1 files changed, 40 insertions, 0 deletions
diff --git a/vendor/env_logger/tests/init-twice-retains-filter.rs b/vendor/env_logger/tests/init-twice-retains-filter.rs
new file mode 100644
index 000000000..673da3fd2
--- /dev/null
+++ b/vendor/env_logger/tests/init-twice-retains-filter.rs
@@ -0,0 +1,40 @@
+extern crate env_logger;
+extern crate log;
+
+use std::env;
+use std::process;
+use std::str;
+
+fn main() {
+    if env::var("YOU_ARE_TESTING_NOW").is_ok() {
+        // Init from the env (which should set the max level to `Debug`)
+        env_logger::init();
+
+        assert_eq!(log::LevelFilter::Debug, log::max_level());
+
+        // Init again using a different max level
+        // This shouldn't clobber the level that was previously set
+        env_logger::Builder::new()
+            .parse_filters("info")
+            .try_init()
+            .unwrap_err();
+
+        assert_eq!(log::LevelFilter::Debug, log::max_level());
+        return;
+    }
+
+    let exe = env::current_exe().unwrap();
+    let out = process::Command::new(exe)
+        .env("YOU_ARE_TESTING_NOW", "1")
+        .env("RUST_LOG", "debug")
+        .output()
+        .unwrap_or_else(|e| panic!("Unable to start child process: {}", e));
+    if out.status.success() {
+        return;
+    }
+
+    println!("test failed: {}", out.status);
+    println!("--- stdout\n{}", str::from_utf8(&out.stdout).unwrap());
+    println!("--- stderr\n{}", str::from_utf8(&out.stderr).unwrap());
+    process::exit(1);
+}