feat(2015-01): Add day 1

AdventOfCode JS/2015/Day01.test.js

@@ -0,0 +1,77 @@
+const fs = require("fs");
+const path = require("path");
+
+describe("2015 Day 01", () => {
+  let realData;
+
+  beforeAll(() => {
+    const filePath = path.resolve(__dirname, "./Data/Day01.dat");
+    realData = fs.readFileSync(filePath, "utf-8").split("\n");
+  });
+
+  function part1(input) {
+    const data = input ? input : realData;
+
+    // Go through each character and add 1 for ( and -1 for )
+    let floor = 0;
+
+    // for each character in data
+    data.split("").forEach((character) => {
+      if (character === "(") {
+        floor++;
+      } else if (character === ")") {
+        floor--;
+      }
+    });
+
+    return floor;
+  }
+
+  function part2(input) {
+    const data = input ? input : realData;
+
+    // Go through each character and add 1 for ( and -1 for )
+    let floor = 0;
+
+    // for each character in data
+    for (let index = 0; index < data.length; index++) {
+      const character = data[index];
+      if (character === "(") {
+        floor++;
+      } else if (character === ")") {
+        floor--;
+      }
+
+      if (floor < 0) {
+        return index + 1;
+      }
+    }
+
+    throw new Error("Never went below 0");
+  }
+
+  test.each([
+    ["(())", 0],
+    ["()()", 0],
+    ["(((", 3],
+    ["(()(()(", 3],
+    ["))(((((", 3],
+    ["())", -1],
+    ["))(", -1],
+    [")))", -3],
+    [")())())", -3],
+    [null, 232], // The actual answer
+  ])("Part 1: %s -> %i", (input, expected) => {
+    const result = part1(input ? input : realData.join("\n"));
+    expect(result).toBe(expected);
+  });
+
+  test.each([
+    [")", 1],
+    ["()())", 5],
+    [null, 1783], // The actual answer
+  ])("Part 2: %s -> %i", (input, expected) => {
+    const result = part2(input ? input : realData.join("\n"));
+    expect(result).toBe(expected);
+  });
+});