Add support for Z time zone and fractional seconds in date formats (#97)

* Add support for Z time zone and fractional seconds in date formats and reduce repitition in tests

juniper/src/integrations/chrono.rs

@@ -18,7 +18,8 @@ use chrono::prelude::*;
 use ::Value;
 
 #[doc(hidden)]
-pub static RFC3339_FORMAT: &'static str = "%Y-%m-%dT%H:%M:%S%z";
+pub static RFC3339_FORMAT: &'static str = "%Y-%m-%dT%H:%M:%S%.f%:z";
+static RFC3339_PARSE_FORMAT: &'static str = "%+";
 
 graphql_scalar!(DateTime<FixedOffset> as "DateTimeFixedOffset" {
     description: "DateTime"
@@ -60,7 +61,7 @@ graphql_scalar!(NaiveDate {
 
     from_input_value(v: &InputValue) -> Option<NaiveDate> {
         v.as_string_value()
-         .and_then(|s| NaiveDate::parse_from_str(s, RFC3339_FORMAT).ok())
+         .and_then(|s| NaiveDate::parse_from_str(s, RFC3339_PARSE_FORMAT).ok())
     }
 });
 
@@ -82,11 +83,9 @@ graphql_scalar!(NaiveDateTime {
 #[cfg(test)]
 mod test {
     use chrono::prelude::*;
-    use super::RFC3339_FORMAT;
+    use super::RFC3339_PARSE_FORMAT;
 
-    #[test]
-    fn datetime_fixedoffset_from_input_value() {
-        let raw = "2014-11-28T21:00:09+09:00";
+    fn datetime_fixedoffset_test(raw: &'static str) {
         let input = ::InputValue::String(raw.to_string());
 
         let parsed: DateTime<FixedOffset> = ::FromInputValue::from_input_value(&input).unwrap();
@@ -96,8 +95,21 @@ mod test {
     }
 
     #[test]
-    fn datetime_utc_from_input_value() {
-        let raw = "2014-11-28T21:00:09+09:00";
+    fn datetime_fixedoffset_from_input_value() {
+        datetime_fixedoffset_test("2014-11-28T21:00:09+09:00");
+    }
+
+    #[test]
+    fn datetime_fixedoffset_from_input_value_with_z_timezone() {
+        datetime_fixedoffset_test("2014-11-28T21:00:09Z");
+    }
+
+    #[test]
+    fn datetime_fixedoffset_from_input_value_with_fractional_seconds() {
+        datetime_fixedoffset_test("2014-11-28T21:00:09.05+09:00");
+    }
+
+    fn datetime_utc_test(raw: &'static str) {
         let input = ::InputValue::String(raw.to_string());
 
         let parsed: DateTime<Utc> = ::FromInputValue::from_input_value(&input).unwrap();
@@ -107,22 +119,53 @@ mod test {
     }
 
     #[test]
-    fn naivedate_from_input_value() {
-        let raw = "1996-12-19T16:39:57-08:00";
+    fn datetime_utc_from_input_value() {
+        datetime_utc_test("2014-11-28T21:00:09+09:00")
+    }
+
+    #[test]
+    fn datetime_utc_from_input_value_with_z_timezone() {
+        datetime_utc_test("2014-11-28T21:00:09Z")
+    }
+
+    #[test]
+    fn datetime_utc_from_input_value_with_fractional_seconds() {
+        datetime_utc_test("2014-11-28T21:00:09.005+09:00");
+    }
+
+    fn naivedate_test(raw: &'static str, y: i32, m: u32, d: u32) {
         let input = ::InputValue::String(raw.to_string());
 
         let parsed: NaiveDate = ::FromInputValue::from_input_value(&input).unwrap();
-        let expected = NaiveDate::parse_from_str(raw, &RFC3339_FORMAT).unwrap();
-        let expected_via_datetime = DateTime::parse_from_rfc3339(raw).unwrap().date().naive_utc();
-        let expected_via_ymd = NaiveDate::from_ymd(1996, 12, 19);
+        let expected = NaiveDate::parse_from_str(raw, &RFC3339_PARSE_FORMAT).unwrap();
+        let expected_via_datetime = DateTime::parse_from_rfc3339(raw)
+            .unwrap()
+            .date()
+            .naive_utc();
+        let expected_via_ymd = NaiveDate::from_ymd(y, m, d);
 
         assert_eq!(parsed, expected);
         assert_eq!(parsed, expected_via_datetime);
         assert_eq!(parsed, expected_via_ymd);
 
-        assert_eq!(parsed.year(), 1996);
-        assert_eq!(parsed.month(), 12);
-        assert_eq!(parsed.day(), 19);
+        assert_eq!(parsed.year(), y);
+        assert_eq!(parsed.month(), m);
+        assert_eq!(parsed.day(), d);
+    }
+
+    #[test]
+    fn naivedate_from_input_value() {
+        naivedate_test("1996-12-19T16:39:57-08:00", 1996, 12, 19);
+    }
+
+    #[test]
+    fn naivedate_from_input_value_with_fractional_seconds() {
+        naivedate_test("1996-12-19T16:39:57.005-08:00", 1996, 12, 19);
+    }
+
+    #[test]
+    fn naivedate_from_input_value_with_z_timezone() {
+        naivedate_test("1996-12-19T16:39:57Z", 1996, 12, 19);
     }
 
     #[test]
@@ -135,6 +178,5 @@ mod test {
 
         assert_eq!(parsed, expected);
         assert_eq!(raw, expected.timestamp() as f64);
-
     }
 }

juniper/src/integrations/mod.rs

@@ -1,3 +1,4 @@
+//! Provides GraphQLType implementations for some external types
 #[doc(hidden)]
 pub mod serde;