gnuplotpp/tests/gnuplot_backend_test.cpp at main · watsonryan/gnuplotpp · GitHub

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#include "gnuplotpp/gnuplot_backend.hpp"

#include "gnuplotpp/plot.hpp"

#include "gnuplotpp/presets.hpp"

#include <cassert>

#include <filesystem>

#include <fstream>

#include <string>

#include <vector>

namespace {

std::string read_file(const std::filesystem::path& path) {

std::ifstream in(path);

return std::string((std::istreambuf_iterator<char>(in)), std::istreambuf_iterator<char>());

}

} // namespace

int main() {

using namespace gnuplotpp;

FigureSpec spec;

spec.preset = Preset::IEEE_DoubleColumn;

apply_preset_defaults(spec);

spec.rows = 1;

spec.cols = 2;

spec.formats = {OutputFormat::Pdf};

spec.export_policy.drop_line_alpha_for_vector = false;

Figure fig(spec);

AxesSpec ax0;

ax0.title = "Position Error";

ax0.xlabel = "t [s]";

ax0.ylabel = "||e_p|| [m]";

ax0.grid = true;

AxesSpec ax1 = ax0;

ax1.title = "Velocity Error";

ax1.ylabel = "||e_v|| [m/s]";

fig.axes(0, 0).set(ax0);

fig.axes(0, 1).set(ax1);

const std::vector<double> t{0.0, 1.0, 2.0};

const std::vector<double> ep{2.0, 1.0, 0.5};

const std::vector<double> ev{0.4, 0.3, 0.2};

const std::vector<double> ep_mc{1.8, 1.1, 0.6};

fig.axes(0, 0).add_series(SeriesSpec{.label = "SRIF"}, t, ep);

fig.axes(0, 0).add_series(SeriesSpec{.label = "MC",

.has_line_width = true,

.line_width_pt = 0.6,

.has_color = true,

.color = "#000000",

.has_opacity = true,

.opacity = 0.25},

ep_mc);

fig.axes(0, 1).add_series(SeriesSpec{.label = "SRIF"}, t, ev);

const auto out_dir = std::filesystem::temp_directory_path() / "gnuplotpp_backend_test";

std::filesystem::remove_all(out_dir);

fig.set_backend(make_gnuplot_backend("__gnuplot_missing__"));

const auto result = fig.save(out_dir);

assert(!result.ok);

assert(result.status == RenderStatus::ExternalToolMissing);

assert(std::filesystem::exists(result.script_path));

const auto script = read_file(result.script_path);

assert(script.find("set multiplot layout 1,2") != std::string::npos);

assert(script.find("set terminal pdfcairo") != std::string::npos);

assert(script.find("set monochrome") == std::string::npos);

assert(script.find("dt 1") != std::string::npos);

assert(script.find("lc rgb '#bf000000'") != std::string::npos);

assert(script.find("plot") != std::string::npos);

const auto data0 = out_dir / "tmp" / "ax0_series0.dat";

const auto data_text = read_file(data0);

assert(data_text.find("0.0000000000000000e+00") != std::string::npos);

assert(data_text.find("2.0000000000000000e+00") != std::string::npos);

std::filesystem::remove_all(out_dir);

return 0;

}

gnuplotpp/tests/gnuplot_backend_test.cpp at main · watsonryan/gnuplotpp · GitHub

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