Add testCase

src/__tests__/matrix/projection.js

@@ -0,0 +1,20 @@
+import { toBeDeepCloseTo } from 'jest-matcher-deep-close-to';
+
+import { Matrix, projection } from '../..';
+
+expect.extend({ toBeDeepCloseTo });
+
+describe('Projection', () => {
+  it('Projection I', () => {
+    let vector = new Matrix([1, 2, 3]);
+    let vectorSpace = new Matrix([[2, 5, -1], [-2, 1, 1]]);
+
+    let projVector = Matrix.empty(1, 3);
+
+    let expected = new Matrix([-2 / 5, 2, 1 / 5]);
+
+    projVector = projection(vector, vectorSpace);
+
+    expect(projVector).toBeDeepCloseTo(expected);
+  });
+});