lexer extension unit test

b3b00 · Jun 4, 2019 · 28275f5 · 28275f5
1 parent fc2c4c3
commit 28275f5
Showing 1 changed file with 21 additions and 0 deletions.
diff --git a/ParserTests/lexer/GenericLexerTests.cs b/ParserTests/lexer/GenericLexerTests.cs
@@ -341,6 +341,27 @@ public void TestExtensions()
             tok = tokens[0];
             Assert.Equal(Extensions.CHAINE, tok.TokenID);
             Assert.Equal("'et voilà'", tokens[0].Value);
+        }
+
+        [Fact]
+        public void TestExtensionsPreconditionFailure()
+        {
+            var lexerRes =
+                LexerBuilder.BuildLexer(new BuildResult<ILexer<Extensions>>(), ExtendedGenericLexer.AddExtension);
+            Assert.False(lexerRes.IsError);
+            var lexer = lexerRes.Result as GenericLexer<Extensions>;
+            Assert.NotNull(lexer);
+
+            var err = Assert.Throws<LexerException>(() => lexer.Tokenize("0.0.2018"));
+            var lexErr = err as LexerException;
+            Assert.Equal(0,lexErr.Error.Line);
+            Assert.Equal(3,lexErr.Error.Column);
+            Assert.Equal('.',lexErr.Error.UnexpectedChar);
+            ;
+
+
+
+
         }
 
         [Fact]