Auto merge of #14429 - szeged:syntax-to-type-error, r=jdm

Replace Syntax with TypeError in bluetoothuuid.rs

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1. Replacing `SyntaxError` with `TypeError` in `bluetoothuuid.rs` due to the specification change.
This indicates changes in the existing tests.
The error strings are from the chromium implementation.
2. We missed out a `$` character from the end of the `VALID_UUID_REGEX` global variable.

---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors

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- [x] There are tests for these changes OR

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components/script/dom/bluetoothuuid.rs

@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use dom::bindings::codegen::UnionTypes::StringOrUnsignedLong;
-use dom::bindings::error::Error::Syntax;
+use dom::bindings::error::Error::Type;
 use dom::bindings::error::Fallible;
 use dom::bindings::reflector::Reflector;
 use dom::bindings::str::DOMString;
@@ -267,7 +267,19 @@ const BASE_UUID: &'static str = "-0000-1000-8000-00805f9b34fb";
 const SERVICE_PREFIX: &'static str = "org.bluetooth.service";
 const CHARACTERISTIC_PREFIX: &'static str = "org.bluetooth.characteristic";
 const DESCRIPTOR_PREFIX: &'static str = "org.bluetooth.descriptor";
-const VALID_UUID_REGEX: &'static str = "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}";
+const VALID_UUID_REGEX: &'static str = "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$";
+// https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/bluetooth/BluetoothUUID.cpp?l=314
+const UUID_ERROR_MESSAGE: &'static str = "It must be a valid UUID alias (e.g. 0x1234), \
+    UUID (lowercase hex characters e.g. '00001234-0000-1000-8000-00805f9b34fb'),\nor recognized standard name from";
+// https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/bluetooth/BluetoothUUID.cpp?l=321
+const SERVICES_ERROR_MESSAGE: &'static str = "https://developer.bluetooth.org/gatt/services/Pages/ServicesHome.aspx\
+    \ne.g. 'alert_notification'.";
+// https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/bluetooth/BluetoothUUID.cpp?l=327
+const CHARACTERISTIC_ERROR_MESSAGE: &'static str = "https://developer.bluetooth.org/gatt/characteristics/Pages/\
+    CharacteristicsHome.aspx\ne.g. 'aerobic_heart_rate_lower_limit'.";
+// https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/bluetooth/BluetoothUUID.cpp?l=333
+const DESCRIPTOR_ERROR_MESSAGE: &'static str = "https://developer.bluetooth.org/gatt/descriptors/Pages/\
+    DescriptorsHomePage.aspx\ne.g. 'gatt.characteristic_presentation_format'.";
 
 impl BluetoothUUID {
     // https://webbluetoothcg.github.io/web-bluetooth/#dom-bluetoothuuid-canonicaluuid
@@ -325,22 +337,35 @@ fn resolve_uuid_name(
         prefix: &str)
         -> Fallible<DOMString> {
     match name {
-        // Step 1
+        // Step 1.
         StringOrUnsignedLong::UnsignedLong(unsigned32) => {
             Ok(canonical_uuid(unsigned32))
         },
         StringOrUnsignedLong::String(dstring) => {
-        // Step 2
+        // Step 2.
             let regex = Regex::new(VALID_UUID_REGEX).unwrap();
             if regex.is_match(&*dstring) {
                 Ok(dstring)
             } else {
-            // Step 3
+            // Step 3.
                 let concatenated = format!("{}.{}", prefix, dstring);
                 let is_in_table = assigned_numbers_table.iter().find(|p| p.0 == concatenated);
                 match is_in_table {
                     Some(&(_, alias)) => Ok(canonical_uuid(alias)),
-                    None => Err(Syntax),
+                    None => {
+                        let (attribute_type, error_url_message) = match prefix {
+                            SERVICE_PREFIX => ("Service", SERVICES_ERROR_MESSAGE),
+                            CHARACTERISTIC_PREFIX => ("Characteristic", CHARACTERISTIC_ERROR_MESSAGE),
+                            DESCRIPTOR_PREFIX => ("Descriptor", DESCRIPTOR_ERROR_MESSAGE),
+                            _ => unreachable!(),
+                        };
+                        // Step 4.
+                        return Err(Type(format!("Invalid {} name : '{}'.\n{} {}",
+                                                attribute_type,
+                                                dstring,
+                                                UUID_ERROR_MESSAGE,
+                                                error_url_message)));
+                    },
                 }
             }
         },