WorkloadCertificateConfigurationTest.java

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package com.google.auth.mtls;

import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

import com.google.api.client.json.GenericJson;
import com.google.auth.TestUtils;
import java.io.IOException;
import java.io.InputStream;
import org.junit.jupiter.api.Test;

class WorkloadCertificateConfigurationTest {

  @Test
  void workloadCertificateConfig_fromStream_Succeeds() throws IOException {
    String certPath = "cert.crt";
    String privateKeyPath = "key.crt";
    InputStream configStream = writeWorkloadCertificateConfigStream(certPath, privateKeyPath);

    WorkloadCertificateConfiguration config =
        WorkloadCertificateConfiguration.fromCertificateConfigurationStream(configStream);
    assertNotNull(config);
  }

  @Test
  void workloadCertificateConfig_fromStreamMissingCertPath_Fails() throws IOException {
    String certPath = "";
    String privateKeyPath = "key.crt";
    try (InputStream configStream =
        writeWorkloadCertificateConfigStream(certPath, privateKeyPath)) {
      IllegalArgumentException exception =
          assertThrows(
              IllegalArgumentException.class,
              () ->
                  WorkloadCertificateConfiguration.fromCertificateConfigurationStream(
                      configStream));
      assertTrue(
          exception
              .getMessage()
              .contains(
                  "The cert_path field must be provided in the workload certificate configuration."));
    }
  }

  @Test
  void workloadCertificateConfig_fromStreamMissingPrivateKeyPath_Fails() throws IOException {
    String certPath = "cert.crt";
    String privateKeyPath = "";
    try (InputStream configStream =
        writeWorkloadCertificateConfigStream(certPath, privateKeyPath)) {
      IllegalArgumentException exception =
          assertThrows(
              IllegalArgumentException.class,
              () ->
                  WorkloadCertificateConfiguration.fromCertificateConfigurationStream(
                      configStream));
      assertTrue(
          exception
              .getMessage()
              .contains(
                  "The key_path field must be provided in the workload certificate configuration."));
    }
  }

  @Test
  void workloadCertificateConfig_fromStreamMissingWorkload_Fails() throws IOException {
    GenericJson json = new GenericJson();
    json.put("cert_configs", new GenericJson());
    try (InputStream configStream = TestUtils.jsonToInputStream(json)) {
      CertificateSourceUnavailableException exception =
          assertThrows(
              CertificateSourceUnavailableException.class,
              () ->
                  WorkloadCertificateConfiguration.fromCertificateConfigurationStream(
                      configStream));
      assertTrue(
          exception
              .getMessage()
              .contains(
                  "A workload certificate configuration must be provided in the cert_configs object."));
    }
  }

  @Test
  void workloadCertificateConfig_fromStreamMissingCertConfig_Fails() throws IOException {
    GenericJson json = new GenericJson();
    try (InputStream configStream = TestUtils.jsonToInputStream(json)) {
      IllegalArgumentException exception =
          assertThrows(
              IllegalArgumentException.class,
              () ->
                  WorkloadCertificateConfiguration.fromCertificateConfigurationStream(
                      configStream));
      assertTrue(
          exception
              .getMessage()
              .contains(
                  "The cert_configs object must be provided in the certificate configuration file."));
    }
  }

  static InputStream writeWorkloadCertificateConfigStream(String certPath, String privateKeyPath)
      throws IOException {
    GenericJson json = writeWorkloadCertificateConfigJson(certPath, privateKeyPath);
    return TestUtils.jsonToInputStream(json);
  }

  private static GenericJson writeWorkloadCertificateConfigJson(
      String certPath, String privateKeyPath) {
    GenericJson json = new GenericJson();
    json.put("version", 1);
    GenericJson certConfigs = new GenericJson();
    GenericJson workloadConfig = new GenericJson();
    if (certPath != null) {
      workloadConfig.put("cert_path", certPath);
    }
    if (privateKeyPath != null) {
      workloadConfig.put("key_path", privateKeyPath);
    }
    certConfigs.put("workload", workloadConfig);
    json.put("cert_configs", certConfigs);
    return json;
  }
}