refactor: simplify float precision test assertion

IWANABETHATGUY · claude · IWANABETHATGUY · commit 52d9ee544ea4 · 2026-03-22T21:08:00.000+08:00
Co-Authored-By: Claude Opus 4.6 (1M context) &lt;noreply@anthropic.com&gt;
diff --git a/crates/rolldown_common/src/ecmascript/json_to_program.rs b/crates/rolldown_common/src/ecmascript/json_to_program.rs
@@ -171,8 +171,6 @@ mod tests {
     assert_snapshot!(to_code(&serde_json::from_str::<Value>(r#"{"a": 1, "a": 2}"#).unwrap()), @r#"({ "a": 2 });"#);
   }
 
-  /// Test that 17-significant-digit floats roundtrip correctly through JSON→AST→codegen.
-  /// The codegen may use a shorter representation (e.g. 15 digits) if it roundtrips to the same f64.
   /// Regression test for https://github.com/vitejs/vite/issues/21982
   #[test]
   fn test_float_17_significant_digits() {
@@ -186,16 +184,9 @@ mod tests {
       r"[114.35143799257997, 406.31486713248995, 163.41498018498498, 364.09498724900986]",
     )
     .unwrap();
-    let code = to_code(&json);
-
-    // Extract numbers from generated code and verify they parse to the same f64 values
-    for expected in &inputs {
-      let found = code
-        .split(|c: char| !c.is_ascii_digit() && c != '.' && c != '-')
-        .filter_map(|s| s.parse::<f64>().ok())
-        .any(|v| v.to_bits() == expected.to_bits());
-      assert!(found, "f64 value {expected} not found (same bits) in output: {code}");
-    }
+    let code: String = to_code(&json).chars().filter(|c| !c.is_whitespace()).collect();
+    let expected = format!("[{}];", inputs.map(|v| v.to_string()).join(","));
+    assert_eq!(code, expected);
   }
 
   #[test]
