qstommyshu commented on PR #15578:
URL: https://github.com/apache/datafusion/pull/15578#issuecomment-2779584934
Also, I found the test cases are a bit here and there, but I think the sql
test suite are too large to restructure now. I'm thinking maybe we can try to
use modules to separate different tests in future?
Here is an example:
```Rust
pub fn add(a: i32, b: i32) -> i32 {
a + b
}
pub fn multiply(a: i32, b: i32) -> i32 {
a * b
}
#[cfg(test)]
mod tests {
use super::*;
// add test module
mod add_tests {
use super::*;
#[test]
fn test_add_positive() {
assert_eq!(add(2, 3), 5);
}
#[test]
fn test_add_negative() {
assert_eq!(add(-2, -3), -5);
}
}
// multiply test module
mod multiply_tests {
use super::*;
#[test]
fn test_multiply_positive() {
assert_eq!(multiply(4, 5), 20);
}
#[test]
fn test_multiply_mixed() {
assert_eq!(multiply(-3, 6), -18);
}
}
// integration test module
mod integration_tests {
use super::*;
#[test]
fn test_combined_operations() {
let sum = add(2, 3);
let product = multiply(sum, 4);
assert_eq!(product, 20);
}
}
}
```
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