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ruff/crates/ruff_cli/tests/lint.rs

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//! Tests the interaction of the `lint` configuration section
#![cfg(not(target_family = "wasm"))]
use std::fs;
use std::process::Command;
use std::str;
use anyhow::Result;
use insta_cmd::{assert_cmd_snapshot, get_cargo_bin};
use tempfile::TempDir;
const BIN_NAME: &str = "ruff";
const STDIN_BASE_OPTIONS: &[&str] = &["--no-cache", "--output-format", "text"];
#[test]
fn top_level_options() -> Result<()> {
let tempdir = TempDir::new()?;
let ruff_toml = tempdir.path().join("ruff.toml");
fs::write(
&ruff_toml,
r#"
extend-select = ["B", "Q"]
[flake8-quotes]
inline-quotes = "single"
"#,
)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.args(STDIN_BASE_OPTIONS)
.arg("--config")
.arg(&ruff_toml)
.args(["--stdin-filename", "test.py"])
.arg("-")
.pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
success: false
exit_code: 1
----- stdout -----
test.py:1:5: Q000 [*] Double quotes found but single quotes preferred
test.py:1:5: B005 Using `.strip()` with multi-character strings is misleading
test.py:1:19: Q000 [*] Double quotes found but single quotes preferred
Found 3 errors.
[*] 2 fixable with the `--fix` option.
----- stderr -----
"###);
Ok(())
}
#[test]
fn lint_options() -> Result<()> {
let tempdir = TempDir::new()?;
let ruff_toml = tempdir.path().join("ruff.toml");
fs::write(
&ruff_toml,
r#"
[lint]
extend-select = ["B", "Q"]
[lint.flake8-quotes]
inline-quotes = "single"
"#,
)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.args(STDIN_BASE_OPTIONS)
.arg("--config")
.arg(&ruff_toml)
.arg("-")
.pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
success: false
exit_code: 1
----- stdout -----
-:1:5: Q000 [*] Double quotes found but single quotes preferred
-:1:5: B005 Using `.strip()` with multi-character strings is misleading
-:1:19: Q000 [*] Double quotes found but single quotes preferred
Found 3 errors.
[*] 2 fixable with the `--fix` option.
----- stderr -----
"###);
Ok(())
}
/// Tests that configurations from the top-level and `lint` section are merged together.
#[test]
fn mixed_levels() -> Result<()> {
let tempdir = TempDir::new()?;
let ruff_toml = tempdir.path().join("ruff.toml");
fs::write(
&ruff_toml,
r#"
extend-select = ["B", "Q"]
[lint.flake8-quotes]
inline-quotes = "single"
"#,
)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.args(STDIN_BASE_OPTIONS)
.arg("--config")
.arg(&ruff_toml)
.arg("-")
.pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
success: false
exit_code: 1
----- stdout -----
-:1:5: Q000 [*] Double quotes found but single quotes preferred
-:1:5: B005 Using `.strip()` with multi-character strings is misleading
-:1:19: Q000 [*] Double quotes found but single quotes preferred
Found 3 errors.
[*] 2 fixable with the `--fix` option.
----- stderr -----
"###);
Ok(())
}
/// Tests that options in the `lint` section have higher precedence than top-level options (because they are more specific).
#[test]
fn precedence() -> Result<()> {
let tempdir = TempDir::new()?;
let ruff_toml = tempdir.path().join("ruff.toml");
fs::write(
&ruff_toml,
r#"
[lint]
extend-select = ["B", "Q"]
[flake8-quotes]
inline-quotes = "double"
[lint.flake8-quotes]
inline-quotes = "single"
"#,
)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.args(STDIN_BASE_OPTIONS)
.arg("--config")
.arg(&ruff_toml)
.arg("-")
.pass_stdin(r#"a = "abcba".strip("aba")"#), @r###"
success: false
exit_code: 1
----- stdout -----
-:1:5: Q000 [*] Double quotes found but single quotes preferred
-:1:5: B005 Using `.strip()` with multi-character strings is misleading
-:1:19: Q000 [*] Double quotes found but single quotes preferred
Found 3 errors.
[*] 2 fixable with the `--fix` option.
----- stderr -----
"###);
Ok(())
}
#[test]
fn exclude() -> Result<()> {
let tempdir = TempDir::new()?;
let ruff_toml = tempdir.path().join("ruff.toml");
fs::write(
&ruff_toml,
r#"
extend-select = ["B", "Q"]
extend-exclude = ["out"]
[lint]
exclude = ["test.py", "generated.py"]
[lint.flake8-quotes]
inline-quotes = "single"
"#,
)?;
fs::write(
tempdir.path().join("main.py"),
r#"
from test import say_hy
if __name__ == "__main__":
say_hy("dear Ruff contributor")
"#,
)?;
// Excluded file but passed to the CLI directly, should be linted
let test_path = tempdir.path().join("test.py");
fs::write(
&test_path,
r#"
def say_hy(name: str):
print(f"Hy {name}")"#,
)?;
fs::write(
tempdir.path().join("generated.py"),
r#"NUMBERS = [
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16, 17, 18, 19
]
OTHER = "OTHER"
"#,
)?;
let out_dir = tempdir.path().join("out");
fs::create_dir(&out_dir)?;
fs::write(out_dir.join("a.py"), r#"a = "a""#)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.current_dir(tempdir.path())
.arg("check")
.args(STDIN_BASE_OPTIONS)
.args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
// Explicitly pass test.py, should be linted regardless of it being excluded by lint.exclude
.arg(test_path.file_name().unwrap())
// Lint all other files in the directory, should respect the `exclude` and `lint.exclude` options
.arg("."), @r###"
success: false
exit_code: 1
----- stdout -----
main.py:4:16: Q000 [*] Double quotes found but single quotes preferred
main.py:5:12: Q000 [*] Double quotes found but single quotes preferred
test.py:3:15: Q000 [*] Double quotes found but single quotes preferred
Found 3 errors.
[*] 3 fixable with the `--fix` option.
----- stderr -----
"###);
Ok(())
}
#[test]
fn exclude_stdin() -> Result<()> {
let tempdir = TempDir::new()?;
let ruff_toml = tempdir.path().join("ruff.toml");
fs::write(
&ruff_toml,
r#"
extend-select = ["B", "Q"]
[lint]
exclude = ["generated.py"]
[lint.flake8-quotes]
inline-quotes = "single"
"#,
)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.current_dir(tempdir.path())
.arg("check")
.args(STDIN_BASE_OPTIONS)
.args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
.args(["--stdin-filename", "generated.py"])
.arg("-")
.pass_stdin(r#"
from test import say_hy
if __name__ == "__main__":
say_hy("dear Ruff contributor")
"#), @r###"
success: false
exit_code: 1
----- stdout -----
generated.py:4:16: Q000 [*] Double quotes found but single quotes preferred
generated.py:5:12: Q000 [*] Double quotes found but single quotes preferred
Found 2 errors.
[*] 2 fixable with the `--fix` option.
----- stderr -----
"###);
Ok(())
}
#[test]
fn line_too_long_width_override() -> Result<()> {
let tempdir = TempDir::new()?;
let ruff_toml = tempdir.path().join("ruff.toml");
fs::write(
&ruff_toml,
r#"
line-length = 80
select = ["E501"]
[pycodestyle]
max-line-length = 100
"#,
)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.args(STDIN_BASE_OPTIONS)
.arg("--config")
.arg(&ruff_toml)
.args(["--stdin-filename", "test.py"])
.arg("-")
.pass_stdin(r#"
# longer than 80, but less than 100
_ = "---------------------------------------------------------------------------亜亜亜亜亜亜"
# longer than 100
_ = "---------------------------------------------------------------------------亜亜亜亜亜亜亜亜亜亜亜亜亜亜"
"#), @r###"
success: false
exit_code: 1
----- stdout -----
test.py:5:91: E501 Line too long (109 > 100)
Found 1 error.
----- stderr -----
"###);
Ok(())
}
#[test]
fn per_file_ignores_stdin() -> Result<()> {
let tempdir = TempDir::new()?;
let ruff_toml = tempdir.path().join("ruff.toml");
fs::write(
&ruff_toml,
r#"
extend-select = ["B", "Q"]
[lint.flake8-quotes]
inline-quotes = "single"
"#,
)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.current_dir(tempdir.path())
.arg("check")
.args(STDIN_BASE_OPTIONS)
.args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
.args(["--stdin-filename", "generated.py"])
.args(["--per-file-ignores", "generated.py:Q"])
.arg("-")
.pass_stdin(r#"
import os
from test import say_hy
if __name__ == "__main__":
say_hy("dear Ruff contributor")
"#), @r###"
success: false
exit_code: 1
----- stdout -----
generated.py:2:8: F401 [*] `os` imported but unused
Found 1 error.
[*] 1 fixable with the `--fix` option.
----- stderr -----
"###);
Ok(())
}
#[test]
fn extend_per_file_ignores_stdin() -> Result<()> {
let tempdir = TempDir::new()?;
let ruff_toml = tempdir.path().join("ruff.toml");
fs::write(
&ruff_toml,
r#"
extend-select = ["B", "Q"]
[lint.flake8-quotes]
inline-quotes = "single"
"#,
)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.current_dir(tempdir.path())
.arg("check")
.args(STDIN_BASE_OPTIONS)
.args(["--config", &ruff_toml.file_name().unwrap().to_string_lossy()])
.args(["--stdin-filename", "generated.py"])
.args(["--extend-per-file-ignores", "generated.py:Q"])
.arg("-")
.pass_stdin(r#"
import os
from test import say_hy
if __name__ == "__main__":
say_hy("dear Ruff contributor")
"#), @r###"
success: false
exit_code: 1
----- stdout -----
generated.py:2:8: F401 [*] `os` imported but unused
Found 1 error.
[*] 1 fixable with the `--fix` option.
----- stderr -----
"###);
Ok(())
}
/// Regression test for [#8858](https://github.com/astral-sh/ruff/issues/8858)
#[test]
fn parent_configuration_override() -> Result<()> {
let tempdir = TempDir::new()?;
let root_ruff = tempdir.path().join("ruff.toml");
fs::write(
root_ruff,
r#"
[lint]
select = ["ALL"]
"#,
)?;
let sub_dir = tempdir.path().join("subdirectory");
fs::create_dir(&sub_dir)?;
let subdirectory_ruff = sub_dir.join("ruff.toml");
fs::write(
subdirectory_ruff,
r#"
[lint]
ignore = ["D203", "D212"]
"#,
)?;
assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
.current_dir(sub_dir)
.arg("check")
.args(STDIN_BASE_OPTIONS)
, @r###"
success: true
exit_code: 0
----- stdout -----
----- stderr -----
warning: No Python files found under the given path(s)
"###);
Ok(())
}
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