tests/testthat/test-dragon.R

In BastiHz/fractalplotr: Plot Beautiful Fractals with R

# Copyright (C) 2020 Sebastian Henz
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see https://www.gnu.org/licenses/.


test_that("dragon is folded as expected", {
    d <- dragon_curve(3)
    m <- matrix(
        c(
            0, 0,
            1, 0,
            1, 1,
            0, 1,
            0, 2,
            -1, 2,
            -1, 1,
            -2, 1,
            -2, 2
        ),
        ncol = 2,
        byrow = TRUE
    )
    colnames(m) <- c("x", "y")
    class(m) <- c("dragon_curve", class(m))
    expect_identical(d, m)
})