dictator-rust 0.25.1

Rust language decree for Dictator structural linter
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83

use crate::lint_source;

#[test]
fn detects_file_too_long() {
    use std::fmt::Write;
    let mut src = String::new();
    for i in 0..410 {
        let _ = writeln!(src, "let x{i} = {i};");
    }
    let diags = lint_source(&src);
    assert!(
        diags.iter().any(|d| d.rule == "rust/file-too-long"),
        "Should detect file with >400 code lines"
    );
}

#[test]
fn ignores_comments_in_line_count() {
    use std::fmt::Write;
    // 390 code lines + 60 comment lines = 450 total, but only 390 counted
    let mut src = String::new();
    for i in 0..390 {
        let _ = writeln!(src, "let x{i} = {i};");
    }
    for i in 0..60 {
        let _ = writeln!(src, "// Comment {i}");
    }
    let diags = lint_source(&src);
    assert!(
        !diags.iter().any(|d| d.rule == "rust/file-too-long"),
        "Should not count comment-only lines"
    );
}

#[test]
fn ignores_blank_lines_in_count() {
    use std::fmt::Write;
    // 390 code lines + 60 blank lines = 450 total, but only 390 counted
    let mut src = String::new();
    for i in 0..390 {
        let _ = writeln!(src, "let x{i} = {i};");
    }
    for _ in 0..60 {
        src.push('\n');
    }
    let diags = lint_source(&src);
    assert!(
        !diags.iter().any(|d| d.rule == "rust/file-too-long"),
        "Should not count blank lines"
    );
}

#[test]
fn handles_empty_file() {
    let src = "";
    let diags = lint_source(src);
    assert!(diags.is_empty(), "Empty file should have no violations");
}

#[test]
fn handles_file_with_only_comments() {
    let src = "// Comment 1\n// Comment 2\n/* Block comment */\n";
    let diags = lint_source(src);
    assert!(
        !diags.iter().any(|d| d.rule == "rust/file-too-long"),
        "File with only comments should not trigger line count"
    );
}

#[test]
fn max_lines_zero_disables_file_too_long() {
    use std::fmt::Write;
    let mut src = String::new();
    for i in 0..1000 {
        let _ = writeln!(src, "let x{i} = {i};");
    }
    let config = crate::RustConfig {
        max_lines: 0,
        ..Default::default()
    };
    let diags = crate::lint_source_with_config(&src, &config);
    assert!(!diags.iter().any(|d| d.rule == "rust/file-too-long"));
}