From 7b51584c7c6e611066d66277abcffd873503114a Mon Sep 17 00:00:00 2001
From: MaysWind <i@mayswind.net>
Date: Mon, 5 Apr 2021 01:41:32 +0800
Subject: [PATCH] add exchange data source unit test

---
 .../bank_of_canada_datasource_test.go         | 196 ++++++++++++
 .../czech_national_bank_datasource_test.go    | 141 +++++++++
 .../euro_central_bank_datasource_test.go      | 150 +++++++++
 ...national_bank_of_poland_datasource_test.go | 120 ++++++++
 ...serve_bank_of_australia_datasource_test.go | 284 ++++++++++++++++++
 5 files changed, 891 insertions(+)
 create mode 100644 pkg/exchangerates/bank_of_canada_datasource_test.go
 create mode 100644 pkg/exchangerates/czech_national_bank_datasource_test.go
 create mode 100644 pkg/exchangerates/euro_central_bank_datasource_test.go
 create mode 100644 pkg/exchangerates/national_bank_of_poland_datasource_test.go
 create mode 100644 pkg/exchangerates/reserve_bank_of_australia_datasource_test.go

diff --git a/pkg/exchangerates/bank_of_canada_datasource_test.go b/pkg/exchangerates/bank_of_canada_datasource_test.go
new file mode 100644
index 00000000..bbc5318b
--- /dev/null
+++ b/pkg/exchangerates/bank_of_canada_datasource_test.go
@@ -0,0 +1,196 @@
+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 bankOfCanadaMinimumRequiredContent = "{\n" +
+	"    \"observations\": [\n" +
+	"        {\n" +
+	"            \"d\": \"2019-12-31\",\n" +
+	"            \"FXVNDCAD\": {\n" +
+	"                \"v\": \"0.000056\"\n" +
+	"            }\n" +
+	"        },\n" +
+	"        {\n" +
+	"            \"d\": \"2021-04-01\",\n" +
+	"            \"FXCNYCAD\": {\n" +
+	"                \"v\": \"0.1913\"\n" +
+	"            },\n" +
+	"            \"FXUSDCAD\": {\n" +
+	"                \"v\": \"1.2565\"\n" +
+	"            }\n" +
+	"        }\n" +
+	"    ]\n" +
+	"}"
+
+func TestBankOfCanadaDataSource_StandardDataExtractBaseCurrency(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(bankOfCanadaMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Equal(t, "CAD", actualLatestExchangeRateResponse.BaseCurrency)
+}
+
+func TestBankOfCanadaDataSource_StandardDataExtractExchangeRates(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(bankOfCanadaMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "USD",
+		Rate:     "0.7958615200955034",
+	})
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "CNY",
+		Rate:     "5.2273915316257185",
+	})
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "VND",
+		Rate:     "17857.14285714286",
+	})
+}
+
+func TestBankOfCanadaDataSource_BlankContent(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte(""))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestBankOfCanadaDataSource_EmptyJsonObject(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("{}"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestBankOfCanadaDataSource_EmptyObservationsContent(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("{"+
+		"    \"observations\": []"+
+		"}"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestBankOfCanadaDataSource_InvalidObservationFormat(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("{"+
+		"    \"observations\": [\n"+
+		"        {\n"+
+		"            \"d\": \"2021-04-01\",\n"+
+		"            \"CNYCAD\": {\n"+
+		"                \"v\": \"0.1913\"\n"+
+		"            }\n"+
+		"        }\n"+
+		"    ]\n"+
+		"}"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestBankOfCanadaDataSource_InvalidObservationFormat2(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("{"+
+		"    \"observations\": [\n"+
+		"        {\n"+
+		"            \"d\": \"2021-04-01\",\n"+
+		"            \"FXCADCNY\": {\n"+
+		"                \"v\": \"0.1913\"\n"+
+		"            }\n"+
+		"        }\n"+
+		"    ]\n"+
+		"}"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestBankOfCanadaDataSource_InvalidCurrency(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("{"+
+		"    \"observations\": [\n"+
+		"        {\n"+
+		"            \"d\": \"2021-04-01\",\n"+
+		"            \"FXXXXCAD\": {\n"+
+		"                \"v\": \"1\"\n"+
+		"            }\n"+
+		"        }\n"+
+		"    ]\n"+
+		"}"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestBankOfCanadaDataSource_EmptyRate(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("{"+
+		"    \"observations\": [\n"+
+		"        {\n"+
+		"            \"d\": \"2021-04-01\",\n"+
+		"            \"FXUSDCAD\": {\n"+
+		"                \"v\": \"\"\n"+
+		"            }\n"+
+		"        }\n"+
+		"    ]\n"+
+		"}"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestBankOfCanadaDataSource_InvalidRate(t *testing.T) {
+	dataSource := &BankOfCanadaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("{"+
+		"    \"observations\": [\n"+
+		"        {\n"+
+		"            \"d\": \"2021-04-01\",\n"+
+		"            \"FXUSDCAD\": {\n"+
+		"                \"v\": null\n"+
+		"            }\n"+
+		"        }\n"+
+		"    ]\n"+
+		"}"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
diff --git a/pkg/exchangerates/czech_national_bank_datasource_test.go b/pkg/exchangerates/czech_national_bank_datasource_test.go
new file mode 100644
index 00000000..64d908f2
--- /dev/null
+++ b/pkg/exchangerates/czech_national_bank_datasource_test.go
@@ -0,0 +1,141 @@
+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 czechNationalBankMinimumRequiredContent = "01 Apr 2021 #64\n" +
+	"Country|Currency|Amount|Code|Rate\n" +
+	"China|renminbi|1|CNY|3.379\n" +
+	"USA|dollar|1|USD|22.206\n"
+
+func TestCzechNationalBankDataSource_StandardDataExtractBaseCurrency(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(czechNationalBankMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Equal(t, "CZK", actualLatestExchangeRateResponse.BaseCurrency)
+}
+
+func TestCzechNationalBankDataSource_StandardDataExtractExchangeRates(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(czechNationalBankMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "USD",
+		Rate:     "0.04503287399801856",
+	})
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "CNY",
+		Rate:     "0.2959455460195324",
+	})
+}
+
+func TestCzechNationalBankDataSource_BlankContent(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte(""))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestCzechNationalBankDataSource_OnlyHeader(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("01 Apr 2021 #64"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestCzechNationalBankDataSource_OnlyHeaderAndTitle(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("01 Apr 2021 #64\n"+
+		"Country|Currency|Amount|Code|Rate"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestCzechNationalBankDataSource_TitleMissingCode(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("01 Apr 2021 #64\n"+
+		"Country|Currency|Amount|Rate\n"+
+		"China|renminbi|1|3.379\n"+
+		"USA|dollar|1|22.206\n"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestCzechNationalBankDataSource_TitleMissingRate(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("01 Apr 2021 #64\n"+
+		"Country|Currency|Amount|Code\n"+
+		"China|renminbi|1|CNY\n"+
+		"USA|dollar|1|USD\n"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestCzechNationalBankDataSource_InvalidCurrency(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("01 Apr 2021 #64\n"+
+		"Country|Currency|Amount|Code|Rate\n"+
+		"XXX|xxx|1|XXX|1\n"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestCzechNationalBankDataSource_EmptyRate(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("01 Apr 2021 #64\n"+
+		"Country|Currency|Amount|Code|Rate\n"+
+		"USA|dollar|1|USD|\n"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestCzechNationalBankDataSource_InvalidRate(t *testing.T) {
+	dataSource := &CzechNationalBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("01 Apr 2021 #64\n"+
+		"Country|Currency|Amount|Code|Rate\n"+
+		"USA|dollar|1|USD|null\n"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
diff --git a/pkg/exchangerates/euro_central_bank_datasource_test.go b/pkg/exchangerates/euro_central_bank_datasource_test.go
new file mode 100644
index 00000000..9abe84da
--- /dev/null
+++ b/pkg/exchangerates/euro_central_bank_datasource_test.go
@@ -0,0 +1,150 @@
+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 euroCentralBankMinimumRequiredContent = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
+	"<gesmes:Envelope xmlns:gesmes=\"http://www.gesmes.org/xml/2002-08-01\" xmlns=\"http://www.ecb.int/vocabulary/2002-08-01/eurofxref\">\n" +
+	"  <Cube>\n" +
+	"    <Cube time=\"2021-04-01\">\n" +
+	"      <Cube currency=\"USD\" rate=\"1.1746\" />\n" +
+	"      <Cube currency=\"CNY\" rate=\"7.7195\" />\n" +
+	"    </Cube>\n" +
+	"  </Cube>\n" +
+	"</gesmes:Envelope>"
+
+func TestEuroCentralBankDataSource_StandardDataExtractBaseCurrency(t *testing.T) {
+	dataSource := &EuroCentralBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(euroCentralBankMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Equal(t, "EUR", actualLatestExchangeRateResponse.BaseCurrency)
+}
+
+func TestEuroCentralBankDataSource_StandardDataExtractExchangeRates(t *testing.T) {
+	dataSource := &EuroCentralBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(euroCentralBankMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "USD",
+		Rate: "1.1746",
+	})
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "CNY",
+		Rate: "7.7195",
+	})
+}
+
+func TestEuroCentralBankDataSource_BlankContent(t *testing.T) {
+	dataSource := &EuroCentralBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte(""))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestEuroCentralBankDataSource_OnlyXMLHeader(t *testing.T) {
+	dataSource := &EuroCentralBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestEuroCentralBankDataSource_EmptyEnvelopeContent(t *testing.T) {
+	dataSource := &EuroCentralBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
+		"<gesmes:Envelope xmlns:gesmes=\"http://www.gesmes.org/xml/2002-08-01\" xmlns=\"http://www.ecb.int/vocabulary/2002-08-01/eurofxref\">" +
+		"</gesmes:Envelope>"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestEuroCentralBankDataSource_EmptyCubeContent(t *testing.T) {
+	dataSource := &EuroCentralBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
+		"<gesmes:Envelope xmlns:gesmes=\"http://www.gesmes.org/xml/2002-08-01\" xmlns=\"http://www.ecb.int/vocabulary/2002-08-01/eurofxref\">" +
+		"<Cube>" +
+		"</Cube>" +
+		"</gesmes:Envelope>"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestEuroCentralBankDataSource_InvalidCurrency(t *testing.T) {
+	dataSource := &EuroCentralBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
+		"<gesmes:Envelope xmlns:gesmes=\"http://www.gesmes.org/xml/2002-08-01\" xmlns=\"http://www.ecb.int/vocabulary/2002-08-01/eurofxref\">" +
+		"<Cube>" +
+		"<Cube time=\"2021-04-01\">" +
+		"<Cube currency=\"XXX\" rate=\"1\" />" +
+		"</Cube>" +
+		"</Cube>" +
+		"</gesmes:Envelope>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestEuroCentralBankDataSource_EmptyRate(t *testing.T) {
+	dataSource := &EuroCentralBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
+		"<gesmes:Envelope xmlns:gesmes=\"http://www.gesmes.org/xml/2002-08-01\" xmlns=\"http://www.ecb.int/vocabulary/2002-08-01/eurofxref\">" +
+		"<Cube>" +
+		"<Cube time=\"2021-04-01\">" +
+		"<Cube currency=\"USD\" rate=\"\" />" +
+		"</Cube>" +
+		"</Cube>" +
+		"</gesmes:Envelope>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestEuroCentralBankDataSource_InvalidRate(t *testing.T) {
+	dataSource := &EuroCentralBankDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
+		"<gesmes:Envelope xmlns:gesmes=\"http://www.gesmes.org/xml/2002-08-01\" xmlns=\"http://www.ecb.int/vocabulary/2002-08-01/eurofxref\">" +
+		"<Cube>" +
+		"<Cube time=\"2021-04-01\">" +
+		"<Cube currency=\"USD\" rate=\"null\" />" +
+		"</Cube>" +
+		"</Cube>" +
+		"</gesmes:Envelope>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
diff --git a/pkg/exchangerates/national_bank_of_poland_datasource_test.go b/pkg/exchangerates/national_bank_of_poland_datasource_test.go
new file mode 100644
index 00000000..776fdda4
--- /dev/null
+++ b/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)
+}
diff --git a/pkg/exchangerates/reserve_bank_of_australia_datasource_test.go b/pkg/exchangerates/reserve_bank_of_australia_datasource_test.go
new file mode 100644
index 00000000..96cb7132
--- /dev/null
+++ b/pkg/exchangerates/reserve_bank_of_australia_datasource_test.go
@@ -0,0 +1,284 @@
+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 reserveBankOfAustraliaMinimumRequiredContent = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
+	"<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:rba=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html\" xmlns:cb=\"http://www.cbwiki.net/wiki/index.php/Specification_1.2/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://purl.org/rss/1.0/\" xsi:schemaLocation=\"http://www.w3.org/1999/02/22-rdf-syntax-ns# rdf.xsd\">\n" +
+	"  <channel rdf:about=\"https://www.rba.gov.au/rss/rss-cb-exchange-rates.xml\">\n" +
+	"    <dc:date>2021-04-01T16:45:00+11:00</dc:date>\n" +
+	"  </channel>\n" +
+	"  <item rdf:about=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html#USD\">\n" +
+	"    <cb:statistics rdf:parseType=\"Resource\">\n" +
+	"      <cb:exchangeRate rdf:parseType=\"Resource\">\n" +
+	"        <cb:observation rdf:parseType=\"Resource\">\n" +
+	"          <cb:value>0.7543</cb:value>\n" +
+	"          <cb:unit>AUD</cb:unit>\n" +
+	"        </cb:observation>\n" +
+	"        <cb:baseCurrency>AUD</cb:baseCurrency>\n" +
+	"        <cb:targetCurrency>USD</cb:targetCurrency>\n" +
+	"      </cb:exchangeRate>\n" +
+	"    </cb:statistics>\n" +
+	"  </item>\n" +
+	"  <item rdf:about=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html#CNY\">\n" +
+	"    <cb:statistics rdf:parseType=\"Resource\">\n" +
+	"      <cb:exchangeRate rdf:parseType=\"Resource\">\n" +
+	"        <cb:observation rdf:parseType=\"Resource\">\n" +
+	"          <cb:value>4.9577</cb:value>\n" +
+	"          <cb:unit>AUD</cb:unit>\n" +
+	"        </cb:observation>\n" +
+	"        <cb:baseCurrency>AUD</cb:baseCurrency>\n" +
+	"        <cb:targetCurrency>CNY</cb:targetCurrency>\n" +
+	"      </cb:exchangeRate>\n" +
+	"    </cb:statistics>\n" +
+	"  </item>\n" +
+	"</rdf:RDF>"
+
+func TestReserveBankOfAustraliaDataSource_StandardDataExtractBaseCurrency(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(reserveBankOfAustraliaMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Equal(t, "AUD", actualLatestExchangeRateResponse.BaseCurrency)
+}
+
+func TestReserveBankOfAustraliaDataSource_StandardDataExtractExchangeRates(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte(reserveBankOfAustraliaMinimumRequiredContent))
+	assert.Equal(t, nil, err)
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "USD",
+		Rate:     "0.7543",
+	})
+	assert.Contains(t, actualLatestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
+		Currency: "CNY",
+		Rate:     "4.9577",
+	})
+}
+
+func TestReserveBankOfAustraliaDataSource_BlankContent(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte(""))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestReserveBankOfAustraliaDataSource_OnlyXMLHeader(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestReserveBankOfAustraliaDataSource_EmptyRDFContent(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"+
+		"<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:rba=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html\" xmlns:cb=\"http://www.cbwiki.net/wiki/index.php/Specification_1.2/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://purl.org/rss/1.0/\" xsi:schemaLocation=\"http://www.w3.org/1999/02/22-rdf-syntax-ns# rdf.xsd\">\n"+
+		"</rdf:RDF>"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestReserveBankOfAustraliaDataSource_EmptyChannelContent(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"+
+		"<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:rba=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html\" xmlns:cb=\"http://www.cbwiki.net/wiki/index.php/Specification_1.2/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://purl.org/rss/1.0/\" xsi:schemaLocation=\"http://www.w3.org/1999/02/22-rdf-syntax-ns# rdf.xsd\">\n"+
+		"  <channel rdf:about=\"https://www.rba.gov.au/rss/rss-cb-exchange-rates.xml\">\n"+
+		"  </channel>"+
+		"  <item rdf:about=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html#USD\">\n"+
+		"    <cb:statistics rdf:parseType=\"Resource\">\n"+
+		"      <cb:exchangeRate rdf:parseType=\"Resource\">\n"+
+		"        <cb:observation rdf:parseType=\"Resource\">\n"+
+		"          <cb:value>0.7543</cb:value>\n"+
+		"          <cb:unit>AUD</cb:unit>\n"+
+		"        </cb:observation>\n"+
+		"        <cb:baseCurrency>AUD</cb:baseCurrency>\n"+
+		"        <cb:targetCurrency>USD</cb:targetCurrency>\n"+
+		"      </cb:exchangeRate>\n"+
+		"    </cb:statistics>\n"+
+		"  </item>\n"+
+		"</rdf:RDF>"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestReserveBankOfAustraliaDataSource_NoItem(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	_, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"+
+		"<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:rba=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html\" xmlns:cb=\"http://www.cbwiki.net/wiki/index.php/Specification_1.2/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://purl.org/rss/1.0/\" xsi:schemaLocation=\"http://www.w3.org/1999/02/22-rdf-syntax-ns# rdf.xsd\">\n"+
+		"  <channel rdf:about=\"https://www.rba.gov.au/rss/rss-cb-exchange-rates.xml\">\n"+
+		"    <dc:date>2021-04-01T16:45:00+11:00</dc:date>\n"+
+		"  </channel>\n"+
+		"</rdf:RDF>"))
+	assert.NotEqual(t, nil, err)
+}
+
+func TestReserveBankOfAustraliaDataSource_BaseCurrencyNotEqualPreset(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"+
+		"<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:rba=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html\" xmlns:cb=\"http://www.cbwiki.net/wiki/index.php/Specification_1.2/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://purl.org/rss/1.0/\" xsi:schemaLocation=\"http://www.w3.org/1999/02/22-rdf-syntax-ns# rdf.xsd\">\n"+
+		"  <channel rdf:about=\"https://www.rba.gov.au/rss/rss-cb-exchange-rates.xml\">\n"+
+		"    <dc:date>2021-04-01T16:45:00+11:00</dc:date>\n"+
+		"  </channel>\n"+
+		"  <item rdf:about=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html#USD\">\n"+
+		"    <cb:statistics rdf:parseType=\"Resource\">\n"+
+		"      <cb:exchangeRate rdf:parseType=\"Resource\">\n"+
+		"        <cb:observation rdf:parseType=\"Resource\">\n"+
+		"          <cb:value>0.7543</cb:value>\n"+
+		"          <cb:unit>AUD</cb:unit>\n"+
+		"        </cb:observation>\n"+
+		"        <cb:baseCurrency>USD</cb:baseCurrency>\n"+
+		"        <cb:targetCurrency>USD</cb:targetCurrency>\n"+
+		"      </cb:exchangeRate>\n"+
+		"    </cb:statistics>\n"+
+		"  </item>\n"+
+		"</rdf:RDF>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestReserveBankOfAustraliaDataSource_UnitCurrencyNotEqualPreset(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"+
+		"<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:rba=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html\" xmlns:cb=\"http://www.cbwiki.net/wiki/index.php/Specification_1.2/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://purl.org/rss/1.0/\" xsi:schemaLocation=\"http://www.w3.org/1999/02/22-rdf-syntax-ns# rdf.xsd\">\n"+
+		"  <channel rdf:about=\"https://www.rba.gov.au/rss/rss-cb-exchange-rates.xml\">\n"+
+		"    <dc:date>2021-04-01T16:45:00+11:00</dc:date>\n"+
+		"  </channel>\n"+
+		"  <item rdf:about=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html#USD\">\n"+
+		"    <cb:statistics rdf:parseType=\"Resource\">\n"+
+		"      <cb:exchangeRate rdf:parseType=\"Resource\">\n"+
+		"        <cb:observation rdf:parseType=\"Resource\">\n"+
+		"          <cb:value>0.7543</cb:value>\n"+
+		"          <cb:unit>USD</cb:unit>\n"+
+		"        </cb:observation>\n"+
+		"        <cb:baseCurrency>AUD</cb:baseCurrency>\n"+
+		"        <cb:targetCurrency>USD</cb:targetCurrency>\n"+
+		"      </cb:exchangeRate>\n"+
+		"    </cb:statistics>\n"+
+		"  </item>\n"+
+		"</rdf:RDF>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestReserveBankOfAustraliaDataSource_InvalidCurrency(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"+
+		"<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:rba=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html\" xmlns:cb=\"http://www.cbwiki.net/wiki/index.php/Specification_1.2/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://purl.org/rss/1.0/\" xsi:schemaLocation=\"http://www.w3.org/1999/02/22-rdf-syntax-ns# rdf.xsd\">\n"+
+		"  <channel rdf:about=\"https://www.rba.gov.au/rss/rss-cb-exchange-rates.xml\">\n"+
+		"    <dc:date>2021-04-01T16:45:00+11:00</dc:date>\n"+
+		"  </channel>\n"+
+		"  <item rdf:about=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html#USD\">\n"+
+		"    <cb:statistics rdf:parseType=\"Resource\">\n"+
+		"      <cb:exchangeRate rdf:parseType=\"Resource\">\n"+
+		"        <cb:observation rdf:parseType=\"Resource\">\n"+
+		"          <cb:value>1</cb:value>\n"+
+		"          <cb:unit>AUD</cb:unit>\n"+
+		"        </cb:observation>\n"+
+		"        <cb:baseCurrency>AUD</cb:baseCurrency>\n"+
+		"        <cb:targetCurrency>XXX</cb:targetCurrency>\n"+
+		"      </cb:exchangeRate>\n"+
+		"    </cb:statistics>\n"+
+		"  </item>\n"+
+		"</rdf:RDF>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestReserveBankOfAustraliaDataSource_EmptyRate(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"+
+		"<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:rba=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html\" xmlns:cb=\"http://www.cbwiki.net/wiki/index.php/Specification_1.2/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://purl.org/rss/1.0/\" xsi:schemaLocation=\"http://www.w3.org/1999/02/22-rdf-syntax-ns# rdf.xsd\">\n"+
+		"  <channel rdf:about=\"https://www.rba.gov.au/rss/rss-cb-exchange-rates.xml\">\n"+
+		"    <dc:date>2021-04-01T16:45:00+11:00</dc:date>\n"+
+		"  </channel>\n"+
+		"  <item rdf:about=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html#USD\">\n"+
+		"    <cb:statistics rdf:parseType=\"Resource\">\n"+
+		"      <cb:exchangeRate rdf:parseType=\"Resource\">\n"+
+		"        <cb:observation rdf:parseType=\"Resource\">\n"+
+		"          <cb:value></cb:value>\n"+
+		"          <cb:unit>AUD</cb:unit>\n"+
+		"        </cb:observation>\n"+
+		"        <cb:baseCurrency>AUD</cb:baseCurrency>\n"+
+		"        <cb:targetCurrency>USD</cb:targetCurrency>\n"+
+		"      </cb:exchangeRate>\n"+
+		"    </cb:statistics>\n"+
+		"  </item>\n"+
+		"</rdf:RDF>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}
+
+func TestReserveBankOfAustraliaDataSource_InvalidRate(t *testing.T) {
+	dataSource := &ReserveBankOfAustraliaDataSource{}
+	context := &core.Context{
+		Context: &gin.Context{},
+	}
+
+	actualLatestExchangeRateResponse, err := dataSource.Parse(context, []byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"+
+		"<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:rba=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html\" xmlns:cb=\"http://www.cbwiki.net/wiki/index.php/Specification_1.2/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://purl.org/rss/1.0/\" xsi:schemaLocation=\"http://www.w3.org/1999/02/22-rdf-syntax-ns# rdf.xsd\">\n"+
+		"  <channel rdf:about=\"https://www.rba.gov.au/rss/rss-cb-exchange-rates.xml\">\n"+
+		"    <dc:date>2021-04-01T16:45:00+11:00</dc:date>\n"+
+		"  </channel>\n"+
+		"  <item rdf:about=\"https://www.rba.gov.au/statistics/frequency/exchange-rates.html#USD\">\n"+
+		"    <cb:statistics rdf:parseType=\"Resource\">\n"+
+		"      <cb:exchangeRate rdf:parseType=\"Resource\">\n"+
+		"        <cb:observation rdf:parseType=\"Resource\">\n"+
+		"          <cb:value>null</cb:value>\n"+
+		"          <cb:unit>AUD</cb:unit>\n"+
+		"        </cb:observation>\n"+
+		"        <cb:baseCurrency>AUD</cb:baseCurrency>\n"+
+		"        <cb:targetCurrency>USD</cb:targetCurrency>\n"+
+		"      </cb:exchangeRate>\n"+
+		"    </cb:statistics>\n"+
+		"  </item>\n"+
+		"</rdf:RDF>"))
+	assert.Equal(t, nil, err)
+	assert.Len(t, actualLatestExchangeRateResponse.ExchangeRates, 0)
+}