211 lines
5.4 KiB
Go
211 lines
5.4 KiB
Go
package chess_test
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import (
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"fmt"
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"os"
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"path"
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"testing"
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"github.com/ekzyis/chessbot/chess"
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"github.com/stretchr/testify/assert"
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)
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func init() {
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// change working directory to the root of the project
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// so assets/ can be found
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wd, _ := os.Getwd()
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os.Chdir(path.Dir(wd))
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}
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func TestBoardInitial(t *testing.T) {
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b := chess.NewBoard()
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assertPiece(t, b, "a1", chess.Rook, chess.Light)
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assertPiece(t, b, "b1", chess.Knight, chess.Light)
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assertPiece(t, b, "c1", chess.Bishop, chess.Light)
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assertPiece(t, b, "d1", chess.Queen, chess.Light)
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assertPiece(t, b, "e1", chess.King, chess.Light)
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assertPiece(t, b, "f1", chess.Bishop, chess.Light)
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assertPiece(t, b, "g1", chess.Knight, chess.Light)
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assertPiece(t, b, "h1", chess.Rook, chess.Light)
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assertPiece(t, b, "a2", chess.Pawn, chess.Light)
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assertPiece(t, b, "b2", chess.Pawn, chess.Light)
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assertPiece(t, b, "c2", chess.Pawn, chess.Light)
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assertPiece(t, b, "d2", chess.Pawn, chess.Light)
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assertPiece(t, b, "e2", chess.Pawn, chess.Light)
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assertPiece(t, b, "f2", chess.Pawn, chess.Light)
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assertPiece(t, b, "g2", chess.Pawn, chess.Light)
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assertPiece(t, b, "h2", chess.Pawn, chess.Light)
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assertPiece(t, b, "a8", chess.Rook, chess.Dark)
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assertPiece(t, b, "b8", chess.Knight, chess.Dark)
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assertPiece(t, b, "c8", chess.Bishop, chess.Dark)
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assertPiece(t, b, "d8", chess.Queen, chess.Dark)
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assertPiece(t, b, "e8", chess.King, chess.Dark)
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assertPiece(t, b, "f8", chess.Bishop, chess.Dark)
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assertPiece(t, b, "g8", chess.Knight, chess.Dark)
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assertPiece(t, b, "h8", chess.Rook, chess.Dark)
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assertPiece(t, b, "a7", chess.Pawn, chess.Dark)
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assertPiece(t, b, "b7", chess.Pawn, chess.Dark)
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assertPiece(t, b, "c7", chess.Pawn, chess.Dark)
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assertPiece(t, b, "d7", chess.Pawn, chess.Dark)
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assertPiece(t, b, "e7", chess.Pawn, chess.Dark)
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assertPiece(t, b, "f7", chess.Pawn, chess.Dark)
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assertPiece(t, b, "g7", chess.Pawn, chess.Dark)
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assertPiece(t, b, "h7", chess.Pawn, chess.Dark)
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}
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func TestBoardMovePawn(t *testing.T) {
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b := chess.NewBoard()
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b.Move("e4")
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assertNoPiece(t, b, "e2")
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assertPiece(t, b, "e4", chess.Pawn, chess.Light)
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b.Move("e5")
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assertNoPiece(t, b, "e7")
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assertPiece(t, b, "e5", chess.Pawn, chess.Dark)
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}
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func TestBoardMovePawnInvalid(t *testing.T) {
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b := chess.NewBoard()
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assertMoveError(t, b, "a5", "no pawn found that can move to a5")
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assertMoveError(t, b, "b5", "no pawn found that can move to b5")
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assertMoveError(t, b, "c5", "no pawn found that can move to c5")
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assertMoveError(t, b, "d5", "no pawn found that can move to d5")
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assertMoveError(t, b, "e5", "no pawn found that can move to e5")
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assertMoveError(t, b, "f5", "no pawn found that can move to f5")
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assertMoveError(t, b, "g5", "no pawn found that can move to g5")
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assertMoveError(t, b, "h5", "no pawn found that can move to h5")
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b.Move("d4")
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assertMoveError(t, b, "a4", "no pawn found that can move to a4")
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assertMoveError(t, b, "b4", "no pawn found that can move to b4")
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assertMoveError(t, b, "c4", "no pawn found that can move to c4")
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assertMoveError(t, b, "d4", "no pawn found that can move to d4")
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assertMoveError(t, b, "e4", "no pawn found that can move to e4")
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assertMoveError(t, b, "f4", "no pawn found that can move to f4")
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assertMoveError(t, b, "g4", "no pawn found that can move to g4")
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assertMoveError(t, b, "h4", "no pawn found that can move to h4")
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}
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func TestBoardMovePawnCapture(t *testing.T) {
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b := chess.NewBoard()
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b.Move("e4")
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b.Move("d5")
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b.Move("exd5")
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assertNoPiece(t, b, "e4")
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assertPiece(t, b, "d5", chess.Pawn, chess.Light)
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}
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func TestBoardMoveKnight(t *testing.T) {
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b := chess.NewBoard()
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b.Move("Nf3")
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assertPiece(t, b, "f3", chess.Knight, chess.Light)
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assertNoPiece(t, b, "g1")
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b.Move("Nh6")
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assertPiece(t, b, "h6", chess.Knight, chess.Dark)
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assertNoPiece(t, b, "g8")
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}
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func TestBoardMoveBishop(t *testing.T) {
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b := chess.NewBoard()
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b.Move("Bc4")
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assertMoveError(t, b, "Bc4", "no bishop found that can move to c4")
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b.Move("e3")
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b.Move("e6")
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b.Move("Bc4")
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assertPiece(t, b, "c4", chess.Bishop, chess.Light)
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assertNoPiece(t, b, "f1")
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b.Move("Bc5")
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assertPiece(t, b, "c5", chess.Bishop, chess.Dark)
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assertNoPiece(t, b, "f8")
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}
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func TestBoardMoveRook(t *testing.T) {
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b := chess.NewBoard()
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b.Move("Ra3")
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assertMoveError(t, b, "Ra3", "no rook found that can move to a3")
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b.Move("a4")
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b.Move("a5")
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b.Move("Ra3")
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assertPiece(t, b, "a3", chess.Rook, chess.Light)
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assertNoPiece(t, b, "a1")
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b.Move("Ra6")
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assertPiece(t, b, "a6", chess.Rook, chess.Dark)
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assertNoPiece(t, b, "a8")
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}
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func TestBoardMoveQueen(t *testing.T) {
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b := chess.NewBoard()
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b.Move("Qd3")
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assertMoveError(t, b, "Qd3", "no queen found that can move to d3")
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b.Move("d4")
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b.Move("d5")
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b.Move("Qd3")
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assertPiece(t, b, "d3", chess.Queen, chess.Light)
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assertNoPiece(t, b, "d1")
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b.Move("Qd6")
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assertPiece(t, b, "d6", chess.Queen, chess.Dark)
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assertNoPiece(t, b, "d8")
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}
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func assertPiece(t *testing.T, b *chess.Board, position string, name chess.PieceName, color chess.Color) {
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p := b.At(position)
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c := "white"
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if color == chess.Dark {
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c = "black"
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}
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msg := fmt.Sprintf("expected %s %s at %s", c, name, position)
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if assert.NotNil(t, p, msg) {
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assert.Equal(t, name, p.Name, msg)
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assert.Equal(t, color, p.Color, msg)
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}
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}
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func assertNoPiece(t *testing.T, b *chess.Board, position string) {
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p := b.At(position)
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assert.Nil(t, p, "expected no piece at %s", position)
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}
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func assertMoveError(t *testing.T, b *chess.Board, position string, message string) {
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assert.ErrorContains(t, b.Move(position), message)
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}
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