juneau-core/juneau-core-utest/src/test/java/org/apache/juneau/reflection/ConstructorInfoTest.java

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package org.apache.juneau.reflection;

import static org.apache.juneau.reflect.ConstructorInfo.*;
import static org.junit.Assert.*;

import java.lang.reflect.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

import org.apache.juneau.*;
import org.apache.juneau.reflect.*;
import org.junit.*;

public class ConstructorInfoTest {

	private static void check(String expected, Object o) {
		assertEquals(expected, TO_STRING.apply(o));
	}

	private static final Function<Object,String> TO_STRING = new Function<Object,String>() {
		@Override
		public String apply(Object t) {
			if (t == null)
				return null;
			if (t instanceof Iterable)
				return StreamSupport.stream(((Iterable<?>)t).spliterator(), false).map(this).collect(Collectors.joining(","));
			if (t instanceof ClassInfo)
				return ((ClassInfo)t).getSimpleName();
			if (t instanceof ConstructorInfo)
				return ((ConstructorInfo)t).getShortName();
			if (t instanceof Constructor)
				return ConstructorInfo.of((Constructor<?>)t).getShortName();
			return t.toString();
		}
	};

	private static ConstructorInfo ofc(Class<?> c, Class<?>...pt) {
		try {
			return of(c.getConstructor(pt));
		} catch (NoSuchMethodException | SecurityException e) {
			fail(e.getLocalizedMessage());
		}
		return null;
	}

	//-----------------------------------------------------------------------------------------------------------------
	// Instantiation.
	//-----------------------------------------------------------------------------------------------------------------

	static class A {
		public A() {}
	}
	static ConstructorInfo a = ofc(A.class);

	@Test
	public void of_withDeclaringClass() throws Exception {
		check("A()", ConstructorInfo.of(ClassInfo.of(A.class), a.inner(), null));
	}

	@Test
	public void of_noDeclaringClass() throws Exception {
		check("A()", a.inner());
	}

	@Test
	public void getDeclaringClass() throws Exception {
		check("A", a.getDeclaringClass());
	}

	@Test
	public void of_null() throws Exception {
		check(null, ConstructorInfo.of(null));
		check(null, ConstructorInfo.of(null, null, null));
	}

	//-----------------------------------------------------------------------------------------------------------------
	// Other methods
	//-----------------------------------------------------------------------------------------------------------------

	public static class B {
		private String f;
		public B() {}
		public B(String f) {
			this.f = f;
		}
		public B(String f, String f2) {
			this.f = f;
		}
		protected B(int f) {}
		@Override
		public String toString() {
			return f;
		}
	}
	static ClassInfo b = ClassInfo.of(B.class);
	static ConstructorInfo
		b_c1 = b.getPublicConstructor(),
		b_c2 = b.getPublicConstructor(String.class),
		b_c3 = b.getDeclaredConstructor(int.class),
		b_c4 = b.getPublicConstructor(String.class, String.class);


	@Test
	public void invoke() {
		try {
			assertEquals(null, b_c1.invoke().toString());
			assertEquals("foo", b_c2.invoke("foo").toString());
		} catch (Exception e) {
			fail(e.getLocalizedMessage());
		}
	}

	@Test
	public void makeAccessible() {
		b_c3.makeAccessible(Visibility.PROTECTED);
		try {
			assertEquals(null, b_c3.invoke(123).toString());
		} catch (Exception e) {
			fail(e.getLocalizedMessage());
		}
	}

	@Test
	public void compareTo() {
		Set<ConstructorInfo> s = new TreeSet<>(Arrays.asList(b_c1, b_c2, b_c3, b_c4, a));
		check("A(),B(),B(int),B(String),B(String,String)", s);

	}
}