Added BinaryToHex Conversion

Conversions/test/BinaryToHex.test.js

@@ -0,0 +1,19 @@
+import binaryToHex from '../BinaryToHex'
+
+describe('BinaryToHex', () => {
+  it('expects to return correct hexadecimal value', () => {
+    expect(binaryToHex('1000')).toBe('8')
+  })
+
+  it('expects to return correct hexadecimal value for more than one hex digit', () => {
+    expect(binaryToHex('11101010')).toBe('EA')
+  })
+
+  it('expects to return correct hexadecimal value for padding-required binary', () => {
+    expect(binaryToHex('1001101')).toBe('4D')
+  })
+
+  it('expects to return correct hexadecimal value, matching (num).toString(16)', () => {
+    expect(binaryToHex('1111')).toBe(parseInt('1111', 2).toString(16).toUpperCase())
+  })
+})