PGN issues

Tests/FischerCoreTests/PGN/KasparovPGNFileTests.swift

@@ -0,0 +1,28 @@
+import Foundation
+import Testing
+@testable import FischerCore
+
+final class KasparovPGNFileTests {
+    @Test("Kasparov PGN file parses all games")
+    func parseKasparovPGNFileFromResources() async throws {
+        let fileURL = try #require(
+            Bundle.module.url(forResource: "garry-kasparov-on-gk-part-1", withExtension: "pgn")
+        )
+
+        let fileContents = try String(contentsOf: fileURL, encoding: .isoLatin1)
+        let firstTagIndex = try #require(fileContents.firstIndex(of: "["))
+        let pgn = fileContents[firstTagIndex...]
+        let eventTagCount = fileContents
+            .split(separator: "\n", omittingEmptySubsequences: false)
+            .filter { $0.hasPrefix("[Event ") }
+            .count
+        let games = try BasicPGNParser().parse(String(pgn))
+
+        #expect(fileContents.contains("% BOOKTITLE = Kasparov on Kasparov 1973-85"))
+        #expect(eventTagCount == 137)
+        #expect(games.count == 137)
+        #expect(games.count == eventTagCount)
+        #expect(games.first?.tags[.white] == "About this Publication")
+        #expect(games.last?.tags[.event] == "100: World Championship Match, Moscow")
+    }
+}