feat: add expr module (#775)

This is (soon) to be used when installing package definitions from
https://github.com/mason-org/mason-registry/. See for example:
https://github.com/mason-org/mason-registry/blob/7df69dd2a73efc3a08520552ca64597d1db5f4fb/packages/go-debug-adapter/package.yaml#L16

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/mason-core/result_spec.lua b/tests/mason-core/result_spec.lua
index 1d8f36fb..d7d629f5 100644
--- a/tests/mason-core/result_spec.lua
+++ b/tests/mason-core/result_spec.lua
@@ -195,4 +195,20 @@ describe("result", function()
         assert.equals("Error", failure:get_or_nil())
         assert.spy(chain).was_not_called()
     end)
+
+    it("should pcall", function()
+        assert.same(
+            Result.success "Great success!",
+            Result.pcall(function()
+                return "Great success!"
+            end)
+        )
+
+        assert.same(
+            Result.failure "Task failed successfully!",
+            Result.pcall(function()
+                error("Task failed successfully!", 0)
+            end)
+        )
+    end)
 end)