test: add tests for getFEN

server/src/__test__/getFEN.test.ts

@@ -0,0 +1,36 @@
+import { describe, expect, test } from "vitest";
+import Chess, { DEFAULT_POSITION } from "../chess/engine";
+
+test("starting position", () => {
+  expect(Chess.load(DEFAULT_POSITION).getFEN()).toBe(DEFAULT_POSITION);
+});
+
+test("1. e4", () => {
+  const fen = "rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3 0 1";
+  expect(Chess.load(fen).getFEN()).toBe(fen);
+});
+
+test("1. e4 2. e5", () => {
+  const fen = "rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq e6 0 2";
+  expect(Chess.load(fen).getFEN()).toBe(fen);
+});
+
+test("1. e4 2. e5 3. ke2", () => {
+  const fen = "rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPPKPPP/RNBQ1BNR b kq - 1 2";
+  expect(Chess.load(fen).getFEN()).toBe(fen);
+});
+
+test("random position 1", () => {
+  const fen = "r1b1r1k1/pp4pp/3Bpp2/8/2q5/P5Q1/3R1PPP/R5K1 b - - 0 19";
+  expect(Chess.load(fen).getFEN()).toBe(fen);
+});
+
+test("random position 2", () => {
+  const fen = "1k6/1pp5/p7/5B1p/PP6/6K1/4p2r/4R3 b - - 3 43";
+  expect(Chess.load(fen).getFEN()).toBe(fen);
+});
+
+test("random position 3", () => {
+  const fen = "8/8/2k2Q2/8/5P2/8/1p6/6K1 b - - 1 48";
+  expect(Chess.load(fen).getFEN()).toBe(fen);
+});

server/src/__test__/loadFEN.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, test } from "vitest";
-import Chess, { COLOR, PIECE } from "../../chess/engine";
+import Chess, { COLOR, PIECE } from "../chess/engine";
 
 describe("valid FEN strings", () => {
   test("default", () => {

server/src/__test__/validateFEN.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, test } from "vitest";
-import { DEFAULT_POSITION, validateFEN } from "../../chess/engine";
+import { DEFAULT_POSITION, validateFEN } from "../chess/engine";
 
 describe("valid FEN strings", () => {
   test("starting position", () => {