Add tests to Math (#423)

* Add prettier config

* test: add test to check for absolute function

* chore: es5 to es6

* test: add test to check mean function

* test: add test for sum of digit

* test: add test for factorial

* test: add test for fibonnaci

* test: add test for find HCF

* test: add test for lcm

* test: add gridget test

* test: add test for mean square error

* test: add test for modular binary exponentiation

* test: add tests for palindrome

* test: add test for pascals triangle

* test: add tests for polynomial

* test: add tests for prime check

* test: add tests for reverse polish notation

* test: add tests for sieve of eratosthenes

* test: add tests for pi estimation monte carlo method

* chore: move tests to test folder

* chore: fix standardjs errors

Maths/test/PascalTriangle.test.js

@@ -0,0 +1,20 @@
+import { generate } from '../PascalTriangle'
+
+describe('Pascals Triangle', () => {
+  it('should have the the same length as the number', () => {
+    const pascalsTriangle = generate(5)
+    expect(pascalsTriangle.length).toEqual(5)
+  })
+  it('should have same length as its index in the array', () => {
+    const pascalsTriangle = generate(5)
+    pascalsTriangle.forEach((arr, index) => {
+      expect(arr.length).toEqual(index + 1)
+    })
+  })
+  it('should return an array of arrays', () => {
+    const pascalsTriangle = generate(3)
+    expect(pascalsTriangle).toEqual(
+      expect.arrayContaining([[1], [1, 1], [1, 2, 1]])
+    )
+  })
+})