85 lines
2.9 KiB
Rust
85 lines
2.9 KiB
Rust
extern crate lalrpop;
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use std::env;
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use std::fs::{self, File};
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use std::io::Write;
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use std::path::{Path, PathBuf};
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fn main() {
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lalrpop::process_root().unwrap();
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if let Err(e) = generate_example_tests() {
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eprintln!("Failure building example tests: {}", e);
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std::process::exit(3);
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}
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}
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fn generate_example_tests() -> std::io::Result<()> {
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let out_dir = env::var_os("OUT_DIR").expect("OUT_DIR");
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let dest_path = Path::new(&out_dir).join("examples.rs");
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let mut output = File::create(dest_path)?;
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generate_tests(&mut output, PathBuf::from("examples"))?;
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println!("cargo:rerun-if-changed=build.rs");
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println!("cargo:rerun-if-changed=example.rs");
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Ok(())
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}
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fn generate_tests(f: &mut File, path_so_far: PathBuf) -> std::io::Result<()> {
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for entry in fs::read_dir(path_so_far)? {
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let entry = entry?;
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let file_name = entry
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.file_name()
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.into_string()
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.expect("reasonable file name");
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let name = file_name.trim_end_matches(".ngr");
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if entry.file_type()?.is_dir() {
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writeln!(f, "mod {} {{", name)?;
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writeln!(f, " use super::*;")?;
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generate_tests(f, entry.path())?;
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writeln!(f, "}}")?;
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} else {
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writeln!(f, "#[test]")?;
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writeln!(f, "fn {}() {{", name)?;
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writeln!(f, " let mut file_database = SimpleFiles::new();")?;
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writeln!(
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f,
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" let syntax = Syntax::parse_file(&mut file_database, {:?});",
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entry.path().display()
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)?;
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if entry.path().to_string_lossy().contains("broken") {
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writeln!(f, " if syntax.is_err() {{")?;
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writeln!(f, " return;")?;
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writeln!(f, " }}")?;
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writeln!(f, " let (errors, _) = syntax.unwrap().validate();")?;
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writeln!(
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f,
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" assert_ne!(errors.len(), 0, \"should have seen an error\");"
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)?;
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} else {
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writeln!(
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f,
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" let syntax = syntax.expect(\"file should have parsed\");"
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)?;
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writeln!(f, " let (errors, _) = syntax.validate();")?;
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writeln!(
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f,
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" assert_eq!(errors.len(), 0, \"file should have no validation errors\");"
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)?;
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writeln!(f, " let syntax_result = syntax.eval();")?;
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writeln!(f, " let ir = IR::from(syntax);")?;
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writeln!(
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f,
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" assert_eq!(syntax_result, ir.eval(), \"syntax equivalent to IR\");"
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)?;
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writeln!(f, " let compiled_result = Backend::<JITModule>::eval(ir);")?;
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writeln!(f, " assert_eq!(syntax_result, compiled_result);")?;
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}
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writeln!(f, "}}")?;
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}
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}
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Ok(())
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}
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