chore(internal): add tests for _headers() (#539)

Author: stainless-app[bot]

lithic-java-core/src/test/kotlin/com/lithic/api/models/FinancialAccountCreateParamsTest.kt

@@ -2,6 +2,7 @@
 
 package com.lithic.api.models
 
+import com.lithic.api.core.http.Headers
 import kotlin.test.assertNotNull
 import org.assertj.core.api.Assertions.assertThat
 import org.junit.jupiter.api.Test
@@ -19,6 +20,40 @@ internal class FinancialAccountCreateParamsTest {
             .build()
     }
 
+    @Test
+    fun headers() {
+        val params =
+            FinancialAccountCreateParams.builder()
+                .idempotencyKey("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
+                .nickname("nickname")
+                .type(FinancialAccountCreateParams.Type.OPERATING)
+                .accountToken("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
+                .isForBenefitOf(true)
+                .build()
+
+        val headers = params._headers()
+
+        assertThat(headers)
+            .isEqualTo(
+                Headers.builder()
+                    .put("Idempotency-Key", "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
+                    .build()
+            )
+    }
+
+    @Test
+    fun headersWithoutOptionalFields() {
+        val params =
+            FinancialAccountCreateParams.builder()
+                .nickname("nickname")
+                .type(FinancialAccountCreateParams.Type.OPERATING)
+                .build()
+
+        val headers = params._headers()
+
+        assertThat(headers).isEqualTo(Headers.builder().build())
+    }
+
     @Test
     fun body() {
         val params =