Added documentation for parsing .TCX.

Author: dblock

Gemfile

@@ -17,6 +17,7 @@ group :development, :test do
   gem 'rubocop', '1.68.0'
   gem 'rubocop-rake'
   gem 'rubocop-rspec'
+  gem 'tcx'
   gem 'vcr'
   gem 'webmock'
   gem 'webrick', '~> 1.7'

README.md

@@ -508,13 +508,18 @@ gpx.tracks # => Array[GPX::Track]
 
 #### Export Route TCX
 
-Returns a [Training Center XML](https://en.wikipedia.org/wiki/Training_Center_XML) (TCX) data of the route. Combine with [multi_xml](https://github.com/sferik/multi_xml) to parse it.
+Returns a [Training Center XML](https://en.wikipedia.org/wiki/Training_Center_XML) (TCX) data of the route. Combine with [multi_xml](https://github.com/sferik/multi_xml) or [tcx](https://github.com/dblock/tcx) to parse it.
 
 ```ruby
 data = client.export_route_tcx(16341573) # => String
 
 require 'multi_xml'
 xml = MultiXml.parse(data) # => parsed TCX
+
+require 'tcx'
+tcx = Tcx.load(data) # => Tcx::Database
+
+tcx.courses.first.name # => 'Lower Manhattan'
 ```
 
 #### Get Route

spec/spec_helper.rb

@@ -8,6 +8,7 @@
 
 require 'multi_xml'
 require 'gpx'
+require 'tcx'
 require 'polylines'
 
 Dir[File.join(File.dirname(__FILE__), 'support', '**/*.rb')].each do |file|

spec/strava/api/client/endpoints/routes/export_route_tcx_spec.rb

@@ -4,12 +4,31 @@
 
 RSpec.describe 'Strava::Api::Client#export_route_tcx', vcr: { cassette_name: 'client/export_route_tcx' } do
   include_context 'with API client'
-  it 'exports a route file' do
-    route = client.export_route_tcx(id: 16_341_573)
-    expect(route).to start_with "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<TrainingCenterDatabase"
 
-    xml = MultiXml.parse(route)
-    expect(xml).to be_a Hash
+  describe 'an exported route' do
+    let(:route) { client.export_route_tcx(id: 16_341_573) }
+
+    it 'is a TrainingCenterDatabase' do
+      expect(route).to start_with "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<TrainingCenterDatabase"
+    end
+
+    describe 'as xml' do
+      let(:xml) { MultiXml.parse(route) }
+
+      it 'is valid XML' do
+        expect(xml).to be_a Hash
+      end
+    end
+
+    describe 'as parsed tcx' do
+      let(:tcx) { Tcx.load(route) }
+
+      it 'is valid' do
+        expect(tcx).to be_a(Tcx::Database)
+        expect(tcx.courses.count).to eq 1
+        expect(tcx.courses.first.name).to eq 'Lower Manhattan'
+      end
+    end
   end
 
   it 'exports a route file by id' do