style: format config tests and fix clippy import

src/api/msn/parse.rs

@@ -30,7 +30,6 @@ pub(crate) fn parse_fundamentals_from_str(
 #[cfg(test)]
 mod tests {
     use super::{parse_fundamentals_from_str, parse_quote_from_str};
-    use crate::api::types::Period;
 
     #[test]
     fn parses_quote_fixture_json() {

src/config.rs

@@ -426,38 +426,39 @@ mod tests {
     fn validate_rejects_invalid_history_provider() {
         let result = super::validate_config_key_value("general.history_provider", "bogus");
         assert!(result.is_err());
-        assert!(result
+        assert!(
+            result
                 .unwrap_err()
                 .to_string()
-            .contains("invalid history provider"));
+                .contains("invalid history provider")
+        );
     }
 
     #[test]
     fn validate_accepts_valid_history_provider_auto() {
-        assert!(
+        assert!(super::validate_config_key_value("general.history_provider", "auto").is_ok());
-            super::validate_config_key_value("general.history_provider", "auto").is_ok()
-        );
     }
 
     #[test]
     fn validate_accepts_valid_history_provider_yahoo() {
-        assert!(
+        assert!(super::validate_config_key_value("general.history_provider", "yahoo").is_ok());
-            super::validate_config_key_value("general.history_provider", "yahoo").is_ok()
-        );
     }
 
     #[test]
     fn validate_accepts_valid_history_provider_msn() {
-        assert!(
+        assert!(super::validate_config_key_value("general.history_provider", "msn").is_ok());
-            super::validate_config_key_value("general.history_provider", "msn").is_ok()
-        );
     }
 
     #[test]
     fn validate_rejects_invalid_output() {
         let result = super::validate_config_key_value("general.output", "bogus");
         assert!(result.is_err());
-        assert!(result.unwrap_err().to_string().contains("invalid output format"));
+        assert!(
+            result
+                .unwrap_err()
+                .to_string()
+                .contains("invalid output format")
+        );
     }
 
     #[test]
@@ -480,17 +481,24 @@ mod tests {
     fn validate_rejects_negative_ttl() {
         let result = super::validate_config_key_value("cache.quote_ttl", "-1");
         assert!(result.is_err());
-        assert!(result.unwrap_err().to_string().contains("must be non-negative"));
+        assert!(
+            result
+                .unwrap_err()
+                .to_string()
+                .contains("must be non-negative")
+        );
     }
 
     #[test]
     fn validate_rejects_non_numeric_ttl() {
         let result = super::validate_config_key_value("cache.quote_ttl", "not-a-number");
         assert!(result.is_err());
-        assert!(result
+        assert!(
+            result
                 .unwrap_err()
                 .to_string()
-            .contains("must be a non-negative integer"));
+                .contains("must be a non-negative integer")
+        );
     }
 
     #[test]
@@ -522,7 +530,12 @@ mod tests {
     fn validate_rejects_invalid_color() {
         let result = super::validate_config_key_value("general.color", "foo");
         assert!(result.is_err());
-        assert!(result.unwrap_err().to_string().contains("invalid color value"));
+        assert!(
+            result
+                .unwrap_err()
+                .to_string()
+                .contains("invalid color value")
+        );
 
         let result = super::validate_config_key_value("general.color", "123");
         assert!(result.is_err());