day 1

README.md

@@ -1,6 +1,6 @@
 # Aoc2023
 
-AOC 2023 using TDD
+[AOC 2023](https://adventofcode.com/2023) using TDD
 
 <a alt="Nx logo" href="https://nx.dev" target="_blank" rel="noreferrer"><img src="https://raw.githubusercontent.com/nrwl/nx/master/images/nx-logo.png" width="45"></a>
 

src/__tests__/day1.test.ts

@@ -0,0 +1,56 @@
+// Only for testing purposes, it helps to write tests for the functions before writing the functions themselves
+// declare function turnLineInto2DigitNumber(line: string): number;
+// declare function turnEachLineInto2DigitNumber(lines: string): number[];
+// declare function sumOf2DigitNumbers(numbers: number[]): number;
+// declare function preProcess(line: string): string;
+
+const input1 = `1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet`;
+
+import {
+  preProcess,
+  sumOf2DigitNumbers,
+  turnEachLineInto2DigitNumber,
+  turnLineInto2DigitNumber,
+} from '../day1';
+
+import { data1 } from '../data/data1';
+
+describe('day1', () => {
+  it('should turn line into a 2 digit number by taking the first and last integer to occur in the line', () => {
+    expect(turnLineInto2DigitNumber('1abc2')).toEqual(12);
+    expect(turnLineInto2DigitNumber('pqr3stu8vwx')).toEqual(38);
+    expect(turnLineInto2DigitNumber('a1b2c3d4e5f')).toEqual(15);
+    expect(turnLineInto2DigitNumber('treb7uchet')).toEqual(77);
+    expect(turnLineInto2DigitNumber('11abc2')).toEqual(12);
+  });
+
+  it('should turn each line into a 2 digit number', () => {
+    expect(turnEachLineInto2DigitNumber(input1)).toEqual([12, 38, 15, 77]);
+  });
+
+  it('correct preProcess line', () => {
+    expect(preProcess('one')).toEqual('1ne');
+    expect(preProcess('two')).toEqual('2wo');
+    expect(preProcess('three')).toEqual('3hree');
+    expect(preProcess('four')).toEqual('4our');
+    expect(preProcess('five')).toEqual('5ive');
+    expect(preProcess('six')).toEqual('6ix');
+    expect(preProcess('seven')).toEqual('7even');
+    expect(preProcess('eight')).toEqual('8ight');
+    expect(preProcess('nine')).toEqual('9ine');
+    expect(preProcess('one two three four five six seven eight nine')).toEqual(
+      '1ne 2wo 3hree 4our 5ive 6ix 7even 8ight 9ine'
+    );
+  });
+
+  it('should sum all the 2 digit numbers', () => {
+    expect(sumOf2DigitNumbers(turnEachLineInto2DigitNumber(input1))).toBe(142);
+    expect(sumOf2DigitNumbers(turnEachLineInto2DigitNumber(data1))).toBe(54338);
+    expect(
+      sumOf2DigitNumbers(turnEachLineInto2DigitNumber(data1, preProcess))
+    ).toBe(53389);
+  });
+});