1 files changed, 30 insertions, 0 deletions

diff --git a/unit_tests/scripts/_utils54.lua b/unit_tests/scripts/_utils54.lua
new file mode 100644
index 0000000..a511563
--- /dev/null
+++ b/unit_tests/scripts/_utils54.lua
@@ -0,0 +1,30 @@
+local utils = require "_utils"
+
+-- expand _utils module with Lua5.4 specific stuff
+
+-- a lane body that yields stuff
+utils.yielder_with_to_be_closed = function(out_linda_, wait_)
+        local fixture = assert(require "fixture")
+        -- here is a to-be-closed variable that, when closed, sends "Closed!" in the "out" slot of the provided linda
+        local t <close> = setmetatable(
+                { text = "Closed!" }, {
+                        __close = function(self, err)
+                                if wait_ then
+                                        fixture.block_for(wait_)
+                                end
+                                out_linda_:send("out", self.text)
+                        end
+                }
+        )
+        -- yield forever, but be cancel-friendly
+        local n = 1
+        while true do
+                coroutine.yield("I yield!", n)
+                if cancel_test and cancel_test() then -- cancel_test does not exist when run immediately (not in a Lane)
+                        return "I am cancelled"
+                end
+                n = n + 1
+        end
+end
+
+return utils