/usr/lib/R/site-library/gtable/tests/test-layout.r is in r-cran-gtable 0.1.2-1.1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | library(testthat)
# Find location of a grob
gtable_find <- function(x, grob) {
pos <- vapply(x$grobs, identical, logical(1), grob)
x$layout[pos, ]
}
loc_df <- function(t, l, b, r) {
data.frame(t, l, b, r, z = 1, clip = "on", name = "layout",
stringsAsFactors = FALSE)
}
context("gtable")
test_that("Number of rows grows with add_rows", {
layout <- gtable()
expect_that(nrow(layout), equals(0))
layout <- gtable_add_rows(layout, unit(1, "cm"))
expect_that(nrow(layout), equals(1))
layout <- gtable_add_rows(layout, unit(1, "cm"))
layout <- gtable_add_rows(layout, unit(1, "cm"))
expect_that(nrow(layout), equals(3))
layout <- gtable_add_rows(layout, unit(1:2, "cm"))
expect_that(nrow(layout), equals(5))
})
test_that("Number of columns grows with add_cols", {
layout <- gtable()
expect_that(ncol(layout), equals(0))
layout <- gtable_add_cols(layout, unit(1, "cm"))
expect_that(ncol(layout), equals(1))
layout <- gtable_add_cols(layout, unit(c(1, 1), "cm"))
expect_that(ncol(layout), equals(3))
layout <- gtable_add_cols(layout, unit(1:2, "cm"))
expect_that(ncol(layout), equals(5))
})
test_that("Setting and getting works", {
layout <- gtable_add_cols(gtable_add_rows(gtable(), cm), cm)
layout <- gtable_add_grob(layout, grob1, 1, 1)
loc <- gtable_find(layout, grob1)
expect_that(nrow(loc), equals(1))
expect_that(loc$t, equals(1))
expect_that(loc$r, equals(1))
expect_that(loc$b, equals(1))
expect_that(loc$l, equals(1))
})
test_that("Spanning grobs continue to span after row insertion", {
layout <- gtable_add_cols(gtable_add_rows(gtable(), rep(cm, 3)), rep(cm, 3))
layout <- gtable_add_grob(layout, grob1, 1, 1, 3, 3)
within <- gtable_add_rows(gtable_add_cols(layout, cm, pos = 2), cm, pos = 2)
loc <- gtable_find(within, grob1)
expect_that(loc, equals(loc_df(t = 1, l = 1, b = 4, r = 4)))
top_left <- layout
top_left <- gtable_add_cols(top_left, cm, pos = 0)
top_left <- gtable_add_rows(top_left, cm, pos = 0)
loc <- gtable_find(top_left, grob1)
expect_that(loc, equals(loc_df(t = 2, l = 2, b = 4, r = 4)))
bottom_right <- layout
bottom_right <- gtable_add_cols(bottom_right, cm)
bottom_right <- gtable_add_rows(bottom_right, cm)
loc <- gtable_find(bottom_right, grob1)
expect_that(loc, equals(loc_df(t = 1, l = 1, b = 3, r = 3)))
})
test_that("n + 1 new rows/cols after spacing", {
layout <- gtable()
layout <- gtable_add_rows(layout, rep(cm, 3))
layout <- gtable_add_cols(layout, rep(cm, 3))
layout <- gtable_add_col_space(layout, cm)
expect_that(ncol(layout), equals(5))
layout <- gtable_add_row_space(layout, cm)
expect_that(ncol(layout), equals(5))
})
test_that("Spacing adds rows/cols in correct place", {
layout <- gtable()
layout <- gtable_add_rows(layout, rep(cm, 2))
layout <- gtable_add_cols(layout, rep(cm, 2))
layout <- gtable_add_col_space(layout, null)
layout <- gtable_add_row_space(layout, null)
expect_that(as.vector(layout$heights), equals(rep(1, 3)))
expect_that(attr(layout$heights, "unit"), equals(c("cm", "null", "cm")))
expect_that(as.vector(layout$widths), equals(rep(1, 3)))
expect_that(attr(layout$widths, "unit"), equals(c("cm", "null", "cm")))
})
test_that("Negative positions place from end", {
layout <- gtable()
layout <- gtable_add_rows(layout, rep(cm, 3))
layout <- gtable_add_cols(layout, rep(cm, 3))
col_span <- gtable_add_grob(layout, grob1, t = 1, l = 1, r = -1)
expect_that(gtable_find(col_span, grob1),
equals(loc_df(t = 1, l = 1, b = 1, r = 3)))
row_span <- gtable_add_grob(layout, grob1, t = 1, l = 1, b = -1)
expect_that(gtable_find(row_span, grob1),
equals(loc_df(t = 1, l = 1, b = 3, r = 1)))
})
test_that("Adding multiple grobs", {
grobs <- rep(list(grob1), 8)
# With z = Inf, and t value for each grob
tval <- c(1, 2, 3, 1, 2, 3, 1, 2)
layout <- gtable_add_cols(gtable_add_rows(gtable(), rep(cm, 3)), rep(cm, 3))
layout <- gtable_add_grob(layout, grobs, tval, 1, 3, 3, z = Inf)
expect_equal(layout$layout$t, tval)
expect_equal(layout$layout$z, 1:8)
# With z = -Inf
layout <- gtable_add_cols(gtable_add_rows(gtable(), rep(cm, 3)), rep(cm, 3))
layout <- gtable_add_grob(layout, grobs, 1, 1, 3, 3, z = -Inf)
expect_equal(layout$layout$z, -7:0)
# Mixing Inf and non-Inf z values
zval <- c(Inf, Inf, 6, 0, -Inf, Inf, -2, -Inf)
layout <- gtable_add_cols(gtable_add_rows(gtable(), rep(cm, 3)), rep(cm, 3))
layout <- gtable_add_grob(layout, grobs, 1, 1, 3, 3, z = zval)
expect_equal(layout$layout$z, c(7, 8, 6, 0, -4, 9, -2, -3))
# Error if inputs are not length 1 or same length as grobs
layout <- gtable_add_cols(gtable_add_rows(gtable(), rep(cm, 3)), rep(cm, 3))
expect_error(gtable_add_grob(layout, grobs, c(1:3), 1, 3, 3))
expect_error(gtable_add_grob(layout, grobs, tval, 1:2, 3, 3))
expect_error(gtable_add_grob(layout, grobs, tval, 1, 3, 3, z = 1:4))
})
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