Adding PlayerMovement class to interpolate/extrapolate position along tests (installing Jasmine)

front/tests/Phaser/Game/PlayerMovementTest.ts

@@ -0,0 +1,40 @@
+import "jasmine";
+import {PlayerMovement} from "../../../src/Phaser/Game/PlayerMovement";
+
+describe("Interpolation / Extrapolation", () => {
+    it("should interpolate", () => {
+        let playerMovement = new PlayerMovement({
+            x: 100, y: 200, moving: true, direction: "right"
+        }, 42000,
+            {
+                x: 200, y: 100, moving: true, direction: "up"
+            },
+            42200
+            );
+
+
+        expect(playerMovement.isOutdated(42100)).toBe(false);
+        expect(playerMovement.isOutdated(43000)).toBe(true);
+
+        expect(playerMovement.getPosition(42100)).toEqual({
+            x: 150,
+            y: 150,
+            direction: 'up',
+            moving: true
+        });
+
+        expect(playerMovement.getPosition(42200)).toEqual({
+            x: 200,
+            y: 100,
+            direction: 'up',
+            moving: true
+        });
+
+        expect(playerMovement.getPosition(42300)).toEqual({
+            x: 250,
+            y: 50,
+            direction: 'up',
+            moving: true
+        });
+    });
+})