(#53) Refactored MovementType class into function

Author: s1hofmann

lib/movementtype.class.ts

@@ -1,23 +1,23 @@
-import { MovementType } from "./movementtype.class";
+import { linear } from "./movementtype.function";
 
 describe("MovementType", () => {
   it("should return a set of linear timesteps, one millisecond per step.", () => {
     const expected = [1, 1, 1, 1, 1, 1];
-    expect(MovementType.linear(6, 1000)).toEqual(expected);
+    expect(linear(6, 1000)).toEqual(expected);
   });
 
   it("should threshold movement speed to one pixel per millisecond in case of faster movement.", () => {
     const expected = [1, 1, 1, 1, 1, 1];
-    expect(MovementType.linear(6, 2000)).toEqual(expected);
+    expect(linear(6, 2000)).toEqual(expected);
   });
 
   it("should should return a set of linear timesteps, two milliseconds per step.", () => {
     const expected = [2, 2, 2, 2, 2, 2];
-    expect(MovementType.linear(6, 500)).toEqual(expected);
+    expect(linear(6, 500)).toEqual(expected);
   });
 
   it("should floor movement to three milliseconds per step.", () => {
     const expected = [3, 3, 3, 3, 3, 3];
-    expect(MovementType.linear(6, 300)).toEqual(expected);
+    expect(linear(6, 300)).toEqual(expected);
   });
 });

lib/movementtype.class.spec.ts renamed to lib/movementtype.function.spec.ts

@@ -0,0 +1,14 @@
+export const linear = (
+  amountOfSteps: number,
+  speedInPixelsPerSecond: number,
+): number[] => {
+  const timeSteps = [];
+  let stepDuration = Math.floor((1 / speedInPixelsPerSecond) * 1000);
+  if (stepDuration <= 0) {
+    stepDuration = 1;
+  }
+  for (let idx = 0; idx < amountOfSteps; ++idx) {
+    timeSteps.push(stepDuration);
+  }
+  return timeSteps;
+};