ConfigTest.java

/**
 * Copyright (C) 2015 Red Hat, Inc.
 *
 * 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
 *
 *         http://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 io.fabric8.kubernetes.client;

import io.fabric8.kubernetes.client.utils.Serialization;
import io.fabric8.kubernetes.client.utils.Utils;
import okhttp3.OkHttpClient;
import okhttp3.TlsVersion;
import org.apache.commons.lang.SystemUtils;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.attribute.PosixFilePermissions;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static okhttp3.TlsVersion.TLS_1_1;
import static okhttp3.TlsVersion.TLS_1_2;
import static org.junit.Assert.assertNull;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;

public class ConfigTest {

  private static final String TEST_KUBECONFIG_FILE = Utils.filePath(ConfigTest.class.getResource("/test-kubeconfig"));
  private static final String TEST_NAMESPACE_FILE = Utils.filePath(ConfigTest.class.getResource("/test-namespace"));

  private static final String TEST_CONFIG_YML_FILE = Utils.filePath(ConfigTest.class.getResource("/test-config.yml"));

  private static final String TEST_KUBECONFIG_EXEC_FILE = Utils.filePath(ConfigTest.class.getResource("/test-kubeconfig-exec"));
  private static final String TEST_TOKEN_GENERATOR_FILE = Utils.filePath(ConfigTest.class.getResource("/token-generator"));

  private static final String TEST_KUBECONFIG_EXEC_WIN_FILE = Utils.filePath(ConfigTest.class.getResource("/test-kubeconfig-exec-win"));

  private static final String TEST_KUBECONFIG_NO_CURRENT_CONTEXT_FILE = Utils.filePath(ConfigTest.class.getResource("/test-kubeconfig-nocurrentctxt.yml"));
  
  @BeforeEach
  public void setUp() {
    System.getProperties().remove(Config.KUBERNETES_MASTER_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_NAMESPACE_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_OAUTH_TOKEN_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_AUTH_BASIC_USERNAME_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_AUTH_BASIC_PASSWORD_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_TRUST_CERT_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_DISABLE_HOSTNAME_VERIFICATION_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_CA_CERTIFICATE_FILE_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_CA_CERTIFICATE_DATA_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_CLIENT_CERTIFICATE_FILE_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_CLIENT_CERTIFICATE_DATA_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_CLIENT_KEY_FILE_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_CLIENT_KEY_DATA_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_CLIENT_KEY_ALGO_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_CLIENT_KEY_PASSPHRASE_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_CLIENT_KEY_FILE_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_WATCH_RECONNECT_INTERVAL_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_WATCH_RECONNECT_LIMIT_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_REQUEST_TIMEOUT_SYSTEM_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_HTTP_PROXY);
    System.getProperties().remove(Config.KUBERNETES_KUBECONFIG_FILE);
    System.getProperties().remove(Config.KUBERNETES_NAMESPACE_FILE);
    System.getProperties().remove(Config.KUBERNETES_TLS_VERSIONS);
    System.getProperties().remove(Config.KUBERNETES_TRUSTSTORE_FILE_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_TRUSTSTORE_PASSPHRASE_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_KEYSTORE_FILE_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_KEYSTORE_PASSPHRASE_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_SERVICE_HOST_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_SERVICE_PORT_PROPERTY);
    System.getProperties().remove(Config.KUBERNETES_IMPERSONATE_USERNAME);
    System.getProperties().remove(Config.KUBERNETES_IMPERSONATE_GROUP);
  }

  @AfterEach
  public void tearDown() {
    setUp();
  }

  @Test
  void testWithSystemProperties() {
    System.setProperty(Config.KUBERNETES_MASTER_SYSTEM_PROPERTY, "http://somehost:80");
    System.setProperty(Config.KUBERNETES_NAMESPACE_SYSTEM_PROPERTY, "testns");

    System.setProperty(Config.KUBERNETES_OAUTH_TOKEN_SYSTEM_PROPERTY, "token");
    System.setProperty(Config.KUBERNETES_AUTH_BASIC_USERNAME_SYSTEM_PROPERTY, "user");
    System.setProperty(Config.KUBERNETES_AUTH_BASIC_PASSWORD_SYSTEM_PROPERTY, "pass");
    System.setProperty(Config.KUBERNETES_TRUST_CERT_SYSTEM_PROPERTY, "true");
    System.setProperty(Config.KUBERNETES_DISABLE_HOSTNAME_VERIFICATION_SYSTEM_PROPERTY, "true");
    System.setProperty(Config.KUBERNETES_CA_CERTIFICATE_FILE_SYSTEM_PROPERTY, "/path/to/cert");
    System.setProperty(Config.KUBERNETES_CA_CERTIFICATE_DATA_SYSTEM_PROPERTY, "cacertdata");
    System.setProperty(Config.KUBERNETES_CLIENT_CERTIFICATE_FILE_SYSTEM_PROPERTY, "/path/to/clientcert");
    System.setProperty(Config.KUBERNETES_CLIENT_CERTIFICATE_DATA_SYSTEM_PROPERTY, "clientcertdata");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_FILE_SYSTEM_PROPERTY, "/path/to/clientkey");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_DATA_SYSTEM_PROPERTY, "clientkeydata");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_ALGO_SYSTEM_PROPERTY, "algo");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_PASSPHRASE_SYSTEM_PROPERTY, "passphrase");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_FILE_SYSTEM_PROPERTY, "/path/to/clientkey");
    System.setProperty(Config.KUBERNETES_WATCH_RECONNECT_INTERVAL_SYSTEM_PROPERTY, "5000");
    System.setProperty(Config.KUBERNETES_WATCH_RECONNECT_LIMIT_SYSTEM_PROPERTY, "5");
    System.setProperty(Config.KUBERNETES_REQUEST_TIMEOUT_SYSTEM_PROPERTY, "5000");
    System.setProperty(Config.KUBERNETES_HTTP_PROXY, "httpProxy");

    System.setProperty(Config.KUBERNETES_TLS_VERSIONS, "TLSv1.2,TLSv1.1");

    System.setProperty(Config.KUBERNETES_TRUSTSTORE_FILE_PROPERTY, "/path/to/truststore");
    System.setProperty(Config.KUBERNETES_TRUSTSTORE_PASSPHRASE_PROPERTY, "truststorePassphrase");
    System.setProperty(Config.KUBERNETES_KEYSTORE_FILE_PROPERTY, "/path/to/keystore");
    System.setProperty(Config.KUBERNETES_KEYSTORE_PASSPHRASE_PROPERTY, "keystorePassphrase");

    Config config = new Config();
    assertConfig(config);

    config = new ConfigBuilder().build();
    assertConfig(config);
  }

  @Test
  void testWithBuilder() {
    Config config = new ConfigBuilder()
      .withMasterUrl("http://somehost:80")
      .withApiVersion("v1")
      .withNamespace("testns")
      .withOauthToken("token")
      .withUsername("user")
      .withPassword("pass")
      .withTrustCerts(true)
      .withDisableHostnameVerification(true)
      .withCaCertFile("/path/to/cert")
      .withCaCertData("cacertdata")
      .withClientCertFile("/path/to/clientcert")
      .withClientCertData("clientcertdata")
      .withClientKeyFile("/path/to/clientkey")
      .withClientKeyData("clientkeydata")
      .withClientKeyAlgo("algo")
      .withClientKeyPassphrase("passphrase")
      .withWatchReconnectInterval(5000)
      .withWatchReconnectLimit(5)
      .withRequestTimeout(5000)
      .withHttpProxy("httpProxy")
      .withTlsVersions(TLS_1_2, TLS_1_1)
      .withTrustStoreFile("/path/to/truststore")
      .withTrustStorePassphrase("truststorePassphrase")
      .withKeyStoreFile("/path/to/keystore")
      .withKeyStorePassphrase("keystorePassphrase")
      .build();

    assertConfig(config);
  }


  @Test
  void testWithBuilderAndSystemProperties() {
    System.setProperty(Config.KUBERNETES_MASTER_SYSTEM_PROPERTY, "http://tobeoverriden:80");
    System.setProperty(Config.KUBERNETES_NAMESPACE_SYSTEM_PROPERTY, "tobeoverriden");

    System.setProperty(Config.KUBERNETES_OAUTH_TOKEN_SYSTEM_PROPERTY, "token");
    System.setProperty(Config.KUBERNETES_AUTH_BASIC_USERNAME_SYSTEM_PROPERTY, "user");
    System.setProperty(Config.KUBERNETES_AUTH_BASIC_PASSWORD_SYSTEM_PROPERTY, "pass");
    System.setProperty(Config.KUBERNETES_TRUST_CERT_SYSTEM_PROPERTY, "true");
    System.setProperty(Config.KUBERNETES_DISABLE_HOSTNAME_VERIFICATION_SYSTEM_PROPERTY, "true");
    System.setProperty(Config.KUBERNETES_CA_CERTIFICATE_FILE_SYSTEM_PROPERTY, "/path/to/cert");
    System.setProperty(Config.KUBERNETES_CA_CERTIFICATE_DATA_SYSTEM_PROPERTY, "cacertdata");
    System.setProperty(Config.KUBERNETES_CLIENT_CERTIFICATE_FILE_SYSTEM_PROPERTY, "/path/to/clientcert");
    System.setProperty(Config.KUBERNETES_CLIENT_CERTIFICATE_DATA_SYSTEM_PROPERTY, "clientcertdata");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_FILE_SYSTEM_PROPERTY, "/path/to/clientkey");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_DATA_SYSTEM_PROPERTY, "clientkeydata");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_ALGO_SYSTEM_PROPERTY, "algo");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_PASSPHRASE_SYSTEM_PROPERTY, "passphrase");
    System.setProperty(Config.KUBERNETES_CLIENT_KEY_FILE_SYSTEM_PROPERTY, "/path/to/clientkey");
    System.setProperty(Config.KUBERNETES_WATCH_RECONNECT_INTERVAL_SYSTEM_PROPERTY, "5000");
    System.setProperty(Config.KUBERNETES_WATCH_RECONNECT_LIMIT_SYSTEM_PROPERTY, "5");
    System.setProperty(Config.KUBERNETES_REQUEST_TIMEOUT_SYSTEM_PROPERTY, "5000");
    System.setProperty(Config.KUBERNETES_HTTP_PROXY, "httpProxy");

    System.setProperty(Config.KUBERNETES_TLS_VERSIONS, "TLSv1.2,TLSv1.1");

    System.setProperty(Config.KUBERNETES_TRUSTSTORE_FILE_PROPERTY, "/path/to/truststore");
    System.setProperty(Config.KUBERNETES_TRUSTSTORE_PASSPHRASE_PROPERTY, "truststorePassphrase");
    System.setProperty(Config.KUBERNETES_KEYSTORE_FILE_PROPERTY, "/path/to/keystore");
    System.setProperty(Config.KUBERNETES_KEYSTORE_PASSPHRASE_PROPERTY, "keystorePassphrase");

    Config config = new ConfigBuilder()
      .withMasterUrl("http://somehost:80")
      .withNamespace("testns")
      .build();

    assertConfig(config);
  }

  @Test
  void testMasterUrlWithServiceAccount() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, "/dev/null");
    System.setProperty(Config.KUBERNETES_SERVICE_HOST_PROPERTY, "10.0.0.1");
    System.setProperty(Config.KUBERNETES_SERVICE_PORT_PROPERTY, "443");
    Config config = Config.autoConfigure(null);
    assertNotNull(config);
    assertEquals("https://10.0.0.1:443/", config.getMasterUrl());
  }

  @Test
  void testMasterUrlWithServiceAccountIPv6() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, "/dev/null");
    System.setProperty(Config.KUBERNETES_SERVICE_HOST_PROPERTY, "2001:db8:1f70::999:de8:7648:6e8");
    System.setProperty(Config.KUBERNETES_SERVICE_PORT_PROPERTY, "443");
    Config config = Config.autoConfigure(null);
    assertNotNull(config);
    assertEquals("https://[2001:db8:1f70::999:de8:7648:6e8]:443/", config.getMasterUrl());
  }

  @Test
  void testWithKubeConfig() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, TEST_KUBECONFIG_FILE);
    Config config = new Config();
    assertNotNull(config);

    assertEquals("https://172.28.128.4:8443/", config.getMasterUrl());
    assertEquals("testns", config.getNamespace());
    assertEquals("token", config.getOauthToken());
    assertTrue(config.getCaCertFile().endsWith("testns/ca.pem".replace("/", File.separator)));
    assertTrue(new File(config.getCaCertFile()).isAbsolute());
  }

  @Test
  void testWithKubeConfigAndOverrideContext() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, TEST_KUBECONFIG_FILE);
    Config config = Config.autoConfigure("production/172-28-128-4:8443/root");
    assertNotNull(config);

    assertEquals("https://172.28.128.4:8443/", config.getMasterUrl());
    assertEquals("production", config.getNamespace());
    assertEquals("supertoken", config.getOauthToken());
    assertTrue(config.getCaCertFile().endsWith("testns/ca.pem".replace("/", File.separator)));
    assertTrue(new File(config.getCaCertFile()).isAbsolute());
  }

  @Test
  void testWithMultipleKubeConfigAndOverrideContext() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, TEST_KUBECONFIG_FILE + File.pathSeparator + "some-other-file");

    Config config = Config.autoConfigure("production/172-28-128-4:8443/root");
    assertNotNull(config);

    assertEquals("https://172.28.128.4:8443/", config.getMasterUrl());
    assertEquals("production", config.getNamespace());
    assertEquals("supertoken", config.getOauthToken());
    assertTrue(config.getCaCertFile().endsWith("testns/ca.pem".replace("/", File.separator)));
    assertTrue(new File(config.getCaCertFile()).isAbsolute());
  }

  @Test
  void testWithKubeConfigAndSystemProperties() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, TEST_KUBECONFIG_FILE);
    System.setProperty(Config.KUBERNETES_MASTER_SYSTEM_PROPERTY, "http://somehost:80");

    Config config = new Config();
    assertNotNull(config);
    assertEquals("http://somehost:80/", config.getMasterUrl());
    assertEquals("testns", config.getNamespace());
    assertEquals("token", config.getOauthToken());
  }

  @Test
  void testWithKubeConfigAndSytemPropertiesAndBuilder() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, TEST_KUBECONFIG_FILE);
    System.setProperty(Config.KUBERNETES_MASTER_SYSTEM_PROPERTY, "http://somehost:80");

    Config config = new ConfigBuilder()
      .withNamespace("testns2")
      .build();

    assertNotNull(config);
    assertEquals("http://somehost:80/", config.getMasterUrl());
    assertEquals("token", config.getOauthToken());
    assertEquals("testns2", config.getNamespace());
  }

  @Test
  void testWithNamespacePath() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, "nokubeconfigfile");
    System.setProperty(Config.KUBERNETES_NAMESPACE_FILE, TEST_NAMESPACE_FILE);
    System.setProperty(Config.KUBERNETES_MASTER_SYSTEM_PROPERTY, "http://somehost:80");

    Config config = new Config();
    assertNotNull(config);
    assertEquals("http://somehost:80/", config.getMasterUrl());
    assertEquals("testnsfrompath", config.getNamespace());
  }

  @Test
  void testWithNonExistingNamespacePath() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, "nokubeconfigfile");
    System.setProperty(Config.KUBERNETES_NAMESPACE_FILE, "nonamespace");
    System.setProperty(Config.KUBERNETES_MASTER_SYSTEM_PROPERTY, "http://somehost:80");

    Config config = new Config();
    assertNotNull(config);
    assertEquals("http://somehost:80/", config.getMasterUrl());
    Assertions.assertNull(config.getNamespace());
  }

  @Test
  void testWithNamespacePathAndSystemProperties() {
    System.setProperty(Config.KUBERNETES_NAMESPACE_FILE, TEST_NAMESPACE_FILE);
    System.setProperty(Config.KUBERNETES_MASTER_SYSTEM_PROPERTY, "http://somehost:80");
    System.setProperty(Config.KUBERNETES_NAMESPACE_SYSTEM_PROPERTY, "testns");

    Config config = new Config();
    assertNotNull(config);
    assertEquals("http://somehost:80/", config.getMasterUrl());
    assertEquals("testns", config.getNamespace());
  }

  @Test
  void testWithKubeConfigAndNoContext() {
    System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, TEST_KUBECONFIG_NO_CURRENT_CONTEXT_FILE);
    Config config = new Config();
    assertNotNull(config);

    assertNull(config.getCurrentContext());
    assertEquals(3, config.getContexts().size());
    assertEquals(Config.DEFAULT_MASTER_URL + "/", config.getMasterUrl());
    assertNull(config.getNamespace());
  }

  @Test
  void testWithNamespacePathAndSytemPropertiesAndBuilder() {
    System.setProperty(Config.KUBERNETES_NAMESPACE_FILE, TEST_NAMESPACE_FILE);
    System.setProperty(Config.KUBERNETES_MASTER_SYSTEM_PROPERTY, "http://somehost:80");
    System.setProperty(Config.KUBERNETES_NAMESPACE_SYSTEM_PROPERTY, "tobeoverriden");

    Config config = new ConfigBuilder()
      .withNamespace("testns2")
      .build();

    assertNotNull(config);
    assertEquals("http://somehost:80/", config.getMasterUrl());
    assertEquals("testns2", config.getNamespace());
  }

  @Test
  void testWithCustomHeader() {
    Map<String,String> customHeaders = new HashMap<>();
    customHeaders.put("user-id","test-user");
    customHeaders.put("cluster-id","test-cluster");
    Config config = new ConfigBuilder()
      .withCustomHeaders(customHeaders)
      .build();

    assertNotNull(config);
    assertNotNull(config.getCustomHeaders());
    assertEquals(2,config.getCustomHeaders().size());
  }

  @Test
  void shouldSetImpersonateUsernameAndGroupFromSystemProperty() {

    System.setProperty(Config.KUBERNETES_IMPERSONATE_USERNAME, "username");
    System.setProperty(Config.KUBERNETES_IMPERSONATE_GROUP, "group");

    final Map<String, List<String>> extras = new HashMap<>();
    extras.put("c", Collections.singletonList("d"));

    final Config config = new ConfigBuilder()
      .withImpersonateUsername("a")
      .withImpersonateExtras(extras)
      .build();

    assertEquals("a", config.getImpersonateUsername());
    assertArrayEquals(new String[]{"group"}, config.getImpersonateGroups());
    assertEquals(Collections.singletonList("d"), config.getImpersonateExtras().get("c"));

  }

  @Test
  void shouldInstantiateClientUsingYaml() {
    File configYml = new File(TEST_CONFIG_YML_FILE);
    try (InputStream is = new FileInputStream(configYml)){
      KubernetesClient client = DefaultKubernetesClient.fromConfig(is);
      assertEquals("http://some.url", client.getMasterUrl().toString());
    } catch (Exception e) {
      fail();
    }
  }

  @Test
  void shouldInstantiateClientUsingSerializeDeserialize() {
    DefaultKubernetesClient original = new DefaultKubernetesClient();
    String json = Serialization.asJson(original.getConfiguration());
    DefaultKubernetesClient copy = DefaultKubernetesClient.fromConfig(json);

    assertEquals(original.getConfiguration().getMasterUrl(), copy.getConfiguration().getMasterUrl());
    assertEquals(original.getConfiguration().getOauthToken(), copy.getConfiguration().getOauthToken());
    assertEquals(original.getConfiguration().getNamespace(), copy.getConfiguration().getNamespace());
    assertEquals(original.getConfiguration().getUsername(), copy.getConfiguration().getUsername());
    assertEquals(original.getConfiguration().getPassword(), copy.getConfiguration().getPassword());
  }

  @Test
  void shouldRespectMaxRequests() {
    Config config = new ConfigBuilder()
      .withMaxConcurrentRequests(120)
      .build();

    KubernetesClient client = new DefaultKubernetesClient();
    assertEquals(64, client.adapt(OkHttpClient.class).dispatcher().getMaxRequests());

    client = new DefaultKubernetesClient(config);
    assertEquals(120, client.adapt(OkHttpClient.class).dispatcher().getMaxRequests());
  }
  
  @Test
  void shouldRespectMaxRequestsPerHost() {
    Config config = new ConfigBuilder()
      .withMaxConcurrentRequestsPerHost(20)
      .build();

    KubernetesClient client = new DefaultKubernetesClient();
    assertEquals(5, client.adapt(OkHttpClient.class).dispatcher().getMaxRequestsPerHost());

    client = new DefaultKubernetesClient(config);
    assertEquals(20, client.adapt(OkHttpClient.class).dispatcher().getMaxRequestsPerHost());
  }

  @Test
  void shouldPropagateImpersonateSettings() {

    final Map<String, List<String>> extras = new HashMap<>();
    extras.put("c", Collections.singletonList("d"));

    final Config config = new ConfigBuilder()
      .withImpersonateUsername("a")
      .withImpersonateGroup("b")
      .withImpersonateExtras(extras)
      .build();

    final DefaultKubernetesClient client = new DefaultKubernetesClient(config);
    final Config currentConfig = client.getConfiguration();

    assertEquals("a", currentConfig.getImpersonateUsername());
    assertArrayEquals(new String[]{"b"}, currentConfig.getImpersonateGroups());
    assertEquals(Collections.singletonList("d"), currentConfig.getImpersonateExtras().get("c"));
  }

  @Test
  void honorClientAuthenticatorCommands() throws Exception {
    if (SystemUtils.IS_OS_WINDOWS) {
      System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, TEST_KUBECONFIG_EXEC_WIN_FILE);
    } else {
      Files.setPosixFilePermissions(Paths.get(TEST_TOKEN_GENERATOR_FILE), PosixFilePermissions.fromString("rwxrwxr-x"));
      System.setProperty(Config.KUBERNETES_KUBECONFIG_FILE, TEST_KUBECONFIG_EXEC_FILE);
    }

    Config config = Config.autoConfigure(null);
    assertNotNull(config);
    assertEquals("HELLO WORLD", config.getOauthToken());
  }

  @Test
  void shouldBeUsedTokenSuppliedByProvider() {

    Config config = new ConfigBuilder().withOauthToken("oauthToken")
                                       .withOauthTokenProvider(() -> "PROVIDER_TOKEN")
                                       .build();

    assertEquals("PROVIDER_TOKEN", config.getOauthToken());
  }

  @Test
  void shouldHonorDefaultWebsocketPingInterval() {
    Config config = new ConfigBuilder().build();

    assertEquals(30000L, config.getWebsocketPingInterval());
  }

  @Test
  void testKubeConfigWithAuthConfigProvider() throws URISyntaxException  {
    System.setProperty("kubeconfig", new File(getClass().getResource("/test-kubeconfig").toURI()).getAbsolutePath());
    Config config = Config.autoConfigure("production/172-28-128-4:8443/mmosley");

    assertEquals("https://172.28.128.4:8443/", config.getMasterUrl());
    assertEquals("eyJraWQiOiJDTj1vaWRjaWRwLnRyZW1vbG8ubGFuLCBPVT1EZW1vLCBPPVRybWVvbG8gU2VjdXJpdHksIEw9QXJsaW5ndG9uLCBTVD1WaXJnaW5pYSwgQz1VUy1DTj1rdWJlLWNhLTEyMDIxNDc5MjEwMzYwNzMyMTUyIiwiYWxnIjoiUlMyNTYifQ.eyJpc3MiOiJodHRwczovL29pZGNpZHAudHJlbW9sby5sYW46ODQ0My9hdXRoL2lkcC9PaWRjSWRQIiwiYXVkIjoia3ViZXJuZXRlcyIsImV4cCI6MTQ4MzU0OTUxMSwianRpIjoiMm96US15TXdFcHV4WDlHZUhQdy1hZyIsImlhdCI6MTQ4MzU0OTQ1MSwibmJmIjoxNDgzNTQ5MzMxLCJzdWIiOiI0YWViMzdiYS1iNjQ1LTQ4ZmQtYWIzMC0xYTAxZWU0MWUyMTgifQ.w6p4J_6qQ1HzTG9nrEOrubxIMb9K5hzcMPxc9IxPx2K4xO9l-oFiUw93daH3m5pluP6K7eOE6txBuRVfEcpJSwlelsOsW8gb8VJcnzMS9EnZpeA0tW_p-mnkFc3VcfyXuhe5R3G7aa5d8uHv70yJ9Y3-UhjiN9EhpMdfPAoEB9fYKKkJRzF7utTTIPGrSaSU6d2pcpfYKaxIwePzEkT4DfcQthoZdy9ucNvvLoi1DIC-UocFD8HLs8LYKEqSxQvOcvnThbObJ9af71EwmuE21fO5KzMW20KtAeget1gnldOosPtz1G5EwvaQ401-RPQzPGMVBld0_zMCAwZttJ4knw",
      config.getOauthToken());
  }

  @Test
  void testEmptyConfig() {
    // Given
    Config emptyConfig = null;

    // When
    emptyConfig = Config.empty();

    // Then
    assertNotNull(emptyConfig);
    assertEquals("https://kubernetes.default.svc", emptyConfig.getMasterUrl());
    assertTrue(emptyConfig.getContexts().isEmpty());
    assertNull(emptyConfig.getCurrentContext());
    assertEquals(64, emptyConfig.getMaxConcurrentRequests());
    assertEquals(5, emptyConfig.getMaxConcurrentRequestsPerHost());
    assertFalse(emptyConfig.isTrustCerts());
    assertFalse(emptyConfig.isDisableHostnameVerification());
    assertEquals("RSA", emptyConfig.getClientKeyAlgo());
    assertEquals("changeit", emptyConfig.getClientKeyPassphrase());
    assertEquals(1000, emptyConfig.getWatchReconnectInterval());
    assertEquals(-1, emptyConfig.getWatchReconnectLimit());
    assertEquals(10000, emptyConfig.getConnectionTimeout());
    assertEquals(10000, emptyConfig.getRequestTimeout());
    assertEquals(900000, emptyConfig.getRollingTimeout());
    assertEquals(600000, emptyConfig.getScaleTimeout());
    assertEquals(20000, emptyConfig.getLoggingInterval());
    assertEquals(5000, emptyConfig.getWebsocketTimeout());
    assertEquals(30000, emptyConfig.getWebsocketPingInterval());
    assertTrue(emptyConfig.getImpersonateExtras().isEmpty());
    assertEquals(0, emptyConfig.getImpersonateGroups().length);
    assertFalse(emptyConfig.isHttp2Disable());
    assertEquals(1, emptyConfig.getTlsVersions().length);
    assertTrue(emptyConfig.getErrorMessages().isEmpty());
  }

  private void assertConfig(Config config) {
    assertNotNull(config);
    assertTrue(config.isTrustCerts());
    assertTrue(config.isDisableHostnameVerification());
    assertEquals("http://somehost:80/", config.getMasterUrl());
    assertEquals("testns", config.getNamespace());
    assertEquals("token", config.getOauthToken());
    assertEquals("user", config.getUsername());
    assertEquals("pass", config.getPassword());
    assertEquals("/path/to/cert", config.getCaCertFile());
    assertEquals("cacertdata", config.getCaCertData());
    assertEquals("/path/to/clientcert", config.getClientCertFile());
    assertEquals("clientcertdata", config.getClientCertData());

    assertEquals("/path/to/clientkey", config.getClientKeyFile());
    assertEquals("clientkeydata", config.getClientKeyData());
    assertEquals("algo", config.getClientKeyAlgo());
    assertEquals("passphrase", config.getClientKeyPassphrase());

    assertEquals("httpProxy", config.getHttpProxy());

    assertEquals(5000, config.getWatchReconnectInterval());
    assertEquals(5, config.getWatchReconnectLimit());
    assertEquals(5000, config.getRequestTimeout());

    assertArrayEquals(new TlsVersion[]{TLS_1_2, TLS_1_1}, config.getTlsVersions());

    assertEquals("/path/to/truststore", config.getTrustStoreFile());
    assertEquals("truststorePassphrase", config.getTrustStorePassphrase());
    assertEquals("/path/to/keystore", config.getKeyStoreFile());
    assertEquals("keystorePassphrase", config.getKeyStorePassphrase());
  }
}