mirror of
https://github.com/GTNewHorizons/ForgeMultipart.git
synced 2026-11-13 00:47:52 +00:00
Algent
8294240659
Freezes the observable behavior of TCuboidPart, JCuboidPart and the
TCuboidPart$class bridge before the Java port, per the test-first gate in
JAVA_MIGRATION.md. All cases pass against the untouched Scala.
Records two asymmetries worth preserving: getSubParts wraps the bounds in
an IndexedCuboid6, whose copy constructor makes it a copy carrying a boxed
Integer 0 as data, while getCollisionBoxes aliases the bounds instance
itself. Cuboid6 has no equals, so geometry is compared component-wise.
Also adds a frozen Scala consumer compiled with 2.11.5 against the
reference dev jar at 246daff. Its forwarders call all four $class statics,
so it detects the linkage break that a freshly recompiled test would miss.
ForgeRelocationFMP, OpenComputers, ProjRed and ProjectBlue all depend on
those descriptors.
One case exists specifically to guard the port: TMultiPart supplies empty
getSubParts and getCollisionBoxes, and on the JVM a superclass method beats
an interface default, so a Java interface cannot reproduce Scala trait
linearization on its own.
69 lines
2.4 KiB
Java
69 lines
2.4 KiB
Java
package codechicken.multipart;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import java.io.InputStream;
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import java.nio.charset.StandardCharsets;
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import java.util.Base64;
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import java.util.Iterator;
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import java.util.Objects;
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import java.util.Scanner;
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import org.junit.jupiter.api.Test;
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import codechicken.lib.raytracer.IndexedCuboid6;
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import codechicken.lib.vec.Cuboid6;
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/**
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* Loads a Scala class compiled against the reference dev jar, whose forwarders call TCuboidPart$class directly.
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* Recompiling the fixture against the port would hide the linkage failure this exists to catch.
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*/
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class TCuboidPartBinaryCompatibilityTest {
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@Test
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void referenceScalaImplementorStillLinksThroughTheBridge() throws Exception {
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byte[] bytecode = loadFixture();
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Class<?> fixtureClass = new FixtureClassLoader(TCuboidPart.class.getClassLoader()).define(bytecode);
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Object fixture = fixtureClass.getDeclaredConstructor().newInstance();
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assertTrue(fixture instanceof TCuboidPart);
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assertTrue(fixture instanceof TMultiPart);
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TCuboidPart part = (TCuboidPart) fixture;
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Cuboid6 bounds = part.getBounds();
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assertEquals(0.5, bounds.max.x);
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Iterator<IndexedCuboid6> subParts = part.getSubParts().iterator();
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IndexedCuboid6 only = subParts.next();
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assertEquals(Integer.valueOf(0), only.data);
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assertEquals(0.5, only.max.x);
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assertFalse(subParts.hasNext());
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Iterator<Cuboid6> boxes = part.getCollisionBoxes().iterator();
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assertEquals(0.5, boxes.next().max.x);
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assertFalse(boxes.hasNext());
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}
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private static byte[] loadFixture() {
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InputStream input = Objects.requireNonNull(
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TCuboidPartBinaryCompatibilityTest.class
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.getResourceAsStream("/compat/ReferenceScalaCuboidPart.class.b64"));
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try (Scanner scanner = new Scanner(input, StandardCharsets.US_ASCII.name()).useDelimiter("\\A")) {
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return Base64.getMimeDecoder().decode(scanner.next());
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}
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}
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private static final class FixtureClassLoader extends ClassLoader {
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private FixtureClassLoader(ClassLoader parent) {
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super(parent);
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}
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private Class<?> define(byte[] bytecode) {
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return defineClass(null, bytecode, 0, bytecode.length);
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}
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}
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}
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