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jj/lib/tests/test_conflicts.rs
Martin von Zweigbergk 502150b2f4 conflicts: test materialization with with negative snapshots 
We didn't have any tests with negative snapshots (after a `-------`
line). I initially thought we couldn't produce such conflict markers
anymore. I'm not sure we want to render conflicts like the one in the
test like this. I don't think I intended for `add_index` in the code
to be able to be two steps ahead of the remove. Maybe we should
rewrite the algorithm to not do that and thus never produce negative
snapshots.
2024-01-23 07:18:54 -08:00

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// Copyright 2021 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.
use jj_lib::backend::FileId;
use jj_lib::conflicts::{
extract_as_single_hunk, materialize_merge_result, parse_conflict, update_from_content,
};
use jj_lib::merge::Merge;
use jj_lib::repo::Repo;
use jj_lib::repo_path::RepoPath;
use jj_lib::store::Store;
use pollster::FutureExt;
use testutils::TestRepo;
#[test]
fn test_materialize_conflict_basic() {
let test_repo = TestRepo::init();
let store = test_repo.repo.store();
let path = RepoPath::from_internal_string("file");
let base_id = testutils::write_file(
store,
path,
"line 1
line 2
line 3
line 4
line 5
",
);
let left_id = testutils::write_file(
store,
path,
"line 1
line 2
left 3.1
left 3.2
left 3.3
line 4
line 5
",
);
let right_id = testutils::write_file(
store,
path,
"line 1
line 2
right 3.1
line 4
line 5
",
);
// The left side should come first. The diff should be use the smaller (right)
// side, and the left side should be a snapshot.
let conflict = Merge::from_removes_adds(
vec![Some(base_id.clone())],
vec![Some(left_id.clone()), Some(right_id.clone())],
);
insta::assert_snapshot!(
&materialize_conflict_string(store, path, &conflict),
@r###"
line 1
line 2
<<<<<<<
+++++++
left 3.1
left 3.2
left 3.3
%%%%%%%
-line 3
+right 3.1
>>>>>>>
line 4
line 5
"###
);
// Swap the positive terms in the conflict. The diff should still use the right
// side, but now the right side should come first.
let conflict = Merge::from_removes_adds(
vec![Some(base_id.clone())],
vec![Some(right_id.clone()), Some(left_id.clone())],
);
insta::assert_snapshot!(
&materialize_conflict_string(store, path, &conflict),
@r###"
line 1
line 2
<<<<<<<
%%%%%%%
-line 3
+right 3.1
+++++++
left 3.1
left 3.2
left 3.3
>>>>>>>
line 4
line 5
"###
);
}
#[test]
fn test_materialize_conflict_multi_rebase_conflicts() {
let test_repo = TestRepo::init();
let store = test_repo.repo.store();
// Create changes (a, b, c) on top of the base, and linearize them.
let path = RepoPath::from_internal_string("file");
let base_id = testutils::write_file(
store,
path,
"line 1
line 2 base
line 3
",
);
let a_id = testutils::write_file(
store,
path,
"line 1
line 2 a.1
line 2 a.2
line 2 a.3
line 3
",
);
let b_id = testutils::write_file(
store,
path,
"line 1
line 2 b.1
line 2 b.2
line 3
",
);
let c_id = testutils::write_file(
store,
path,
"line 1
line 2 c.1
line 3
",
);
// The order of (a, b, c) should be preserved. For all cases, the "a" side
// should be a snapshot.
let conflict = Merge::from_removes_adds(
vec![Some(base_id.clone()), Some(base_id.clone())],
vec![Some(a_id.clone()), Some(b_id.clone()), Some(c_id.clone())],
);
insta::assert_snapshot!(
&materialize_conflict_string(store, path, &conflict),
@r###"
line 1
<<<<<<<
+++++++
line 2 a.1
line 2 a.2
line 2 a.3
%%%%%%%
-line 2 base
+line 2 b.1
+line 2 b.2
%%%%%%%
-line 2 base
+line 2 c.1
>>>>>>>
line 3
"###
);
let conflict = Merge::from_removes_adds(
vec![Some(base_id.clone()), Some(base_id.clone())],
vec![Some(c_id.clone()), Some(b_id.clone()), Some(a_id.clone())],
);
insta::assert_snapshot!(
&materialize_conflict_string(store, path, &conflict),
@r###"
line 1
<<<<<<<
%%%%%%%
-line 2 base
+line 2 c.1
%%%%%%%
-line 2 base
+line 2 b.1
+line 2 b.2
+++++++
line 2 a.1
line 2 a.2
line 2 a.3
>>>>>>>
line 3
"###
);
let conflict = Merge::from_removes_adds(
vec![Some(base_id.clone()), Some(base_id.clone())],
vec![Some(c_id.clone()), Some(a_id.clone()), Some(b_id.clone())],
);
insta::assert_snapshot!(
&materialize_conflict_string(store, path, &conflict),
@r###"
line 1
<<<<<<<
%%%%%%%
-line 2 base
+line 2 c.1
+++++++
line 2 a.1
line 2 a.2
line 2 a.3
%%%%%%%
-line 2 base
+line 2 b.1
+line 2 b.2
>>>>>>>
line 3
"###
);
}
#[test]
fn test_materialize_parse_roundtrip() {
let test_repo = TestRepo::init();
let store = test_repo.repo.store();
let path = RepoPath::from_internal_string("file");
let base_id = testutils::write_file(
store,
path,
"line 1
line 2
line 3
line 4
line 5
",
);
let left_id = testutils::write_file(
store,
path,
"line 1 left
line 2 left
line 3
line 4
line 5 left
",
);
let right_id = testutils::write_file(
store,
path,
"line 1 right
line 2
line 3
line 4 right
line 5 right
",
);
let conflict = Merge::from_removes_adds(
vec![Some(base_id.clone())],
vec![Some(left_id.clone()), Some(right_id.clone())],
);
let materialized = materialize_conflict_string(store, path, &conflict);
insta::assert_snapshot!(
materialized,
@r###"
<<<<<<<
+++++++
line 1 left
line 2 left
%%%%%%%
-line 1
+line 1 right
line 2
>>>>>>>
line 3
<<<<<<<
%%%%%%%
line 4
-line 5
+line 5 left
+++++++
line 4 right
line 5 right
>>>>>>>
"###
);
// The first add should always be from the left side
insta::assert_debug_snapshot!(
parse_conflict(materialized.as_bytes(), conflict.num_sides()),
@r###"
Some(
[
Conflicted(
[
"line 1 left\nline 2 left\n",
"line 1\nline 2\n",
"line 1 right\nline 2\n",
],
),
Resolved(
"line 3\n",
),
Conflicted(
[
"line 4\nline 5 left\n",
"line 4\nline 5\n",
"line 4 right\nline 5 right\n",
],
),
],
)
"###);
}
#[test]
fn test_materialize_conflict_modify_delete() {
let test_repo = TestRepo::init();
let store = test_repo.repo.store();
let path = RepoPath::from_internal_string("file");
let base_id = testutils::write_file(
store,
path,
"line 1
line 2
line 3
line 4
line 5
",
);
let modified_id = testutils::write_file(
store,
path,
"line 1
line 2
modified
line 4
line 5
",
);
let deleted_id = testutils::write_file(
store,
path,
"line 1
line 2
line 4
line 5
",
);
// left modifies a line, right deletes the same line.
let conflict = Merge::from_removes_adds(
vec![Some(base_id.clone())],
vec![Some(modified_id.clone()), Some(deleted_id.clone())],
);
insta::assert_snapshot!(&materialize_conflict_string(store, path, &conflict), @r###"
line 1
line 2
<<<<<<<
+++++++
modified
%%%%%%%
-line 3
>>>>>>>
line 4
line 5
"###
);
// right modifies a line, left deletes the same line.
let conflict = Merge::from_removes_adds(
vec![Some(base_id.clone())],
vec![Some(deleted_id.clone()), Some(modified_id.clone())],
);
insta::assert_snapshot!(&materialize_conflict_string(store, path, &conflict), @r###"
line 1
line 2
<<<<<<<
%%%%%%%
-line 3
+++++++
modified
>>>>>>>
line 4
line 5
"###
);
// modify/delete conflict at the file level
let conflict = Merge::from_removes_adds(
vec![Some(base_id.clone())],
vec![Some(modified_id.clone()), None],
);
insta::assert_snapshot!(&materialize_conflict_string(store, path, &conflict), @r###"
<<<<<<<
%%%%%%%
line 1
line 2
-line 3
+modified
line 4
line 5
+++++++
>>>>>>>
"###
);
}
#[test]
fn test_materialize_conflict_two_forward_diffs() {
let test_repo = TestRepo::init();
let store = test_repo.repo.store();
// Create conflict A-B+B-C+D-E+C. This is designed to tempt the algorithm to
// produce a negative snapshot at the end like this:
// <<<<
// ====
// A
// %%%%
// B
// ++++
// D
// %%%%
// C
// ----
// E
// >>>>
// TODO: Maybe we should never have negative snapshots
let path = RepoPath::from_internal_string("file");
let a_id = testutils::write_file(store, path, "A\n");
let b_id = testutils::write_file(store, path, "B\n");
let c_id = testutils::write_file(store, path, "C\n");
let d_id = testutils::write_file(store, path, "D\n");
let e_id = testutils::write_file(store, path, "E\n");
let conflict = Merge::from_removes_adds(
vec![Some(b_id.clone()), Some(c_id.clone()), Some(e_id.clone())],
vec![
Some(a_id.clone()),
Some(b_id.clone()),
Some(d_id.clone()),
Some(c_id.clone()),
],
);
insta::assert_snapshot!(
&materialize_conflict_string(store, path, &conflict),
@r###"
<<<<<<<
+++++++
A
%%%%%%%
B
+++++++
D
%%%%%%%
C
-------
E
>>>>>>>
"###
);
}
#[test]
fn test_parse_conflict_resolved() {
assert_eq!(
parse_conflict(
b"line 1
line 2
line 3
line 4
line 5
",
2
),
None
)
}
#[test]
fn test_parse_conflict_simple() {
insta::assert_debug_snapshot!(
parse_conflict(
b"line 1
<<<<<<<
%%%%%%%
line 2
-line 3
+left
line 4
+++++++
right
>>>>>>>
line 5
",
2
),
@r###"
Some(
[
Resolved(
"line 1\n",
),
Conflicted(
[
"line 2\nleft\nline 4\n",
"line 2\nline 3\nline 4\n",
"right\n",
],
),
Resolved(
"line 5\n",
),
],
)
"###
)
}
#[test]
fn test_parse_conflict_multi_way() {
insta::assert_debug_snapshot!(
parse_conflict(
b"line 1
<<<<<<<
%%%%%%%
line 2
-line 3
+left
line 4
+++++++
right
%%%%%%%
line 2
+forward
line 3
line 4
>>>>>>>
line 5
",
3
),
@r###"
Some(
[
Resolved(
"line 1\n",
),
Conflicted(
[
"line 2\nleft\nline 4\n",
"line 2\nline 3\nline 4\n",
"right\n",
"line 2\nline 3\nline 4\n",
"line 2\nforward\nline 3\nline 4\n",
],
),
Resolved(
"line 5\n",
),
],
)
"###
)
}
#[test]
fn test_parse_conflict_different_wrong_arity() {
assert_eq!(
parse_conflict(
b"line 1
<<<<<<<
%%%%%%%
line 2
-line 3
+left
line 4
+++++++
right
>>>>>>>
line 5
",
3
),
None
)
}
#[test]
fn test_parse_conflict_malformed_marker() {
// The conflict marker is missing `%%%%%%%`
assert_eq!(
parse_conflict(
b"line 1
<<<<<<<
line 2
-line 3
+left
line 4
+++++++
right
>>>>>>>
line 5
",
2
),
None
)
}
#[test]
fn test_parse_conflict_malformed_diff() {
// The diff part is invalid (missing space before "line 4")
assert_eq!(
parse_conflict(
b"line 1
<<<<<<<
%%%%%%%
line 2
-line 3
+left
line 4
+++++++
right
>>>>>>>
line 5
",
2
),
None
)
}
#[test]
fn test_update_conflict_from_content() {
let test_repo = TestRepo::init();
let store = test_repo.repo.store();
let path = RepoPath::from_internal_string("dir/file");
let base_file_id = testutils::write_file(store, path, "line 1\nline 2\nline 3\n");
let left_file_id = testutils::write_file(store, path, "left 1\nline 2\nleft 3\n");
let right_file_id = testutils::write_file(store, path, "right 1\nline 2\nright 3\n");
let conflict = Merge::from_removes_adds(
vec![Some(base_file_id.clone())],
vec![Some(left_file_id.clone()), Some(right_file_id.clone())],
);
// If the content is unchanged compared to the materialized value, we get the
// old conflict id back.
let materialized = materialize_conflict_string(store, path, &conflict);
let parse = |content| {
update_from_content(&conflict, store, path, content)
.block_on()
.unwrap()
};
assert_eq!(parse(materialized.as_bytes()), conflict);
// If the conflict is resolved, we get None back to indicate that.
let expected_file_id = testutils::write_file(store, path, "resolved 1\nline 2\nresolved 3\n");
assert_eq!(
parse(b"resolved 1\nline 2\nresolved 3\n"),
Merge::normal(expected_file_id)
);
// If the conflict is partially resolved, we get a new conflict back.
let new_conflict = parse(
b"resolved 1\nline 2\n<<<<<<<\n%%%%%%%\n-line 3\n+left 3\n+++++++\nright 3\n>>>>>>>\n",
);
assert_ne!(new_conflict, conflict);
// Calculate expected new FileIds
let new_base_file_id = testutils::write_file(store, path, "resolved 1\nline 2\nline 3\n");
let new_left_file_id = testutils::write_file(store, path, "resolved 1\nline 2\nleft 3\n");
let new_right_file_id = testutils::write_file(store, path, "resolved 1\nline 2\nright 3\n");
assert_eq!(
new_conflict,
Merge::from_removes_adds(
vec![Some(new_base_file_id.clone())],
vec![
Some(new_left_file_id.clone()),
Some(new_right_file_id.clone())
]
)
);
}
#[test]
fn test_update_conflict_from_content_modify_delete() {
let test_repo = TestRepo::init();
let store = test_repo.repo.store();
let path = RepoPath::from_internal_string("dir/file");
let before_file_id = testutils::write_file(store, path, "line 1\nline 2 before\nline 3\n");
let after_file_id = testutils::write_file(store, path, "line 1\nline 2 after\nline 3\n");
let conflict =
Merge::from_removes_adds(vec![Some(before_file_id)], vec![Some(after_file_id), None]);
// If the content is unchanged compared to the materialized value, we get the
// old conflict id back.
let materialized = materialize_conflict_string(store, path, &conflict);
let parse = |content| {
update_from_content(&conflict, store, path, content)
.block_on()
.unwrap()
};
assert_eq!(parse(materialized.as_bytes()), conflict);
// If the conflict is resolved, we get None back to indicate that.
let expected_file_id = testutils::write_file(store, path, "resolved\n");
assert_eq!(parse(b"resolved\n"), Merge::normal(expected_file_id));
// If the conflict is modified, we get a new conflict back.
let new_conflict = parse(
b"<<<<<<<\n%%%%%%%\n line 1\n-line 2 before\n+line 2 modified after\n line 3\n+++++++\n>>>>>>>\n",
);
// Calculate expected new FileIds
let new_base_file_id = testutils::write_file(store, path, "line 1\nline 2 before\nline 3\n");
let new_left_file_id =
testutils::write_file(store, path, "line 1\nline 2 modified after\nline 3\n");
assert_eq!(
new_conflict,
Merge::from_removes_adds(
vec![Some(new_base_file_id.clone())],
vec![Some(new_left_file_id.clone()), None]
)
);
}
fn materialize_conflict_string(
store: &Store,
path: &RepoPath,
conflict: &Merge<Option<FileId>>,
) -> String {
let mut result: Vec<u8> = vec![];
let contents = extract_as_single_hunk(conflict, store, path).block_on();
materialize_merge_result(&contents, &mut result).unwrap();
String::from_utf8(result).unwrap()
}
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