refactor(source_id): merge stable hash tests into one

Author: weihanglo

src/cargo/core/source_id.rs

@@ -792,16 +792,6 @@ mod tests {
     // the prefix components (e.g. `C:`), there is not way to have a
     // cross-platform stable hash for absolute paths.
     #[test]
-    fn test_cratesio_hash() {
-        let gctx = GlobalContext::default().unwrap();
-        let crates_io = SourceId::crates_io(&gctx).unwrap();
-        assert_eq!(crate::util::hex::short_hash(&crates_io), "83d63c3e13aca8cc");
-    }
-
-    // See the comment in `test_cratesio_hash`.
-    //
-    // Only test on non-Windows as paths on Windows will get different hashes.
-    #[test]
     fn test_stable_hash() {
         use std::hash::Hasher;
         use std::path::Path;

src/cargo/sources/registry/mod.rs

@@ -456,7 +456,7 @@ fn short_name(id: SourceId, is_shallow: bool) -> String {
     // CAUTION: This should not change between versions. If you change how
     // this is computed, it will orphan previously cached data, forcing the
     // cache to be rebuilt and potentially wasting significant disk space. If
-    // you change it, be cautious of the impact. See `test_cratesio_hash` for
+    // you change it, be cautious of the impact. See `test_stable_hash` for
     // a similar discussion.
     let hash = hex::short_hash(&id);
     let ident = id.url().host_str().unwrap_or("").to_string();