alamb commented on a change in pull request #1621:
URL: https://github.com/apache/arrow-datafusion/pull/1621#discussion_r789164614
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File path: datafusion/tests/sql/expr.rs
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@@ -499,6 +499,16 @@ async fn test_interval_expressions() -> Result<()> {
Ok(())
}
+#[cfg(feature = "unicode_expressions")]
Review comment:
I did not find one either.
You could potentially use the `#[should_panic` annotation. For example,
something like (untested):
```rust
#[tokio::test]
#[should_panic(expected = "negative substring length not allowed")]
async fn test_substring_expr_bad() -> Result<()> {
test_expression!("substring('alphabet' from -1 for 1)", "l");
}
```
A helper would be great
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