// Copyright 2022 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 crate::common::TestEnvironment; #[test]fn test_undo_root_operation() {    let test_env = TestEnvironment::default();    test_env.run_jj_in(".", ["git", "init", "repo"]).success();    let work_dir = test_env.work_dir("repo");     let output = work_dir.run_jj(["undo"]);    insta::assert_snapshot!(output, @r"    ------- stderr -------    Restored to operation: 000000000000 root()    [EOF]    ");     let output = work_dir.run_jj(["undo"]);    insta::assert_snapshot!(output, @r"    ------- stderr -------    Error: Cannot undo root operation    [EOF]    [exit status: 1]    ");} #[test]fn test_undo_merge_operation() {    let test_env = TestEnvironment::default();    test_env.run_jj_in(".", ["git", "init", "repo"]).success();    let work_dir = test_env.work_dir("repo");     work_dir.run_jj(["new"]).success();    work_dir.run_jj(["new", "--at-op=@-"]).success();    let output = work_dir.run_jj(["undo"]);    insta::assert_snapshot!(output, @r"    ------- stderr -------    Concurrent modification detected, resolving automatically.    Error: Cannot undo a merge operation    Hint: Consider using `jj op restore` instead    [EOF]    [exit status: 1]    ");} #[test]fn test_undo_jump_old_undo_stack() {    let test_env = TestEnvironment::default();    test_env.run_jj_in(".", ["git", "init", "repo"]).success();    let work_dir = test_env.work_dir("repo");     // create a few normal operations    for state in 'A'..='D' {        work_dir.write_file("state", state.to_string());        work_dir.run_jj(["debug", "snapshot"]).success();    }    assert_eq!(work_dir.read_file("state"), "D");     // undo operations D and C, restoring the state of B    work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "C");    work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "B");     // create operations E and F    work_dir.write_file("state", "E");    work_dir.run_jj(["debug", "snapshot"]).success();    work_dir.write_file("state", "F");    work_dir.run_jj(["debug", "snapshot"]).success();    assert_eq!(work_dir.read_file("state"), "F");     // undo operations F, E and B, restoring the state of A while skipping the    // undo-stack of C and D in the op log    work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "E");    work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "B");    work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "A");} #[test]fn test_op_revert_is_ignored() {    let test_env = TestEnvironment::default();    test_env.run_jj_in(".", ["git", "init", "repo"]).success();    let work_dir = test_env.work_dir("repo");     // create a few normal operations    work_dir.write_file("state", "A");    work_dir.run_jj(["debug", "snapshot"]).success();    work_dir.write_file("state", "B");    work_dir.run_jj(["debug", "snapshot"]).success();    assert_eq!(work_dir.read_file("state"), "B");     // `op revert` works the same way as `undo` initially, but running `undo`    // afterwards will result in a no-op. `undo` does not recognize operations    // created by `op revert` as undo-operations on which an undo-stack can    // be grown.    work_dir.run_jj(["op", "revert"]).success();    assert_eq!(work_dir.read_file("state"), "A");    work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "B");} #[test]fn test_undo_with_rev_arg_falls_back_to_revert() {    let test_env = TestEnvironment::default();    test_env.run_jj_in(".", ["git", "init", "repo"]).success();    let work_dir = test_env.work_dir("repo");     work_dir.run_jj(["new"]).success();    let output = work_dir.run_jj(["undo", "@-"]);    insta::assert_snapshot!(output, @r"    ------- stderr -------    Warning: `jj undo <operation>` is deprecated; use `jj op revert <operation>` instead    Reverted operation: 8f47435a3990 (2001-02-03 08:05:07) add workspace 'default'    Rebased 1 descendant commits    [EOF]    ");     let output = work_dir.run_jj(["op", "log", "-n1"]);    insta::assert_snapshot!(output, @r"    @  20c0ef5cef23 test-username@host.example.com 2001-02-03 04:05:09.000 +07:00 - 2001-02-03 04:05:09.000 +07:00    │  revert operation 8f47435a3990362feaf967ca6de2eb0a31c8b883dfcb66fba5c22200d12bbe61e3dc8bc855f1f6879285fcafaf85ac792f9a43bcc36e57d28737d18347d5e752    │  args: jj undo @-    [EOF]    ");} #[test]fn test_can_only_redo_undo_operation() {    let test_env = TestEnvironment::default();    test_env.run_jj_in(".", ["git", "init", "repo"]).success();    let work_dir = test_env.work_dir("repo");     insta::assert_snapshot!(work_dir.run_jj(["redo"]), @r"    ------- stderr -------    Error: Nothing to redo    [EOF]    [exit status: 1]    ");} #[test]fn test_jump_over_old_redo_stack() {    let test_env = TestEnvironment::default();    test_env.run_jj_in(".", ["git", "init", "repo"]).success();    let work_dir = test_env.work_dir("repo");     // create a few normal operations    for state in 'A'..='D' {        work_dir.write_file("state", state.to_string());        work_dir.run_jj(["debug", "snapshot"]).success();    }    assert_eq!(work_dir.read_file("state"), "D");     work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "C");    work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "B");    work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "A");     // create two adjacent redo-stacks    work_dir.run_jj(["redo"]).success();    assert_eq!(work_dir.read_file("state"), "B");    work_dir.run_jj(["redo"]).success();    assert_eq!(work_dir.read_file("state"), "C");    work_dir.run_jj(["undo"]).success();    assert_eq!(work_dir.read_file("state"), "B");    work_dir.run_jj(["redo"]).success();    assert_eq!(work_dir.read_file("state"), "C");     // jump over two adjacent redo-stacks    work_dir.run_jj(["redo"]).success();    assert_eq!(work_dir.read_file("state"), "D");     // nothing left to redo    insta::assert_snapshot!(work_dir.run_jj(["redo"]), @r"    ------- stderr -------    Error: Nothing to redo    [EOF]    [exit status: 1]    ");}