lidavidm commented on code in PR #34312:
URL: https://github.com/apache/arrow/pull/34312#discussion_r1150840663


##########
java/dataset/src/test/java/org/apache/arrow/dataset/file/TestFileSystemDataset.java:
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@@ -386,6 +388,27 @@ public void testBaseCsvRead() throws Exception {
     }
   }
 
+  @Test
+  public void testResourceToLoad() throws IOException {
+    if (System.getProperty("os.name").equalsIgnoreCase("Windows")) {
+      assertEquals("\\", File.separator);
+      final String pathWithoutFileSeparator = "/" + "avroschema" + "/" + 
"user.avsc";
+      try (final InputStream stream = 
TestFileSystemDataset.class.getResourceAsStream(pathWithoutFileSeparator)) {
+        if (stream == null) {
+          throw new FileNotFoundException(pathWithoutFileSeparator);
+        }
+      }
+      final String pathWithFileSeparator = File.separator + "avroschema" + 
File.separator + "user.avsc";
+      Assertions.assertThrows(FileNotFoundException.class, () -> {
+        try (final InputStream stream = 
TestFileSystemDataset.class.getResourceAsStream(pathWithFileSeparator)) {
+          if (stream == null) {
+            throw new FileNotFoundException(pathWithFileSeparator);
+          }
+        }
+      }, "FileNotFound \\avroschema\\user.avsc");
+    }
+  }
+

Review Comment:
   I don't see why we're testing the Java standard library here. My previous 
review was asking why this issue was not caught by any test at all on Windows: 
it implies that we don't test any of this JNI code on Windows, and that is the 
real issue I want to fix.



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