tests/testthat/test-golem-recommended.R

In KasperSkytte/KaspbeeryPi: KaspbeeryPi

test_that("app ui", {
  ui <- app_ui()
  golem::expect_shinytaglist(ui)
  # Check that formals have not been removed
  fmls <- formals(app_ui)
  for (i in c("request")) {
    expect_true(i %in% names(fmls))
  }
})

test_that("app server", {
  server <- app_server
  expect_type(server, "closure")
  # Check that formals have not been removed
  fmls <- formals(app_server)
  for (i in c("input", "output", "session")) {
    expect_true(i %in% names(fmls))
  }
})

# Configure this test to fit your need.
# testServer() function makes it possible to test code in server functions and modules, without needing to run the full Shiny application
testServer(app_server, {

  # Set and test an input
  session$setInputs(x = 2)
  expect_equal(input$x, 2)

  # Example of tests you can do on the server:
  # - Checking reactiveValues
  # expect_equal(r$lg, 'EN')
  # - Checking output
  # expect_equal(output$txt, "Text")
})

# Configure this test to fit your need
test_that(
  "app launches",
  {
    golem::expect_running(sleep = 5)
  }
)