use assert_cmd::Command;
use assert_fs::prelude::*;
use predicates::prelude::predicate;
#[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("grrs_vaishnav")?;
cmd.arg("test").arg(file.path());
cmd.assert()
.success()
.stdout(predicate::str::contains("A test\nAnother test"));
Ok(())
}