tests/testthat/test-slide.R

In r2pptx: Object Oriented R -> PowerPoint

expect_is_r2pptx_slide_list <- function(x) expect_true(is(x, "R2PptxSlideList"))


describe("R2PptxSlideList", {
  it("can be initialized", {
    x <- new("R2PptxSlideList")
    expect_is_r2pptx_slide_list(x)
  })
  it("succeeds when each element is a slide", {
    slide <- new_slide(layout = "test")
    x <- new("R2PptxSlideList", slides = list(slide))
    expect_is_r2pptx_slide_list(x)
  })
  it("fails when an element is not a slide", {
    expect_error(new("R2PptxSlideList", slides = list("x")))
  })
})


describe("show R2PptxSlide", {
  it("prints as expected", {
    slide <- new_slide(layout = "test", elements = list(new_element("x", "x")))
    msg <- capture.output(print(slide))
    expect_equal(
      msg,
      c("Slide with layout `test` and 1 elements:", "-  character")
    )
  })
})


describe("asSlideList", {
  it("works when input is a list of slides", {
    slide <- new_slide(layout = "test")
    x <- asSlideList(list(slide, slide))
    expect_is_r2pptx_slide_list(x)
  })
  it("works when input is a slide", {
    slide <- new_slide(layout = "test")
    x <- asSlideList(slide)
    expect_is_r2pptx_slide_list(x)
  })
})

describe("append_slide", {
  it("works for two slides", {
    slide <- new_slide(layout = "test")
    x <- slide + slide
    expect_is_r2pptx_slide_list(x)
  })
  it("works for a slidelist and a slide", {
    slide <- new_slide(layout = "test")
    slidelist <- asSlideList(slide)
    x <- slidelist + slide
    expect_is_r2pptx_slide_list(x)
  })
  it("works for a slide and a slidelist", {
    slide <- new_slide(layout = "test")
    slidelist <- asSlideList(slide)
    x <- slide + slidelist
    expect_is_r2pptx_slide_list(x)
  })
  it("works for a slidelist and a slidelist", {
    slide <- new_slide(layout = "test")
    slidelist <- asSlideList(slide)
    x <- slidelist + slidelist
    expect_is_r2pptx_slide_list(x)
  })
})


describe("new_slide", {
  it("works when input elements is an element", {
    e <- new_element(key = "test", value = "test")
    x <- new_slide(layout = "test", e)
    expect_true(is(x, "R2PptxSlide"))
    expect_equal(x@elements, list(e))
  })
  it("works when input element sis a list of elements", {
    e <- new_element(key = "test", value = "test")
    x <- new_slide(layout = "test", list(e))
    expect_true(is(x, "R2PptxSlide"))
    expect_equal(x@elements, list(e))
  })
  it("fails when input elements is other than expected", {
    expect_error(new_slide("test", "lol"),
                 regexp = "should be or extend class \"list\"")
  })
  it("fails when layout is missing", {
    expect_error(
      new_slide(),
      regexp = "`layout` was missing. See `officer::plot_layout_properties\\(\\)` for key options"
    )
  })
})


describe("new_slidelist", {
  it("works with empty call", {
    x <- new_slidelist()
    expect_is_r2pptx_slide_list(x)
  })
  it("works with list of slides", {
    slides_list <- list()
    for (i in 1:2) {
      slides_list[[i]] <- new_slide("test")
    }
    x <- new_slidelist(slides_list)
    expect_is_r2pptx_slide_list(x)
  })
  it("works with a slide", {
    x <- new_slidelist(new_slide("test"))
    expect_is_r2pptx_slide_list(x)
  })
})