// Copyright 2025 The Jujutsu Authors//// Licensed under the Apache License, Version 2.0 (the "License");// you may not use this file except in compliance with the License.// You may obtain a copy of the License at//// https://www.apache.org/licenses/LICENSE-2.0//// Unless required by applicable law or agreed to in writing, software// distributed under the License is distributed on an "AS IS" BASIS,// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.// See the License for the specific language governing permissions and// limitations under the License. //! Test that optimized revset evaluates to the same result as the original//! expression. use std::rc::Rc; use itertools::Itertools as _;use jj_lib::backend::CommitId;use jj_lib::commit::Commit;use jj_lib::config::ConfigLayer;use jj_lib::config::ConfigSource;use jj_lib::repo::MutableRepo;use jj_lib::repo::Repo;use jj_lib::revset::ResolvedRevsetExpression;use jj_lib::revset::RevsetExpression;use jj_lib::revset::RevsetFilterPredicate;use jj_lib::rewrite::RebaseOptions;use jj_lib::rewrite::RebasedCommit;use jj_lib::settings::UserSettings;use proptest::prelude::*;use testutils::TestRepo; fn stable_settings() -> UserSettings {    let mut config = testutils::base_user_config();    let mut layer = ConfigLayer::empty(ConfigSource::User);    layer        .set_value("debug.commit-timestamp", "2001-02-03T04:05:06+07:00")        .unwrap();    config.add_layer(layer);    UserSettings::from_config(config).unwrap()} fn write_new_commit<'a>(    repo: &mut MutableRepo,    desc: &str,    parents: impl IntoIterator<Item = &'a Commit>,) -> Commit {    let parents = parents.into_iter().map(|c| c.id().clone()).collect();    let tree_id = repo.store().empty_merged_tree_id();    repo.new_commit(parents, tree_id)        .set_description(desc)        .write()        .unwrap()} fn rebase_descendants(repo: &mut MutableRepo) -> Vec<Commit> {    let mut commits = Vec::new();    repo.rebase_descendants_with_options(&RebaseOptions::default(), |_, rebased| match rebased {        RebasedCommit::Rewritten(commit) => commits.push(commit),        RebasedCommit::Abandoned { .. } => {}    })    .unwrap();    commits} /// Strategy to generate arbitrary revset expressions.fn arb_expression(    known_commits: Vec<CommitId>,    visible_heads: Vec<Vec<CommitId>>,) -> impl Strategy<Value = Rc<ResolvedRevsetExpression>> {    // https://proptest-rs.github.io/proptest/proptest/tutorial/recursive.html    let max_commits = known_commits.len();    let leaf_expr = prop_oneof![        Just(RevsetExpression::none()),        Just(RevsetExpression::all()),        Just(RevsetExpression::visible_heads()),        Just(RevsetExpression::root()),        proptest::sample::subsequence(known_commits, 1..=5.min(max_commits))            .prop_map(RevsetExpression::commits),        // Use merges() as a filter that isn't constant. Since we don't have an        // optimization rule that rewrites filter predicates, we wouldn't have        // to add various filter predicates.        Just(RevsetExpression::filter(            RevsetFilterPredicate::ParentCount(2..u32::MAX)        )),    ];    leaf_expr.prop_recursive(        10,  // depth        100, // total nodes        2,   // unary or binary        move |expr| {            // This table includes redundant expressions (e.g. parents() and            // ancestors()) if they are common, which will probably make them be            // more weighted?            prop_oneof![                // Ancestors                expr.clone().prop_map(|x| x.parents()),                expr.clone().prop_map(|x| x.ancestors()),                (expr.clone(), 0..5_u64).prop_map(|(x, d)| x.ancestors_range(0..d)),                // Descendants                expr.clone().prop_map(|x| x.children()),                expr.clone().prop_map(|x| x.descendants()),                (expr.clone(), 0..5_u64).prop_map(|(x, d)| x.descendants_range(0..d)),                // Range                (expr.clone(), expr.clone()).prop_map(|(x, y)| x.range(&y)),                // DagRange                (expr.clone(), expr.clone()).prop_map(|(x, y)| x.dag_range_to(&y)),                expr.clone().prop_map(|x| x.connected()),                // Reachable                (expr.clone(), expr.clone()).prop_map(|(x, y)| x.reachable(&y)),                // Heads                expr.clone().prop_map(|x| x.heads()),                // Roots                expr.clone().prop_map(|x| x.roots()),                // ForkPoint                expr.clone().prop_map(|x| x.fork_point()),                // Latest                (expr.clone(), 0..5_usize).prop_map(|(x, n)| x.latest(n)),                // AtOperation (or WithinVisibility)                (                    expr.clone(),                    proptest::sample::select(visible_heads.clone())                )                    .prop_map(|(candidates, visible_heads)| Rc::new(                        RevsetExpression::WithinVisibility {                            candidates,                            visible_heads                        }                    )),                // Coalesce (in binary form)                [expr.clone(), expr.clone()].prop_map(|xs| RevsetExpression::coalesce(&xs)),                // General set operations                expr.clone().prop_map(|x| x.negated()),                (expr.clone(), expr.clone()).prop_map(|(x, y)| x.union(&y)),                (expr.clone(), expr.clone()).prop_map(|(x, y)| x.intersection(&y)),                (expr.clone(), expr.clone()).prop_map(|(x, y)| x.minus(&y)),            ]        },    )} fn verify_optimized(    repo: &dyn Repo,    expression: &Rc<ResolvedRevsetExpression>,) -> Result<(), TestCaseError> {    let optimized_revset = expression.clone().evaluate(repo).unwrap();    let unoptimized_revset = expression.clone().evaluate_unoptimized(repo).unwrap();    let optimized_ids: Vec<_> = optimized_revset.iter().try_collect().unwrap();    let unoptimized_ids: Vec<_> = unoptimized_revset.iter().try_collect().unwrap();    prop_assert_eq!(optimized_ids, unoptimized_ids);    Ok(())} #[test]fn test_mostly_linear() {    let settings = stable_settings();    let test_repo = TestRepo::init_with_settings(&settings);    let repo = test_repo.repo;     // 8 9    // 6 7    // |/|    // 4 5    // 3 |    // 1 2    // |/    // 0    let mut tx = repo.start_transaction();    let commit0 = repo.store().root_commit();    let commit1 = write_new_commit(tx.repo_mut(), "1", [&commit0]);    let commit2 = write_new_commit(tx.repo_mut(), "2", [&commit0]);    let commit3 = write_new_commit(tx.repo_mut(), "3", [&commit1]);    let commit4 = write_new_commit(tx.repo_mut(), "4", [&commit3]);    let commit5 = write_new_commit(tx.repo_mut(), "5", [&commit2]);    let commit6 = write_new_commit(tx.repo_mut(), "6", [&commit4]);    let commit7 = write_new_commit(tx.repo_mut(), "7", [&commit4, &commit5]);    let commit8 = write_new_commit(tx.repo_mut(), "8", [&commit6]);    let commit9 = write_new_commit(tx.repo_mut(), "9", [&commit7]);    let commits = vec![        commit0, commit1, commit2, commit3, commit4, commit5, commit6, commit7, commit8, commit9,    ];    let repo = tx.commit("a").unwrap();     // Commit ids for reference    insta::assert_snapshot!(        commits.iter().map(|c| format!("{:<2} {}\n", c.description(), c.id())).join(""), @r"       00000000000000000000    1  b454727d1ac1243807d5    2  efbe8bc183cdad501010    3  668852e79ac986cbb24a    4  e2cfc9485a41e3039864    5  9f4cab37e672b9a20029    6  7433850ea79a09758b78    7  11f067071cc8223b818b    8  480c23000c48225eec16    9  773cad10cdad4b30c9bf    ");     let commit_ids = commits.iter().map(|c| c.id().clone()).collect_vec();    let visible_heads = vec![        vec![commit_ids[0].clone()],        vec![commit_ids[8].clone(), commit_ids[9].clone()],    ];     proptest!(|(expression in arb_expression(commit_ids, visible_heads))| {        verify_optimized(repo.as_ref(), &expression)?;    });} #[test]fn test_weird_merges() {    let settings = stable_settings();    let test_repo = TestRepo::init_with_settings(&settings);    let repo = test_repo.repo;     //     8    //    /|\    // 4 5 6 7    // |X| |/    // 1 2 3    //  \|/    //   0    let mut tx = repo.start_transaction();    let commit0 = repo.store().root_commit();    let commit1 = write_new_commit(tx.repo_mut(), "1", [&commit0]);    let commit2 = write_new_commit(tx.repo_mut(), "2", [&commit0]);    let commit3 = write_new_commit(tx.repo_mut(), "3", [&commit0]);    let commit4 = write_new_commit(tx.repo_mut(), "4", [&commit1, &commit2]);    let commit5 = write_new_commit(tx.repo_mut(), "5", [&commit1, &commit2]);    let commit6 = write_new_commit(tx.repo_mut(), "6", [&commit3]);    let commit7 = write_new_commit(tx.repo_mut(), "7", [&commit3]);    let commit8 = write_new_commit(tx.repo_mut(), "8", [&commit5, &commit6, &commit7]);    let commits = vec![        commit0, commit1, commit2, commit3, commit4, commit5, commit6, commit7, commit8,    ];    let repo = tx.commit("a").unwrap();     // Commit ids for reference    insta::assert_snapshot!(        commits.iter().map(|c| format!("{:<2} {}\n", c.description(), c.id())).join(""), @r"       00000000000000000000    1  b454727d1ac1243807d5    2  efbe8bc183cdad501010    3  8e6b4a4aa763e550916a    4  ff56a4d7893e7c13b323    5  f1fbd424801c4550decb    6  8d3dad20495f63c76f5e    7  116c29c5f0f7d1eef9cb    8  50774213daae44ce0e66    ");     let commit_ids = commits.iter().map(|c| c.id().clone()).collect_vec();    let visible_heads = vec![        vec![commit_ids[0].clone()],        vec![commit_ids[4].clone(), commit_ids[8].clone()],    ];     proptest!(|(expression in arb_expression(commit_ids, visible_heads))| {        verify_optimized(repo.as_ref(), &expression)?;    });} #[test]fn test_rewritten() {    let settings = stable_settings();    let test_repo = TestRepo::init_with_settings(&settings);    let repo = test_repo.repo;     // 5    // |\    // 4 | 3    // | |/    // 1 2    // |/    // 0    let mut tx = repo.start_transaction();    let commit0 = repo.store().root_commit();    let commit1 = write_new_commit(tx.repo_mut(), "1", [&commit0]);    let commit2 = write_new_commit(tx.repo_mut(), "2", [&commit0]);    let commit3 = write_new_commit(tx.repo_mut(), "3", [&commit2]);    let commit4 = write_new_commit(tx.repo_mut(), "4", [&commit1]);    let commit5 = write_new_commit(tx.repo_mut(), "5", [&commit4, &commit2]);    let mut commits = vec![commit0, commit1, commit2, commit3, commit4, commit5];    let repo = tx.commit("a").unwrap();     // Rewrite 2, rebase 3 and 5    let mut tx = repo.start_transaction();    let commit2b = tx        .repo_mut()        .rewrite_commit(&commits[2])        .set_description("2b")        .write()        .unwrap();    commits.push(commit2b);    commits.extend(rebase_descendants(tx.repo_mut()));    let repo = tx.commit("b").unwrap();     // Abandon 4, rebase 5    let mut tx = repo.start_transaction();    tx.repo_mut().record_abandoned_commit(&commits[4]);    commits.extend(rebase_descendants(tx.repo_mut()));    let repo = tx.commit("c").unwrap();     // Commit ids for reference    insta::assert_snapshot!(        commits.iter().map(|c| format!("{:<2} {}\n", c.description(), c.id())).join(""), @r"       00000000000000000000    1  b454727d1ac1243807d5    2  efbe8bc183cdad501010    3  bf42a9771bc9322180c3    4  fb270b6eeef978c0a12b    5  479dec6a96f336043233    2b d0d01d78d2d69c0afa23    3  1894713af307b49e5644    5  9c5d36510c963d5a5ca3    5  e8b2f867cecdf8cce16d    ");     let commit_ids = commits.iter().map(|c| c.id().clone()).collect_vec();    let visible_heads = vec![        vec![commit_ids[0].clone()],        vec![commit_ids[3].clone(), commit_ids[5].clone()],        vec![commit_ids[7].clone(), commit_ids[8].clone()],        vec![commit_ids[7].clone(), commit_ids[9].clone()],    ];     proptest!(|(expression in arb_expression(commit_ids, visible_heads))| {        verify_optimized(repo.as_ref(), &expression)?;    });}