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util.events: Add set_debug_hook() method

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Hook signature:

  ret = debug_hook(handler, event_name, event_data)
This commit is contained in:
Matthew Wild 2020-09-03 12:59:43 +01:00
parent 1cec114646
commit c909bca762
2 changed files with 57 additions and 1 deletions
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38
spec/util_events_spec.lua
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@ -208,5 +208,43 @@ describe("util.events", function ()
assert.spy(h).was_called(2);
end);
end);
describe("debug hooks", function ()
it("should get called", function ()
local d = spy.new(function (handler, event_name, event_data)
return handler(event_data);
end);
e.add_handler("myevent", h);
e.fire_event("myevent");
assert.spy(h).was_called(1);
assert.spy(d).was_called(0);
assert.is_nil(e.set_debug_hook(d));
e.fire_event("myevent", { mydata = true });
assert.spy(h).was_called(2);
assert.spy(d).was_called(1);
assert.spy(d).was_called_with(h, "myevent", { mydata = true });
assert.equal(d, e.set_debug_hook(nil));
e.fire_event("myevent", { mydata = false });
assert.spy(h).was_called(3);
assert.spy(d).was_called(1);
end);
it("setting should return any existing debug hook", function ()
local function f() end
local function g() end
assert.is_nil(e.set_debug_hook(f));
assert.is_equal(f, e.set_debug_hook(g));
assert.is_equal(g, e.set_debug_hook(f));
assert.is_equal(f, e.set_debug_hook(nil));
assert.is_nil(e.set_debug_hook(f));
end);
end);
end);
end);