add exchange data source unit test

pkg/exchangerates/national_bank_of_poland_datasource_test.go

@@ -0,0 +1,120 @@
+package exchangerates
+
+import (
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/mayswind/lab/pkg/core"
+	"github.com/mayswind/lab/pkg/models"
+)
+
+const nationalBankOfPolandMinimumRequiredContent = "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n" +
+	"<exchange_rates table=\"A\" date=\"2021-04-02\" number=\"064/A/NBP/2021\" uid=\"21a064\">\n" +
+	"  <mid-rate currency=\"US Dollar\" units=\"1\" code=\"USD\">3.8986</mid-rate>\n" +
+	"  <mid-rate currency=\"Yuan Renminbi\" units=\"1\" code=\"CNY\">0.5941</mid-rate>\n" +
+	"</exchange_rates>"
+
+func TestNationalBankOfPolandDataSource_StandardDataExtractBaseCurrency(t *testing.T) {
+	dataSource := &NationalBankOfPolandDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(nationalBankOfPolandMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Equal(t, "PLN", actualLatestExchangeRateResponse.BaseCurrency)
+}
+
+func TestNationalBankOfPolandDataSource_StandardDataExtractExchangeRates(t *testing.T) {
+	dataSource := &NationalBankOfPolandDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(nationalBankOfPolandMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "USD",
+		Rate:     "0.25650233417124096",
+	})
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "CNY",
+		Rate:     "1.68321831341525",
+	})
+}
+
+func TestNationalBankOfPolandDataSource_BlankContent(t *testing.T) {
+	dataSource := &NationalBankOfPolandDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte(""))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestNationalBankOfPolandDataSource_OnlyXMLHeader(t *testing.T) {
+	dataSource := &NationalBankOfPolandDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestNationalBankOfPolandDataSource_EmptyExchangeRatesContent(t *testing.T) {
+	dataSource := &NationalBankOfPolandDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"+
+		"<exchange_rates table=\"A\" date=\"2021-04-02\" number=\"064/A/NBP/2021\" uid=\"21a064\">\n"+
+		"</exchange_rates>"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestNationalBankOfPolandDataSource_InvalidCurrency(t *testing.T) {
+	dataSource := &NationalBankOfPolandDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"+
+		"<exchange_rates table=\"A\" date=\"2021-04-02\" number=\"064/A/NBP/2021\" uid=\"21a064\">\n"+
+		"  <mid-rate currency=\"XXX\" units=\"1\" code=\"XXX\">1</mid-rate>\n"+
+		"</exchange_rates>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestNationalBankOfPolandDataSource_EmptyRate(t *testing.T) {
+	dataSource := &NationalBankOfPolandDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"+
+		"<exchange_rates table=\"A\" date=\"2021-04-02\" number=\"064/A/NBP/2021\" uid=\"21a064\">\n"+
+		"  <mid-rate currency=\"US Dollar\" units=\"1\" code=\"USD\"></mid-rate>\n"+
+		"</exchange_rates>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestNationalBankOfPolandDataSource_InvalidRate(t *testing.T) {
+	dataSource := &NationalBankOfPolandDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"+
+		"<exchange_rates table=\"A\" date=\"2021-04-02\" number=\"064/A/NBP/2021\" uid=\"21a064\">\n"+
+		"  <mid-rate currency=\"US Dollar\" units=\"1\" code=\"USD\">null</mid-rate>\n"+
+		"</exchange_rates>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}