some fixes

src/invoice.rs

@@ -10,6 +10,7 @@ use crate::common::*;
 use crate::errors::{PaypalError, ResponseError};
 use crate::HeaderParams;
 use bytes::Bytes;
+use chrono::NaiveDate;
 use serde::{Deserialize, Serialize};
 use serde_with::skip_serializing_none;
 use std::collections::HashMap;
@@ -59,7 +60,7 @@ pub struct PaymentTerm {
     /// The payment term. Payment can be due upon receipt, a specified date, or in a set number of days
     pub term_type: PaymentTermType,
     /// The date when the invoice payment is due,
-    pub due_date: Option<chrono::DateTime<chrono::Utc>>,
+    pub due_date: Option<chrono::NaiveDate>,
 }
 
 /// Flow type
@@ -124,9 +125,9 @@ pub struct InvoiceDetail {
     /// The invoice number. Default is the number that is auto-incremented number from the last number.
     pub invoice_number: String,
     /// The invoice date as specificed by the sender
-    pub invoice_date: chrono::DateTime<chrono::Utc>,
+    pub invoice_date: chrono::NaiveDate,
     /// The payment due date for the invoice.
-    pub payment_term: PaymentTerm,
+    pub payment_term: Option<PaymentTerm>,
     /// The audit metadata
     pub metadata: Metadata,
 }
@@ -556,9 +557,9 @@ pub struct Invoice {
     /// The details of the invoice. Includes the invoice number, date, payment terms, and audit metadata.
     pub detail: InvoiceDetail,
     /// The invoicer information. Includes the business name, email, address, phone, fax, tax ID, additional notes, and logo URL.
-    pub invoicer: InvoicerInfo,
+    pub invoicer: Option<InvoicerInfo>,
     /// The billing and shipping information. Includes name, email, address, phone and language.
-    pub primary_recipients: Vec<RecipientInfo>,
+    pub primary_recipients: Option<Vec<RecipientInfo>>,
     /// An array of one or more CC: emails to which notifications are sent.
     /// If you omit this parameter, a notification is sent to all CC: email addresses that are part of the invoice.
     pub additional_recipients: Option<Vec<String>>,
@@ -887,3 +888,27 @@ impl super::Client {
 
     // TODO: https://developer.paypal.com/docs/api/invoicing/v2/#invoices_payments-delete
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::{invoice::*, Client, HeaderParams};
+
+    async fn create_client() -> Client {
+        dotenv::dotenv().ok();
+        let clientid = std::env::var("PAYPAL_CLIENTID").unwrap();
+        let secret = std::env::var("PAYPAL_SECRET").unwrap();
+
+        let client = Client::new(clientid, secret, true);
+
+        client
+    }
+
+    #[tokio::test]
+    async fn test_invoice() {
+        let mut client = create_client().await;
+
+        let list = client.list_invoices(1, 10, HeaderParams::default()).await.unwrap();
+
+        println!("{:?}", list);
+    }
+}

src/lib.rs

@@ -40,10 +40,7 @@
 //!     let order = client
 //!         .create_order(
 //!             order_payload,
-//!             HeaderParams {
-//!                 prefer: Some(Prefer::Representation),
-//!                 ..Default::default()
-//!             },
+//!             HeaderParams::default(),
 //!         )
 //!         .await
 //!         .unwrap();
@@ -192,7 +189,7 @@ pub enum Prefer {
 
 impl Default for Prefer {
     fn default() -> Self {
-        Prefer::Minimal
+        Prefer::Representation
     }
 }
 
@@ -214,7 +211,7 @@ pub struct HeaderParams {
     /// You can retry calls that fail with network timeouts or the HTTP 500 status code. You can retry calls for as long as the server stores the ID.
     pub request_id: Option<String>,
     /// The preferred server response upon successful completion of the request.
-    pub prefer: Option<Prefer>,
+    pub prefer: Prefer,
     /// The media type. Required for operations with a request body.
     pub content_type: Option<String>,
 }
@@ -318,12 +315,10 @@ impl Client {
             headers.append("PayPal-Request-Id", request_id.parse().unwrap());
         }
 
-        if let Some(prefer) = header_params.prefer {
-            match prefer {
-                Prefer::Minimal => headers.append("Prefer", "return=minimal".parse().unwrap()),
-                Prefer::Representation => headers.append("Prefer", "return=representation".parse().unwrap()),
-            };
-        }
+        match header_params.prefer {
+            Prefer::Minimal => headers.append("Prefer", "return=minimal".parse().unwrap()),
+            Prefer::Representation => headers.append("Prefer", "return=representation".parse().unwrap()),
+        };
 
         if let Some(content_type) = header_params.content_type {
             headers.append(header::CONTENT_TYPE, content_type.parse().unwrap());
@@ -409,7 +404,6 @@ mod tests {
             .create_order(
                 order,
                 HeaderParams {
-                    prefer: Some(Prefer::Representation),
                     request_id: Some(ref_id.clone()),
                     ..Default::default()
                 },