Initial commit

spec/api/v2/coin_gecko/tickers_spec.rb

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+# encoding: UTF-8
+# frozen_string_literal: true
+
+describe API::V2::CoinGecko::Tickers, type: :request do
+  describe 'GET /api/v2/coingecko/tickers' do
+    before(:each) { delete_measurments('trades') }
+    after(:each) { delete_measurments('trades') }
+
+    before do
+      create_list(:order_bid, 5, :btcusd)
+      create_list(:order_ask, 5, :btcusd)
+    end
+
+    context 'no trades executed yet' do
+      let(:expected_btcusd_ticker) do
+        {
+            'ticker_id' => 'BTC_USD',
+            'base_currency' => 'BTC',
+            'target_currency' => 'USD',
+            'last_price' => '0.0',
+            'target_volume' => '0.0', 'base_volume' => '0.0',
+            'bid' => '1.0', 'ask' => '1.0',
+            'high' => '0.0', 'low' => '0.0'
+        }
+      end
+
+      let(:expected_btceth_ticker) do
+        {
+            'ticker_id' => 'BTC_ETH',
+            'base_currency' => 'BTC',
+            'target_currency' => 'ETH',
+            'last_price' => '0.0',
+            'target_volume' => '0.0', 'base_volume' => '0.0',
+            'bid' => '0.0', 'ask' => '0.0',
+            'high' => '0.0', 'low' => '0.0'
+        }
+      end
+
+      it 'returns tickers of all markets' do
+        get '/api/v2/coingecko/tickers'
+        expect(response).to be_successful
+
+        btc_usd_ticker = response_body.find {|ticker| ticker['ticker_id'] == 'BTC_USD'}
+        btc_eth_ticker = response_body.find {|ticker| ticker['ticker_id'] == 'BTC_ETH'}
+        expect(btc_usd_ticker).to eq expected_btcusd_ticker
+        expect(btc_eth_ticker).to eq expected_btceth_ticker
+      end
+    end
+
+    context 'single trade was executed' do
+      let!(:trade) { create(:trade, :btcusd, price: '5.0'.to_d, amount: '1.1'.to_d, total: '5.5'.to_d)}
+
+      let(:expected_ticker) do
+        {
+            'ticker_id' => 'BTC_USD',
+            'base_currency' => 'BTC',
+            'target_currency' => 'USD',
+            'last_price' => '5.0',
+            'target_volume' => '5.5', 'base_volume' => '1.1',
+            'bid' => '1.0', 'ask' => '1.0',
+            'high' => '5.0', 'low' => '5.0'
+        }
+      end
+
+      before do
+        trade.write_to_influx
+      end
+
+      it 'returns tickers of all markets' do
+        get '/api/v2/coingecko/tickers'
+        expect(response).to be_successful
+
+        btc_usd_ticker = response_body.find {|ticker| ticker['ticker_id'] == 'BTC_USD'}
+        expect(btc_usd_ticker).to eq expected_ticker
+      end
+    end
+
+    context 'multiple trades were executed' do
+      let!(:trade1) { create(:trade, :btcusd, price: '5.0'.to_d, amount: '1.1'.to_d, total: '5.5'.to_d)}
+      let!(:trade2) { create(:trade, :btcusd, price: '6.0'.to_d, amount: '0.9'.to_d, total: '5.4'.to_d)}
+
+      let(:expected_ticker) do
+        {
+            'ticker_id' => 'BTC_USD',
+            'base_currency' => 'BTC',
+            'target_currency' => 'USD',
+            'last_price' => '6.0',
+            'target_volume' => '10.9', 'base_volume' => '2.0',
+            'bid' => '1.0', 'ask' => '1.0',
+            'high' => '6.0', 'low' => '5.0'
+        }
+      end
+      before do
+        trade1.write_to_influx
+        trade2.write_to_influx
+      end
+
+      it 'returns tickers of all markets' do
+        get '/api/v2/coingecko/tickers'
+        expect(response).to be_successful
+
+        btc_usd_ticker = response_body.find {|ticker| ticker['ticker_id'] == 'BTC_USD'}
+        expect(btc_usd_ticker).to eq expected_ticker
+      end
+    end
+  end
+end