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context("Facetting (layout)")
a <- data.frame(a = c(1, 1, 2, 2), b = c(1, 2, 1, 1))
b <- data.frame(a = 3)
c <- data.frame(b = 3)
empty <- data.frame()
test_that("all: no rows and cols gives null layout", {
expect_that(layout_grid(list(a)), equals(layout_null()))
expect_that(layout_wrap(list(a)), equals(layout_null()))
})
test_that("grid: single row and single col equivalent", {
row <- layout_grid(list(a), row = "a")
col <- layout_grid(list(a), col = "a")
expect_that(row$ROW, equals(1:2))
expect_that(row$ROW, equals(col$COL))
expect_that(row[c("PANEL", "a")], equals(col[c("PANEL", "a")]))
row <- layout_grid(list(a, b), row = "a")
col <- layout_grid(list(a, b), col = "a")
expect_that(row$ROW, equals(1:3))
expect_that(row$ROW, equals(col$COL))
expect_that(row[c("PANEL", "a")], equals(col[c("PANEL", "a")]))
})
test_that("grid: includes all combinations", {
d <- data.frame(a = c(1, 2), b = c(2, 1))
all <- layout_grid(list(d), row = "a", col = "b")
expect_that(nrow(all), equals(4))
})
test_that("wrap and grid equivalent for 1d data", {
rowg <- layout_grid(list(a), row = "a")
roww <- layout_wrap(list(a), "a", ncol = 1)
expect_that(roww, equals(rowg))
colg <- layout_grid(list(a), col = "a")
colw <- layout_wrap(list(a), "a", nrow = 1)
expect_that(colw, equals(colg))
})
test_that("grid: crossed rows/cols create no more combinations than necessary", {
one <- layout_grid(list(a), "a", "b")
expect_that(nrow(one), equals(4))
one_a <- layout_grid(list(a, empty), "a", "b")
expect_that(nrow(one_a), equals(4))
two <- layout_grid(list(a, b), "a", "b")
expect_that(nrow(two), equals(4 + 2))
three <- layout_grid(list(a, b, c), "a", "b")
expect_that(nrow(three), equals(9))
four <- layout_grid(list(b, c), "a", "b")
expect_that(nrow(four), equals(1))
})
test_that("grid: nested rows/cols create no more combinations than necessary", {
one <- layout_grid(list(mpg), c("drv", "cyl"))
expect_that(one$PANEL, equals(factor(1:9)))
expect_that(one$ROW, equals(1:9))
})
test_that("grid: margins add correct combinations", {
one <- layout_grid(list(a), "a", "b", margins = TRUE)
expect_that(nrow(one), equals(4 + 2 + 2 + 1))
})
test_that("wrap: as.table reverses rows", {
one <- layout_wrap(list(a), "a", ncol = 1, as.table = FALSE)
expect_that(one$ROW, equals(c(2, 1)))
two <- layout_wrap(list(a), "a", nrow = 1, as.table = FALSE)
expect_that(two$ROW, equals(c(1, 1)))
})
test_that("grid: as.table reverses rows", {
one <- layout_grid(list(a), "a", as.table = FALSE)
expect_that(as.character(one$a), equals(c("2", "1")))
two <- layout_grid(list(a), "a", as.table = TRUE)
expect_that(as.character(two$a), equals(c("1", "2")))
})
# Drop behaviour -------------------------------------------------------------
a2 <- data.frame(
a = factor(1:3, levels = 1:4),
b = factor(1:3, levels = 4:1)
)
test_that("layout_wrap: drop = FALSE preserves unused levels", {
wrap_a <- layout_wrap(list(a2), "a", drop = FALSE)
expect_equal(nrow(wrap_a), 4)
expect_equal(as.character(wrap_a$a), as.character(1:4))
wrap_b <- layout_wrap(list(a2), "b", drop = FALSE)
expect_equal(nrow(wrap_b), 4)
expect_equal(as.character(wrap_b$b), as.character(4:1))
})
test_that("layout_grid: drop = FALSE preserves unused levels", {
grid_a <- layout_grid(list(a2), "a", drop = FALSE)
expect_equal(nrow(grid_a), 4)
expect_equal(as.character(grid_a$a), as.character(1:4))
grid_b <- layout_grid(list(a2), "b", drop = FALSE)
expect_equal(nrow(grid_b), 4)
expect_equal(as.character(grid_b$b), as.character(4:1))
grid_ab <- layout_grid(list(a2), "a", "b", drop = FALSE)
expect_equal(nrow(grid_ab), 16)
expect_equal(as.character(grid_ab$a), as.character(rep(1:4, each = 4)))
expect_equal(as.character(grid_ab$b), as.character(rep(4:1, 4)))
})
# Missing behaviour ----------------------------------------------------------
a3 <- data.frame(
a = c(1:3, NA),
b = factor(c(1:3, NA)),
c = factor(c(1:3, NA), exclude = NULL)
)
test_that("missing values get a panel", {
wrap_a <- layout_wrap(list(a3), "a")
wrap_b <- layout_wrap(list(a3), "b")
wrap_c <- layout_wrap(list(a3), "c")
grid_a <- layout_grid(list(a3), "a")
grid_b <- layout_grid(list(a3), "b")
grid_c <- layout_grid(list(a3), "c")
expect_equal(nrow(wrap_a), 4)
expect_equal(nrow(wrap_b), 4)
expect_equal(nrow(wrap_c), 4)
expect_equal(nrow(grid_a), 4)
expect_equal(nrow(grid_b), 4)
expect_equal(nrow(grid_c), 4)
})
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