test_that("writeData() forces evaluation of x (#264)", {
  wbfile <- temp_xlsx()
  op <- options(stringsAsFactors = FALSE)
  
  x <- format(123.4)
  df <- data.frame(d = format(123.4))
  df2 <- data.frame(e = x)
  
  wb <- createWorkbook()
  addWorksheet(wb, "sheet")
  writeData(wb, "sheet", startCol = 1, data.frame(a = format(123.4)))
  writeData(wb, "sheet", startCol = 2, data.frame(b = as.character(123.4)))
  writeData(wb, "sheet", startCol = 3, data.frame(c = "123.4"))
  writeData(wb, "sheet", startCol = 4, df)
  writeData(wb, "sheet", startCol = 5, df2)
  
  saveWorkbook(wb, wbfile)
  out <- read.xlsx(wbfile)
  
  # Possibly overkill
  
  with(out, {
    expect_identical(a, b)
    expect_identical(a, c)
    expect_identical(a, d)
    expect_identical(a, e)
    expect_identical(b, c)
    expect_identical(b, d)
    expect_identical(b, e)
    expect_identical(c, d)
    expect_identical(c, e)
    expect_identical(d, e)
  })
  
  options(op)
  file.remove(wbfile)
})


test_that("as.character.formula() works [312]", {
  form <- y ~ x1 * x2 + x3
  expect_identical(
    as.character.default(form),
    openxlsx:::as.character.formula(form)
  )
  
  skip_if_not_installed(
    "formula.tools",
    "tests specifically for as.character.formula conflict"
  )
  
  foo <- function() {
    wb <- openxlsx::buildWorkbook(
      data.frame(
        x = structure("A2 + B2", class = c("character", "formula")),
        stringsAsFactors = FALSE
      )
    )
    as.list(wb$worksheets[[1]]$sheet_data)
  }
  
  before <- foo()
  # don't required the "require" function for deps  check
  match.fun("require")("formula.tools", character.only = TRUE)
  middle <- foo()
  detach("package:formula.tools", character.only = TRUE, force = TRUE)
  end <- foo()
  
  expect_identical(before, middle, ignore.environment = TRUE)
  expect_identical(before, end,    ignore.environment = TRUE)
})