[rust] Clean logic for checking driver version

rust/src/lib.rs

@@ -281,7 +281,9 @@ pub trait SeleniumManager {
         browser_version
     }
 
-    fn discover_driver_version(&mut self) -> Result<String, Box<dyn Error>> {
+    fn discover_or_download_browser_and_driver_version(
+        &mut self,
+    ) -> Result<String, Box<dyn Error>> {
         let mut download_browser = self.is_force_browser_download();
         let major_browser_version = self.get_major_browser_version();
 
@@ -526,22 +528,23 @@ pub trait SeleniumManager {
             }
         }
 
-        // Discover proper driver version
-        if self.get_driver_version().is_empty() {
-            match self.discover_driver_version() {
-                Ok(driver_version) => {
+        // Discover browser version (or download it, if not available and possible).
+        // With the found browser version, discover the proper driver version using online endpoints
+        match self.discover_or_download_browser_and_driver_version() {
+            Ok(driver_version) => {
+                if self.get_driver_version().is_empty() {
                     self.set_driver_version(driver_version);
                 }
-                Err(err) => {
-                    if driver_in_path_version.is_some() {
-                        self.get_logger().warn(format!(
-                            "Exception managing {}: {}",
-                            self.get_browser_name(),
-                            err
-                        ));
-                    } else {
-                        return Err(err);
-                    }
+            }
+            Err(err) => {
+                if driver_in_path_version.is_some() && driver_in_path.is_some() {
+                    self.get_logger().warn(format!(
+                        "Exception managing {}: {}",
+                        self.get_browser_name(),
+                        err
+                    ));
+                } else {
+                    return Err(err);
                 }
             }
         }
@@ -550,12 +553,9 @@ pub trait SeleniumManager {
         if let (Some(version), Some(path)) = (&driver_in_path_version, &driver_in_path) {
             // If proper driver version is not the same as the driver in path, display warning
             let major_version = self.get_major_version(version)?;
-            let driver_condition = if self.is_firefox() {
-                !version.eq(self.get_driver_version())
-            } else {
-                !major_version.eq(&self.get_major_browser_version())
-            };
-            if !self.get_driver_version().is_empty() && driver_condition {
+            if (self.is_firefox() && !version.eq(self.get_driver_version()))
+                || !major_version.eq(&self.get_major_browser_version())
+            {
                 self.get_logger().warn(format!(
                     "The {} version ({}) detected in PATH at {} might not be compatible with \
                     the detected {} version ({}); currently, {} {} is recommended for {} {}.*, \