Add back tests removed in #18080

Author: LHolten

src/tools/rust-analyzer/crates/project-model/src/tests.rs

@@ -46,6 +46,39 @@ fn load_cargo_with_overrides(
 to_crate_graph(project_workspace)
 }
 
+fnload_cargo_with_fake_sysroot(
+file_map:&mutFxHashMap<AbsPathBuf,FileId>,
+file:&str,
+) -> (CrateGraph,ProcMacroPaths){
+let meta:Metadata = get_test_json_file(file);
+let manifest_path =
+ManifestPath::try_from(AbsPathBuf::try_from(meta.workspace_root.clone()).unwrap()).unwrap();
+let cargo_workspace = CargoWorkspace::new(meta, manifest_path,Default::default());
+let project_workspace = ProjectWorkspace{
+kind:ProjectWorkspaceKind::Cargo{
+cargo: cargo_workspace,
+build_scripts:WorkspaceBuildScripts::default(),
+rustc:Err(None),
+error:None,
+set_test:true,
+},
+sysroot:get_fake_sysroot(),
+rustc_cfg:Vec::new(),
+cfg_overrides:Default::default(),
+toolchain:None,
+target_layout:Err("target_data_layout not loaded".into()),
+};
+ project_workspace.to_crate_graph(
+&mut{
+ |path| {
+let len = file_map.len();
+Some(*file_map.entry(path.to_path_buf()).or_insert(FileId::from_raw(len asu32)))
+}
+},
+&Default::default(),
+)
+}
+
 fnload_rust_project(file:&str) -> (CrateGraph,ProcMacroPaths){
 let data = get_test_json_file(file);
 let project = rooted_project_json(data);
@@ -221,6 +254,34 @@ fn rust_project_is_proc_macro_has_proc_macro_dep() {
  crate_data.dependencies.iter().find(|&dep| dep.name.deref() == "proc_macro").unwrap();
 }
 
+#[test]
+fncrate_graph_dedup_identical(){
+let(mut crate_graph, proc_macros) =
+load_cargo_with_fake_sysroot(&mutDefault::default(),"regex-metadata.json");
+ crate_graph.sort_deps();
+
+let(d_crate_graph,mut d_proc_macros) = (crate_graph.clone(), proc_macros.clone());
+
+ crate_graph.extend(d_crate_graph.clone(),&mut d_proc_macros);
+assert!(crate_graph.iter().eq(d_crate_graph.iter()));
+assert_eq!(proc_macros, d_proc_macros);
+}
+
+#[test]
+fncrate_graph_dedup(){
+let path_map = &mutDefault::default();
+let(mut crate_graph, _proc_macros) =
+load_cargo_with_fake_sysroot(path_map,"ripgrep-metadata.json");
+assert_eq!(crate_graph.iter().count(),81);
+ crate_graph.sort_deps();
+let(regex_crate_graph,mut regex_proc_macros) =
+load_cargo_with_fake_sysroot(path_map,"regex-metadata.json");
+assert_eq!(regex_crate_graph.iter().count(),60);
+
+ crate_graph.extend(regex_crate_graph,&mut regex_proc_macros);
+assert_eq!(crate_graph.iter().count(),118);
+}
+
 #[test]
 fnsmoke_test_real_sysroot_cargo(){
 let file_map = &mutFxHashMap::<AbsPathBuf,FileId>::default();