1 files changed, 53 insertions, 0 deletions
diff --git a/cli/src/search.rs b/cli/src/search.rs
index e838271..d140caf 100644
--- a/cli/src/search.rs
+++ b/cli/src/search.rs
@@ -37,6 +37,7 @@ impl DateIsh {
     }
 }
 
+#[derive(Clone)]
 pub enum Comparison {
     Equal,
     Greater,
@@ -61,6 +62,7 @@ fn parse_comparison(s: &str) -> Option<(Decimal, Comparison)> {
     }
 }
 
+#[derive(Clone)]
 pub enum Constraint {
     Category(Category),
     Before(DateIsh),
@@ -98,6 +100,7 @@ impl Constraint {
     }
 }
 
+#[derive(Clone)]
 pub enum Filter {
     Union(Constraint),
     Intersect(Constraint),
@@ -366,4 +369,54 @@ mod test {
             vec![1, 2, 3],
         );
     }
+
+    #[test]
+    fn filters_constraint() {
+        let transactions = vec![
+            Transaction {
+                category: "C1".to_string(),
+                amount: 150.into(),
+                ..transaction(0)
+            },
+            Transaction {
+                category: "C2".to_string(),
+                amount: 150.into(),
+                ..transaction(1)
+            },
+            Transaction {
+                category: "C1".to_string(),
+                amount: 160.into(),
+                ..transaction(2)
+            },
+            Transaction {
+                category: "C2".to_string(),
+                amount: 160.into(),
+                ..transaction(3)
+            },
+        ];
+        let search = Search::new(&transactions);
+
+        let c1 = Constraint::Category("C1".to_string());
+        let amount_150 = Constraint::AmountCompare(150.into(), Comparison::Equal);
+
+        let mut search_filters_1 = search.clone();
+        search_filters_1 = search_filters_1.apply(Filter::Intersect(c1.clone()));
+        search_filters_1 = search_filters_1.apply(Filter::Union(amount_150.clone()));
+        assert_eq!(search_filters_1.get().len(), 3);
+        assert_eq!(
+            search_filters_1.get().iter().map(|t| transaction_id(t)).collect::<Vec<_>>(),
+            vec![0, 1, 2],
+        );
+
+        // Wrap an intersect in a union.
+        let mut search_filters_2 = search.clone();
+        let inner_filters = Constraint::Filters(vec![Filter::Intersect(amount_150)]);
+        search_filters_2 = search_filters_2.apply(Filter::Intersect(c1));
+        search_filters_2 = search_filters_2.apply(Filter::Union(inner_filters));
+        assert_eq!(search_filters_2.get().len(), 3);
+        assert_eq!(
+            search_filters_2.get().iter().map(|t| transaction_id(t)).collect::<Vec<_>>(),
+            vec![0, 1, 2],
+        );
+    }
 }