test: added initial SweepTest

AlmasB · AlmasB · commit 47ec9379008a · 2023-03-23T18:55:04.000Z
diff --git a/fxgl-entity/src/test/kotlin/com/almasb/fxgl/physics/box2d/common/SweepTest.kt b/fxgl-entity/src/test/kotlin/com/almasb/fxgl/physics/box2d/common/SweepTest.kt
@@ -0,0 +1,55 @@
+/*
+ * FXGL - JavaFX Game Library. The MIT License (MIT).
+ * Copyright (c) AlmasB (almaslvl@gmail.com).
+ * See LICENSE for details.
+ */
+
+package com.almasb.fxgl.physics.box2d.common
+
+import com.almasb.fxgl.core.math.Vec2
+import org.hamcrest.MatcherAssert.*
+import org.hamcrest.Matchers.*
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+
+/**
+ *
+ * @author Almas Baimagambetov (almaslvl@gmail.com)
+ */
+class SweepTest {
+
+    private lateinit var sweep: Sweep
+
+    @BeforeEach
+    fun `setUp`() {
+        sweep = Sweep()
+    }
+
+    @Test
+    fun `normalize`() {
+        // > 2 PI
+        sweep.a0 = 7f
+
+        sweep.normalize()
+
+        assertThat(sweep.a0, `is`(0.7168145f))
+        assertThat(sweep.a, `is`(-6.2831855f))
+    }
+
+    @Test
+    fun `get transform at given time`() {
+        sweep.c.set(2f, 0f)
+        sweep.a0 = 2f
+        sweep.a = 4f
+
+        val xf = Transform()
+
+        sweep.getTransform(xf, 0.5f)
+
+        assertThat(xf.p, `is`(Vec2(1f, 0f)))
+
+        // Rotation(3f)
+        assertThat(xf.q.c, `is`(-0.9899941f))
+        assertThat(xf.q.s, `is`(0.14109027f))
+    }
+}
