1 files changed, 15 insertions, 1 deletions

diff --git a/crates/test_utils/src/lib.rs b/crates/test_utils/src/lib.rs
index 69deddcb5..db03df1c4 100644
--- a/crates/test_utils/src/lib.rs
+++ b/crates/test_utils/src/lib.rs
@@ -202,6 +202,19 @@ pub fn parse_fixture(fixture: &str) -> Vec<FixtureEntry> {
     res
 }
 
+/// Same as `parse_fixture`, except it allow empty fixture
+pub fn parse_single_fixture(fixture: &str) -> Option<FixtureEntry> {
+    if !fixture.lines().any(|it| it.trim_start().starts_with("//-")) {
+        return None;
+    }
+
+    let fixtures = parse_fixture(fixture);
+    if fixtures.len() > 1 {
+        panic!("too many fixtures");
+    }
+    fixtures.into_iter().nth(0)
+}
+
 // Comparison functionality borrowed from cargo:
 
 /// Compare a line with an expected pattern.
@@ -384,6 +397,8 @@ pub fn skip_slow_tests() -> bool {
     should_skip
 }
 
+const REWRITE: bool = false;
+
 /// Asserts that `expected` and `actual` strings are equal. If they differ only
 /// in trailing or leading whitespace the test won't fail and
 /// the contents of `actual` will be written to the file located at `path`.
@@ -399,7 +414,6 @@ fn assert_equal_text(expected: &str, actual: &str, path: &Path) {
         fs::write(path, actual).unwrap();
         return;
     }
-    const REWRITE: bool = false;
     if REWRITE {
         println!("rewriting {}", pretty_path.display());
         fs::write(path, actual).unwrap();