test(settings): Test callbacks in push/pop scenarios

core/settings_spec.lua

@@ -17,4 +17,26 @@ describe("The settings handler", function()
     assert.is.equal("baz hooked", private)
   end)
 
+  it("should trigger callbacks on push/pop events", function()
+    local mystate = "foo"
+    local function callback2 (value)
+       mystate = value .. " stack"
+    end
+    SILE.settings:declare({
+       parameter = "test.callback2",
+       type = "string",
+       default = "bar",
+       hook = callback2
+    })
+    SILE.settings:pushState()
+    SILE.settings:set("test.callback2", "baz1")
+    SILE.settings:pushState()
+    SILE.settings:set("test.callback2", "baz2")
+    assert.is.equal("baz2 stack", mystate)
+    SILE.settings:popState()
+    assert.is.equal("baz1 stack", mystate)
+    SILE.settings:popState()
+    assert.is.equal("bar stack", mystate)
+  end)
+
 end)