feat(functional): add list.index_by (#882)

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/mason-core/functional/list_spec.lua b/tests/mason-core/functional/list_spec.lua
index 043f058b..6b2aa2d2 100644
--- a/tests/mason-core/functional/list_spec.lua
+++ b/tests/mason-core/functional/list_spec.lua
@@ -279,6 +279,19 @@ describe("functional: list", function()
             _.split_every(0, {})
         end)
     end)
+
+    it("should index_by lists", function()
+        assert.same(
+            {
+                apple = { fruit = "apple", color = "red" },
+                banana = { fruit = "banana", color = "yellow" },
+            },
+            _.index_by(_.prop "fruit", {
+                { fruit = "apple", color = "red" },
+                { fruit = "banana", color = "yellow" },
+            })
+        )
+    end)
 end)
 
 describe("list immutability", function()