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helix/helix-core/tests/indent.rs

233 lines
8.3 KiB
Rust

use helix_core::{
indent::{indent_level_for_line, treesitter_indent_for_pos, IndentStyle},
syntax::{Configuration, Loader},
Syntax,
};
use ropey::Rope;
use std::{ops::Range, path::PathBuf, process::Command};
#[test]
fn test_treesitter_indent_rust() {
standard_treesitter_test("rust.rs", "source.rust");
}
#[test]
fn test_treesitter_indent_cpp() {
standard_treesitter_test("cpp.cpp", "source.cpp");
}
#[test]
fn test_treesitter_indent_rust_helix() {
// We pin a specific git revision to prevent unrelated changes from causing the indent tests to fail.
// Ideally, someone updates this once in a while and fixes any errors that occur.
let rev = "af382768cdaf89ff547dbd8f644a1bddd90e7c8f";
let files = Command::new("git")
.args([
"ls-tree",
"-r",
"--name-only",
"--full-tree",
rev,
"helix-term/src",
])
.output()
.unwrap();
let files = String::from_utf8(files.stdout).unwrap();
let ignored_files = vec![
// Contains many macros that tree-sitter does not parse in a meaningful way and is otherwise not very interesting
"helix-term/src/health.rs",
];
for file in files.split_whitespace() {
if ignored_files.contains(&file) {
continue;
}
let ignored_lines: Vec<Range<usize>> = match file {
"helix-term/src/application.rs" => vec![
// We can't handle complicated indent rules inside macros (`json!` in this case) since
// the tree-sitter grammar only parses them as `token_tree` and `identifier` nodes.
1045..1051,
],
"helix-term/src/commands.rs" => vec![
// This is broken because of the current handling of `call_expression`
// (i.e. having an indent query for it but outdenting again in specific cases).
// The indent query is needed to correctly handle multi-line arguments in function calls
// inside indented `field_expression` nodes (which occurs fairly often).
//
// Once we have the `@indent.always` capture type, it might be possible to just have an indent
// capture for the `arguments` field of a call expression. That could enable us to correctly
// handle this.
2226..2230,
],
"helix-term/src/commands/dap.rs" => vec![
// Complex `format!` macro
46..52,
],
"helix-term/src/commands/lsp.rs" => vec![
// Macro
624..627,
// Return type declaration of a closure. `cargo fmt` adds an additional space here,
// which we cannot (yet) model with our indent queries.
878..879,
// Same as in `helix-term/src/commands.rs`
1335..1343,
],
"helix-term/src/config.rs" => vec![
// Multiline string
146..152,
],
"helix-term/src/keymap.rs" => vec![
// Complex macro (see above)
456..470,
// Multiline string without indent
563..567,
],
"helix-term/src/main.rs" => vec![
// Multiline string
44..70,
],
"helix-term/src/ui/completion.rs" => vec![
// Macro
218..232,
],
"helix-term/src/ui/editor.rs" => vec![
// The chained function calls here are not indented, probably because of the comment
// in between. Since `cargo fmt` doesn't even attempt to format it, there's probably
// no point in trying to indent this correctly.
342..350,
],
"helix-term/src/ui/lsp.rs" => vec![
// Macro
56..61,
],
"helix-term/src/ui/statusline.rs" => vec![
// Same as in `helix-term/src/commands.rs`
436..442,
450..456,
],
_ => Vec::new(),
};
let git_object = rev.to_string() + ":" + file;
let content = Command::new("git")
.args(["cat-file", "blob", &git_object])
.output()
.unwrap();
let doc = Rope::from_reader(&mut content.stdout.as_slice()).unwrap();
test_treesitter_indent(file, doc, "source.rust", ignored_lines);
}
}
#[test]
fn test_indent_level_for_line_with_spaces() {
let tab_width: usize = 4;
let indent_width: usize = 4;
let line = ropey::Rope::from_str(" Indented with 8 spaces");
let indent_level = indent_level_for_line(line.slice(0..), tab_width, indent_width);
assert_eq!(indent_level, 2)
}
#[test]
fn test_indent_level_for_line_with_tabs() {
let tab_width: usize = 4;
let indent_width: usize = 4;
let line = ropey::Rope::from_str("\t\tIndented with 2 tabs");
let indent_level = indent_level_for_line(line.slice(0..), tab_width, indent_width);
assert_eq!(indent_level, 2)
}
#[test]
fn test_indent_level_for_line_with_spaces_and_tabs() {
let tab_width: usize = 4;
let indent_width: usize = 4;
let line = ropey::Rope::from_str(" \t \tIndented with mix of spaces and tabs");
let indent_level = indent_level_for_line(line.slice(0..), tab_width, indent_width);
assert_eq!(indent_level, 2)
}
fn indent_tests_dir() -> PathBuf {
let mut test_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
test_dir.push("tests/data/indent");
test_dir
}
fn indent_test_path(name: &str) -> PathBuf {
let mut path = indent_tests_dir();
path.push(name);
path
}
fn indent_tests_config() -> Configuration {
let mut config_path = indent_tests_dir();
config_path.push("languages.toml");
let config = std::fs::read_to_string(config_path).unwrap();
toml::from_str(&config).unwrap()
}
fn standard_treesitter_test(file_name: &str, lang_scope: &str) {
let test_path = indent_test_path(file_name);
let test_file = std::fs::File::open(test_path).unwrap();
let doc = ropey::Rope::from_reader(test_file).unwrap();
test_treesitter_indent(file_name, doc, lang_scope, Vec::new())
}
/// Test that all the lines in the given file are indented as expected.
/// ignored_lines is a list of (1-indexed) line ranges that are excluded from this test.
fn test_treesitter_indent(
test_name: &str,
doc: Rope,
lang_scope: &str,
ignored_lines: Vec<std::ops::Range<usize>>,
) {
let loader = Loader::new(indent_tests_config()).unwrap();
// set runtime path so we can find the queries
let mut runtime = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
runtime.push("../runtime");
std::env::set_var("HELIX_RUNTIME", runtime.to_str().unwrap());
let language_config = loader.language_config_for_scope(lang_scope).unwrap();
let indent_style = IndentStyle::from_str(&language_config.indent.as_ref().unwrap().unit);
let highlight_config = language_config.highlight_config(&[]).unwrap();
let text = doc.slice(..);
let syntax = Syntax::new(text, highlight_config, std::sync::Arc::new(loader)).unwrap();
let indent_query = language_config.indent_query().unwrap();
for i in 0..doc.len_lines() {
let line = text.line(i);
if ignored_lines.iter().any(|range| range.contains(&(i + 1))) {
continue;
}
if let Some(pos) = helix_core::find_first_non_whitespace_char(line) {
let tab_width: usize = 4;
let suggested_indent = treesitter_indent_for_pos(
indent_query,
&syntax,
tab_width,
indent_style.indent_width(tab_width),
text,
i,
text.line_to_char(i) + pos,
false,
)
.unwrap()
.to_string(&indent_style, tab_width);
assert!(
line.get_slice(..pos).map_or(false, |s| s == suggested_indent),
"Wrong indentation for file {:?} on line {}:\n\"{}\" (original line)\n\"{}\" (suggested indentation)\n",
test_name,
i+1,
line.slice(..line.len_chars()-1),
suggested_indent,
);
}
}
}