refactor: 2015 Day 8

Refactor part 1 of day 8 of 2015

2015/day/1/index.test.ts

@@ -4,36 +4,29 @@ import { getInput } from '../../../utils/file';
 
 const input = await getInput(__dirname);
 
-describe('Day 1', () => {
-  describe('Part 1', () => {
-    it('should return floor number', () => {
-      expect.assertions(10);
-
-      expect(part1('(())')).toStrictEqual(0);
-      expect(part1('()()')).toStrictEqual(0);
-
-      expect(part1('(((')).toStrictEqual(3);
-      expect(part1('(()(()(')).toStrictEqual(3);
-
-      expect(part1('))(((((')).toStrictEqual(3);
-
-      expect(part1('())')).toStrictEqual(-1);
-      expect(part1('))(')).toStrictEqual(-1);
-
-      expect(part1(')))')).toStrictEqual(-3);
-      expect(part1(')())())')).toStrictEqual(-3);
-
-      expect(part1(input)).toStrictEqual(280);
+describe('2015', () => {
+  describe('Day 1', () => {
+    describe('Part 1', () => {
+      it('should return floor number', () => {
+        expect(part1('(())')).toBe(0);
+        expect(part1('()()')).toBe(0);
+        expect(part1('(((')).toBe(3);
+        expect(part1('(()(()(')).toBe(3);
+        expect(part1('))(((((')).toBe(3);
+        expect(part1('())')).toBe(-1);
+        expect(part1('))(')).toBe(-1);
+        expect(part1(')))')).toBe(-3);
+        expect(part1(')())())')).toBe(-3);
+        expect(part1(input)).toBe(280);
+      });
     });
-  });
-
-  describe('Part 2', () => {
-    it('should return index of the first character to enter the basement', () => {
-      expect.assertions(3);
 
-      expect(part2(')')).toStrictEqual(1);
-      expect(part2('()())')).toStrictEqual(5);
-      expect(part2(input)).toStrictEqual(1797);
+    describe('Part 2', () => {
+      it('should return index of the first character to enter the basement', () => {
+        expect(part2(')')).toBe(1);
+        expect(part2('()())')).toBe(5);
+        expect(part2(input)).toBe(1797);
+      });
     });
   });
 });

2015/day/8/index.test.ts

@@ -1,16 +1,17 @@
-import { readFile } from 'node:fs/promises';
 import { describe, expect, it } from 'vitest';
 import { part1 } from '.';
+import { getInput } from '../../../utils/file';
+import { NEWLINE } from '../../../utils/string';
 
-const input = (await readFile(`${__dirname}/input`, 'utf-8')).split('\n');
+const input = (await getInput(__dirname)).split(NEWLINE);
 
-describe('Day 8', () => {
-  describe('Part 1', () => {
-    it('should return the number of characters', () => {
-      expect.assertions(2);
-
-      expect(part1(['""', '"abc"', '"aaa\\"aaa"', '"\\x27"'])).toStrictEqual(12);
-      expect(part1(input)).toStrictEqual(1350);
+describe('2015', () => {
+  describe('Day 8', () => {
+    describe('Part 1', () => {
+      it('should return the number of characters', () => {
+        expect(part1(['""', '"abc"', '"aaa\\"aaa"', '"\\x27"'])).toBe(12);
+        expect(part1(input)).toBe(1350);
+      });
     });
   });
 });

2015/day/8/index.ts

@@ -1,10 +1,20 @@
 /* eslint-disable import/prefer-default-export, no-eval */
 
+import { sum } from '../../../utils/math';
+
+function mapString(str: string): number {
+  const { length: totalCharacters } = str;
+  const { length: totalCharactersInMemory } = eval(str);
+
+  return totalCharacters - totalCharactersInMemory;
+}
+
+function mapStrings(strs: string[]): number[] {
+  return strs.map(mapString);
+}
+
 function part1(input: string[]): number {
-  return input.reduce(
-    (accumulator, currentValue) => accumulator + currentValue.length - eval(currentValue).length,
-    0,
-  );
+  return sum(mapStrings(input));
 }
 
 export { part1 };