fix(npm): respect `latest` dist tag for getting current version (#15746)

1 files changed, 10 insertions, 1 deletions

diff --git a/test_util/src/npm.rs b/test_util/src/npm.rs
index fad59e3b8..6e393d835 100644
--- a/test_util/src/npm.rs
+++ b/test_util/src/npm.rs
@@ -71,6 +71,7 @@ fn get_npm_package(package_name: &str) -> Result<Option<CustomNpmPackage>> {
   // read all the package's versions
   let mut tarballs = HashMap::new();
   let mut versions = serde_json::Map::new();
+  let mut latest_version = semver::Version::parse("0.0.0").unwrap();
   for entry in fs::read_dir(&package_folder)? {
     let entry = entry?;
     let file_type = entry.file_type()?;
@@ -134,13 +135,21 @@ fn get_npm_package(package_name: &str) -> Result<Option<CustomNpmPackage>> {
     let mut version_info: serde_json::Map<String, serde_json::Value> =
       serde_json::from_str(&package_json_text)?;
     version_info.insert("dist".to_string(), dist.into());
-    versions.insert(version, version_info.into());
+    versions.insert(version.clone(), version_info.into());
+    let version = semver::Version::parse(&version)?;
+    if version.cmp(&latest_version).is_gt() {
+      latest_version = version;
+    }
   }
 
+  let mut dist_tags = serde_json::Map::new();
+  dist_tags.insert("latest".to_string(), latest_version.to_string().into());
+
   // create the registry file for this package
   let mut registry_file = serde_json::Map::new();
   registry_file.insert("name".to_string(), package_name.to_string().into());
   registry_file.insert("versions".to_string(), versions.into());
+  registry_file.insert("dist-tags".to_string(), dist_tags.into());
   Ok(Some(CustomNpmPackage {
     registry_file: serde_json::to_string(&registry_file).unwrap(),
     tarballs,