Example using attributeHasFieldErrors and attributeHasNoError

AttributeHasFieldErrors.java

// Test Failed Validation - missing ssn param
DefaultRequestBuilder requestBad = post(url)
		.param("isEmployee", "true");
MockMvcBuilders.standaloneSetup(controller).build()
.perform(requestBad)
	.andExpect(status().isOk())
	.andExpect(model().attributeHasFieldErrors("lookupBean", "ssn"));

AttributeHasNoErrors.java

// No errors found on lookupBean
DefaultRequestBuilder requestBad = post(url)
		.param("isEmployee", "true");
MockMvcBuilders.standaloneSetup(controller).build()
.perform(requestBad)
	.andExpect(status().isOk())
	.andExpect(model().attributeHasNoErrors("lookupBean"));