sile 0.15.11

Simon’s Improved Layout Engine
Documentation 
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SILE = require("core.sile")

describe("The settings handler", function ()
   it("should trigger callbacks on set", function ()
      local private = "foo"
      local function callback (value)
         private = value .. " hooked"
      end
      SILE.settings:declare({
         parameter = "test.callback",
         type = "string",
         default = "bar",
         hook = callback,
      })
      SILE.settings:set("test.callback", "baz")
      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)