add tests

Author: yaacov

Gemfile

@@ -10,7 +10,6 @@ gem 'faraday'
 
 group :test do
   gem 'coveralls'
-  gem 'fakeweb'
   gem 'json', '< 2.0' if ruby_version?('< 2.0')
   gem 'rack', '< 2.0' if ruby_version?('< 2.2.2')
   gem 'rack-test'
@@ -20,4 +19,5 @@ group :test do
   gem 'term-ansicolor', '< 1.4' if ruby_version?('< 2.0')
   gem 'tins', '< 1.7' if ruby_version?('< 2.0')
   gem 'vcr'
+  gem 'webmock'
 end

spec/prometheus/api_client/cadvisor_spec.rb

@@ -0,0 +1,56 @@
+# encoding: UTF-8
+
+require 'prometheus/api_client'
+require 'webmock'
+require 'vcr'
+
+VCR.configure do |c|
+  c.cassette_library_dir = 'spec/vcr_cassettes'
+  c.hook_into :webmock
+end
+
+describe Prometheus::ApiClient::Cadvisor do
+  token = 'topSecret'
+  url = 'https://prometheus.example.com:443'
+  instance = 'example.com'
+
+  describe 'Node' do
+    it 'reads metrics' do
+      VCR.use_cassette('prometheus/api_client/cadvisor_node') do # , record: :new_episodes) do
+        prometheus = Prometheus::ApiClient::Cadvisor::Node.new(
+          instance:    instance,
+          url:         url,
+          credentials: { token: token },
+          options:     { verify_ssl: OpenSSL::SSL::VERIFY_NONE },
+        )
+
+        response = prometheus.query(
+          query: 'sum(container_cpu_usage_seconds_total)',
+          time: '2017-08-07T06:10:30.781Z',
+        )
+
+        expect(response).to be_a(Hash)
+      end
+    end
+
+    it 'reads metrics range' do
+      VCR.use_cassette('prometheus/api_client/cadvisor_node') do # , record: :new_episodes) do
+        prometheus = Prometheus::ApiClient::Cadvisor::Node.new(
+          instance:    instance,
+          url:         url,
+          credentials: { token: token },
+          options:     { verify_ssl: OpenSSL::SSL::VERIFY_NONE },
+        )
+
+        response = prometheus.query_range(
+          query: 'sum(container_cpu_usage_seconds_total)',
+          start: '2017-08-07T06:10:30.781Z',
+          end:   '2017-08-07T06:14:30.781Z',
+          step:  '120s',
+        )
+
+        expect(response).to be_a(Hash)
+      end
+    end
+  end
+end