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local system = require("system")
describe("Random:", function()
describe("random()", function()
it("should return random bytes for a valid number of bytes", function()
local num_bytes = 1
local result, err_msg = system.random(num_bytes)
assert.is_nil(err_msg)
assert.is.string(result)
assert.is_equal(num_bytes, #result)
end)
it("should return an empty string for 0 bytes", function()
local num_bytes = 0
local result, err_msg = system.random(num_bytes)
assert.is_nil(err_msg)
assert.are.equal("", result)
end)
it("should return an error message for an invalid number of bytes", function()
local num_bytes = -1
local result, err_msg = system.random(num_bytes)
assert.is.falsy(result)
assert.are.equal("invalid number of bytes, must not be less than 0", err_msg)
end)
it("should not return duplicate results", function()
local num_bytes = 1025
local result1, err_msg = system.random(num_bytes)
assert.is_nil(err_msg)
assert.is.string(result1)
local result2, err_msg = system.random(num_bytes)
assert.is_nil(err_msg)
assert.is.string(result2)
assert.is_not.equal(result1, result2)
end)
end)
end)
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