Add create billing agreement from token (#204)

* Add create billing agreement from token

billing_agreements.go

@@ -40,3 +40,31 @@ func (c *Client) CreateBillingAgreementToken(
 
 	return billingAgreementToken, nil
 }
+
+// CreateBillingAgreementFromToken - Use this call to create a billing agreement
+// Endpoint: POST /v1/billing-agreements/agreements
+func (c *Client) CreateBillingAgreementFromToken(
+	ctx context.Context,
+	tokenID string,
+) (*BillingAgreement, error) {
+	type createBARequest struct {
+		TokenID string `json:"token_id"`
+	}
+
+	billingAgreement := &BillingAgreement{}
+
+	req, err := c.NewRequest(
+		ctx,
+		"POST",
+		fmt.Sprintf("%s%s", c.APIBase, "/v1/billing-agreements/agreements"),
+		createBARequest{TokenID: tokenID})
+	if err != nil {
+		return nil, err
+	}
+
+	if err = c.SendWithAuth(req, billingAgreement); err != nil {
+		return billingAgreement, err
+	}
+
+	return billingAgreement, nil
+}

unit_test.go

@@ -397,6 +397,11 @@ func (ts *webprofileTestServer) ServeHTTP(w http.ResponseWriter, r *http.Request
 			ts.create(w, r)
 		}
 	}
+	if r.RequestURI == "/v1/billing-agreements/agreements" {
+		if r.Method == "POST" {
+			ts.createWithoutName(w, r)
+		}
+	}
 }
 
 func (ts *webprofileTestServer) create(w http.ResponseWriter, r *http.Request) {
@@ -435,6 +440,34 @@ func (ts *webprofileTestServer) create(w http.ResponseWriter, r *http.Request) {
 	w.Write(res)
 }
 
+func (ts *webprofileTestServer) createWithoutName(w http.ResponseWriter, r *http.Request) {
+	var data map[string]interface{}
+
+	body, err := ioutil.ReadAll(r.Body)
+
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+
+	err = json.Unmarshal(body, &data)
+
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+
+	var raw map[string]string
+
+	w.Header().Set("Content-Type", "application/json")
+
+	raw = map[string]string{
+		"id": "B-12345678901234567",
+	}
+	w.WriteHeader(http.StatusCreated)
+
+	res, _ := json.Marshal(raw)
+	w.Write(res)
+}
+
 func (ts *webprofileTestServer) updatevalid(w http.ResponseWriter, r *http.Request) {
 	var data map[string]interface{}
 
@@ -769,4 +802,18 @@ func TestCreateBillingAgreementToken(t *testing.T) {
 		t.Fatal(err)
 	}
 
+}
+
+func TestCreateBillingAgreementFromToken(t *testing.T) {
+
+	ts := httptest.NewServer(&webprofileTestServer{t: t})
+	defer ts.Close()
+
+	c, _ := NewClient("foo", "bar", ts.URL)
+
+	_, err := c.CreateBillingAgreementFromToken(context.Background(),"BillingAgreementToken")
+
+	if err != nil {
+		t.Fatal(err)
+	}
 }