Uniformly set default log level to INFO

Commit a98f548 ("Capture INFO and WARN from tracing by default")
adjusted the tracing part of the crate to use the INFO log level by
default. With this change we switch the log part over to doing the same.

CHANGELOG.md

@@ -1,3 +1,8 @@
+Unreleased
+----------
+- Changed default log level to `INFO`
+
+
 0.2.16
 ------
 - Use `tracing-subscriber`'s `tracing-log` feature to unify log output

README.md

@@ -102,10 +102,11 @@ $ cargo test -- --nocapture
 ```
 
 Furthermore, the `RUST_LOG` environment variable is honored and can be
-used to influence the log level to work with (among other things).
-Please refer to the [`env_logger` docs][env-docs-rs] and
+used to influence the log level to work with (among other things). By
+default, log messages of criticality `INFO` (and higher) will be
+emitted. Please refer to the [`env_logger` docs][env-docs-rs] and
 [`tracing-subscriber`][tracing-env-docs-rs] documentation for supported
-syntax and more information.
+variable syntax and more information.
 
 If the `trace` feature is enabled, the `RUST_LOG_SPAN_EVENTS`
 environment variable can be used to configure the tracing subscriber to

macros/src/lib.rs

@@ -155,21 +155,20 @@ impl AttributeArgs {
 /// Expand the initialization code for the `log` crate.
 #[cfg(all(feature = "log", not(feature = "trace")))]
 fn expand_logging_init(attribute_args: &AttributeArgs) -> Tokens {
-  let add_default_log_filter = if let Some(default_log_filter) = &attribute_args.default_log_filter
-  {
-    quote! {
-      let env_logger_builder = env_logger_builder
-        .parse_env(::test_log::env_logger::Env::default().default_filter_or(#default_log_filter));
-    }
-  } else {
-    quote! {}
-  };
+  let default_filter = attribute_args
+    .default_log_filter
+    .as_ref()
+    .unwrap_or(&::std::borrow::Cow::Borrowed("info"));
 
   quote! {
     {
-      let mut env_logger_builder = ::test_log::env_logger::builder();
-      #add_default_log_filter
-      let _ = env_logger_builder.is_test(true).try_init();
+      let _result = ::test_log::env_logger::builder()
+        .parse_env(
+          ::test_log::env_logger::Env::default()
+            .default_filter_or(#default_filter)
+        )
+        .is_test(true)
+        .try_init();
     }
   }
 }