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context("coord_sf")
test_that("basic plot builds without error", {
skip_if_not_installed("sf")
nc_tiny_coords <- matrix(
c(-81.473, -81.741, -81.67, -81.345, -81.266, -81.24, -81.473,
36.234, 36.392, 36.59, 36.573, 36.437, 36.365, 36.234),
ncol = 2
)
nc <- sf::st_as_sf(
data_frame(
NAME = "ashe",
geometry = sf::st_sfc(sf::st_polygon(list(nc_tiny_coords)), crs = 4326)
)
)
expect_doppelganger("sf-polygons", ggplot(nc) + geom_sf() + coord_sf())
})
test_that("graticule lines can be removed via theme", {
skip_if_not_installed("sf")
df <- data_frame(x = c(1, 2, 3), y = c(1, 2, 3))
plot <- ggplot(df, aes(x, y)) +
geom_point() +
coord_sf() +
theme_gray() + # to test for presence of background grob
theme(panel.grid = element_blank())
expect_doppelganger("no panel grid", plot)
})
test_that("axis labels are correct for manual breaks", {
skip_if_not_installed("sf")
plot <- ggplot(sf::st_polygon(list(matrix(1e3*c(1, 2, 3, 1, 1, 3, 2, 1), ncol = 2)))) +
geom_sf()
# autogenerated labels
b <- ggplot_build(
plot +
scale_x_continuous(breaks = c(1000, 2000, 3000)) +
scale_y_continuous(breaks = c(1000, 1500, 2000))
)
graticule <- b$layout$panel_params[[1]]$graticule
expect_identical(
graticule[graticule$type == "E", ]$degree_label,
c("1000", "2000", "3000")
)
expect_identical(
graticule[graticule$type == "N", ]$degree_label,
c("1000", "1500", "2000")
)
})
test_that("axis labels can be set manually", {
skip_if_not_installed("sf")
plot <- ggplot(sf::st_polygon(list(matrix(1e3*c(1, 2, 3, 1, 1, 3, 2, 1), ncol = 2)))) +
geom_sf()
# character labels
b <- ggplot_build(
plot +
scale_x_continuous(
breaks = c(1000, 2000, 3000),
labels = c("A", "B", "C")
) +
scale_y_continuous(
breaks = c(1000, 1500, 2000),
labels = c("D", "E", "F")
)
)
graticule <- b$layout$panel_params[[1]]$graticule
expect_identical(
graticule[graticule$type == "E", ]$degree_label,
c("A", "B", "C")
)
expect_identical(
graticule[graticule$type == "N", ]$degree_label,
c("D", "E", "F")
)
})
test_that("factors are treated like character labels and are not parsed", {
skip_if_not_installed("sf")
plot <- ggplot(sf::st_polygon(list(matrix(1e3*c(1, 2, 3, 1, 1, 3, 2, 1), ncol = 2)))) +
geom_sf()
b <- ggplot_build(
plot +
scale_x_continuous(
breaks = c(1000, 2000, 3000),
labels = factor(c("A", "B", "C"))
) +
scale_y_continuous(
breaks = c(1000, 1500, 2000),
labels = factor(c("1 * degree * N", "1.5 * degree * N", "2 * degree * N"))
)
)
graticule <- b$layout$panel_params[[1]]$graticule
expect_identical(
graticule[graticule$type == "E", ]$degree_label,
c("A", "B", "C")
)
expect_identical(
graticule[graticule$type == "N", ]$degree_label,
c("1 * degree * N", "1.5 * degree * N", "2 * degree * N")
)
})
test_that("expressions can be mixed with character labels", {
skip_if_not_installed("sf")
plot <- ggplot(sf::st_polygon(list(matrix(1e3*c(1, 2, 3, 1, 1, 3, 2, 1), ncol = 2)))) +
geom_sf()
b <- ggplot_build(
plot +
scale_x_continuous(
breaks = c(1000, 2000, 3000),
labels = c("A", "B", "C")
) +
scale_y_continuous(
breaks = c(1000, 1500, 2000),
labels = parse(text = c("10^3", "1.5 %*% 10^3", "2 %*% 10^3"))
)
)
graticule <- b$layout$panel_params[[1]]$graticule
expect_identical(
graticule[graticule$type == "E", ]$degree_label,
as.list(c("A", "B", "C"))
)
parsed <- vector("list", 3)
parsed[1:3] <- parse(text = c("10^3", "1.5 %*% 10^3", "2 %*% 10^3"))
expect_identical(
graticule[graticule$type == "N", ]$degree_label,
parsed
)
# reverse x and y from previous test
b <- ggplot_build(
plot +
scale_y_continuous(
breaks = c(1000, 2000, 3000),
labels = c("A", "B", "C")
) +
scale_x_continuous(
breaks = c(1000, 1500, 2000),
labels = parse(text = c("10^3", "1.5 %*% 10^3", "2 %*% 10^3"))
)
)
graticule <- b$layout$panel_params[[1]]$graticule
expect_identical(
graticule[graticule$type == "N", ]$degree_label,
as.list(c("A", "B", "C"))
)
parsed <- vector("list", 3)
parsed[1:3] <- parse(text = c("10^3", "1.5 %*% 10^3", "2 %*% 10^3"))
expect_identical(
graticule[graticule$type == "E", ]$degree_label,
parsed
)
})
test_that("degree labels are automatically parsed", {
skip_if_not_installed("sf")
data <- sf::st_sfc(
sf::st_polygon(list(matrix(1e1*c(1, 2, 3, 1, 1, 3, 2, 1), ncol = 2))),
crs = 4326 # basic long-lat crs
)
plot <- ggplot(data) + geom_sf()
b <- ggplot_build(
plot +
scale_x_continuous(breaks = c(10, 20, 30)) +
scale_y_continuous(breaks = c(10, 15, 20))
)
graticule <- b$layout$panel_params[[1]]$graticule
expect_setequal(
graticule[graticule$type == "N", ]$degree,
c(10, 15, 20)
)
expect_setequal(
graticule[graticule$type == "E", ]$degree,
c(10, 20, 30)
)
expect_true(all(vapply(graticule$degree_label, is.language, logical(1))))
})
test_that("Inf is squished to range", {
skip_if_not_installed("sf")
d <- cdata(
ggplot(sf::st_point(c(0, 0))) +
geom_sf() +
annotate("text", -Inf, Inf, label = "Top-left")
)
expect_equal(d[[2]]$x, 0)
expect_equal(d[[2]]$y, 1)
})
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