Fix filtered test reporting

Author: oli-obk

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 * report an error instead of panicking when encountering a suggestion that does not belong to the main file.
+* number of filtered tests is now > 0 when things actually got filtered.
 
 ### Changed
 

src/lib.rs

@@ -139,8 +139,10 @@ pub fn run_tests(mut config: Config) -> Result<()> {
 
 /// The filter used by `run_tests` to only run on `.rs` files that are
 /// specified by [`Config::filter_files`] and [`Config::skip_files`].
-pub fn default_file_filter(path: &Path, config: &Config) -> bool {
-    path.extension().is_some_and(|ext| ext == "rs") && default_any_file_filter(path, config)
+/// Returns `None` if there is no extension or the extension is not `.rs`.
+pub fn default_file_filter(path: &Path, config: &Config) -> Option<bool> {
+    path.extension().filter(|&ext| ext == "rs")?;
+    Some(default_any_file_filter(path, config))
 }
 
 /// Run on all files that are specified by [`Config::filter_files`] and
@@ -203,8 +205,6 @@ pub enum TestOk {
     Ok,
     /// The test was ignored due to a rule (`//@only-*` or `//@ignore-*`)
     Ignored,
-    /// The test was filtered with the `file_filter` argument.
-    Filtered,
 }
 
 /// The possible results a single test can have.
@@ -233,9 +233,12 @@ struct TestRun {
 /// All `configs` are being run in parallel.
 /// If multiple configs are provided, the [`Config::threads`] value of the first one is used;
 /// the thread count of all other configs is ignored.
+/// The file filter is supposed to return `None` if it was filtered because of file extensions
+/// and `Some(false)` if the file was rejected out of other reasons like the file path not matching
+/// a user defined filter.
 pub fn run_tests_generic(
     mut configs: Vec<Config>,
-    file_filter: impl Fn(&Path, &Config) -> bool + Sync,
+    file_filter: impl Fn(&Path, &Config) -> Option<bool> + Sync,
     per_file_config: impl Fn(&mut Config, &Path, &[u8]) + Sync,
     status_emitter: impl StatusEmitter + Send,
 ) -> Result<()> {
@@ -275,6 +278,7 @@ pub fn run_tests_generic(
         },
     };
 
+    let mut filtered = 0;
     run_and_collect(
         num_threads,
         |submit| {
@@ -297,10 +301,14 @@ pub fn run_tests_generic(
                     for entry in entries {
                         todo.push_back((entry, config));
                     }
-                } else if file_filter(&path, config) {
-                    let status = status_emitter.register_test(path);
-                    // Forward .rs files to the test workers.
-                    submit.send((status, config)).unwrap();
+                } else if let Some(matched) = file_filter(&path, config) {
+                    if matched {
+                        let status = status_emitter.register_test(path);
+                        // Forward .rs files to the test workers.
+                        submit.send((status, config)).unwrap();
+                    } else {
+                        filtered += 1;
+                    }
                 }
             }
         },
@@ -357,13 +365,11 @@ pub fn run_tests_generic(
     let mut failures = vec![];
     let mut succeeded = 0;
     let mut ignored = 0;
-    let mut filtered = 0;
 
     for run in results {
         match run.result {
             Ok(TestOk::Ok) => succeeded += 1,
             Ok(TestOk::Ignored) => ignored += 1,
-            Ok(TestOk::Filtered) => filtered += 1,
             Err(errored) => failures.push((run.status, errored)),
         }
     }

src/status_emitter.rs

@@ -217,7 +217,6 @@ impl TestStatus for TextTest {
                 Ok(TestOk::Ok) => "ok".green(),
                 Err(Errored { .. }) => "FAILED".bright_red().bold(),
                 Ok(TestOk::Ignored) => "ignored (in-test comment)".yellow(),
-                Ok(TestOk::Filtered) => return,
             };
             let old_msg = self.msg();
             let msg = format!("... {result}");

tests/integration.rs

@@ -98,25 +98,29 @@ fn main() -> Result<()> {
                 .ends_with("-fail");
             if cfg!(windows) && path.components().any(|c| c.as_os_str() == "basic-bin") {
                 // on windows there's also a .pdb file, so we get additional errors that aren't there on other platforms
-                return false;
+                return Some(false);
             }
-            path.ends_with("Cargo.toml")
-                && path.parent().unwrap().parent().unwrap() == root_dir
-                && match config
-                    .comment_defaults
-                    .base_immut()
-                    .mode
-                    .as_deref()
-                    .unwrap()
-                {
-                    Mode::Pass => !fail,
-                    // This is weird, but `cargo test` returns 101 instead of 1 when
-                    // multiple [[test]]s exist. If there's only one test, it returns
-                    // 1 on failure.
-                    Mode::Panic => fail,
-                    Mode::Run { .. } | Mode::Yolo { .. } | Mode::Fail { .. } => unreachable!(),
-                }
-                && default_any_file_filter(path, config)
+            if !path.ends_with("Cargo.toml") {
+                return None;
+            }
+            Some(
+                path.parent().unwrap().parent().unwrap() == root_dir
+                    && match config
+                        .comment_defaults
+                        .base_immut()
+                        .mode
+                        .as_deref()
+                        .unwrap()
+                    {
+                        Mode::Pass => !fail,
+                        // This is weird, but `cargo test` returns 101 instead of 1 when
+                        // multiple [[test]]s exist. If there's only one test, it returns
+                        // 1 on failure.
+                        Mode::Panic => fail,
+                        Mode::Run { .. } | Mode::Yolo { .. } | Mode::Fail { .. } => unreachable!(),
+                    }
+                    && default_any_file_filter(path, config),
+            )
         },
         |_, _, _| {},
         (