Bug 1677763 - [mozdevice-rust] Added tests for formatting own DeviceError types. r=webdriver-reviewers,jgraham

Those checks will make sure that we don't enter
an infinite loop anymore when trying to format
one of our own DeviceError types.

Skupin <mail@hskupin.info> HG: branch 'default' HG: bookmark 'geckodriver_overflow' HG: changed
testing/mozbase/rust/mozdevice/src/test.rs

Differential Revision: https://phabricator.services.mozilla.com/D109057

testing/mozbase/rust/mozdevice/src/test.rs

@@ -506,3 +506,24 @@ fn device_push_dir() {
         },
     );
 }
+
+#[test]
+fn format_own_device_error_types() {
+    assert_eq!(
+        format!("{}", DeviceError::InvalidStorage),
+        "Invalid storage".to_string()
+    );
+    assert_eq!(
+        format!("{}", DeviceError::MissingPackage),
+        "Missing package".to_string()
+    );
+    assert_eq!(
+        format!("{}", DeviceError::MultipleDevices),
+        "Multiple Android devices online".to_string()
+    );
+
+    assert_eq!(
+        format!("{}", DeviceError::Adb("foo".to_string())),
+        "foo".to_string()
+    );
+}