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Merge commit '1d8491b120223272b13451fc81265aa64f7f4d5b' into sync-from-rustfmt
[rust.git] / src / tools / rustfmt / tests / cargo-fmt / main.rs
1 // Integration tests for cargo-fmt.
2
3 use std::env;
4 use std::path::Path;
5 use std::process::Command;
6
7 use rustfmt_config_proc_macro::rustfmt_only_ci_test;
8
9 /// Run the cargo-fmt executable and return its output.
10 fn cargo_fmt(args: &[&str]) -> (String, String) {
11     let mut bin_dir = env::current_exe().unwrap();
12     bin_dir.pop(); // chop off test exe name
13     if bin_dir.ends_with("deps") {
14         bin_dir.pop();
15     }
16     let cmd = bin_dir.join(format!("cargo-fmt{}", env::consts::EXE_SUFFIX));
17
18     // Ensure cargo-fmt runs the rustfmt binary from the local target dir.
19     let path = env::var_os("PATH").unwrap_or_default();
20     let mut paths = env::split_paths(&path).collect::<Vec<_>>();
21     paths.insert(0, bin_dir);
22     let new_path = env::join_paths(paths).unwrap();
23
24     match Command::new(&cmd).args(args).env("PATH", new_path).output() {
25         Ok(output) => (
26             String::from_utf8(output.stdout).expect("utf-8"),
27             String::from_utf8(output.stderr).expect("utf-8"),
28         ),
29         Err(e) => panic!("failed to run `{:?} {:?}`: {}", cmd, args, e),
30     }
31 }
32
33 macro_rules! assert_that {
34     ($args:expr, $check:ident $check_args:tt) => {
35         let (stdout, stderr) = cargo_fmt($args);
36         if !stdout.$check$check_args {
37             panic!(
38                 "Output not expected for cargo-fmt {:?}\n\
39                  expected: {}{}\n\
40                  actual stdout:\n{}\n\
41                  actual stderr:\n{}",
42                 $args,
43                 stringify!($check),
44                 stringify!($check_args),
45                 stdout,
46                 stderr
47             );
48         }
49     };
50 }
51
52 #[rustfmt_only_ci_test]
53 #[test]
54 fn version() {
55     assert_that!(&["--version"], starts_with("rustfmt "));
56     assert_that!(&["--version"], starts_with("rustfmt "));
57     assert_that!(&["--", "-V"], starts_with("rustfmt "));
58     assert_that!(&["--", "--version"], starts_with("rustfmt "));
59 }
60
61 #[rustfmt_only_ci_test]
62 #[test]
63 fn print_config() {
64     assert_that!(
65         &["--", "--print-config", "current", "."],
66         contains("max_width = ")
67     );
68 }
69
70 #[rustfmt_only_ci_test]
71 #[test]
72 fn rustfmt_help() {
73     assert_that!(&["--", "--help"], contains("Format Rust code"));
74     assert_that!(&["--", "-h"], contains("Format Rust code"));
75     assert_that!(&["--", "--help=config"], contains("Configuration Options:"));
76 }
77
78 #[rustfmt_only_ci_test]
79 #[test]
80 fn cargo_fmt_out_of_line_test_modules() {
81     // See also https://github.com/rust-lang/rustfmt/issues/5119
82     let expected_modified_files = [
83         "tests/mod-resolver/test-submodule-issue-5119/src/lib.rs",
84         "tests/mod-resolver/test-submodule-issue-5119/tests/test1.rs",
85         "tests/mod-resolver/test-submodule-issue-5119/tests/test1/sub1.rs",
86         "tests/mod-resolver/test-submodule-issue-5119/tests/test1/sub2.rs",
87         "tests/mod-resolver/test-submodule-issue-5119/tests/test1/sub3/sub4.rs",
88     ];
89     let args = [
90         "-v",
91         "--check",
92         "--manifest-path",
93         "tests/mod-resolver/test-submodule-issue-5119/Cargo.toml",
94     ];
95     let (stdout, _) = cargo_fmt(&args);
96     for file in expected_modified_files {
97         let path = Path::new(file).canonicalize().unwrap();
98         assert!(stdout.contains(&format!("Diff in {}", path.display())))
99     }
100 }
101
102 #[rustfmt_only_ci_test]
103 #[test]
104 fn cargo_fmt_emits_error_on_line_overflow_true() {
105     // See also https://github.com/rust-lang/rustfmt/issues/3164
106     let args = [
107         "--check",
108         "--manifest-path",
109         "tests/cargo-fmt/source/issue_3164/Cargo.toml",
110         "--",
111         "--config",
112         "error_on_line_overflow=true",
113     ];
114
115     let (_stdout, stderr) = cargo_fmt(&args);
116     assert!(stderr.contains(
117         "line formatted, but exceeded maximum width (maximum: 100 (see `max_width` option)"
118     ))
119 }