bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/parser/src/tests.rs')
-rw-r--r--crates/parser/src/tests.rs68
1 files changed, 68 insertions, 0 deletions
diff --git a/crates/parser/src/tests.rs b/crates/parser/src/tests.rs
new file mode 100644
index 0000000000..f323eba5e4
--- /dev/null
+++ b/crates/parser/src/tests.rs
@@ -0,0 +1,68 @@
+use std::{
+ fmt::Write,
+ fs,
+ path::{Path, PathBuf},
+};
+
+use expect_test::expect_file;
+
+use crate::LexerToken;
+
+#[test]
+fn valid_lexes_input() {
+ for case in TestCase::list("lexer/ok") {
+ let actual = lex(&case.text);
+ expect_file![case.txt].assert_eq(&actual)
+ }
+}
+
+#[test]
+fn invalid_lexes_input() {
+ for case in TestCase::list("lexer/err") {
+ let actual = lex(&case.text);
+ expect_file![case.txt].assert_eq(&actual)
+ }
+}
+
+fn lex(text: &str) -> String {
+ let mut res = String::new();
+ let mut offset = 0;
+ for token in LexerToken::tokenize(text) {
+ let token_text = &text[offset..][..token.len];
+ offset += token.len;
+ let err = token.error.map(|err| format!(" error: {}", err)).unwrap_or_default();
+ writeln!(res, "{:?} {:?}{}", token.kind, token_text, err).unwrap();
+ }
+ res
+}
+
+#[derive(PartialEq, Eq, PartialOrd, Ord)]
+struct TestCase {
+ rs: PathBuf,
+ txt: PathBuf,
+ text: String,
+}
+
+impl TestCase {
+ fn list(path: &'static str) -> Vec<TestCase> {
+ let crate_root_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
+ let test_data_dir = crate_root_dir.join("test_data");
+ let dir = test_data_dir.join(path);
+
+ let mut res = Vec::new();
+ let read_dir = fs::read_dir(&dir)
+ .unwrap_or_else(|err| panic!("can't `read_dir` {}: {}", dir.display(), err));
+ for file in read_dir {
+ let file = file.unwrap();
+ let path = file.path();
+ if path.extension().unwrap_or_default() == "rs" {
+ let rs = path;
+ let txt = rs.with_extension("txt");
+ let text = fs::read_to_string(&rs).unwrap();
+ res.push(TestCase { rs, txt, text });
+ }
+ }
+ res.sort();
+ res
+ }
+}