Add test coverage for Python version discovery with prereleases (#6823)

Coverage for #6813 — reverting that
commit causes the 3.11.0b0 test case to fail.

crates/uv-python/src/lib.rs

@@ -1849,6 +1849,58 @@ mod tests {
  Ok(())
  }
 
+ #[test]
+ fn find_python_all_minors_prerelease() -> Result<()> {
+ let mut context = TestContext::new()?;
+ context.add_python_interpreters(&[
+ (true, ImplementationName::CPython, "python", "3.10.0"),
+ (true, ImplementationName::CPython, "python3", "3.10.0"),
+ (true, ImplementationName::CPython, "python3.11", "3.11.0b0"),
+ ])?;
+
+ let python = context.run(|| {
+ find_python_installation(
+ &PythonRequest::parse(">= 3.11"),
+ EnvironmentPreference::Any,
+ PythonPreference::OnlySystem,
+ &context.cache,
+ )
+ })??;
+ assert_eq!(
+ python.interpreter().python_full_version().to_string(),
+ "3.11.0b0",
+ "We should find the 3.11 prerelease even though >=3.11 would normally exclude prereleases"
+ );
+
+ Ok(())
+ }
+
+ #[test]
+ fn find_python_all_minors_prerelease_next() -> Result<()> {
+ let mut context = TestContext::new()?;
+ context.add_python_interpreters(&[
+ (true, ImplementationName::CPython, "python", "3.10.0"),
+ (true, ImplementationName::CPython, "python3", "3.10.0"),
+ (true, ImplementationName::CPython, "python3.12", "3.12.0b0"),
+ ])?;
+
+ let python = context.run(|| {
+ find_python_installation(
+ &PythonRequest::parse(">= 3.11"),
+ EnvironmentPreference::Any,
+ PythonPreference::OnlySystem,
+ &context.cache,
+ )
+ })??;
+ assert_eq!(
+ python.interpreter().python_full_version().to_string(),
+ "3.12.0b0",
+ "We should find the 3.12 prerelease"
+ );
+
+ Ok(())
+ }
+
  #[test]
  fn find_python_pypy_prefers_executable_with_implementation_name() -> Result<()> {
  let mut context = TestContext::new()?;