Add fuzz_parallel test

cargo-test-fuzz/Cargo.toml

@@ -47,6 +47,7 @@ rustc_version = "0.4"
 semver = "1.0"
 serde_json = "1.0"
 tempfile = "3.10"
+walkdir = "2.5"
 xshell = "0.2"
 
 testing = { path = "../testing", package = "test-fuzz-testing" }

cargo-test-fuzz/tests/fuzz_parallel.rs

@@ -0,0 +1,46 @@
+use internal::dirs::output_directory_from_target;
+use predicates::prelude::*;
+use std::{ffi::OsStr, fs::remove_dir_all};
+use testing::{examples, retry, CommandExt};
+
+const CPUS: &str = "2";
+const TIME_SLICE: &str = "30";
+
+#[test]
+fn fuzz_parallel() {
+    for i in 0..6 {
+        let output_dir = output_directory_from_target("parallel", &format!("target_{i}"));
+        remove_dir_all(output_dir).unwrap_or_default();
+    }
+
+    examples::test("parallel", "test")
+        .unwrap()
+        .logged_assert()
+        .success();
+
+    retry(3, || {
+        examples::test_fuzz_inexact("parallel", "target")
+            .unwrap()
+            .args([
+                "--exit-code",
+                "--run-until-crash",
+                "--cpus",
+                CPUS,
+                "--slice",
+                TIME_SLICE,
+            ])
+            .logged_assert()
+            .try_code(predicate::eq(1))
+    })
+    .unwrap();
+
+    // smoelius: Verify that all `.cur_input` files were removed.
+    for i in 0..6 {
+        let output_dir = output_directory_from_target("parallel", &format!("target_{i}"));
+        if output_dir.exists() {
+            assert!(!walkdir::WalkDir::new(output_dir)
+                .into_iter()
+                .any(|entry| entry.unwrap().path().file_name() == Some(OsStr::new(".cur_input"))));
+        }
+    }
+}

examples/tests/parallel.rs

@@ -0,0 +1,29 @@
+#[test_fuzz::test_fuzz]
+fn target_0(x: bool) {}
+
+#[test_fuzz::test_fuzz]
+fn target_1(x: bool) {}
+
+#[test_fuzz::test_fuzz]
+fn target_2(x: bool) {}
+
+#[test_fuzz::test_fuzz]
+fn target_3(x: bool) {
+    assert!(!x);
+}
+
+#[test_fuzz::test_fuzz]
+fn target_4(x: bool) {}
+
+#[test_fuzz::test_fuzz]
+fn target_5(x: bool) {}
+
+#[test]
+fn test() {
+    target_0(false);
+    target_1(false);
+    target_2(false);
+    target_3(false);
+    target_4(false);
+    target_5(false);
+}

testing/src/examples.rs

@@ -110,3 +110,10 @@ pub fn test_fuzz(krate: &str, target: &str) -> Result<Command> {
         command
     })
 }
+
+pub fn test_fuzz_inexact(krate: &str, target: &str) -> Result<Command> {
+    test_fuzz_all().map(|mut command| {
+        command.args(["--test", krate, target]);
+        command
+    })
+}