tests/testthat/test-bookmarking.R

In shiny: Web Application Framework for R

test_that("Inputs and values in query string", {

  restore_context <- function(...) {
    RestoreContext$new(paste0(...))$asList()
  }

  for (input_str in c("_inputs_", "_inputs_=")) {
    for (value_str in c("_values_", "_values_=")) {

      # Normal format
      vals <- restore_context("?", input_str, "&a=1&b=2&", value_str, "&x=3")
      expect_true(contents_identical(vals$input, list(a=1L, b=2L)))
      expect_identical(as.list(vals$values), list(x=3L))

      # No leading '?', trailing '&', and values before inputs
      vals <- restore_context(value_str, "&x=3&", input_str, "&a=1&b=2&")
      expect_true(contents_identical(vals$input, list(a=1L, b=2L)))
      expect_identical(as.list(vals$values), list(x=3L))

      # Just inputs, no values, and leading '&'
      vals <- restore_context("&", input_str, "&a=1&b=2")
      expect_true(contents_identical(vals$input, list(a=1L, b=2L)))
      expect_identical(as.list(vals$values), list())

      # No inputs, just values
      vals <- restore_context("?", value_str, "&x=3")
      expect_identical(vals$input, list())
      expect_identical(as.list(vals$values), list(x=3L))
    }
  }

  # Empty query string
  vals <- RestoreContext$new("")$asList()
  expect_identical(vals$input, list())
  expect_identical(as.list(vals$values), list())

  # Other items (not inputs and not values)
  vals <- RestoreContext$new("?c=3&d=4")$asList()
  expect_identical(vals$input, list())
  expect_identical(as.list(vals$values), list())

  # Multiple instances of _inputs_ or _values_
  suppress_stacktrace(expect_warning(expect_warning(RestoreContext$new("?_inputs_&a=1&_inputs_"))))
  suppress_stacktrace(expect_warning(expect_warning(RestoreContext$new("?_inputs_&a=1&_inputs_&"))))
  suppress_stacktrace(expect_warning(expect_warning(RestoreContext$new("?_inputs_&a=1&_inputs_&b=2"))))
  suppress_stacktrace(expect_warning(expect_warning(RestoreContext$new("?_inputs_&a=1&_values_&b=2&_inputs_&"))))
  suppress_stacktrace(expect_warning(expect_warning(RestoreContext$new("?_values_&a=1&_values_"))))
  suppress_stacktrace(expect_warning(RestoreContext$new("?_inputs_&a=1&_values_&_values&b=2")))

  # If there's an error in the conversion from query string, should have
  # blank values.
  suppress_stacktrace(expect_warning(rc <- RestoreContext$new("?_inputs_&a=[x&b=1")))
  expect_identical(rc$input$asList(), list(b=1L))
  expect_identical(as.list(rc$values), list())
  expect_identical(rc$dir, NULL)

  # Ignore query string if it's a subapp
  rc <- RestoreContext$new("?w=&__subapp__=1")
  expect_identical(rc$input$asList(), list())
  expect_identical(as.list(rc$values), list())
  expect_identical(rc$dir, NULL)
})