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/*-
 * ============LICENSE_START=======================================================
 * ONAP-PDP-REST
 * ================================================================================
 * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Modifications Copyright (C) 2019 Samsung
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.onap.policy.pdp.rest.auth.test;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.junit.Before;
import org.junit.Test;
import org.onap.policy.pdp.rest.restAuth.PDPAuthenticationFilter;
import com.att.research.xacml.util.XACMLProperties;
import com.mockrunner.mock.web.MockRequestDispatcher;

public class FilterTest {

    private PDPAuthenticationFilter authenticationFilter = new PDPAuthenticationFilter();
    private final String VALIDHEADERVALUE = "Basic dGVzdHBkcDphbHBoYTQ1Ng==";

    @Before
    public void setUp() throws Exception {
        authenticationFilter.init(null);
        XACMLProperties.reloadProperties();
        System.setProperty(XACMLProperties.XACML_PROPERTIES_NAME, "src/test/resources/pass.xacml.pdp.properties");
        XACMLProperties.getProperties();
    }

    @Test
    public void testDoFilterError() throws IOException, ServletException {
        // create the objects to be mocked
        HttpServletRequest httpServletRequest = mock(HttpServletRequest.class);
        HttpServletResponse httpServletResponse = mock(HttpServletResponse.class);
        FilterChain filterChain = mock(FilterChain.class);
        //
        when(httpServletRequest.getRequestURI()).thenReturn("error");
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        // verify if unauthorized
        verify(httpServletResponse).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
    }

    @Test
    public void testDoFilterNotification() throws IOException, ServletException {
        // create the objects to be mocked
        HttpServletRequest httpServletRequest = mock(HttpServletRequest.class);
        HttpServletResponse httpServletResponse = mock(HttpServletResponse.class);
        FilterChain filterChain = mock(FilterChain.class);
        //
        when(httpServletRequest.getRequestURI()).thenReturn("notifications");
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        verify(filterChain).doFilter(httpServletRequest, httpServletResponse);
    }

    @Test
    public void testDoFilterSwagger() throws Exception {
        // create the objects to be mocked
        HttpServletRequest httpServletRequest = mock(HttpServletRequest.class);
        HttpServletResponse httpServletResponse = mock(HttpServletResponse.class);
        FilterChain filterChain = mock(FilterChain.class);
        //
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/swagger");
        when(httpServletRequest.getRequestDispatcher("/api/swagger")).thenReturn(new MockRequestDispatcher());
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        verify(httpServletRequest).getRequestDispatcher("/api/swagger");
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/api-docs/");
        when(httpServletRequest.getRequestDispatcher("/api/api-docs/")).thenReturn(new MockRequestDispatcher());
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        verify(httpServletRequest).getRequestDispatcher("/api/api-docs/");
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/configuration");
        when(httpServletRequest.getRequestDispatcher("/api/configuration")).thenReturn(new MockRequestDispatcher());
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        verify(httpServletRequest).getRequestDispatcher("/api/configuration");
    }

    @Test
    public void newRequestAuthFailTest() throws Exception {
        // create the objects to be mocked
        HttpServletRequest httpServletRequest = mock(HttpServletRequest.class);
        HttpServletResponse httpServletResponse = mock(HttpServletResponse.class);
        FilterChain filterChain = mock(FilterChain.class);
        //
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/api/getConfig");
        when(httpServletRequest.getHeader(PDPAuthenticationFilter.AUTHENTICATION_HEADER)).thenReturn("error");
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        // verify if unauthorized
        verify(httpServletResponse).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
    }

    @Test
    public void tokenFailureTest() throws Exception {
        // create the objects to be mocked
        HttpServletRequest httpServletRequest = mock(HttpServletRequest.class);
        HttpServletResponse httpServletResponse = mock(HttpServletResponse.class);
        FilterChain filterChain = mock(FilterChain.class);
        //
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/api/getConfig");
        when(httpServletRequest.getHeader(PDPAuthenticationFilter.AUTHENTICATION_HEADER)).thenReturn("Basic test123");
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        // verify if unauthorized
        verify(httpServletResponse).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
    }

    @Test
    public void oldRequestAuthPassTest() throws Exception {
        // create the objects to be mocked
        HttpServletRequest httpServletRequest = mock(HttpServletRequest.class);
        HttpServletResponse httpServletResponse = mock(HttpServletResponse.class);
        FilterChain filterChain = mock(FilterChain.class);
        // New request no environment header check
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/api/getConfig");
        when(httpServletRequest.getRequestDispatcher("/api/getConfig")).thenReturn(new MockRequestDispatcher());
        when(httpServletRequest.getHeader(PDPAuthenticationFilter.AUTHENTICATION_HEADER)).thenReturn(VALIDHEADERVALUE);
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        // verify if authorized
        verify(httpServletRequest).getRequestDispatcher("/api/getConfig");
        //
        // Old Requests Checks
        //
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/getConfig");
        when(httpServletRequest.getRequestDispatcher("/api//getConfig")).thenReturn(new MockRequestDispatcher());
        when(httpServletRequest.getHeader(PDPAuthenticationFilter.AUTHENTICATION_HEADER)).thenReturn(VALIDHEADERVALUE);
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        // verify if authorized
        verify(httpServletRequest).getRequestDispatcher("/api//getConfig");
    }

    @Test
    public void newRequestAuthPassTest() throws Exception {
        // create the objects to be mocked
        HttpServletRequest httpServletRequest = mock(HttpServletRequest.class);
        HttpServletResponse httpServletResponse = mock(HttpServletResponse.class);
        FilterChain filterChain = mock(FilterChain.class);
        //
        // Requests with Valid Environment Header values.
        //
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/getConfig");
        when(httpServletRequest.getRequestDispatcher("/api//getConfig")).thenReturn(new MockRequestDispatcher());
        when(httpServletRequest.getHeader(PDPAuthenticationFilter.ENVIRONMENT_HEADER)).thenReturn("DEVL");
        when(httpServletRequest.getHeader(PDPAuthenticationFilter.AUTHENTICATION_HEADER)).thenReturn(VALIDHEADERVALUE);
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        // verify if authorized
        verify(httpServletRequest).getRequestDispatcher("/api//getConfig");
        // New request no environment header check
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/api/getConfig");
        when(httpServletRequest.getRequestDispatcher("/api/getConfig")).thenReturn(new MockRequestDispatcher());
        when(httpServletRequest.getHeader(PDPAuthenticationFilter.AUTHENTICATION_HEADER)).thenReturn(VALIDHEADERVALUE);
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        // verify if authorized
        verify(httpServletRequest).getRequestDispatcher("/api/getConfig");
        //
        //
        // Requests with InValid Environment Header
        //
        when(httpServletRequest.getRequestURI()).thenReturn("/pdp/getConfig");
        when(httpServletRequest.getRequestDispatcher("/api//getConfig")).thenReturn(new MockRequestDispatcher());
        when(httpServletRequest.getHeader(PDPAuthenticationFilter.ENVIRONMENT_HEADER)).thenReturn("TEST");
        when(httpServletRequest.getHeader(PDPAuthenticationFilter.AUTHENTICATION_HEADER)).thenReturn(VALIDHEADERVALUE);
        authenticationFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
        // verify if unauthorized
        verify(httpServletResponse).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
    }
}