Added support for nested closures in test name detection

src/macros.rs

@@ -7,8 +7,11 @@ macro_rules! _function_name {
         fn type_name_of_val<T>(_: T) -> &'static str {
             std::any::type_name::<T>()
         }
-        let name = type_name_of_val(f).strip_suffix("::f").unwrap_or("");
-        name.strip_suffix("::{{closure}}").unwrap_or(name)
+        let mut name = type_name_of_val(f).strip_suffix("::f").unwrap_or("");
+        while let Some(rest) = name.strip_suffix("::{{closure}}") {
+            name = rest;
+        }
+        name
     }};
 }
 

tests/snapshots/test_basic__unnamed_nested_closure.snap

@@ -0,0 +1,11 @@
+---
+source: tests/test_basic.rs
+assertion_line: 22
+expression: "vec![1, 2, 3]"
+
+---
+[
+    1,
+    2,
+    3,
+]

tests/test_basic.rs

@@ -15,6 +15,15 @@ fn test_unnamed_debug_vector() {
     assert_debug_snapshot!(vec![1, 2, 3, 4, 5]);
 }
 
+#[test]
+fn test_unnamed_nested_closure() {
+    (|| {
+        (|| {
+            assert_debug_snapshot!(vec![1, 2, 3]);
+        })();
+    })();
+}
+
 #[test]
 fn test_yaml_vector() {
     assert_yaml_snapshot!("yaml_vector", vec![1, 2, 3]);