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test-ptd_create_ggplot.R
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test-ptd_create_ggplot.R
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library(testthat)
library(mockery)
# ptd_create_ggplot() ----
test_that("it raises an error if unknown arguments are passed", {
expect_warning(
try(
ptd_create_ggplot(NULL, X = 1, Y = 2),
silent = TRUE
),
"Unknown arguments provided by plot: X, Y\nCheck for common spelling mistakes in arguments.",
fixed = TRUE
)
})
test_that("it raises an error is x is not a ptd_spc_df object", {
expect_error(
ptd_create_ggplot(data.frame(x = 1, y = 2)),
"x argument must be an 'ptd_spc_df' object, created by ptd_spc()."
)
})
test_that("it calls ptd_validate_plot_options", {
m <- mock(stop())
stub(ptd_create_ggplot, "ptd_validate_plot_options", m)
stub(ptd_create_ggplot, "match.arg", identity)
try(
ptd_create_ggplot(
ptd_spc(data.frame(x = Sys.Date() + 1:20, y = rnorm(20)), "y", "x"),
"point_size",
"percentage_y_axis",
"main_title",
"x_axis_label",
"y_axis_label",
"fixed_x_axis_multiple",
"fixed_y_axis_multiple",
"x_axis_date_format",
"x_axis_breaks",
"y_axis_breaks",
"icons_size",
"icons_position",
"colours",
"theme_override",
"break_lines"
),
silent = TRUE
)
expect_called(m, 1)
expect_args(
m, 1,
"point_size",
"percentage_y_axis",
"main_title",
"x_axis_label",
"y_axis_label",
"fixed_x_axis_multiple",
"fixed_y_axis_multiple",
"x_axis_date_format",
"x_axis_breaks",
"y_axis_breaks",
"icons_size",
"icons_position",
"colours",
"theme_override",
"break_lines"
)
})
test_that("it returns a ggplot object", {
set.seed(123)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20))
s <- ptd_spc(d, "y", "x")
p <- ptd_create_ggplot(s)
expect_s3_class(p, c("gg", "ggplot"))
expect_length(p$layers, 8)
expect_equal(
p$labels,
list(
x = "X",
y = "Y",
group = NULL,
title = "SPC Chart of Y, starting 02/01/2020",
caption = NULL,
colour = "point_colour",
type = "type",
icon = "icon"
)
)
})
test_that("it facet's the plot if facet_field is set", {
set.seed(123)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20), g = rep(c(1, 2), each = 10))
withr::with_options(list(ptd_spc.warning_threshold = 10), {
s1 <- ptd_spc(d, "y", "x")
p1 <- ptd_create_ggplot(s1)
expect_equal(p1$facet$vars(), character())
s2 <- ptd_spc(d, "y", "x", facet_field = "g")
p2 <- ptd_create_ggplot(s2)
expect_equal(p2$facet$vars(), "f")
})
})
test_that("it sets the x_axis_breaks correctly", {
m <- mock()
stub(ptd_create_ggplot, "scale_x_datetime", m)
set.seed(123)
d <- data.frame(x = to_datetime("2020-01-01") + 1:20, y = rnorm(20))
s <- ptd_spc(d, "y", "x")
attr(d$x, "tzone") <- ""
# no breaks set
p1 <- ptd_create_ggplot(s)
p2 <- ptd_create_ggplot(s, x_axis_breaks = "3 days")
p3 <- ptd_create_ggplot(s, x_axis_date_format = "%Y-%m-%d")
p4 <- ptd_create_ggplot(s, x_axis_breaks = "3 days", x_axis_date_format = "%Y-%m-%d")
expect_called(m, 4)
expect_args(m, 1, breaks = d$x, date_labels = "%d/%m/%y")
expect_args(m, 2, date_breaks = "3 days", date_labels = "%d/%m/%y")
expect_args(m, 3, breaks = d$x, date_labels = "%Y-%m-%d")
expect_args(m, 4, date_breaks = "3 days", date_labels = "%Y-%m-%d")
})
test_that("it sets x_axis_label correctly", {
set.seed(123)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20))
s <- ptd_spc(d, "y", "x")
p1 <- ptd_create_ggplot(s)
expect_equal(p1$labels$x, "X")
p2 <- ptd_create_ggplot(s, x_axis_label = "X Axis Label")
expect_equal(p2$labels$x, "X Axis Label")
})
test_that("it sets y_axis_label correctly", {
set.seed(123)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20))
s <- ptd_spc(d, "y", "x")
p1 <- ptd_create_ggplot(s)
expect_equal(p1$labels$y, "Y")
p2 <- ptd_create_ggplot(s, y_axis_label = "Y Axis Label")
expect_equal(p2$labels$y, "Y Axis Label")
})
test_that("it sets scales correctly in a faceted plot", {
set.seed(123)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20), g = rep(c(1, 2), each = 10))
withr::with_options(list(ptd_spc.warning_threshold = 10), {
s <- ptd_spc(d, "y", "x", facet_field = "g")
})
p1 <- ptd_create_ggplot(s)
expect_false(p1$facet$params$free$x)
expect_false(p1$facet$params$free$y)
p2 <- ptd_create_ggplot(s, fixed_x_axis_multiple = FALSE)
expect_true(p2$facet$params$free$x)
expect_false(p2$facet$params$free$y)
p3 <- ptd_create_ggplot(s, fixed_y_axis_multiple = FALSE)
expect_false(p3$facet$params$free$x)
expect_true(p3$facet$params$free$y)
p4 <- ptd_create_ggplot(s, fixed_x_axis_multiple = FALSE, fixed_y_axis_multiple = FALSE)
expect_true(p4$facet$params$free$x)
expect_true(p4$facet$params$free$y)
p5 <- ptd_create_ggplot(s, fixed_x_axis_multiple = TRUE, fixed_y_axis_multiple = TRUE)
expect_false(p5$facet$params$free$x)
expect_false(p5$facet$params$free$y)
})
test_that("it sets the y-axis to percentages if percentage_y_axis is TRUE", {
set.seed(123)
m <- mock()
stub(ptd_create_ggplot, "scales::label_percent", m)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20))
s <- ptd_spc(d, "y", "x")
p1 <- ptd_create_ggplot(s, percentage_y_axis = TRUE)
p2 <- ptd_create_ggplot(s, percentage_y_axis = TRUE, y_axis_breaks = 0.2)
expect_called(m, 2)
expect_args(m, 1, accuracy = NULL)
expect_args(m, 2, accuracy = 0.2)
})
test_that("it sets the y-axis if y_axis_breaks is provided", {
set.seed(123)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20))
s <- ptd_spc(d, "y", "x")
p1 <- ptd_create_ggplot(s, y_axis_breaks = 1)
expect_true(all(diff(p1$scales$scales[[3]]$breaks) == 1))
p2 <- ptd_create_ggplot(s, y_axis_breaks = 0.5)
expect_true(all(diff(p2$scales$scales[[3]]$breaks) == 0.5))
})
test_that("it adds theme_override to the plot", {
set.seed(123)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20))
s <- ptd_spc(d, "y", "x")
p1 <- ptd_create_ggplot(s)
expect_equal(p1$theme$panel.background$fill, NULL)
p2 <- ptd_create_ggplot(s, theme_override = theme(panel.background = element_rect("black")))
expect_equal(p2$theme$panel.background$fill, "black")
})
test_that("it breaks lines", {
set.seed(123)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20))
withr::with_options(list(ptd_spc.warning_threshold = 10), {
s <- ptd_spc(d, "y", "x", rebase = as.Date("2020-01-01") + 11)
})
p1 <- ptd_create_ggplot(s)
expect_null(p1$mapping$group)
expect_equal(rlang::eval_tidy(p1$layers[[1]]$mapping$group), rep(0:1, each = 10))
expect_equal(rlang::eval_tidy(p1$layers[[2]]$mapping$group), rep(0:1, each = 10))
expect_equal(rlang::eval_tidy(p1$layers[[5]]$mapping$group), rep(0:1, each = 10))
expect_equal(rlang::eval_tidy(p1$layers[[6]]$mapping$group), rep(0:1, each = 10))
p2 <- ptd_create_ggplot(s, break_lines = "limits")
expect_equal(rlang::eval_tidy(p2$layers[[1]]$mapping$group), rep(0:1, each = 10))
expect_equal(rlang::eval_tidy(p2$layers[[2]]$mapping$group), rep(0:1, each = 10))
expect_equal(rlang::eval_tidy(p2$layers[[5]]$mapping$group), rep(0:1, each = 10))
expect_equal(rlang::eval_tidy(p2$layers[[6]]$mapping$group), 0)
p3 <- ptd_create_ggplot(s, break_lines = "process")
expect_equal(rlang::eval_tidy(p3$layers[[1]]$mapping$group), 0)
expect_equal(rlang::eval_tidy(p3$layers[[2]]$mapping$group), 0)
expect_equal(rlang::eval_tidy(p3$layers[[5]]$mapping$group), 0)
expect_equal(rlang::eval_tidy(p3$layers[[6]]$mapping$group), rep(0:1, each = 10))
p4 <- ptd_create_ggplot(s, break_lines = "none")
expect_equal(rlang::eval_tidy(p4$layers[[1]]$mapping$group), 0)
expect_equal(rlang::eval_tidy(p4$layers[[2]]$mapping$group), 0)
expect_equal(rlang::eval_tidy(p4$layers[[5]]$mapping$group), 0)
expect_equal(rlang::eval_tidy(p4$layers[[6]]$mapping$group), 0)
})
test_that("it sets the colour of the points based on the type", {
m <- mock()
stub(ptd_create_ggplot, "scale_colour_manual", m)
set.seed(123)
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20))
colours_neutal <- list(
common_cause = "#7B7D7D", # grey
special_cause_neutral = "#361475" # purple
)
colours_otherwise <- list(
common_cause = "#7B7D7D", # grey
special_cause_improvement = "#289de0", # blue
special_cause_concern = "#fab428" # orange
)
# case 1: improvement_direction = neutral
s1 <- ptd_spc(d, "y", "x", improvement_direction = "neutral")
p1 <- ptd_create_ggplot(s1)
# case 2: improvement_direction = "increase"
s2 <- ptd_spc(d, "y", "x", improvement_direction = "increase")
p2 <- ptd_create_ggplot(s2)
# case 3: improvement_direction = "decrease"
s3 <- ptd_spc(d, "y", "x", improvement_direction = "decrease")
p3 <- ptd_create_ggplot(s3)
expect_called(m, 3)
expect_args(m, 1, values = colours_neutal, labels = ptd_title_case)
expect_args(m, 2, values = colours_otherwise, labels = ptd_title_case)
})
test_that("it sets the main title correctly", {
d <- data.frame(x = as.Date("2020-01-01") + 1:20, y = rnorm(20), z = rnorm(20))
s <- ptd_spc(d, "y", "x")
p1 <- ptd_create_ggplot(s)
expect_equal(p1$labels$title, "SPC Chart of Y, starting 02/01/2020")
p2 <- ptd_create_ggplot(s, main_title = "Thing")
expect_equal(p2$labels$title, "Thing")
})
test_that("a plot with short rebase group has a warning caption", {
d <- data.frame(x = as.Date("2020-01-01") + 1:40, y = rnorm(40))
s1 <- ptd_spc(d, "y", "x", rebase = as.Date("2020-01-20")) # rebase at midpoint, no short groups
s2 <- suppressWarnings(ptd_spc(d, "y", "x", rebase = as.Date("2020-02-02"))) # rebase close to end of points
p1 <- ptd_create_ggplot(s1)
expect_equal(p1$labels$caption, NULL)
p2 <- ptd_create_ggplot(s2)
expect_equal(
p2$labels$caption,
paste0(
"Some trial limits created by groups of fewer than 12 points exist. \n",
"These will become more reliable as more data is added."
)
)
})
test_that("it doesn't add icons if icons_position is 'none'", {
m <- mock()
stub(ptd_create_ggplot, "geom_ptd_icon", m)
set.seed(123)
d <- data.frame(
x = as.Date("2020-01-01") + 1:20,
y = rnorm(20)
)
s1 <- ptd_spc(d, "y", "x", target = 0.5)
p1 <- ptd_create_ggplot(s1, icons_position = "top right")
p2 <- ptd_create_ggplot(s1, icons_position = "none")
expect_called(m, 1)
})
# plot() ----
test_that("it calls ptd_create_ggplot()", {
set.seed(123)
s <- ptd_spc(
data.frame(
x = Sys.Date() + 1:20,
y = rnorm(20)
),
"y", "x"
)
m <- mock()
stub(plot.ptd_spc_df, "ptd_create_ggplot", m)
stub(plot.ptd_spc_df, "ptd_spc_colours", "colours")
plot(s, main_title = "a", x_axis_label = "b", y_axis_label = "c")
expect_called(m, 1)
expect_args(m, 1, s,
point_size = 4,
percentage_y_axis = FALSE,
main_title = "a",
x_axis_label = "b",
y_axis_label = "c",
fixed_x_axis_multiple = TRUE,
fixed_y_axis_multiple = TRUE,
x_axis_date_format = "%d/%m/%y",
x_axis_breaks = NULL,
y_axis_breaks = NULL,
icons_size = 8L,
icons_position = c("top right", "bottom right", "bottom left", "top left", "none"),
colours = "colours",
theme_override = NULL,
break_lines = "both"
)
})