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use git2::Repository;
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/// Traverse the directory tree to find the repository root. Return

            

        

            

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/// Ok(Repository) if found, or Error if not found.

            

        

            

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pub fn open() -> Result<Repository, git2::Error> {

            

        

            

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    let path = std::env::current_dir().expect("Failed to get current directory.");

            

        

            

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    Repository::discover(path)

            

        

            

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}

            

        

            

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#[cfg(test)]

            

        

            

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mod tests {

            

        

            

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    use super::*;

            

        

            

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    use std::{env, fs};

            

        

            

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    use crate::test_utilities;

            

        

            

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    #[test]

            

        

            

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    fn test_open_current() {

            

        

            

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        // GIVEN a repository

            

        

            

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        let (_testdir, repo) = test_utilities::create_mock_repo();

            

        

            

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        let original_dir = env::current_dir().unwrap();

            

        

            

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        env::set_current_dir(repo.path()).unwrap();

            

        

            

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        // WHEN the repository is opened

            

        

            

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        let actual = open().unwrap();

            

        

            

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        env::set_current_dir(original_dir).unwrap();

            

        

            

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        // THEN it should match the expected repository

            

        

            

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        assert_eq!(actual.path(), repo.path());

            

        

            

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    }

            

        

            

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    #[test]

            

        

            

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    fn test_open_parent() {

            

        

            

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        // GIVEN a repository with a subdirectory

            

        

            

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        let (_testdir, repo) = test_utilities::create_mock_repo();

            

        

            

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        let subdir = repo.path().join("subdir");

            

        

            

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        fs::create_dir(&subdir).unwrap();

            

        

            

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        let original_dir = env::current_dir().unwrap();

            

        

            

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        env::set_current_dir(&subdir).unwrap();

            

        

            

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        // WHEN the repository is opened

            

        

            

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        let actual = open().unwrap();

            

        

            

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        env::set_current_dir(original_dir).unwrap();

            

        

            

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        // THEN it should match the expected repository

            

        

            

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        assert_eq!(actual.path(), repo.path());

            

        

            

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    }

            

        

            

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    #[test]

            

        

            

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    fn test_open_not_found() {

            

        

            

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        // GIVEN a directory that is not a repository

            

        

            

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        let testdir = tempfile::tempdir().unwrap();

            

        

            

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        let original_dir = env::current_dir().unwrap();

            

        

            

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        env::set_current_dir(testdir.path()).unwrap();

            

        

            

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        // WHEN the repository is opened

            

        

            

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        let actual = open();

            

        

            

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        env::set_current_dir(original_dir).unwrap();

            

        

            

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        // THEN it should not be found

            

        

            

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        assert!(actual.is_err());

            

        

            

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    }

            

        

            

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}