test(2019-day-02): specs for opp code behaviors

Author: developher-net

2019/day-02/intcodeParser.test.js

@@ -0,0 +1,30 @@
+/* eslint-env mocha */
+const expect = require('chai').expect
+const { step } = require('./intcodeParser')
+
+describe('--- 2019 Day 2: 1202 Program Alarm ---', () => {
+  describe('Part 1', () => {
+    describe('intcodeParser', () => {
+      describe('step()', () => {
+        it('can add', () => {
+          const oppcode = 1
+          const data = [oppcode, 5, 6, 3, 99, 2, 3]
+          step({ position: 0, data })
+          expect(data[3]).equals(5)
+        })
+        it('can multiply', () => {
+          const oppcode = 2
+          const data = [oppcode, 5, 6, 3, 99, 2, 3]
+          step({ position: 0, data })
+          expect(data[3]).equals(6)
+        })
+        it('can terminate', () => {
+          const oppcode = 99
+          const data = [oppcode, 5, 6, 3, 99, 2, 3]
+          step({ position: 0, data })
+          expect(data[3]).equals(3)
+        })
+      })
+    })
+  })
+})