improve the fuzzer of the flatten crate

flatten-serde-json/fuzz/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "flatten_serde_json-fuzz"
+name = "flatten-serde-json-fuzz"
 version = "0.0.0"
 authors = ["Automatically generated"]
 publish = false
@@ -11,8 +11,9 @@ cargo-fuzz = true
 [dependencies]
 libfuzzer-sys = "0.4"
 arbitrary-json = "0.1.1"
+json-depth-checker = { path = "../../json-depth-checker" }
 
-[dependencies.flatten_serde_json]
+[dependencies.flatten-serde-json]
 path = ".."
 
 # Prevent this from interfering with workspaces

flatten-serde-json/fuzz/fuzz_targets/flatten.rs

@@ -1,8 +1,12 @@
 #![no_main]
 use arbitrary_json::ArbitraryObject;
 use flatten_serde_json::flatten;
+use json_depth_checker::should_flatten_from_value;
 use libfuzzer_sys::fuzz_target;
 
 fuzz_target!(|object: ArbitraryObject| {
-    let _ = flatten(&object);
+    let object = flatten(&object);
+    if !object.is_empty() {
+        assert!(object.values().any(|value| !should_flatten_from_value(value)));
+    }
 });