/*
 * MIT License
 *
 * Copyright (c) 2020-present Cloudogu GmbH and Contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
    
package sonia.scm.security;


import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
import org.junit.jupiter.params.provider.EnumSource;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.GET;
import java.util.Optional;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.lenient;
import static org.mockito.Mockito.when;

/**
 * Tests {@link XsrfAccessTokenValidator}.
 *
 * @author Sebastian Sdorra
 */
@ExtendWith(MockitoExtension.class)
class XsrfAccessTokenValidatorTest {

  @Mock
  private HttpServletRequest request;

  @Mock
  private AccessToken accessToken;

  private XsrfAccessTokenValidator validator;

  /**
   * Prepare object under test.
   */
  @BeforeEach
  void prepareObjectUnderTest() {
    validator = new XsrfAccessTokenValidator(() -> request);
  }

  @Nested
  class RequestMethodPost {

    @BeforeEach
    void setRequestMethod() {
      lenient().when(request.getMethod()).thenReturn("POST");
    }

    /**
     * Tests {@link XsrfAccessTokenValidator#validate(AccessToken)}.
     */
    @Test
    void testValidate() {
      // prepare
      when(accessToken.getCustom(Xsrf.TOKEN_KEY)).thenReturn(Optional.of("abc"));
      when(request.getHeader(Xsrf.HEADER_KEY)).thenReturn("abc");

      // execute and assert
      assertTrue(validator.validate(accessToken));
    }

    /**
     * Tests {@link XsrfAccessTokenValidator#validate(AccessToken)} with wrong header.
     */
    @Test
    void testValidateWithWrongHeader() {
      // prepare
      when(accessToken.getCustom(Xsrf.TOKEN_KEY)).thenReturn(Optional.of("abc"));
      when(request.getHeader(Xsrf.HEADER_KEY)).thenReturn("123");

      // execute and assert
      assertFalse(validator.validate(accessToken));
    }

    /**
     * Tests {@link XsrfAccessTokenValidator#validate(AccessToken)} without header.
     */
    @Test
    void testValidateWithoutHeader() {
      // prepare
      when(accessToken.getCustom(Xsrf.TOKEN_KEY)).thenReturn(Optional.of("abc"));

      // execute and assert
      assertFalse(validator.validate(accessToken));
    }

    /**
     * Tests {@link XsrfAccessTokenValidator#validate(AccessToken)} without claims key.
     */
    @Test
    void testValidateWithoutClaimsKey() {
      // prepare
      when(accessToken.getCustom(Xsrf.TOKEN_KEY)).thenReturn(Optional.empty());

      // execute and assert
      assertTrue(validator.validate(accessToken));
    }

  }

  @ParameterizedTest
  @CsvSource({"GET", "HEAD", "OPTIONS"})
  void shouldNotValidateReadRequests(String method) {
    // prepare
    when(request.getMethod()).thenReturn(method);
    when(accessToken.getCustom(Xsrf.TOKEN_KEY)).thenReturn(Optional.of("abc"));

    // execute and assert
    assertTrue(validator.validate(accessToken));
  }

  @ParameterizedTest
  @CsvSource({"POST", "PUT", "DELETE", "PATCH"})
  void shouldFailValidationOfWriteRequests(String method) {
    // prepare
    when(request.getMethod()).thenReturn(method);
    when(accessToken.getCustom(Xsrf.TOKEN_KEY)).thenReturn(Optional.of("abc"));

    // execute and assert
    assertFalse(validator.validate(accessToken));
  }
}