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jj/lib/tests/test_conflicts.rs
Martin von Zweigbergk a995c66635 merge: move some methods back to conflicts as free functions 
I think I moved way too many functions onto `Merge<Option<TreeValue>>`
in 82883e648d. This effectively reverts almost all of that
commit. The `Merge<T>` type is simple container and it seems like it
should be at fairly low level in the dependency graph. By moving
functions off of it, we can get rid of the back-depdencies from the
`merge` module to the `conflict` module that I introduced when I moved
`Merge` to the `merge` module. I'm thinking the `conflict` module can
focus on materialized conflicts.
2023-08-11 21:11:25 +00:00

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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, TreeValue};
use jj_lib::conflicts::{materialize, 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 testutils::TestRepo;
fn file_value(file_id: &FileId) -> TreeValue {
TreeValue::File {
id: file_id.clone(),
executable: false,
}
}
#[test]
fn test_materialize_conflict_basic() {
let test_repo = TestRepo::init(false);
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::new(
vec![Some(file_value(&base_id))],
vec![Some(file_value(&left_id)), Some(file_value(&right_id))],
);
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::new(
vec![Some(file_value(&base_id))],
vec![Some(file_value(&right_id)), Some(file_value(&left_id))],
);
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(false);
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::new(
vec![Some(file_value(&base_id)), Some(file_value(&base_id))],
vec![
Some(file_value(&a_id)),
Some(file_value(&b_id)),
Some(file_value(&c_id)),
],
);
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::new(
vec![Some(file_value(&base_id)), Some(file_value(&base_id))],
vec![
Some(file_value(&c_id)),
Some(file_value(&b_id)),
Some(file_value(&a_id)),
],
);
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::new(
vec![Some(file_value(&base_id)), Some(file_value(&base_id))],
vec![
Some(file_value(&c_id)),
Some(file_value(&a_id)),
Some(file_value(&b_id)),
],
);
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(false);
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::new(
vec![Some(file_value(&base_id))],
vec![Some(file_value(&left_id)), Some(file_value(&right_id))],
);
let mut result: Vec<u8> = vec![];
materialize(&conflict, store, &path, &mut result).unwrap();
insta::assert_snapshot!(
String::from_utf8(result.clone()).unwrap(),
@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(&result, conflict.removes().len(), conflict.adds().len()),
@r###"
Some(
[
Merge {
removes: [
"line 1\nline 2\n",
],
adds: [
"line 1 left\nline 2 left\n",
"line 1 right\nline 2\n",
],
},
Merge {
removes: [],
adds: [
"line 3\n",
],
},
Merge {
removes: [
"line 4\nline 5\n",
],
adds: [
"line 4\nline 5 left\n",
"line 4 right\nline 5 right\n",
],
},
],
)
"###);
}
#[test]
fn test_materialize_conflict_modify_delete() {
let test_repo = TestRepo::init(false);
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::new(
vec![Some(file_value(&base_id))],
vec![
Some(file_value(&modified_id)),
Some(file_value(&deleted_id)),
],
);
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::new(
vec![Some(file_value(&base_id))],
vec![
Some(file_value(&deleted_id)),
Some(file_value(&modified_id)),
],
);
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::new(
vec![Some(file_value(&base_id))],
vec![Some(file_value(&modified_id)), 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_parse_conflict_resolved() {
assert_eq!(
parse_conflict(
b"line 1
line 2
line 3
line 4
line 5
",
1,
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
",
1,
2
),
@r###"
Some(
[
Merge {
removes: [],
adds: [
"line 1\n",
],
},
Merge {
removes: [
"line 2\nline 3\nline 4\n",
],
adds: [
"line 2\nleft\nline 4\n",
"right\n",
],
},
Merge {
removes: [],
adds: [
"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
",
2,
3
),
@r###"
Some(
[
Merge {
removes: [],
adds: [
"line 1\n",
],
},
Merge {
removes: [
"line 2\nline 3\nline 4\n",
"line 2\nline 3\nline 4\n",
],
adds: [
"line 2\nleft\nline 4\n",
"right\n",
"line 2\nforward\nline 3\nline 4\n",
],
},
Merge {
removes: [],
adds: [
"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
",
2,
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
",
1,
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
",
1,
2
),
None
)
}
#[test]
fn test_update_conflict_from_content() {
let test_repo = TestRepo::init(false);
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::new(
vec![Some(file_value(&base_file_id))],
vec![
Some(file_value(&left_file_id)),
Some(file_value(&right_file_id)),
],
);
// If the content is unchanged compared to the materialized value, we get the
// old conflict id back.
let mut materialized = vec![];
materialize(&conflict, store, &path, &mut materialized).unwrap();
let result = update_from_content(&conflict, store, &path, &materialized).unwrap();
assert_eq!(result, Some(conflict.clone()));
// If the conflict is resolved, we get None back to indicate that.
let result =
update_from_content(&conflict, store, &path, b"resolved 1\nline 2\nresolved 3\n").unwrap();
assert_eq!(result, None);
// If the conflict is partially resolved, we get a new conflict back.
let result = update_from_content(
&conflict,
store,
&path,
b"resolved 1\nline 2\n<<<<<<<\n%%%%%%%\n-line 3\n+left 3\n+++++++\nright 3\n>>>>>>>\n",
)
.unwrap();
let new_conflict = result.unwrap();
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::new(
vec![Some(file_value(&new_base_file_id))],
vec![
Some(file_value(&new_left_file_id)),
Some(file_value(&new_right_file_id))
]
)
);
}
#[test]
fn test_update_conflict_from_content_modify_delete() {
let test_repo = TestRepo::init(false);
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::new(
vec![Some(file_value(&before_file_id))],
vec![Some(file_value(&after_file_id)), None],
);
// If the content is unchanged compared to the materialized value, we get the
// old conflict id back.
let mut materialized = vec![];
materialize(&conflict, store, &path, &mut materialized).unwrap();
let result = update_from_content(&conflict, store, &path, &materialized).unwrap();
assert_eq!(result, Some(conflict.clone()));
// If the conflict is resolved, we get None back to indicate that.
let result = update_from_content(&conflict, store, &path, b"resolved\n").unwrap();
assert_eq!(result, None);
// If the conflict is modified, we get a new conflict back.
let result = update_from_content(&conflict,
store,
&path,
b"<<<<<<<\n%%%%%%%\n line 1\n-line 2 before\n+line 2 modified after\n line 3\n+++++++\n>>>>>>>\n",
)
.unwrap();
let new_conflict = result.unwrap();
// 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::new(
vec![Some(file_value(&new_base_file_id))],
vec![Some(file_value(&new_left_file_id)), None]
)
);
}
fn materialize_conflict_string(
store: &Store,
path: &RepoPath,
conflict: &Merge<Option<TreeValue>>,
) -> String {
let mut result: Vec<u8> = vec![];
materialize(conflict, store, path, &mut result).unwrap();
String::from_utf8(result).unwrap()
}
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