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