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 * to you under the Apache License, Version 2.0 (the            *
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package org.apache.james.jmap.utils;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import java.util.Collections;

import javax.servlet.http.HttpServletRequest;

import org.junit.Before;
import org.junit.Test;

import com.google.common.collect.ImmutableList;

public class HeadersAuthenticationExtractorTest {

    private HeadersAuthenticationExtractor testee;

    @Before
    public void setup() {
        testee = new HeadersAuthenticationExtractor();
    }

    @Test
    public void authHeadersShouldThrowWhenRequestIsNull() {
        assertThatThrownBy(() -> testee.authHeaders(null))
            .isExactlyInstanceOf(IllegalArgumentException.class);
    }

    @Test
    public void authHeadersShouldReturnEmptyStreamWhenNoAuthorizationHeader() {
        HttpServletRequest request = mock(HttpServletRequest.class);
        when(request.getHeaders("Authorization"))
            .thenReturn(Collections.emptyEnumeration());

        assertThat(testee.authHeaders(request)).isEmpty();
    }

    @Test
    public void authHeadersShouldReturnStreamOfHeadersWhenSome() {
        HttpServletRequest request = mock(HttpServletRequest.class);
        ImmutableList<String> expectedHeaders = ImmutableList.of("header", "otherHeader");
        when(request.getHeaders("Authorization"))
            .thenReturn(Collections.enumeration(expectedHeaders));

        assertThat(testee.authHeaders(request)).containsOnlyElementsOf(expectedHeaders);
    }
}
