bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/parser/src/tests/entries.rs')
-rw-r--r--crates/parser/src/tests/entries.rs54
1 files changed, 54 insertions, 0 deletions
diff --git a/crates/parser/src/tests/entries.rs b/crates/parser/src/tests/entries.rs
new file mode 100644
index 0000000000..947922d8b3
--- /dev/null
+++ b/crates/parser/src/tests/entries.rs
@@ -0,0 +1,54 @@
+use crate::{LexedStr, PrefixEntryPoint, Step};
+
+#[test]
+fn vis() {
+ check_prefix(PrefixEntryPoint::Vis, "pub(crate) fn foo() {}", "pub(crate)");
+ check_prefix(PrefixEntryPoint::Vis, "fn foo() {}", "");
+ check_prefix(PrefixEntryPoint::Vis, "pub(fn foo() {}", "pub");
+ check_prefix(PrefixEntryPoint::Vis, "pub(crate fn foo() {}", "pub(crate");
+ check_prefix(PrefixEntryPoint::Vis, "crate fn foo() {}", "crate");
+}
+
+#[test]
+fn block() {
+ check_prefix(PrefixEntryPoint::Block, "{}, 92", "{}");
+ check_prefix(PrefixEntryPoint::Block, "{, 92)", "{, 92)");
+ check_prefix(PrefixEntryPoint::Block, "()", "");
+}
+
+#[test]
+fn stmt() {
+ check_prefix(PrefixEntryPoint::Stmt, "92; fn", "92");
+ check_prefix(PrefixEntryPoint::Stmt, "let _ = 92; 1", "let _ = 92");
+ check_prefix(PrefixEntryPoint::Stmt, "pub fn f() {} = 92", "pub fn f() {}");
+ check_prefix(PrefixEntryPoint::Stmt, ";;;", ";");
+ check_prefix(PrefixEntryPoint::Stmt, "+", "+");
+ check_prefix(PrefixEntryPoint::Stmt, "@", "@");
+ check_prefix(PrefixEntryPoint::Stmt, "loop {} - 1", "loop {}");
+}
+
+fn check_prefix(entry: PrefixEntryPoint, input: &str, prefix: &str) {
+ let lexed = LexedStr::new(input);
+ let input = lexed.to_input();
+
+ let mut n_tokens = 0;
+ for step in entry.parse(&input).iter() {
+ match step {
+ Step::Token { n_input_tokens, .. } => n_tokens += n_input_tokens as usize,
+ Step::Enter { .. } | Step::Exit | Step::Error { .. } => (),
+ }
+ }
+
+ let mut i = 0;
+ loop {
+ if n_tokens == 0 {
+ break;
+ }
+ if !lexed.kind(i).is_trivia() {
+ n_tokens -= 1;
+ }
+ i += 1;
+ }
+ let buf = &lexed.as_str()[..lexed.text_start(i)];
+ assert_eq!(buf, prefix);
+}