SpringMVC/ mockMVC/ jsonpath compare list of strings

Question

I am currently writing some unit tests for a Spring MVC project. As the returned media type is JSON, I try to use jsonPath to check if the correct values are returned.

The trouble I have is to verify if a list of strings contains the correct (and only the correct) values.

My Plan was:

Check that the list has the correct length
For each element that's supposed to be returned, check whether it's in the list

sadly, none of these things seem to work.

Here's the relevant part of my code:

Collection<AuthorityRole> correctRoles = magicDataSource.getRoles();

ResultActions actions = this.mockMvc.perform(get("/accounts/current/roles").accept(MediaType.APPLICATION_JSON))
.andExpect(status().isOk()) // works
.andExpect(jsonPath("$.data.roles").isArray()) // works
.andExpect(jsonPath("$.data.roles.length").value(correctRoles.size())); // doesn't work

for (AuthorityRole role : correctRoles) // doesn't work
  actions.andExpect(jsonPath("$.data.roles[?(@=='%s')]", role.toString()).exists());

Only the first two "expectations" (isOk & isArray) are working. The other ones (for length and content) I can twist and turn however I want, they're not giving me any useful result.

Any suggestions?

chaldaean · Accepted Answer · 2018-03-17 17:25:23Z

88

1) Instead of

.andExpect(jsonPath("$.data.roles.length").value(correctRoles.size()));

try

.andExpect(jsonPath("$.data.roles.length()").value(correctRoles.size()));

or

.andExpect((jsonPath("$.data.roles", Matchers.hasSize(size))));

2) Instead of

for (AuthorityRole role : correctRoles) // doesn't work
  actions.andExpect(jsonPath("$.data.roles[?(@=='%s')]", role.toString()).exists());

try

actions.andExpect((jsonPath("$.data.roles", Matchers.containsInAnyOrder("role1", "role2", "role3"))));

Keep in mind that you have to add hamcrest-library.

edited Mar 17, 2018 at 17:25

answered Mar 13, 2013 at 9:57

chaldaean

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3 Comments

Ludwig Magnusson Over a year ago

@chaldaean What hamcrest library are you using? In the one I have, hamcrest-all-1.1, the class org.hamcrest.Matchers does not contain the methods hasSize and containsInAnyOrder.

chaldaean Over a year ago

This one - hamcrest-library 1.2.1

Rythmic Over a year ago

For completeness, Hamcrest Matchers can also be added to the value method so andExpect(jsonPath("$.data.roles").value(Matchers.containsInAnyOrder(items...)) is just as legal.

jndietz · Accepted Answer · 2017-02-21 16:41:17Z

7

Here is what I ended up using:

.andExpect(jsonPath('$.data.roles').value(Matchers.hasSize(size)))

and

.andExpect(jsonPath('$.data.roles').value(Matchers.containsInAnyOrder("role1", "role2", "role3")))

edited Feb 21, 2017 at 16:41

answered Feb 20, 2017 at 21:10

jndietz

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