/*
 * Copyright © 2026 Apple Inc. and the Pkl project authors. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.pkl.core.http

import org.assertj.core.api.Assertions.assertThat
import org.junit.jupiter.api.Test

class HttpClientBuilderTest {
  @Test
  fun `addHeader merges values for duplicate header names`() {
    val client =
      HttpClient.builder()
        .setHeaders(mapOf("**" to mapOf("X-Foo" to listOf("v1"))))
        .addHeaders("**", mapOf("X-Foo" to listOf("v2")))
        .build() as RequestRewritingClient

    val headerValues = client.headers.values.single()["X-Foo"]
    assertThat(headerValues).containsExactly("v1", "v2")
  }

  @Test
  fun `addHeader preserves non-overlapping header names`() {
    val client =
      HttpClient.builder()
        .addHeaders("**", mapOf("X-Foo" to listOf("v1")))
        .addHeaders("**", mapOf("X-Bar" to listOf("v2")))
        .build() as RequestRewritingClient

    val headerMap = client.headers.values.single()
    assertThat(headerMap["X-Foo"]).containsExactly("v1")
    assertThat(headerMap["X-Bar"]).containsExactly("v2")
  }
}
