use assert_cmd::prelude::*; // Add methods on commands
use predicates::prelude::*; // Used for writing assertions
use std::process::Command; // Run programs
use assert_fs::prelude::*;

#[test]
fn file_doesnt_exist() -> Result<(), Box<dyn std::error::Error>> {
    let mut cmd = Command::cargo_bin("string_finder")?;

    cmd.arg("foobar").arg("test/file/doesnt/exist");
    cmd.assert()
        .failure()
        .stderr(predicate::str::contains("could not read file"));

    Ok(())
}


#[test]
fn find_content_in_file() -> Result<(), Box<dyn std::error::Error>> {
    let file = assert_fs::NamedTempFile::new("sample.txt")?;
    file.write_str("A test\nActual content\nMore content\nAnother test")?;

    let mut cmd = Command::cargo_bin("string_finder")?;
    cmd.arg("test").arg(file.path());
    cmd.assert()
        .success()
        .stdout(predicate::str::contains("test\nAnother test"));

    Ok(())
}


// #[test]
// fn find_empty_pattern() -> Result<(), Box<dyn std::error::Error>> {
//     let file = assert_fs::NamedTempFile::new("sample.txt")?;
//     file.write_str("A test\nActual content\nMore content\nAnother test")?;

//     let mut cmd = Command::cargo_bin("string_finder")?;
//     cmd.arg(" ").arg(file.path());
//     cmd.assert()
//     .failure()
//     .stderr(predicate::str::contains("Please provide a pattern"));

//     Ok(())
// }