1 local template = [[

     2 {greet!}, {name?world}!

     3 ]];

     4 local expect1 = [[

     5 Hello, WORLD!

     6 ]];

     7 local expect2 = [[

     8 Hello, world!

     9 ]];

    10 

    11 describe("util.interpolation", function ()

    12 	it("renders", function ()

    13 		local render = require "util.interpolation".new("%b{}", string.upper);

    14 		assert.equal(expect1, render(template, { greet = "Hello", name = "world" }));

    15 		assert.equal(expect2, render(template, { greet = "Hello" }));

    16 	end);

    17 end);