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context("Facetting (location)")
df <- expand.grid(a = 1:2, b = 1:2)
df_a <- unique(df["a"])
df_b <- unique(df["b"])
df_c <- unique(data.frame(c = 1))
test_that("two col cases with no missings adds single extra column", {
vscyl <- layout_grid(list(mtcars), "cyl", "vs")
loc <- locate_grid(mtcars, vscyl, "cyl", "vs")
expect_that(nrow(loc), equals(nrow(mtcars)))
expect_that(ncol(loc), equals(ncol(mtcars) + 1))
match <- unique(loc[c("cyl", "vs", "PANEL")])
expect_that(nrow(match), equals(5))
})
test_that("margins add extra data", {
panel <- layout_grid(list(df), "a", "b", margins = "b")
loc <- locate_grid(df, panel, "a", "b", margins = "b")
expect_that(nrow(loc), equals(nrow(df) * 2))
})
test_that("grid: missing facet columns are duplicated", {
panel <- layout_grid(list(df), "a", "b")
loc_a <- locate_grid(df_a, panel, "a", "b")
expect_that(nrow(loc_a), equals(4))
expect_that(loc_a$PANEL, equals(factor(1:4)))
loc_b <- locate_grid(df_b, panel, "a", "b")
expect_that(nrow(loc_b), equals(4))
expect_that(loc_b$PANEL, equals(factor(1:4)))
loc_c <- locate_grid(df_c, panel, "a", "b")
expect_that(nrow(loc_c), equals(4))
expect_that(loc_c$PANEL, equals(factor(1:4)))
})
test_that("wrap: missing facet columns are duplicated", {
panel <- layout_wrap(list(df), c("a", "b"), ncol = 1)
loc_a <- locate_wrap(df_a, panel, c("a", "b"))
expect_that(nrow(loc_a), equals(4))
expect_that(loc_a$PANEL, equals(factor(1:4)))
expect_that(loc_a$a, equals(c(1, 1, 2, 2)))
loc_b <- locate_wrap(df_b, panel, c("a", "b"))
expect_that(nrow(loc_b), equals(4))
expect_that(loc_b$PANEL, equals(factor(1:4)))
loc_c <- locate_wrap(df_c, panel, c("a", "b"))
expect_that(nrow(loc_c), equals(4))
expect_that(loc_c$PANEL, equals(factor(1:4)))
})
# Missing behaviour ----------------------------------------------------------
a3 <- data.frame(
# a = c(1:3, NA), Not currently supported
b = factor(c(1:3, NA)),
c = factor(c(1:3, NA), exclude = NULL)
)
test_that("wrap: missing values located correctly", {
panel_b <- layout_wrap(list(a3), "b", ncol = 1)
loc_b <- locate_wrap(data.frame(b = NA), panel_b, "b")
expect_equal(as.character(loc_b$PANEL), "4")
panel_c <- layout_wrap(list(a3), "c", ncol = 1)
loc_c <- locate_wrap(data.frame(c = NA), panel_c, "c")
expect_equal(as.character(loc_c$PANEL), "4")
})
test_that("grid: missing values located correctly", {
panel_b <- layout_grid(list(a3), "b")
loc_b <- locate_grid(data.frame(b = NA), panel_b, "b")
expect_equal(as.character(loc_b$PANEL), "4")
panel_c <- layout_grid(list(a3), "c")
loc_c <- locate_grid(data.frame(c = NA), panel_c, "c")
expect_equal(as.character(loc_c$PANEL), "4")
})
# Facet order ----------------------------------------------------------------
get_layout <- function(p) ggplot_build(p)$panel$layout
# Data with factor f with levels CBA
d <- data.frame(x = 1:9, y = 1:9,
fx = factor(rep(letters[1:3], each = 3), levels = letters[3:1]),
fy = factor(rep(LETTERS[1:3], each = 3), levels = LETTERS[3:1]))
# Data with factor f with only level B
d2 <- data.frame(x = 1:9, y = 2:10, fx = "a", fy = "B")
test_that("grid: facet order follows default data frame order", {
# Facets should be in order:
# CBA for rows 1:3
# cba for cols 1:3
lay <- get_layout(ggplot(d, aes(x, y)) + facet_grid(fy ~ fx) + geom_point())
expect_equal(as.character(lay$fy), c("C","B","A")[lay$ROW])
expect_equal(as.character(lay$fx), c("c","b","a")[lay$COL])
# When adding d2, facets should still be in order:
# CBA for rows 1:3
# cba for cols 1:3
lay <- get_layout(ggplot(d, aes(x, y)) + facet_grid(fy ~ fx) +
geom_blank(data = d2) + geom_point())
expect_equal(as.character(lay$fy), c("C","B","A")[lay$ROW])
expect_equal(as.character(lay$fx), c("c","b","a")[lay$COL])
# With no default data: should search each layer in order
# BCA for rows 1:3
# acb for cols 1:3
lay <- get_layout(ggplot(mapping = aes(x, y)) + facet_grid(fy ~ fx) +
geom_blank(data = d2) + geom_point(data=d))
expect_equal(as.character(lay$fy), c("B","C","A")[lay$ROW])
expect_equal(as.character(lay$fx), c("a","c","b")[lay$COL])
# Same as previous, but different layer order.
# CBA for rows 1:3
# cba for cols 1:3
lay <- get_layout(ggplot(mapping = aes(x, y)) + facet_grid(fy ~ fx) +
geom_point(data = d) + geom_blank(data = d2))
expect_equal(as.character(lay$fy), c("C","B","A")[lay$ROW])
expect_equal(as.character(lay$fx), c("c","b","a")[lay$COL])
})
test_that("wrap: facet order follows default data frame order", {
# Facets should be in order:
# cba for panels 1:3
lay <- get_layout(ggplot(d, aes(x, y)) + facet_wrap(~ fx) + geom_point())
expect_equal(as.character(lay$fx), c("c","b","a")[lay$PANEL])
# When adding d2, facets should still be in order:
# cba for panels 1:3
lay <- get_layout(ggplot(d, aes(x, y)) + facet_wrap(~ fx) +
geom_blank(data = d2) + geom_point())
expect_equal(as.character(lay$fx), c("c","b","a")[lay$PANEL])
# With no default data: should search each layer in order
# acb for panels 1:3
lay <- get_layout(ggplot(mapping = aes(x, y)) + facet_wrap(~ fx) +
geom_blank(data = d2) + geom_point(data=d))
expect_equal(as.character(lay$fx), c("a","c","b")[lay$PANEL])
# Same as previous, but different layer order.
# cba for panels 1:3
lay <- get_layout(ggplot(mapping = aes(x, y)) + facet_wrap(~ fx) +
geom_point(data = d) + geom_blank(data = d2))
expect_equal(as.character(lay$fx), c("c","b","a")[lay$PANEL])
})
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