🎨 style: fix clippy warnings and clean up test code

src/gmail_client/message_summary.rs

@@ -227,7 +227,9 @@ mod tests {
 
         // Set up a realistic date and subject
         summary.set_date(Some("2023-12-25 10:30:00 GMT".to_string()));
-        summary.set_subject(Some("This is a very long subject that should be elided".to_string()));
+        summary.set_subject(Some(
+            "This is a very long subject that should be elided".to_string(),
+        ));
 
         let display = summary.list_date_and_subject();
 
@@ -278,7 +280,7 @@ mod tests {
         summary.set_subject(Some("Debug Subject".to_string()));
         summary.set_date(Some("2023-12-25".to_string()));
 
-        let debug_str = format!("{:?}", summary);
+        let debug_str = format!("{summary:?}");
 
         // Verify the debug output contains expected fields
         assert!(debug_str.contains("MessageSummary"));
@@ -308,7 +310,10 @@ mod tests {
         let test_cases = vec![
             ("", "Empty ID"),
             ("a", "Single char ID"),
-            ("very_long_message_id_that_exceeds_normal_length_expectations_123456789", "Very long ID"),
+            (
+                "very_long_message_id_that_exceeds_normal_length_expectations_123456789",
+                "Very long ID",
+            ),
             ("msg-with-dashes", "ID with dashes"),
             ("msg_with_underscores", "ID with underscores"),
             ("123456789", "Numeric ID"),
@@ -316,7 +321,7 @@ mod tests {
 
         for (id, description) in test_cases {
             let summary = MessageSummary::new(id);
-            assert_eq!(summary.id(), id, "Failed for case: {}", description);
+            assert_eq!(summary.id(), id, "Failed for case: {description}");
         }
     }
 }

tests/gmail_client_unit_tests.rs

@@ -3,10 +3,9 @@
 //! These tests focus on testing the individual components and methods of the Gmail client
 //! that can be tested without requiring actual Gmail API calls.
 
-use cull_gmail::{GmailClient, ClientConfig};
-
 /// Test module for Gmail client functionality
 mod gmail_client_tests {
+    use cull_gmail::ClientConfig;
 
     /// Test the default max results constant
     #[test]
@@ -15,7 +14,9 @@ mod gmail_client_tests {
         assert_eq!(default_max, "200");
 
         // Verify it can be parsed as u32
-        let parsed: u32 = default_max.parse().expect("DEFAULT_MAX_RESULTS should be a valid u32");
+        let parsed: u32 = default_max
+            .parse()
+            .expect("DEFAULT_MAX_RESULTS should be a valid u32");
         assert_eq!(parsed, 200);
     }
 
@@ -28,54 +29,23 @@ mod gmail_client_tests {
 
         // Gmail API supports up to 500 results per page
         assert!(default_max > 0, "Max results should be positive");
-        assert!(default_max <= 500, "Max results should not exceed Gmail API limit");
-        assert!(default_max >= 10, "Max results should be reasonable for performance");
+        assert!(
+            default_max <= 500,
+            "Max results should not exceed Gmail API limit"
+        );
+        assert!(
+            default_max >= 10,
+            "Max results should be reasonable for performance"
+        );
     }
 
-    /// Test Debug implementation for GmailClient
-    /// This test doesn't need actual Gmail authentication since Debug works on the struct fields
+    /// Test that ClientConfig builder compiles and creates a config
     #[test]
-    fn test_gmail_client_debug() {
-        // We can't easily construct a GmailClient without authentication,
-        // so we'll test the debug formatting indirectly by checking the implementation exists
-        // and that it's properly named in the debug output structure.
-        
-        // This test mainly ensures the Debug trait is properly implemented
-        // and doesn't panic or cause compilation issues
-        
-        // Note: A full test would require mocking the Gmail authentication,
-        // which is complex and beyond the scope of unit tests
-        assert!(true, "Debug trait implementation compiles successfully");
-    }
-}
-
-/// Tests for public API constants and utilities
-mod public_api_tests {
-    use cull_gmail::ClientConfig;
-    
-    #[test]
-    fn test_client_config_builder_basic() {
-        // Test that ClientConfig builder works and creates valid configs
-        let config = ClientConfig::builder()
-            .with_client_id("test-client-id")
+    fn test_client_config_builder_works() {
+        let _config = ClientConfig::builder()
+            .with_client_id("test-id")
             .with_client_secret("test-secret")
             .build();
-            
-        // Basic validation that config was created successfully
-        // (We can't easily test the internal fields without making them public)
-        // This at least ensures the builder pattern compiles and doesn't panic
-        assert!(true, "ClientConfig builder works without panicking");
-    }
-    
-    #[test]
-    fn test_client_config_builder_chain() {
-        // Test that builder methods can be chained
-        let _config = ClientConfig::builder()
-            .with_client_id("client")
-            .with_client_secret("secret")
-            .build();
-            
-        // If we reach this point, the chaining worked
-        assert!(true, "Builder method chaining works");
+        // Test passes if we reach here without panicking
     }
 }