Issue/674 tdd the chess glossary open file term class (#688)

* Implemented Chess\Glossary\OpenFileTerm

* TDDed Chess\Glossary\OpenFileTerm

* Added test

* Added test

* Added test

* Wording

* TDDed Chess\Glossary\OpenFileTerm

src/Glossary/OpenFileTerm.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Chess\Glossary;
+
+use Chess\Variant\AbstractBoard;
+use Chess\Variant\Classical\PGN\AN\Piece;
+
+class OpenFileTerm extends AbstractTerm
+{
+    use ElaborateTermTrait;
+
+    const NAME = 'Open file';
+
+    public function __construct(AbstractBoard $board)
+    {
+        $this->board = $board;
+
+        for ($i = 0; $i < $this->board->square::SIZE['files']; $i++) {
+            $this->toElaborate[] = chr(97 + $i);
+            for ($j = 0; $j < $this->board->square::SIZE['ranks']; $j++) {
+                if ($piece = $this->board->pieceBySq($this->board->square->toAlgebraic($i, $j))) {
+                    if ($piece->id === Piece::P) {
+                        array_pop($this->toElaborate);
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    public function elaborate(): array
+    {
+        $count = count($this->toElaborate);
+        if ($count > 0 && $count < 4) {
+            $imploded = implode(', ', $this->toElaborate);
+            $this->elaboration[] = "These are open files with no pawns of either color on it: $imploded.";
+        }
+
+        return $this->elaboration;
+    }
+}

tests/unit/Glossary/OpenFileTermTest.php

@@ -0,0 +1,104 @@
+<?php
+
+namespace Chess\Tests\Unit\Eval;
+
+use Chess\FenToBoardFactory;
+use Chess\Glossary\OpenFileTerm;
+use Chess\Tests\AbstractUnitTestCase;
+
+class OpenFileTermTest extends AbstractUnitTestCase
+{
+    /**
+     * @test
+     */
+    public function kaufman_06()
+    {
+        $expectedElaboration = [
+            "These are open files with no pawns of either color on it: c.",
+        ];
+
+        $board = FenToBoardFactory::create('r5k1/3n1ppp/1p6/3p1p2/3P1B2/r3P2P/PR3PP1/2R3K1 b - -');
+
+        $openFileTerm = new OpenFileTerm($board);
+
+        $this->assertSame($expectedElaboration, $openFileTerm->elaborate());
+    }
+
+    /**
+     * @test
+     */
+    public function kaufman_07()
+    {
+        $expectedElaboration = [
+        ];
+
+        $board = FenToBoardFactory::create('2r2rk1/1bqnbpp1/1p1ppn1p/pP6/N1P1P3/P2B1N1P/1B2QPP1/R2R2K1 b - -');
+
+        $openFileTerm = new OpenFileTerm($board);
+
+        $this->assertSame($expectedElaboration, $openFileTerm->elaborate());
+    }
+
+    /**
+     * @test
+     */
+    public function kaufman_09()
+    {
+        $expectedElaboration = [
+            "These are open files with no pawns of either color on it: c.",
+        ];
+
+        $board = FenToBoardFactory::create('r3k2r/pbn2ppp/8/1P1pP3/P1qP4/5B2/3Q1PPP/R3K2R w KQkq -');
+
+        $openFileTerm = new OpenFileTerm($board);
+
+        $this->assertSame($expectedElaboration, $openFileTerm->elaborate());
+    }
+
+    /**
+     * @test
+     */
+    public function kaufman_14()
+    {
+        $expectedElaboration = [
+            "These are open files with no pawns of either color on it: b, d, e.",
+        ];
+
+        $board = FenToBoardFactory::create('1r2r1k1/p4p1p/6pB/q7/8/3Q2P1/PbP2PKP/1R3R2 w - -');
+
+        $openFileTerm = new OpenFileTerm($board);
+
+        $this->assertSame($expectedElaboration, $openFileTerm->elaborate());
+    }
+
+    /**
+     * @test
+     */
+    public function kaufman_15()
+    {
+        $expectedElaboration = [
+            "These are open files with no pawns of either color on it: c, d.",
+        ];
+
+        $board = FenToBoardFactory::create('r2q1r1k/pb3p1p/2n1p2Q/5p2/8/3B2N1/PP3PPP/R3R1K1 w - -');
+
+        $openFileTerm = new OpenFileTerm($board);
+
+        $this->assertSame($expectedElaboration, $openFileTerm->elaborate());
+    }
+
+    /**
+     * @test
+     */
+    public function kaufman_20()
+    {
+        $expectedElaboration = [
+        ];
+
+        $board = FenToBoardFactory::create('8/5p2/pk2p3/4P2p/2b1pP1P/P3P2B/8/7K w - -');
+
+        $openFileTerm = new OpenFileTerm($board);
+
+        $this->assertSame($expectedElaboration, $openFileTerm->elaborate());
+    }
+}