feat: method to check if Quantity is empty

src/types/mod.rs

@@ -1 +1,5 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
 pub mod quantity;

src/types/quantity.rs

@@ -54,6 +54,12 @@ pub struct QuantityPart {
     unit: QuantityUnit,
 }
 
+impl QuantityPart {
+    pub fn is_empty(&self) -> bool {
+        self.number == 0
+    }
+}
+
 #[derive(
     Clone, Default, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd, Builder, Getters,
 )]
@@ -62,10 +68,78 @@ pub struct Quantity {
     major: QuantityPart,
 }
 
+impl Quantity {
+    pub fn is_empty(&self) -> bool {
+        self.minor.is_empty() == true && self.major.is_empty() == true
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
 
+    #[test]
+    fn quantity_part_empty() {
+        let q = QuantityPartBuilder::default()
+            .number(0)
+            .unit(QuantityUnit::DiscreteNumber)
+            .build()
+            .unwrap();
+        assert!(q.is_empty());
+        let q_not_empty = QuantityPartBuilder::default()
+            .number(1)
+            .unit(QuantityUnit::DiscreteNumber)
+            .build()
+            .unwrap();
+        assert!(!q_not_empty.is_empty());
+    }
+
+    #[test]
+    fn quantity_empty() {
+        let q = QuantityPartBuilder::default()
+            .number(0)
+            .unit(QuantityUnit::DiscreteNumber)
+            .build()
+            .unwrap();
+        let q_not_empty = QuantityPartBuilder::default()
+            .number(1)
+            .unit(QuantityUnit::DiscreteNumber)
+            .build()
+            .unwrap();
+
+        // not empty; major has items
+        assert!(!QuantityBuilder::default()
+            .minor(q.clone())
+            .major(q_not_empty.clone())
+            .build()
+            .unwrap()
+            .is_empty());
+
+        // not empty; minor has items
+        assert!(!QuantityBuilder::default()
+            .minor(q.clone())
+            .major(q_not_empty.clone())
+            .build()
+            .unwrap()
+            .is_empty());
+
+        // not empty; minor & major have items
+        assert!(!QuantityBuilder::default()
+            .minor(q_not_empty.clone())
+            .major(q_not_empty.clone())
+            .build()
+            .unwrap()
+            .is_empty());
+
+        // empty
+        assert!(QuantityBuilder::default()
+            .minor(q.clone())
+            .major(q)
+            .build()
+            .unwrap()
+            .is_empty());
+    }
+
     fn test_helper<T>(t: T, str_value: &str) -> bool
     where
         T: ToString + FromStr + std::fmt::Debug + PartialEq,
@@ -105,4 +179,20 @@ mod tests {
     fn quantity_unit_liter() {
         assert!(test_helper(QuantityUnit::Liter, LITER));
     }
+
+    impl Quantity {
+        pub fn get_quantity() -> Self {
+            let q = QuantityPartBuilder::default()
+                .number(1)
+                .unit(QuantityUnit::DiscreteNumber)
+                .build()
+                .unwrap();
+
+            QuantityBuilder::default()
+                .minor(q.clone())
+                .major(q.clone())
+                .build()
+                .unwrap()
+        }
+    }
 }