Kotlin test expected SingletonMap but was LinkedHashMap - unit-testing

Question

I am new to Kotlin and Java so bear with me but I just wrote a Kotlin test as follows:
package com.squareup.cash.transactiongraph.service.actions
import com.squareup.cash.transactiongraph.TransactionGraphTestingModule
import com.squareup.cash.transactiongraph.client.franklin.FakeFranklinClient
import com.squareup.cash.transactiongraph.dataloader.DataLoaderRegistryFactory
import com.squareup.cash.transactiongraph.graphql.GraphQLContextFactory
import com.squareup.cash.transactiongraph.graphql.TransactionGraphContextFactory
import com.squareup.cash.transactiongraph.service.TransactionGraphGraphqlModule
import com.squareup.graphql.dataloaders.FlowDataLoaderDispatcher
import kotlinx.coroutines.future.await
import kotlinx.coroutines.runBlocking
import misk.testing.MiskTest
import misk.testing.MiskTestModule
import okhttp3.Headers
import org.junit.jupiter.api.Test
import org.assertj.core.api.Assertions.assertThat
#MiskTest(startService = true)
class CashCustomerTransactionsQueryTest {
#MiskTestModule
private val module = TransactionGraphTestingModule()
#Test
fun `returns an array of CashTransactions`() = runBlocking<Unit> {
val query = """
{
cashCustomerTransactions(customerToken: "customerToken") {
id
reasonCode
createdAt
}
}
""".trimIndent()
val result = execute(query)
assertThat(result["errors"]).isNull()
assertThat(result["data"]).isEqualTo(
mapOf(
"cashCustomerTransactions" to arrayOf(
mapOf(
"createdAt" to "2019-03-20T18:26:18Z",
"id" to "TOKEN",
"reasonCode" to "CARD_PRESENT_PURCHASE"
)
)
)
)
}
private suspend fun execute(query: String): Map<String, Any> {
val franklinClient = FakeFranklinClient()
val dataLoaderRegistryFactory = DataLoaderRegistryFactory()
val flowDataLoaderDispatcher = FlowDataLoaderDispatcher(dataLoaderRegistryFactory)
return flowDataLoaderDispatcher.run { registry ->
val contextFactory: GraphQLContextFactory =
TransactionGraphContextFactory(franklinClient)
TransactionGraphGraphqlModule().graphQL().executeAsync {
it
.query(query)
.context(contextFactory.build(Headers.Builder().build(), registry))
}.await().toSpecification()
}
}
}
Upon running the test it fails with the following error: expected: "{"cashCustomerTransactions"=[{"createdAt"="2019-03-20T18:26:18Z", "id"="TOKEN", "reasonCode"="CARD_PRESENT_PURCHASE"}]} (SingletonMap#58303289)" but was: "{"cashCustomerTransactions"=[{"createdAt"="2019-03-20T18:26:18Z", "id"="TOKEN", "reasonCode"="CARD_PRESENT_PURCHASE"}]} (LinkedHashMap#c32f16d)"
The following responses appear to be identical with the exception that one is a SingletonMap and one is a LinkedHashMap. I do not understand why the types are different. What am I doing incorrectly? Can someone please point me in the right direction. Thank you

Answer 1

Change arrayOf to listOf and the problem will be solved.