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return describe("string interpolation", function()
it("should interpolate in double quotes", function()
local name = "World"
local result = "Hello " .. tostring(name) .. "!"
return assert.same(result, "Hello World!")
end)
it("should interpolate numbers", function()
local a, b = 10, 20
local result = tostring(a) .. " + " .. tostring(b) .. " = " .. tostring(a + b)
return assert.same(result, "10 + 20 = 30")
end)
it("should interpolate expressions", function()
local x = 5
local result = "x * 2 = " .. tostring(x * 2)
return assert.same(result, "x * 2 = 10")
end)
it("should interpolate function calls", function()
local result = "result: " .. tostring(math.floor(5.5))
return assert.same(result, "result: 5")
end)
it("should interpolate in string literals", function()
local x = 100
local result = "Value: " .. tostring(x)
return assert.same(result, "Value: 100")
end)
it("should work with nested interpolation", function()
local inner = "inner"
local result = "Outer: " .. tostring(inner)
return assert.same(result, "Outer: inner")
end)
return it("should not interpolate in single quotes", function()
local name = "World"
local result = 'Hello #{name}!'
return assert.same(result, 'Hello #{name}!')
end)
end)
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