juneau-utest/src/test/java/org/apache/juneau/http/header/Upgrade_Test.java

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package org.apache.juneau.http.header;

import static org.apache.juneau.http.HttpHeaders.*;
import static org.junit.runners.MethodSorters.*;

import java.io.*;
import java.util.*;
import java.util.function.*;

import org.apache.juneau.collections.*;
import org.apache.juneau.http.annotation.*;
import org.apache.juneau.internal.*;
import org.apache.juneau.rest.annotation.*;
import org.apache.juneau.rest.client.*;
import org.apache.juneau.rest.mock.*;
import org.junit.*;

@FixMethodOrder(NAME_ASCENDING)
public class Upgrade_Test {

	private static final String HEADER = "Upgrade";
	private static final String VALUE = "foo";
	private static final List<String> PARSED = AList.of("foo");

	@Rest
	public static class A {
		@RestOp
		public StringReader get(@Header(name=HEADER,multi=true) String[] h) {
			return new StringReader(h == null ? "null" : StringUtils.join(h, ','));
		}
	}

	//------------------------------------------------------------------------------------------------------------------
	// Method tests
	//------------------------------------------------------------------------------------------------------------------

	@Test
	public void a01_basic() throws Exception {
		RestClient c = client().build();

		// Normal usage.
		c.get().header(upgrade(VALUE)).run().assertBody().is(VALUE);
		c.get().header(upgrade(VALUE)).run().assertBody().is(VALUE);
		c.get().header(upgrade(PARSED)).run().assertBody().is(VALUE);
		c.get().header(upgrade(()->PARSED)).run().assertBody().is(VALUE);

		// Invalid usage.
		c.get().header(upgrade((String)null)).run().assertBody().isEmpty();
		c.get().header(upgrade((Supplier<List<String>>)null)).run().assertBody().isEmpty();
		c.get().header(upgrade(()->null)).run().assertBody().isEmpty();
	}

	//------------------------------------------------------------------------------------------------------------------
	// Helper methods.
	//------------------------------------------------------------------------------------------------------------------

	private static RestClientBuilder client() {
		return MockRestClient.create(A.class);
	}
}