testthat: Unit Testing for R

ユニットテスト

> library(testthat)

バージョン: 1.0.2

関数名	概略
`CheckReporter-class`	Check reporter: 13 line summary of problems
`ListReporter-class`	List reporter: gather all test results along with elapsed time and file information.
`MinimalReporter-class`	Test reporter: minimal.
`MultiReporter-class`	Multi reporter: combine several reporters in one.
`Reporter-class`	Stub object for managing a reporter of tests.
`RstudioReporter-class`	Test reporter: RStudio
`SilentReporter-class`	Test reporter: gather all errors silently.
`StopReporter-class`	Test reporter: stop on error.
`SummaryReporter-class`	Test reporter: summary of errors.
`TapReporter-class`	Test reporter: TAP format.
`TeamcityReporter-class`	Test reporter: Teamcity format.
`auto_test`	Watches code and tests for changes, rerunning tests as appropriate.
`auto_test_package`	Watches a package for changes, rerunning tests as appropriate.
`compare`	Provide human-readable comparison of two objects
`context`	Describe the context of a set of tests.
`describe`	describe: a BDD testing language
`equivalence`	Expectation: is the object equal to a value?
`evaluate_promise`	Evaluate a promise, capturing all types of output.
`expect-compare`	Expectation: is returned value less or greater than specified value?
`expect_equal_to_reference`	Expectation: is the object equal to a reference value stored in a file?
`expect_is`	Expectation: does the object inherit from a class?
`expect_named`	Expectation: does object have names?
`expect_null`	Expectation: is the object NULL?
`expect_true`	Expectation: is the object true/false?
`fail`	A default expectation that always fails.
`make_expectation`	Make an equality test.
`matching-expectations`	Expectation: does string/output/warning/error match a regular expression?
`not`	Negate an expectation
`setup_test_dir`	Take care or finding the test files and sourcing the helpers.
`skip`	Skip a test.
`succeed`	A default expectation that always succeeds.
`test_dir`	Run all of the tests in a directory.
`test_examples`	Test package examples
`test_file`	Run all tests in specified file.
`test_package`	Run all tests in an installed package
`test_that`	Create a test.
`testthat`	R package to make testing fun!
`testthat_results`	Create a 'testthat_results' object from the
`test`	results as stored in the ListReporter results field.
`watch`	Watch a directory for changes (additions, deletions & modifications).
`with_mock`	Mock functions in a package.

compare

オブジェクトの比較

> x <- c("abc", "def", "jih")
> compare(x, x)

Error: All inputs should have class 'loo'.

> y <- paste0(x, "y")
> compare(x, y)

Error: All inputs should have class 'loo'.

> x <- y <- runif(100)
> y[sample(100, 10)] <- 5
> compare(x, y)

Error: All inputs should have class 'loo'.

test_file

テストファイルの実行

Arguments

path
reporter
env
start_end_reporter

> test_file(path, reporter = "summary", env = test_env(),
+   start_end_reporter = TRUE)

expect_null / except_type / expect_is / expect_s3_class / expect_s4_class

> expect_is(1, "numeric")
> # expect_is(1L, "numeric"))
> expect_is(1L, "integer")
> 
> expect_true(TRUE)
> expect_false(FALSE)

with_moch

> with_mock(
+   all.equal = function(x, y, ...) TRUE,
+   expect_equal(2 * 3, 4),
+   .env = "base"
+ )

[1] 6