testutils: delete bool-typed init() in favor of enum-typed version

It makes the call sites clearer if we pass the `TestRepoBackend` enum
instead of the boolean `use_git` value. It's also more extensible (I
plan to add another backend for tests).

cli/src/merge_tools/builtin.rs

@@ -543,13 +543,13 @@ pub fn edit_merge_builtin(
 mod tests {
     use jj_lib::conflicts::extract_as_single_hunk;
     use jj_lib::repo::Repo;
-    use testutils::TestRepo;
+    use testutils::{TestRepo, TestRepoBackend};
 
     use super::*;
 
     #[test]
     fn test_edit_diff_builtin() {
-        let test_repo = TestRepo::init(false);
+        let test_repo = TestRepo::init_with_backend(TestRepoBackend::Local);
         let store = test_repo.repo.store();
 
         let unused_path = RepoPath::from_internal_string("unused");
@@ -691,7 +691,7 @@ mod tests {
 
     #[test]
     fn test_make_merge_sections() {
-        let test_repo = TestRepo::init(false);
+        let test_repo = TestRepo::init_with_backend(TestRepoBackend::Local);
         let store = test_repo.repo.store();
 
         let path = RepoPath::from_internal_string("file");

lib/tests/test_bad_locking.rs

@@ -18,7 +18,7 @@ use itertools::Itertools;
 use jj_lib::repo::{Repo, StoreFactories};
 use jj_lib::workspace::Workspace;
 use test_case::test_case;
-use testutils::{create_random_commit, load_repo_at_head, TestWorkspace};
+use testutils::{create_random_commit, load_repo_at_head, TestRepoBackend, TestWorkspace};
 
 fn copy_directory(src: &Path, dst: &Path) {
     std::fs::create_dir(dst).ok();
@@ -95,13 +95,13 @@ fn merge_directories(left: &Path, base: &Path, right: &Path, output: &Path) {
     }
 }
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_bad_locking_children(use_git: bool) {
+#[test_case(TestRepoBackend::Local; "local backend")]
+#[test_case(TestRepoBackend::Git; "git backend")]
+fn test_bad_locking_children(backend: TestRepoBackend) {
     // Test that two new commits created on separate machines are both visible (not
     // lost due to lack of locking)
     let settings = testutils::user_settings();
-    let test_workspace = TestWorkspace::init(&settings, use_git);
+    let test_workspace = TestWorkspace::init_with_backend(&settings, backend);
     let repo = &test_workspace.repo;
     let workspace_root = test_workspace.workspace.workspace_root();
 
@@ -161,14 +161,14 @@ fn test_bad_locking_children(use_git: bool) {
     assert_eq!(op.parents.len(), 2);
 }
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_bad_locking_interrupted(use_git: bool) {
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_bad_locking_interrupted(backend: TestRepoBackend) {
     // Test that an interrupted update of the op-heads resulting in on op-head
     // that's a descendant of the other is resolved without creating a new
     // operation.
     let settings = testutils::user_settings();
-    let test_workspace = TestWorkspace::init(&settings, use_git);
+    let test_workspace = TestWorkspace::init_with_backend(&settings, backend);
     let repo = &test_workspace.repo;
 
     let mut tx = repo.start_transaction(&settings, "test");

lib/tests/test_commit_builder.rs

@@ -19,13 +19,13 @@ use jj_lib::repo::Repo;
 use jj_lib::repo_path::RepoPath;
 use jj_lib::settings::UserSettings;
 use test_case::test_case;
-use testutils::{assert_rebased, create_tree, CommitGraphBuilder, TestRepo};
+use testutils::{assert_rebased, create_tree, CommitGraphBuilder, TestRepo, TestRepoBackend};
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_initial(use_git: bool) {
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_initial(backend: TestRepoBackend) {
     let settings = testutils::user_settings();
-    let test_repo = TestRepo::init(use_git);
+    let test_repo = TestRepo::init_with_backend(backend);
     let repo = &test_repo.repo;
     let store = repo.store();
 
@@ -92,11 +92,11 @@ fn test_initial(use_git: bool) {
     );
 }
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_rewrite(use_git: bool) {
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_rewrite(backend: TestRepoBackend) {
     let settings = testutils::user_settings();
-    let test_repo = TestRepo::init(use_git);
+    let test_repo = TestRepo::init_with_backend(backend);
     let repo = &test_repo.repo;
     let store = repo.store().clone();
 
@@ -188,12 +188,12 @@ fn test_rewrite(use_git: bool) {
 }
 
 // An author field with an empty name/email should get filled in on rewrite
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_rewrite_update_missing_user(use_git: bool) {
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_rewrite_update_missing_user(backend: TestRepoBackend) {
     let missing_user_settings =
         UserSettings::from_config(config::Config::builder().build().unwrap());
-    let test_repo = TestRepo::init(use_git);
+    let test_repo = TestRepo::init_with_backend(backend);
     let repo = &test_repo.repo;
 
     let mut tx = repo.start_transaction(&missing_user_settings, "test");
@@ -237,11 +237,11 @@ fn test_rewrite_update_missing_user(use_git: bool) {
     );
 }
 
-#[test_case(false ; "local backend")]
-// #[test_case(true ; "git backend")]
-fn test_commit_builder_descendants(use_git: bool) {
+#[test_case(TestRepoBackend::Local ; "local backend")]
+// #[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_commit_builder_descendants(backend: TestRepoBackend) {
     let settings = testutils::user_settings();
-    let test_repo = TestRepo::init(use_git);
+    let test_repo = TestRepo::init_with_backend(backend);
     let repo = &test_repo.repo;
     let store = repo.store().clone();
 

lib/tests/test_commit_concurrent.rs

@@ -19,7 +19,7 @@ use std::thread;
 use jj_lib::dag_walk;
 use jj_lib::repo::{ReadonlyRepo, Repo};
 use test_case::test_case;
-use testutils::{load_repo_at_head, write_random_commit, TestWorkspace};
+use testutils::{load_repo_at_head, write_random_commit, TestRepoBackend, TestWorkspace};
 
 fn count_non_merge_operations(repo: &Arc<ReadonlyRepo>) -> usize {
     let op_store = repo.op_store();
@@ -38,14 +38,14 @@ fn count_non_merge_operations(repo: &Arc<ReadonlyRepo>) -> usize {
     num_ops
 }
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_commit_parallel(use_git: bool) {
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_commit_parallel(backend: TestRepoBackend) {
     // This loads a Repo instance and creates and commits many concurrent
     // transactions from it. It then reloads the repo. That should merge all the
     // operations and all commits should be visible.
     let settings = testutils::user_settings();
-    let test_workspace = TestWorkspace::init(&settings, use_git);
+    let test_workspace = TestWorkspace::init_with_backend(&settings, backend);
     let repo = &test_workspace.repo;
 
     let num_threads = max(num_cpus::get(), 4);
@@ -70,13 +70,13 @@ fn test_commit_parallel(use_git: bool) {
     assert_eq!(count_non_merge_operations(&repo), num_threads + 2);
 }
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_commit_parallel_instances(use_git: bool) {
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_commit_parallel_instances(backend: TestRepoBackend) {
     // Like the test above but creates a new repo instance for every thread, which
     // makes it behave very similar to separate processes.
     let settings = testutils::user_settings();
-    let test_workspace = TestWorkspace::init(&settings, use_git);
+    let test_workspace = TestWorkspace::init_with_backend(&settings, backend);
     let repo = &test_workspace.repo;
 
     let num_threads = max(num_cpus::get(), 4);

lib/tests/test_conflicts.rs

@@ -20,11 +20,11 @@ use jj_lib::merge::Merge;
 use jj_lib::repo::Repo;
 use jj_lib::repo_path::RepoPath;
 use jj_lib::store::Store;
-use testutils::TestRepo;
+use testutils::{TestRepo, TestRepoBackend};
 
 #[test]
 fn test_materialize_conflict_basic() {
-    let test_repo = TestRepo::init(false);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Local);
     let store = test_repo.repo.store();
 
     let path = RepoPath::from_internal_string("file");
@@ -113,7 +113,7 @@ line 5
 
 #[test]
 fn test_materialize_conflict_multi_rebase_conflicts() {
-    let test_repo = TestRepo::init(false);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Local);
     let store = test_repo.repo.store();
 
     // Create changes (a, b, c) on top of the base, and linearize them.
@@ -232,7 +232,7 @@ line 3
 
 #[test]
 fn test_materialize_parse_roundtrip() {
-    let test_repo = TestRepo::init(false);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Local);
     let store = test_repo.repo.store();
 
     let path = RepoPath::from_internal_string("file");
@@ -334,7 +334,7 @@ line 5 right
 
 #[test]
 fn test_materialize_conflict_modify_delete() {
-    let test_repo = TestRepo::init(false);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Local);
     let store = test_repo.repo.store();
 
     let path = RepoPath::from_internal_string("file");
@@ -614,7 +614,7 @@ line 5
 
 #[test]
 fn test_update_conflict_from_content() {
-    let test_repo = TestRepo::init(false);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Local);
     let store = test_repo.repo.store();
 
     let path = RepoPath::from_internal_string("dir/file");
@@ -665,7 +665,7 @@ fn test_update_conflict_from_content() {
 
 #[test]
 fn test_update_conflict_from_content_modify_delete() {
-    let test_repo = TestRepo::init(false);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Local);
     let store = test_repo.repo.store();
 
     let path = RepoPath::from_internal_string("dir/file");

lib/tests/test_default_revset_graph_iterator.rs

@@ -20,7 +20,7 @@ use jj_lib::repo::{ReadonlyRepo, Repo as _};
 use jj_lib::revset::ResolvedExpression;
 use jj_lib::revset_graph::RevsetGraphEdge;
 use test_case::test_case;
-use testutils::{CommitGraphBuilder, TestRepo};
+use testutils::{CommitGraphBuilder, TestRepo, TestRepoBackend};
 
 fn revset_for_commits<'index>(
     repo: &'index ReadonlyRepo,
@@ -53,7 +53,7 @@ fn missing(commit: &Commit) -> RevsetGraphEdge {
 #[test_case(true ; "skip transitive edges")]
 fn test_graph_iterator_linearized(skip_transitive_edges: bool) {
     let settings = testutils::user_settings();
-    let test_repo = TestRepo::init(true);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Git);
     let repo = &test_repo.repo;
 
     // Tests that a fork and a merge becomes a single edge:
@@ -89,7 +89,7 @@ fn test_graph_iterator_linearized(skip_transitive_edges: bool) {
 #[test_case(true ; "skip transitive edges")]
 fn test_graph_iterator_virtual_octopus(skip_transitive_edges: bool) {
     let settings = testutils::user_settings();
-    let test_repo = TestRepo::init(true);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Git);
     let repo = &test_repo.repo;
 
     // Tests that merges outside the set can result in more parent edges than there
@@ -140,7 +140,7 @@ fn test_graph_iterator_virtual_octopus(skip_transitive_edges: bool) {
 #[test_case(true ; "skip transitive edges")]
 fn test_graph_iterator_simple_fork(skip_transitive_edges: bool) {
     let settings = testutils::user_settings();
-    let test_repo = TestRepo::init(true);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Git);
     let repo = &test_repo.repo;
 
     // Tests that the branch with "C" gets emitted correctly:
@@ -182,7 +182,7 @@ fn test_graph_iterator_simple_fork(skip_transitive_edges: bool) {
 #[test_case(true ; "skip transitive edges")]
 fn test_graph_iterator_multiple_missing(skip_transitive_edges: bool) {
     let settings = testutils::user_settings();
-    let test_repo = TestRepo::init(true);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Git);
     let repo = &test_repo.repo;
 
     // Tests that we get missing edges to "a" and "c" and not just one missing edge
@@ -224,7 +224,7 @@ fn test_graph_iterator_multiple_missing(skip_transitive_edges: bool) {
 #[test_case(true ; "skip transitive edges")]
 fn test_graph_iterator_edge_to_ancestor(skip_transitive_edges: bool) {
     let settings = testutils::user_settings();
-    let test_repo = TestRepo::init(true);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Git);
     let repo = &test_repo.repo;
 
     // Tests that we get both an edge from F to D and to D's ancestor C if we keep
@@ -271,7 +271,7 @@ fn test_graph_iterator_edge_to_ancestor(skip_transitive_edges: bool) {
 #[test_case(true ; "skip transitive edges")]
 fn test_graph_iterator_edge_escapes_from_(skip_transitive_edges: bool) {
     let settings = testutils::user_settings();
-    let test_repo = TestRepo::init(true);
+    let test_repo = TestRepo::init_with_backend(TestRepoBackend::Git);
     let repo = &test_repo.repo;
 
     // Tests a more complex case for skipping transitive edges.

lib/tests/test_diff_summary.rs

@@ -16,12 +16,12 @@ use jj_lib::matchers::{EverythingMatcher, FilesMatcher};
 use jj_lib::merged_tree::DiffSummary;
 use jj_lib::repo_path::RepoPath;
 use test_case::test_case;
-use testutils::{create_tree, TestRepo};
+use testutils::{create_tree, TestRepo, TestRepoBackend};
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_types(use_git: bool) {
-    let test_repo = TestRepo::init(use_git);
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_types(backend: TestRepoBackend) {
+    let test_repo = TestRepo::init_with_backend(backend);
     let repo = &test_repo.repo;
 
     let clean_path = RepoPath::from_internal_string("clean");
@@ -57,10 +57,10 @@ fn test_types(use_git: bool) {
     );
 }
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_tree_file_transition(use_git: bool) {
-    let test_repo = TestRepo::init(use_git);
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_tree_file_transition(backend: TestRepoBackend) {
+    let test_repo = TestRepo::init_with_backend(backend);
     let repo = &test_repo.repo;
 
     let dir_file_path = RepoPath::from_internal_string("dir/file");
@@ -87,10 +87,10 @@ fn test_tree_file_transition(use_git: bool) {
     );
 }
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_sorting(use_git: bool) {
-    let test_repo = TestRepo::init(use_git);
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_sorting(backend: TestRepoBackend) {
+    let test_repo = TestRepo::init_with_backend(backend);
     let repo = &test_repo.repo;
 
     let a_path = RepoPath::from_internal_string("a");
@@ -152,10 +152,10 @@ fn test_sorting(use_git: bool) {
     );
 }
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_matcher_dir_file_transition(use_git: bool) {
-    let test_repo = TestRepo::init(use_git);
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_matcher_dir_file_transition(backend: TestRepoBackend) {
+    let test_repo = TestRepo::init_with_backend(backend);
     let repo = &test_repo.repo;
 
     let a_path = RepoPath::from_internal_string("a");
@@ -219,10 +219,10 @@ fn test_matcher_dir_file_transition(use_git: bool) {
     );
 }
 
-#[test_case(false ; "local backend")]
-#[test_case(true ; "git backend")]
-fn test_matcher_normal_cases(use_git: bool) {
-    let test_repo = TestRepo::init(use_git);
+#[test_case(TestRepoBackend::Local ; "local backend")]
+#[test_case(TestRepoBackend::Git ; "git backend")]
+fn test_matcher_normal_cases(backend: TestRepoBackend) {
+    let test_repo = TestRepo::init_with_backend(backend);
     let repo = &test_repo.repo;
 
     let a_path = RepoPath::from_internal_string("a");