chore: checkpoint before Python removal

vendor/semver/tests/util/mod.rs

@@ -0,0 +1,54 @@
+#![allow(dead_code)]
+
+use semver::{BuildMetadata, Comparator, Error, Prerelease, Version, VersionReq};
+use std::fmt::Display;
+
+#[track_caller]
+pub(super) fn version(text: &str) -> Version {
+    Version::parse(text).unwrap()
+}
+
+#[track_caller]
+pub(super) fn version_err(text: &str) -> Error {
+    Version::parse(text).unwrap_err()
+}
+
+#[track_caller]
+pub(super) fn req(text: &str) -> VersionReq {
+    VersionReq::parse(text).unwrap()
+}
+
+#[track_caller]
+pub(super) fn req_err(text: &str) -> Error {
+    VersionReq::parse(text).unwrap_err()
+}
+
+#[track_caller]
+pub(super) fn comparator(text: &str) -> Comparator {
+    Comparator::parse(text).unwrap()
+}
+
+#[track_caller]
+pub(super) fn comparator_err(text: &str) -> Error {
+    Comparator::parse(text).unwrap_err()
+}
+
+#[track_caller]
+pub(super) fn prerelease(text: &str) -> Prerelease {
+    Prerelease::new(text).unwrap()
+}
+
+#[track_caller]
+pub(super) fn prerelease_err(text: &str) -> Error {
+    Prerelease::new(text).unwrap_err()
+}
+
+#[track_caller]
+pub(super) fn build_metadata(text: &str) -> BuildMetadata {
+    BuildMetadata::new(text).unwrap()
+}
+
+#[track_caller]
+pub(super) fn assert_to_string(value: impl Display, expected: &str) {
+    assert_eq!(value.to_string(), expected);
+}