))) .andExpect(jsonPath("$").value(hasKey("keyToString"))) .andExpect(jsonPath("$.keyToString").value( anyOf(any(String.class), nullValue(String.class))))hasKey()是必需的,因为由于MockMvc实现中不存在的键映射为null,因此另一个断言本身会通过:
The hasKey() is necessary because the other assertion by itself passes since nonexistent keys in MockMvc's implementation map to null:
.andExpect(jsonPath("$.notAKey").value( anyOf(any(String.class), nullValue(String.class)))) // okjsonPath().exists()也不起作用,因为它在内部将值与null进行比较.
jsonPath().exists() also doesn't work, because internally it compares the value against null.
我已经考虑过制作这样一个单独的方法:
I've considered making a separate method like this:
private static <T> void assertNullableAttr(ResultActions res, String jsonPath, Class<T> type) throws Exception { int split = jsonPath.lastIndexOf('.'); String prefix = jsonPath.substring(0, split), key = jsonPath.substring(split+1); res.andExpect(jsonPath(prefix).value(hasKey(key))) .andExpect(jsonPath(jsonPath).value(anyOf(any(type), nullValue(type)))); }但是这随后迫使我以一种不自然的方式拆分代码:
But then it forces me to split my code in an unnatural way:
ResultActions res = mockMvc.perform(get("/api")) // these attributes must not be null .andExpect(jsonPath("$.someInfo").value(hasSize(2))) .andExpect(jsonPath("$.someInfo[0].info1").value(any(String.class))) .andExpect(jsonPath("$.someInfo[0].info2").value(any(String.class))) .andExpect(jsonPath("$.addlInfo").value(hasSize(2))) .andExpect(jsonPath("$.addlInfo[0].info1").value(any(String.class))) .andExpect(jsonPath("$.addlInfo[0].info2").value(any(String.class))); // these attributes may be null assertNullableAttr(res, "$.someInfo[0].info3", String.class); assertNullableAttr(res, "$.someInfo[0].info4", String.class); assertNullableAttr(res, "$.addlInfo[0].info3", String.class); assertNullableAttr(res, "$.addlInfo[0].info4", String.class);每个属性是否可以将一个聪明的Hamcrest Matcher应用于单个json路径?
Is there any clever Hamcrest Matcher I could apply to a single json path per attribute?
推荐答案您可以添加以下静态匹配器工厂:
You can add the following static matcher factory:
public static <K> Matcher<Map<? extends K, ?>> hasNullKey(K key) { return new IsMapContaining<K,Object>(equalTo(key), anyOf(nullValue(), anyString()); }然后,您可以像这样使用它:
And then, you can use it like this:
// will succeed, because keyToNull exists and null .andExpect(jsonPath("$").value(hasNullKey("keyToNull"))) // will succeed, bacause keyToString exists and not null .andExpect(jsonPath("$").value(hasNullKey("keyToString"))) // will fail, because notAKey doesn't exists .andExpect(jsonPath("$").value(hasNullKey("notAKey")))更多推荐
与MockMvc的Hamcrest:检查密钥是否存在,但值可能为null
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