Add server-free plugin behavior tests

src/test/java/com/majinnaibu/bukkitplugins/metropolis/CuboidTest.java

@@ -0,0 +1,53 @@
+package com.majinnaibu.bukkitplugins.metropolis;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.bukkit.Location;
+import org.junit.jupiter.api.Test;
+
+import com.sk89q.worldedit.math.BlockVector3;
+
+class CuboidTest {
+	@Test
+	void convertsWorldEditBoundsToCuboidCoordinates() {
+		Cuboid cuboid = new Cuboid(BlockVector3.at(1, 2, 3), BlockVector3.at(4, 5, 6));
+
+		assertEquals(1, cuboid.getMinX());
+		assertEquals(2, cuboid.getMinY());
+		assertEquals(3, cuboid.getMinZ());
+		assertEquals(4, cuboid.getMaxX());
+		assertEquals(5, cuboid.getMaxY());
+		assertEquals(6, cuboid.getMaxZ());
+	}
+
+	@Test
+	void comparesVectorsByXThenZThenYAndHandlesNulls() {
+		assertEquals(-1, Cuboid.compareBlockVectors(null, BlockVector3.ZERO));
+		assertEquals(1, Cuboid.compareBlockVectors(BlockVector3.ZERO, null));
+		assertEquals(0, Cuboid.compareBlockVectors(null, null));
+		assertTrue(Cuboid.compareBlockVectors(BlockVector3.at(1, 0, 0), BlockVector3.at(2, 0, 0)) < 0);
+		assertTrue(Cuboid.compareBlockVectors(BlockVector3.at(1, 0, 1), BlockVector3.at(1, 0, 2)) < 0);
+		assertTrue(Cuboid.compareBlockVectors(BlockVector3.at(1, 1, 2), BlockVector3.at(1, 2, 2)) < 0);
+	}
+
+	@Test
+	void treatsTouchingBoundsAsIntersecting() {
+		Cuboid first = new Cuboid(0, 0, 0, 10, 10, 10);
+		Cuboid touching = new Cuboid(10, 10, 10, 20, 20, 20);
+		Cuboid separate = new Cuboid(11, 0, 0, 20, 10, 10);
+
+		assertTrue(first.intersects(touching));
+		assertFalse(first.intersects(separate));
+	}
+
+	@Test
+	void containsPointsOnBoundsButRejectsPointsOutside() {
+		Cuboid cuboid = new Cuboid(1, 2, 3, 4, 5, 6);
+
+		assertTrue(cuboid.contains(new Location(null, 1, 2, 3)));
+		assertTrue(cuboid.contains(new Location(null, 4, 5, 6)));
+		assertFalse(cuboid.contains(new Location(null, 5, 5, 6)));
+	}
+}