tests/testthat/test-add-objects.R

In mpadge/osmplotr: Bespoke Images of 'OpenStreetMap' Data

context ("add-objects")

test_that ("basemap", {
    expect_error (add_osm_objects (), "a non-null map must be provided")
    expect_error (add_osm_objects (NULL), "map must be a ggplot2 object")
    expect_error (
        add_osm_objects (col = 1:4),
        "a non-null map must be provided"
    )
})

test_that ("obj", {
    bbox <- get_bbox (c (-0.13, 51.5, -0.11, 51.52))
    map <- osm_basemap (bbox = bbox, bg = "gray20")
    expect_error (add_osm_objects (map), "obj must be provided")
    expect_error (
        add_osm_objects (map, NULL),
        "obj must be a spatial object"
    )
})

test_that ("col", {
    bbox <- get_bbox (c (-0.13, 51.5, -0.11, 51.52))
    map <- osm_basemap (bbox = bbox, bg = "gray20")
    obj <- london$dat_BNR
    expect_silent (add_osm_objects (map, obj))
    expect_error (
        add_osm_objects (map, obj, col = "a"),
        "Invalid colour: a"
    )
    expect_error (
        add_osm_objects (map, obj, col = -2),
        "Invalid colour: -2"
    )
    expect_silent (add_osm_objects (map, obj, col = NA))
    expect_error (
        add_osm_objects (map, obj, col = NULL),
        "a non-null col must be provided"
    )
})

test_that ("border", {
    bbox <- get_bbox (c (-0.13, 51.5, -0.11, 51.52))
    map <- osm_basemap (bbox = bbox, bg = "gray20")
    obj <- london$dat_BNR
    expect_silent (add_osm_objects (map, obj, border = NULL))
    expect_error (
        add_osm_objects (map, obj, border = "a"),
        "Invalid colour: a"
    )
    expect_error (
        add_osm_objects (map, obj, border = -2),
        "Invalid colour: -2"
    )
    expect_silent (add_osm_objects (map, obj, border = NA))
})

test_that ("size", {
    bbox <- get_bbox (c (-0.13, 51.5, -0.11, 51.52))
    map <- osm_basemap (bbox = bbox, bg = "gray20")
    obj <- london$dat_BNR
    expect_warning (
        add_osm_objects (map, obj, size = NULL),
        "size should be numeric; defaulting to 0"
    )
    expect_warning (
        add_osm_objects (map, obj, size = "a"),
        "size should be numeric; defaulting to 0"
    )
    expect_warning (
        add_osm_objects (map, obj, size = -2),
        "size should be positive; defaulting to 0"
    )
    obj <- london$dat_HP
    expect_warning (
        add_osm_objects (map, obj, size = NULL),
        "size should be numeric; defaulting to 0"
    )
    expect_warning (
        add_osm_objects (map, obj, size = "a"),
        "size should be numeric; defaulting to 0.5"
    )
    expect_warning (
        add_osm_objects (map, obj, size = -2),
        "size should be positive; defaulting to 0.5"
    )
    obj <- london$dat_T
    expect_warning (
        add_osm_objects (map, obj, size = NULL),
        "size should be numeric; defaulting to 0"
    )
    expect_warning (
        add_osm_objects (map, obj, size = "a"),
        "size should be numeric; defaulting to 0.5"
    )
    expect_warning (
        add_osm_objects (map, obj, size = -2),
        "size should be positive; defaulting to 0.5"
    )
})

test_that ("shape", {
    bbox <- get_bbox (c (-0.13, 51.5, -0.11, 51.52))
    map <- osm_basemap (bbox = bbox, bg = "gray20")
    obj <- london$dat_BNR # shape is ignored
    expect_silent (add_osm_objects (map, obj, shape = NULL))
    expect_silent (add_osm_objects (map, obj, shape = "a"))
    expect_silent (add_osm_objects (map, obj, shape = -2))
    obj <- london$dat_HP
    expect_warning (
        add_osm_objects (map, obj, shape = NULL),
        "shape should be numeric; defaulting to 1"
    )
    expect_warning (
        add_osm_objects (map, obj, shape = "a"),
        "shape should be numeric; defaulting to 1"
    )
    expect_warning (
        add_osm_objects (map, obj, shape = -2),
        "shape should be positive; defaulting to 1"
    )
    obj <- london$dat_T
    expect_warning (
        add_osm_objects (map, obj, shape = NULL),
        "shape should be numeric; defaulting to 19"
    )
    expect_warning (
        add_osm_objects (map, obj, shape = "a"),
        "shape should be numeric; defaulting to 19"
    )
    expect_warning (
        add_osm_objects (map, obj, shape = -2),
        "shape should be positive; defaulting to 19"
    )
})