From f6be0786a0898ff6ed54df3649ed9193c06ef966 Mon Sep 17 00:00:00 2001
From: Diego Stratta <dbstratta@gmail.com>
Date: Fri, 13 Aug 2021 19:24:04 -0300
Subject: [PATCH] Implement `From<MaybeUndefined<T>> for Option<Option<T>>`

---
 src/types/maybe_undefined.rs | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/types/maybe_undefined.rs b/src/types/maybe_undefined.rs
index 69693b50..81a6048f 100644
--- a/src/types/maybe_undefined.rs
+++ b/src/types/maybe_undefined.rs
@@ -156,6 +156,16 @@ where
     }
 }
 
+impl<T> From<MaybeUndefined<T>> for Option<Option<T>> {
+    fn from(maybe_undefined: MaybeUndefined<T>) -> Self {
+        match maybe_undefined {
+            MaybeUndefined::Undefined => None,
+            MaybeUndefined::Null => Some(None),
+            MaybeUndefined::Value(value) => Some(Some(value)),
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use crate::*;
@@ -235,4 +245,19 @@ mod tests {
             }
         );
     }
+
+    #[test]
+    fn test_maybe_undefined_to_nested_option() {
+        assert_eq!(Option::<Option<i32>>::from(MaybeUndefined::Undefined), None);
+
+        assert_eq!(
+            Option::<Option<i32>>::from(MaybeUndefined::Null),
+            Some(None)
+        );
+
+        assert_eq!(
+            Option::<Option<i32>>::from(MaybeUndefined::Value(42)),
+            Some(Some(42))
+        );
+    }
 }