Add Tick TemporalUnit

paper-api/src/test/java/io/papermc/paper/util/TickTest.java

@@ -0,0 +1,43 @@
+package io.papermc.paper.util;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TickTest {
+
+    @Test
+    public void testTickLength() {
+        assertEquals(50, Duration.of(1, Tick.tick()).toMillis());
+        assertEquals(100, Duration.of(2, Tick.tick()).toMillis());
+    }
+
+    @Test
+    public void testTickFromDuration() {
+        assertEquals(0, Tick.tick().fromDuration(Duration.ofMillis(0)));
+        assertEquals(0, Tick.tick().fromDuration(Duration.ofMillis(10)));
+        assertEquals(1, Tick.tick().fromDuration(Duration.ofMillis(60)));
+        assertEquals(2, Tick.tick().fromDuration(Duration.ofMillis(100)));
+    }
+
+    @Test
+    public void testAddTickToInstant() {
+        Instant now = Instant.now();
+        assertEquals(now, now.plus(0, Tick.tick()));
+        assertEquals(now.plus(50, ChronoUnit.MILLIS), now.plus(1, Tick.tick()));
+        assertEquals(now.plus(100, ChronoUnit.MILLIS), now.plus(2, Tick.tick()));
+        assertEquals(now.plus(150, ChronoUnit.MILLIS), now.plus(3, Tick.tick()));
+    }
+
+    @Test
+    public void testTicksBetweenInstants() {
+        Instant now = Instant.now();
+        assertEquals(0, now.until(now.plus(20, ChronoUnit.MILLIS), Tick.tick()));
+        assertEquals(1, now.until(now.plus(50, ChronoUnit.MILLIS), Tick.tick()));
+        assertEquals(1, now.until(now.plus(60, ChronoUnit.MILLIS), Tick.tick()));
+        assertEquals(2, now.until(now.plus(100, ChronoUnit.MILLIS), Tick.tick()));
+    }
+}