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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))
panel_map_one <- function(facet, data, plot_data = data) {
layout <- create_layout(facet)
layout$setup(list(data), plot_data)[[1]]
}
test_that("two col cases with no missings adds a single extra column", {
loc <- panel_map_one(facet_grid(cyl~vs), mtcars)
expect_equal(nrow(loc), nrow(mtcars))
expect_equal(ncol(loc), ncol(mtcars) + 1)
match <- unique(loc[c("cyl", "vs", "PANEL")])
expect_equal(nrow(match), 5)
})
test_that("margins add extra data", {
loc <- panel_map_one(facet_grid(a~b, margins = "b"), df)
expect_equal(nrow(loc), nrow(df) * 2)
})
test_that("grid: missing facet columns are duplicated", {
facet <- facet_grid(a~b)
loc_a <- panel_map_one(facet, df_a, plot_data = df)
expect_equal(nrow(loc_a), 4)
expect_equal(loc_a$PANEL, factor(c(1, 3, 2, 4)))
loc_b <- panel_map_one(facet, df_b, plot_data = df)
expect_equal(nrow(loc_b), 4)
expect_equal(loc_b$PANEL, factor(1:4))
loc_c <- panel_map_one(facet, df_c, plot_data = df)
expect_equal(nrow(loc_c), 4)
expect_equal(loc_c$PANEL, factor(1:4))
})
test_that("wrap: missing facet columns are duplicated", {
facet <- facet_wrap(~a+b, ncol = 1)
loc_a <- panel_map_one(facet, df_a, plot_data = df)
expect_equal(nrow(loc_a), 4)
expect_equal(loc_a$PANEL, factor(c(1, 3, 2, 4)))
expect_equal(loc_a$a, c(1, 2, 1, 2))
loc_b <- panel_map_one(facet, df_b, plot_data = df)
expect_equal(nrow(loc_b), 4)
expect_equal(loc_b$PANEL, factor(1:4))
loc_c <- panel_map_one(facet, df_c, plot_data = df)
expect_equal(nrow(loc_c), 4)
expect_equal(loc_c$PANEL, factor(1:4))
})
test_that("wrap and grid can facet by a date variable", {
date_df <- data_frame(date_var = as.Date(c("1971-12-11", "1987-01-13", "2000-01-01")))
wrap <- facet_wrap(~date_var)
loc_wrap <- panel_map_one(wrap, date_df)
expect_equal(loc_wrap$PANEL, factor(1:3))
grid_col <- facet_grid(~date_var)
loc_grid_col <- panel_map_one(grid_col, date_df)
expect_equal(loc_grid_col$PANEL, factor(1:3))
grid_row <- facet_grid(date_var ~ .)
loc_grid_row <- panel_map_one(grid_row, date_df)
expect_equal(loc_grid_row$PANEL, factor(1:3))
})
test_that("wrap and grid can facet by a POSIXct variable", {
date_df <- data_frame(date_var = as.POSIXct(c("1971-12-11", "1987-01-13", "2000-01-01")))
wrap <- facet_wrap(~date_var)
loc_wrap <- panel_map_one(wrap, date_df)
expect_equal(loc_wrap$PANEL, factor(1:3))
grid_col <- facet_grid(~date_var)
loc_grid_col <- panel_map_one(grid_col, date_df)
expect_equal(loc_grid_col$PANEL, factor(1:3))
grid_row <- facet_grid(date_var ~ .)
loc_grid_row <- panel_map_one(grid_row, date_df)
expect_equal(loc_grid_row$PANEL, factor(1:3))
})
# 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 are located correctly", {
facet <- facet_wrap(~b, ncol = 1)
loc_b <- panel_map_one(facet, data_frame(b = NA), plot_data = a3)
expect_equal(as.character(loc_b$PANEL), "4")
facet <- facet_wrap(~c, ncol = 1)
loc_c <- panel_map_one(facet, data_frame(c = NA), plot_data = a3)
expect_equal(as.character(loc_c$PANEL), "4")
})
test_that("grid: missing values are located correctly", {
facet <- facet_grid(b~.)
loc_b <- panel_map_one(facet, data_frame(b = NA), plot_data = a3)
expect_equal(as.character(loc_b$PANEL), "4")
facet <- facet_grid(c~.)
loc_c <- panel_map_one(facet, data_frame(c = NA), plot_data = a3)
expect_equal(as.character(loc_c$PANEL), "4")
})
# Facet order ----------------------------------------------------------------
get_layout <- function(p) ggplot_build(p)$layout$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 = factor("a"), fy = factor("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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