Updated the test system

test/degreesToRads.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const {degreesToRads} = require('./_30s.js');
+
+// const approxeq = (v1,v2, diff = 0.001) => Math.abs(v1 - v2) < diff;
+test('degreesToRads is a Function', () => {
+  expect(degreesToRads).toBeInstanceOf(Function);
+});
+test('Returns the appropriate value', () => {
+  expect(degreesToRads(90.0)).toBeCloseTo(Math.PI / 2, 3);
+});