From f5c67f966b7d64c049c48c6bcca451db11970552 Mon Sep 17 00:00:00 2001
From: Paul Irwin <paulirwin@gmail.com>
Date: Sat, 12 Aug 2023 09:02:05 -0600
Subject: [PATCH] Tests: Add negative test for Java 9 underscore identifier,
 #53

This adds a new xUnit Theory for tests that are expected to fail
parsing.
---
 JavaToCSharp.Tests/IntegrationTests.cs        | 20 ++++++++++++++++++-
 .../Resources/Java9Underscore.java            |  9 +++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 JavaToCSharp.Tests/Resources/Java9Underscore.java

diff --git a/JavaToCSharp.Tests/IntegrationTests.cs b/JavaToCSharp.Tests/IntegrationTests.cs
index 59c2d44d..9b0e52f5 100644
--- a/JavaToCSharp.Tests/IntegrationTests.cs
+++ b/JavaToCSharp.Tests/IntegrationTests.cs
@@ -19,7 +19,10 @@ public class IntegrationTests
     [InlineData("Resources/TestNumericDocValuesUpdates.java")]
     public void GeneralSuccessfulConversionTest(string filePath)
     {
-        var options = new JavaConversionOptions();
+        var options = new JavaConversionOptions
+        {
+            IncludeComments = false,
+        };
         
         options.WarningEncountered += (_, eventArgs)
             => throw new InvalidOperationException($"Encountered a warning in conversion: {eventArgs.Message}");
@@ -28,6 +31,21 @@ public void GeneralSuccessfulConversionTest(string filePath)
         Assert.NotNull(parsed);
     }
 
+    [Theory]
+    [InlineData("Resources/Java9Underscore.java")]
+    public void GeneralUnsuccessfulConversionTest(string filePath)
+    {
+        var options = new JavaConversionOptions
+        {
+            IncludeComments = false,
+        };
+        
+        options.WarningEncountered += (_, eventArgs)
+            => throw new InvalidOperationException($"Encountered a warning in conversion when we expected a failure: {eventArgs.Message}");
+        
+        Assert.ThrowsAny<Exception>(() => JavaToCSharpConverter.ConvertText(File.ReadAllText(filePath), options));
+    }
+
     [Theory]
     [InlineData("Resources/HelloWorld.java")]
     [InlineData("Resources/Java7BasicTryWithResources.java")]
diff --git a/JavaToCSharp.Tests/Resources/Java9Underscore.java b/JavaToCSharp.Tests/Resources/Java9Underscore.java
new file mode 100644
index 00000000..1b1307ce
--- /dev/null
+++ b/JavaToCSharp.Tests/Resources/Java9Underscore.java
@@ -0,0 +1,9 @@
+// Throws an exception parsing as of Java 9
+package example;
+
+public class Program {
+    public static void main(String[] args) {
+       String _ = "Hello world!";
+       System.out.println(_);
+    }
+}