feat: temporary grammar

InkBlot.Tests/LexerTest.cs

@@ -0,0 +1,34 @@
+using Antlr4.Runtime;
+using Shouldly;
+
+namespace InkBlot.Tests;
+
+public class LexerTest
+{
+    [Fact]
+    public void TestDivertForLexer()
+    {
+        var divertTokens = GetTokens("<- threadName");
+        divertTokens.ShouldSatisfyAllConditions(
+            () => divertTokens[0].Text.ShouldBe("<-"),
+            () => divertTokens[0].Type.ShouldBe(InkBlotAntlrGrammarLexer.THREAD_ARROW),
+            () => divertTokens[1].Text.ShouldBe(" "),
+            () => divertTokens[1].Type.ShouldBe(InkBlotAntlrGrammarLexer.WS),
+            () => divertTokens[2].Text.ShouldBe("threadName"),
+            () => divertTokens[2].Type.ShouldBe(InkBlotAntlrGrammarLexer.IDENTIFIER),
+            () => divertTokens[3].Text.ShouldBe("<EOF>"),
+            () => divertTokens[3].Type.ShouldBe(InkBlotAntlrGrammarLexer.Eof)
+        );
+    }
+
+    private IList<IToken> GetTokens(string text)
+    {
+        var fileReader = new InMemoryFileReader([
+            ("main.ink", text)
+        ]);
+        var tokensStream = InkBlotParser.GetTokenStream(fileReader, "main.ink");
+        tokensStream.Fill();
+        var tokens = tokensStream.GetTokens();
+        return tokens;
+    }
+}