expect_traces <- function(gg, n.traces, name) {
  stopifnot(is.numeric(n.traces))
  L <- expect_doppelganger_built(gg, paste0("rect-", name))
  all.traces <- L$data
  no.data <- sapply(all.traces, function(tr) {
    is.null(tr[["x"]]) && is.null(tr[["y"]])
  })
  has.data <- all.traces[!no.data]
  expect_equivalent(length(has.data), n.traces)
  list(data=has.data, layout=L$layout)
}

df <- data.frame(
  x = sample(10, 20, replace = TRUE),
  y = sample(10, 20, replace = TRUE)
)

gg <- ggplot(df, aes(xmin = x, xmax = x + 1, ymin = y, ymax = y + 2)) +
  geom_rect()

test_that('geom_rect becomes 1 trace with mode="lines" fill="toself"', {
  info <- expect_traces(gg, 1, "black")
  tr <- info$data[[1]]
  expect_identical(tr$fill, "toself")
  expect_identical(tr$type, "scatter")
  expect_identical(tr$mode, "lines")
  for(xy in c("x", "y")) {
    expect_true(anyNA(tr[[xy]]))
  }
})

df4 <- data.frame(
  x = 1:4, 
  status = c("cool", "not", "not", "cool")
)

gg4 <- ggplot(df4, aes(xmin = x, xmax = x + 0.5, ymin = 0, ymax = 1)) +
  geom_rect()

test_that('trace contains NA back to 1st rect', {
  info <- expect_traces(gg4, 1, "black4")
  tr <- info$data[[1]]
  expect_identical(tr$fill, "toself")
  expect_identical(tr$type, "scatter")
  expect_identical(tr$mode, "lines")
  expected.x <- c(1, 1, 1.5, 1.5, 1, NA,
                  2, 2, 2.5, 2.5, 2, NA,
                  3, 3, 3.5, 3.5, 3, NA,
                  4, 4, 4.5, 4.5, 4)
  expect_equivalent(tr$x, expected.x)
  expected.y <- c(0, 1, 1, 0, 0, NA,
                  0, 1, 1, 0, 0, NA,
                  0, 1, 1, 0, 0, NA,
                  0, 1, 1, 0, 0)
  expect_equivalent(tr$y, expected.y)
})

rect.color <- ggplot(df4, aes(xmin = x, xmax = x + 0.5, ymin = 0, ymax = 1)) +
  geom_rect(aes(color = status), fill="grey")

test_that('rect color', {
  info <- expect_traces(rect.color, 2, "color")
  traces.by.name <- list()
  for(tr in info$data){
    expect_true(tr$fillcolor == toRGB("grey"))
    expect_true(tr$fill == "toself")
    expect_equivalent(tr$y, c(0, 1, 1, 0, 0, NA, 0, 1, 1, 0, 0))
    traces.by.name[[tr$name]] <- tr
  }
  expect_equivalent(
    traces.by.name[[1]]$x, c(1, 1, 1.5, 1.5, 1, NA, 4, 4, 4.5, 4.5, 4)
  )
  expect_equivalent(
    traces.by.name[[2]]$x,c(2, 2, 2.5, 2.5, 2, NA, 3, 3, 3.5, 3.5, 3)
  )
  expect_false(
    traces.by.name[[1]]$line$color == traces.by.name[[2]]$line$color
  )
})

rect.fill <- ggplot(df4, aes(xmin = x, xmax = x + 0.5, ymin = 0, ymax = 1)) +
  geom_rect(aes(fill = status))

test_that('rect color', {
  info <- expect_traces(rect.fill, 2, "fill")
  traces.by.name <- list()
  for(tr in info$data){
    expect_true(tr$line$color == "transparent")
    expect_true(tr$fill == "toself")
    expect_equivalent(tr$y, c(0, 1, 1, 0, 0, NA, 0, 1, 1, 0, 0))
    traces.by.name[[tr$name]] <- tr
  }
  expect_equivalent(
    traces.by.name[[1]]$x, c(1, 1, 1.5, 1.5, 1, NA, 4, 4, 4.5, 4.5, 4)
  )
  expect_equivalent(
    traces.by.name[[2]]$x, c(2, 2, 2.5, 2.5, 2, NA, 3, 3, 3.5, 3.5, 3)
  )
  expect_false(
    traces.by.name[[1]]$fillcolor == traces.by.name[[2]]$fillcolor
  )
})

rect.fill.color <-
  ggplot(df4, aes(xmin = x, xmax = x + 0.5, ymin = 0, ymax = 1)) +
  geom_rect(aes(fill = status), color="black")

test_that('rect aes(fill) with constant color', {
  info <- expect_traces(rect.fill.color, 2, "fill-color")
  traces.by.name <- list()
  for(tr in info$data){
    expect_true(tr$line$color == toRGB("black"))
    expect_true(tr$fill == "toself")
    expect_equivalent(
      tr$y, c(0, 1, 1, 0, 0, NA, 0, 1, 1, 0, 0)
    )
    traces.by.name[[tr$name]] <- tr
  }
  expect_equivalent(
    traces.by.name[[1]]$x, c(1, 1, 1.5, 1.5, 1, NA, 4, 4, 4.5, 4.5, 4)
  )
  expect_equivalent(
    traces.by.name[[2]]$x, c(2, 2, 2.5, 2.5, 2, NA, 3, 3, 3.5, 3.5, 3)
  )
  expect_false(
    traces.by.name[[1]]$fillcolor == traces.by.name[[2]]$fillcolor
  )
})


p <- ggplot(data = data.frame(x1 = 1, x2 = 2, y1 = 1, y2 = 2)) + 
  geom_rect(aes(xmin = x1, xmax = x2, ymin = y1, ymax = y2), 
            fill = "#00000011", color = "black")

test_that('Specifying alpha in hex color code works', {
  info <- expect_traces(p, 1, "fill-hex-alpha")
  expect_match(info$data[[1]]$fillcolor, "rgba\\(0,0,0,0\\.0[6]+")
})