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Merged
merged 3 commits into from
Apr 2, 2024
Merged

Unit and integration tests for reading data from standard input #45

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a213272
Add tests for when '-' is used to signify to use standard input
oSoMoN Apr 2, 2024
b8fada8
Add unit tests for missing arguments
oSoMoN Apr 2, 2024
6a152cd
Add an integration test for reading data from stdin
oSoMoN Apr 2, 2024
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34 changes: 34 additions & 0 deletions src/params.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -457,6 +457,40 @@ mod tests {
);
}
#[test]
fn default_to_stdin() {
assert_eq!(
Ok(Params {
from: os("foo"),
to: os("/dev/stdin"),
..Default::default()
}),
parse_params([os("diff"), os("foo"), os("-")].iter().cloned())
);
assert_eq!(
Ok(Params {
from: os("/dev/stdin"),
to: os("bar"),
..Default::default()
}),
parse_params([os("diff"), os("-"), os("bar")].iter().cloned())
);
assert_eq!(
Ok(Params {
from: os("/dev/stdin"),
to: os("/dev/stdin"),
..Default::default()
}),
parse_params([os("diff"), os("-"), os("-")].iter().cloned())
);
assert!(parse_params([os("diff"), os("foo"), os("bar"), os("-")].iter().cloned()).is_err());
assert!(parse_params([os("diff"), os("-"), os("-"), os("-")].iter().cloned()).is_err());
}
#[test]
fn missing_arguments() {
assert!(parse_params([os("diff")].iter().cloned()).is_err());
assert!(parse_params([os("diff"), os("foo")].iter().cloned()).is_err());
}
#[test]
fn unknown_argument() {
assert!(
parse_params([os("diff"), os("-g"), os("foo"), os("bar")].iter().cloned()).is_err()
Expand Down
46 changes: 44 additions & 2 deletions tests/integration.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,10 +3,9 @@
// For the full copyright and license information, please view the LICENSE-*
// files that was distributed with this source code.

use assert_cmd::prelude::*;
use assert_cmd::cmd::Command;
use predicates::prelude::*;
use std::io::Write;
use std::process::Command;
use tempfile::NamedTempFile;

// Integration tests for the diffutils command
Expand Down Expand Up @@ -161,3 +160,46 @@ fn missing_newline() -> Result<(), Box<dyn std::error::Error>> {
.stderr(predicate::str::starts_with("No newline at end of file"));
Ok(())
}

#[test]
fn read_from_stdin() -> Result<(), Box<dyn std::error::Error>> {
let mut file1 = NamedTempFile::new()?;
file1.write_all("foo\n".as_bytes())?;
let mut file2 = NamedTempFile::new()?;
file2.write_all("bar\n".as_bytes())?;

let mut cmd = Command::cargo_bin("diffutils")?;
cmd.arg("-u")
.arg(file1.path())
.arg("-")
.write_stdin("bar\n");
cmd.assert()
.code(predicate::eq(1))
.failure()
.stdout(predicate::eq(format!(
"--- {}\t\n+++ /dev/stdin\t\n@@ -1 +1 @@\n-foo\n+bar\n",
file1.path().to_string_lossy()
)));

let mut cmd = Command::cargo_bin("diffutils")?;
cmd.arg("-u")
.arg("-")
.arg(file2.path())
.write_stdin("foo\n");
cmd.assert()
.code(predicate::eq(1))
.failure()
.stdout(predicate::eq(format!(
"--- /dev/stdin\t\n+++ {}\t\n@@ -1 +1 @@\n-foo\n+bar\n",
file2.path().to_string_lossy()
)));

let mut cmd = Command::cargo_bin("diffutils")?;
cmd.arg("-u").arg("-").arg("-").write_stdin("foo\n");
cmd.assert()
.code(predicate::eq(0))
.success()
.stdout(predicate::str::is_empty());

Ok(())
}
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