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#include <format>
#include <string_view>
#include <catch2/catch_all.hpp>
#include "svg_analyzer.h"
#include "test_utilities.h"
TEST_CASE("Node fillcolor",
"Test that the Graphviz `fillcolor` attribute is used to set "
"the `fill` and `fill-opacity` attributes correctly for nodes in the "
"generated SVG") {
const auto shape = GENERATE(filter(
[](std::string_view s) {
return !node_shapes_without_svg_shape.contains(s);
},
from_range(all_node_shapes)));
INFO("Shape: " << shape);
const auto node_rgb_fillcolor =
GENERATE("#000000", "#ffffff", "#ff0000", "#aa0f55");
const auto opacity = GENERATE(0, 200, 255);
const auto node_rgba_fillcolor =
std::format("{}{:02x}", node_rgb_fillcolor, opacity);
INFO("Node fillcolor: " << node_rgba_fillcolor);
auto dot = std::format(
"digraph g1 {{node [shape={} style=filled fillcolor=\"{}\"]; a -> b}}",
shape, node_rgba_fillcolor);
const auto engine = "dot";
auto svg_analyzer = SVGAnalyzer::make_from_dot(dot, engine);
const auto expected_node_fillcolor = [&]() -> const std::string {
if (opacity == 255) {
return node_rgb_fillcolor;
}
if (opacity == 0) {
return "#00000000"; // transparent/none
}
return node_rgba_fillcolor;
}();
for (const auto &graph : svg_analyzer.graphs()) {
for (const auto &node : graph.nodes()) {
if (contains_multiple_shapes_with_different_fill(shape) && opacity != 0) {
// FIXME: these node shapes consists of both a transparent shape and a
// shape with the specified filllcolor which the node fillcolor
// retrieval function cannot yet handle (unless the specified fillcolor
// is also transparent) and will throw an exception for
REQUIRE_THROWS_AS(node.fillcolor(), std::runtime_error);
continue;
}
CHECK(node.fillcolor() == expected_node_fillcolor);
}
}
}
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