add empty input tests

Author: matklad

crates/parser/src/tests/top_entries.rs

@@ -51,6 +51,13 @@ fn source_file() {
 
 #[test]
 fn macro_stmt() {
+ check(
+ TopEntryPoint::MacroStmts,
+ "",
+ expect![[r#"
+ MACRO_STMTS
+ "#]],
+ );
  check(
  TopEntryPoint::MacroStmts,
  "#!/usr/bin/rust",
@@ -94,6 +101,13 @@ fn macro_stmt() {
 
 #[test]
 fn macro_items() {
+ check(
+ TopEntryPoint::MacroItems,
+ "",
+ expect![[r#"
+ MACRO_ITEMS
+ "#]],
+ );
  check(
  TopEntryPoint::MacroItems,
  "#!/usr/bin/rust",
@@ -131,6 +145,14 @@ fn macro_items() {
 
 #[test]
 fn macro_pattern() {
+ check(
+ TopEntryPoint::Pattern,
+ "",
+ expect![[r#"
+ ERROR
+ error 0: expected pattern
+ "#]],
+ );
  check(
  TopEntryPoint::Pattern,
  "Some(_)",
@@ -177,6 +199,15 @@ fn macro_pattern() {
 
 #[test]
 fn type_() {
+ check(
+ TopEntryPoint::Type,
+ "",
+ expect![[r#"
+ ERROR
+ error 0: expected type
+ "#]],
+ );
+
  check(
  TopEntryPoint::Type,
  "Option<!>",
@@ -226,6 +257,14 @@ fn type_() {
 
 #[test]
 fn expr() {
+ check(
+ TopEntryPoint::Expr,
+ "",
+ expect![[r#"
+ ERROR
+ error 0: expected expression
+ "#]],
+ );
  check(
  TopEntryPoint::Expr,
  "2 + 2 == 5",