tests

Package tests

Support for writing lua tests like go tests; any function starting with Test will be run.

Example go code

func TestApi(t *testing.T) {
preload := tests.SeveralPreloadFuncs(
inspect.Preload,
strings.Preload,
)
assert.NotZero(t, tests.RunLuaTestFile(t, preload, "./test/test_api.lua"))
}

Example lua code

function TestFoo(t)
    t:Log("foo bar baz")
    assert(someVariable, tostring(someVariable))
    expected = 2
    assert(somethingElse == expected, string.format("%d ~= %d", somethingElse, expected))
end

function TestMaybe(t)
    if os.getenv('SKIP_IT') then
        t:Skip("Skipped because SKIP_IT is defined")
    end
    assert(theActualTest, tostring(theActualTest))
end

Example use of suite

To simulate testify.suite hooks, a simple suite implementation is preloaded as well

local suite = require 'suite'

local MySuite = suite.Suite:new {
    setupCount = 0,
    setupSuiteCount = 0,
    tearDownCount = 0,
    tearDownSuiteCount = 0,
}

function MySuite:SetupSuite()
    self.setupSuiteCount = self.setupSuiteCount + 1
end

function MySuite:TearDownSuite()
    self.tearDownSuiteCount = self.tearDownSuiteCount + 1
end

function MySuite:SetupTest()
    self.setupCount = self.setupCount + 1
end

function MySuite:TearDownTest()
    self.tearDownCount = self.tearDownCount + 1
end

function MySuite:TestFoobar()
    -- T is available from superclass for suites; not passed in as arg
    self:T():Log('TestFoobar')
end

function MySuite:TestBaz()
    self:T():Log('TestBaz')

    self:Run('sub1', function()
        self:T():Log('sub1')
    end)

    self:Run('sub2', function()
        self:T():Log('sub2')
    end)
end

function TestSuite(t)
    -- Same mechanism for test discovery is used, but then the suite is run as sub tests via suite.Run
    assert(suite.Run(t, MySuite), "No tests were run by this Suite")

    -- Called for every test: two tests so should be 2
    assert(MySuite.setupCount == 2, tostring(MySuite.setupCount))
    assert(MySuite.tearDownCount == 2, tostring(MySuite.tearDownCount))

    -- Called only once for the suite so should be 1
    assert(MySuite.setupSuiteCount == 1, tostring(MySuite.setupSuiteCount))
    assert(MySuite.tearDownSuiteCount == 1, tostring(MySuite.tearDownSuiteCount))
end

Example use of assert and require

Similar to testify assert and require, Lua's assert and require can be enhanced to add structured assertions.

local require = require 'require'
local assert = require 'assert'
local inspect = require 'inspect'

function TestAssertions(t)
    local s1 = "foo"
    local s2 = "foo"
    assert:Equal(t, s1, s2)
    assert:Equalf(t, s1, s2, "I really didn't expect them to be equal %d", 123)
    
    local o1 = {
        foo = "bar",
    }
    local o2 = {
        foo = "bar",
    }
    assert:Equal(t, inspect(o1), inspect(o2))
    assert:NotEqual(t, 123, 456, [[wow - they're equal?]])
    
    local err = nil
    assert:NoError(t, err, "I got an error?!?")

    assert:False(t, false, "expected false")
    assert:Falsef(t, false, "expected false for %s", "foobar")
    
    assert:True(t, true, "I wanted the truth")
    
    err = 'foo bar'
    assert:Error(t, err)
end