feat: rate not available

rate.go

@@ -33,6 +33,17 @@ type MarketrateResponse struct {
 	ValueDate  Time    `json:"valueDate"`
 }
 
+func MarketrateNotAvailableError(err error) bool {
+	switch e := err.(type) {
+	case UnexpectedResponse:
+		switch e.Status {
+		case http.StatusNotFound, http.StatusBadRequest:
+			return true
+		}
+	}
+	return false
+}
+
 func (c *client) FetchMarketrate(ctx context.Context, params MarketrateParams) (data MarketrateResponse, err error) {
 	req, err := c.newRequest(ctx, http.MethodGet, "/fx/v1/marketrate", nil)
 	if err != nil {

rate_test.go

@@ -17,8 +17,11 @@ import (
 //go:embed testdata/marketrate-success.json
 var marketrateSuccess []byte
 
-//go:embed testdata/marketrate-fail.txt
-var marketrateFail []byte
+//go:embed testdata/marketrate-not-available.txt
+var marketrateNotAvailable []byte
+
+//go:embed testdata/marketrate-outside-trading-hours.txt
+var marketrateOutsideTradingHours []byte
 
 //go:embed testdata/negotiate-success.json
 var negotiateSuccess []byte
@@ -38,6 +41,7 @@ func TestFetchMarketrate(t *testing.T) {
 
 	assert.Equal(t, 1.209602, got.MarketRate)
 	assert.Equal(t, "GBP/USD", got.Symbol)
+	assert.False(t, clearbank.MarketrateNotAvailableError(err))
 }
 
 func TestFetchMarketrate_RequestErr(t *testing.T) {
@@ -49,15 +53,28 @@ func TestFetchMarketrate_RequestErr(t *testing.T) {
 	require.Contains(t, err.Error(), "failed to create request")
 }
 
-func TestFetchMarketrate_Fail(t *testing.T) {
+func TestFetchMarketrate_NotAvailable(t *testing.T) {
+	mockHttpClient := clearbank.NewMockHttpClient(t)
+	client := clearbank.NewClient("token", nil, clearbank.WithHTTPClient(mockHttpClient))
+
+	resp := &http.Response{StatusCode: 404, Body: io.NopCloser(bytes.NewReader(marketrateNotAvailable))}
+	mockHttpClient.On("Do", mock.AnythingOfType("*http.Request")).Return(resp, nil).Once()
+
+	_, err := client.FetchMarketrate(context.TODO(), clearbank.MarketrateParams{FixedSide: clearbank.FixedSideBuy})
+	require.Error(t, err)
+	require.True(t, clearbank.MarketrateNotAvailableError(err))
+}
+
+func TestFetchMarketrate_OutsideTradingHours(t *testing.T) {
 	mockHttpClient := clearbank.NewMockHttpClient(t)
 	client := clearbank.NewClient("token", nil, clearbank.WithHTTPClient(mockHttpClient))
 
-	resp := &http.Response{StatusCode: 200, Body: io.NopCloser(bytes.NewReader(marketrateFail))}
+	resp := &http.Response{StatusCode: 400, Body: io.NopCloser(bytes.NewReader(marketrateOutsideTradingHours))}
 	mockHttpClient.On("Do", mock.AnythingOfType("*http.Request")).Return(resp, nil).Once()
 
 	_, err := client.FetchMarketrate(context.TODO(), clearbank.MarketrateParams{FixedSide: clearbank.FixedSideBuy})
 	require.Error(t, err)
+	require.True(t, clearbank.MarketrateNotAvailableError(err))
 }
 
 func TestNegotiate(t *testing.T) {

testdata/marketrate-outside-trading-hours.txt

@@ -0,0 +1 @@
+FX Quote is for outside stated trading times