2 files changed, 103 insertions, 0 deletions
diff --git a/src/test/kotlin/util/math/GChainReconciliationTest.kt b/src/test/kotlin/util/math/GChainReconciliationTest.kt
new file mode 100644
index 0000000..380ea5c
--- /dev/null
+++ b/src/test/kotlin/util/math/GChainReconciliationTest.kt
@@ -0,0 +1,75 @@
+package moe.nea.firmament.test.util.math
+
+import org.junit.jupiter.api.Assertions
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+import moe.nea.firmament.util.math.GChainReconciliation
+import moe.nea.firmament.util.math.GChainReconciliation.rotated
+
+class GChainReconciliationTest  {
+
+	fun <T> assertEqualCycles(
+		expected: List<T>,
+		actual: List<T>
+	) {
+		for (offset in expected.indices) {
+			val rotated = expected.rotated(offset)
+			val matchesAtRotation = run {
+				for ((i, v) in actual.withIndex()) {
+					if (rotated[i % rotated.size] != v)
+						return@run false
+				}
+				true
+			}
+			if (matchesAtRotation)
+				return
+		}
+		assertEquals(expected, actual, "Expected arrays to be cycle equivalent")
+	}
+
+	@Test
+	fun testUnfixableCycleNotBeingModified() {
+		assertEquals(
+			listOf(1, 2, 3, 4, 6, 1, 2, 3, 4, 6),
+			GChainReconciliation.reconcileCycles(
+				listOf(1, 2, 3, 4, 6, 1, 2, 3, 4, 6),
+				listOf(2, 3, 4, 5, 1, 2, 3, 4, 5, 1)
+			)
+		)
+	}
+
+	@Test
+	fun testMultipleIndependentHoles() {
+		assertEqualCycles(
+			listOf(1, 2, 3, 4, 5, 6),
+			GChainReconciliation.reconcileCycles(
+				listOf(1, 3, 4, 5, 6, 1, 3, 4, 5, 6),
+				listOf(2, 3, 4, 5, 1, 2, 3, 4, 5, 1)
+			)
+		)
+
+	}
+
+	@Test
+	fun testBigHole() {
+		assertEqualCycles(
+			listOf(1, 2, 3, 4, 5, 6),
+			GChainReconciliation.reconcileCycles(
+				listOf(1, 4, 5, 6, 1, 4, 5, 6),
+				listOf(2, 3, 4, 5, 1, 2, 3, 4, 5, 1)
+			)
+		)
+
+	}
+
+	@Test
+	fun testOneMissingBeingDetected() {
+		assertEqualCycles(
+			listOf(1, 2, 3, 4, 5, 6),
+			GChainReconciliation.reconcileCycles(
+				listOf(1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6),
+				listOf(2, 3, 4, 5, 1, 2, 3, 4, 5, 1)
+			)
+		)
+	}
+}
diff --git a/src/test/kotlin/util/math/ProjectionsBoxTest.kt b/src/test/kotlin/util/math/ProjectionsBoxTest.kt
new file mode 100644
index 0000000..04720a3
--- /dev/null
+++ b/src/test/kotlin/util/math/ProjectionsBoxTest.kt
@@ -0,0 +1,28 @@
+package moe.nea.firmament.test.util.math
+
+import java.util.stream.Stream
+import org.junit.jupiter.api.Assertions
+import org.junit.jupiter.api.DynamicTest
+import org.junit.jupiter.api.TestFactory
+import kotlin.streams.asStream
+import net.minecraft.util.math.Vec2f
+import moe.nea.firmament.util.math.Projections
+
+class ProjectionsBoxTest {
+	val Double.degrees get() = Math.toRadians(this)
+
+	@TestFactory
+	fun testProjections(): Stream<DynamicTest> {
+		return sequenceOf(
+			0.0.degrees to Vec2f(1F, 0F),
+			63.4349.degrees to Vec2f(0.5F, 1F),
+		).map { (angle, expected) ->
+			DynamicTest.dynamicTest("ProjectionsBoxTest::projectAngleOntoUnitBox(${angle})") {
+				val actual = Projections.Two.projectAngleOntoUnitBox(angle)
+				fun msg() = "Expected (${expected.x}, ${expected.y}) got (${actual.x}, ${actual.y})"
+				Assertions.assertEquals(expected.x, actual.x, 0.0001F, ::msg)
+				Assertions.assertEquals(expected.y, actual.y, 0.0001F, ::msg)
+			}
+		}.asStream()
+	}
+}