fix: various test lints etc.

Cargo.toml

@@ -132,6 +132,10 @@ tracing-subscriber = "0.3"
 [lints]
 workspace = true
 
+[[example]]
+name = "log"
+required-features = ["log"]
+
 [[example]]
 name = "tracing"
 required-features = ["tracing"]

src/lib.rs

@@ -215,7 +215,7 @@ impl Filter {
             2 => Filter::Warn,
             3 => Filter::Info,
             4 => Filter::Debug,
-            5.. => Filter::Trace,
+            _ => Filter::Trace,
         }
     }
 }
@@ -275,10 +275,12 @@ pub trait LogLevel {
 
 #[cfg(test)]
 mod test {
+    #[allow(unused_imports)]
     use super::*;
 
     #[test]
-    fn verify_app() {
+    #[cfg(feature = "log")]
+    fn default_verbosity() {
         #[derive(Debug, clap::Parser)]
         struct Cli {
             #[command(flatten)]
@@ -288,4 +290,30 @@ mod test {
         use clap::CommandFactory;
         Cli::command().debug_assert();
     }
+
+    #[test]
+    #[cfg(feature = "log")]
+    fn verbosity_with_log() {
+        #[derive(Debug, clap::Parser)]
+        struct Cli {
+            #[command(flatten)]
+            verbose: Verbosity<InfoLevel>,
+        }
+
+        use clap::CommandFactory;
+        Cli::command().debug_assert();
+    }
+
+    #[test]
+    #[cfg(feature = "tracing")]
+    fn verbosity_with_tracing() {
+        #[derive(Debug, clap::Parser)]
+        struct Cli {
+            #[command(flatten)]
+            verbose: Verbosity<tracing::ErrorLevel>,
+        }
+
+        use clap::CommandFactory;
+        Cli::command().debug_assert();
+    }
 }