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tests for longest-common-subsequence-based diff code (#2662)

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This commit is contained in:
Tim Sylvester
2024-08-01 14:17:05 -07:00
committed by GitHub
parent 072aa32e8b
commit 4e6d40dc77
1 changed files with 113 additions and 0 deletions
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test/renderer/style_diff.test.cpp Normal file
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#include <mbgl/test/util.hpp>
#include <mbgl/renderer/style_diff.hpp>
#include <mbgl/style/layer_impl.hpp>
using namespace mbgl;
using namespace mbgl::style;
struct TestLayerImpl : style::Layer::Impl {
TestLayerImpl(std::string layerID, std::string sourceID)
: Impl(std::move(layerID), std::move(sourceID)) {}
bool hasLayoutDifference(const Layer::Impl&) const override { return false; }
void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override {}
DECLARE_LAYER_TYPE_INFO;
};
const LayerTypeInfo* TestLayerImpl::staticTypeInfo() noexcept {
const static LayerTypeInfo typeInfo{"test",
LayerTypeInfo::Source::NotRequired,
LayerTypeInfo::Pass3D::NotRequired,
LayerTypeInfo::Layout::NotRequired,
LayerTypeInfo::FadingTiles::NotRequired,
LayerTypeInfo::CrossTileIndex::NotRequired,
LayerTypeInfo::TileKind::NotRequired};
return &typeInfo;
}
TEST(StyleDiff, Empty) {
auto a = makeMutable<std::vector<ImmutableLayer>>();
auto b = makeMutable<std::vector<ImmutableLayer>>();
auto diff = diffLayers(Immutable<std::vector<ImmutableLayer>>(std::move(a)),
Immutable<std::vector<ImmutableLayer>>(std::move(b)));
ASSERT_TRUE(diff.added.empty());
ASSERT_TRUE(diff.removed.empty());
ASSERT_TRUE(diff.changed.empty());
}
TEST(StyleDiff, Add) {
auto l1 = Immutable<TestLayerImpl>(makeMutable<TestLayerImpl>("id-1", "src-1"));
auto l2 = Immutable<TestLayerImpl>(makeMutable<TestLayerImpl>("id-2", "src-2"));
auto a = makeMutable<std::vector<ImmutableLayer>>();
a->push_back(l1);
auto b = makeMutable<std::vector<ImmutableLayer>>();
b->push_back(l1);
b->push_back(l2);
auto diff = diffLayers(Immutable<std::vector<ImmutableLayer>>(std::move(a)),
Immutable<std::vector<ImmutableLayer>>(std::move(b)));
ASSERT_EQ(1, diff.added.size());
ASSERT_EQ(0, diff.removed.size());
ASSERT_EQ(0, diff.changed.size());
}
TEST(StyleDiff, Remove) {
auto l1 = Immutable<TestLayerImpl>(makeMutable<TestLayerImpl>("id-1", "src-1"));
auto l2 = Immutable<TestLayerImpl>(makeMutable<TestLayerImpl>("id-2", "src-2"));
auto a = makeMutable<std::vector<ImmutableLayer>>();
a->push_back(l1);
a->push_back(l2);
auto b = makeMutable<std::vector<ImmutableLayer>>();
b->push_back(l1);
auto diff = diffLayers(Immutable<std::vector<ImmutableLayer>>(std::move(a)),
Immutable<std::vector<ImmutableLayer>>(std::move(b)));
ASSERT_EQ(0, diff.added.size());
ASSERT_EQ(1, diff.removed.size());
ASSERT_EQ(0, diff.changed.size());
}
// Different identical instances show up as changed
TEST(StyleDiff, Compare) {
auto a = makeMutable<std::vector<ImmutableLayer>>();
a->push_back(makeMutable<TestLayerImpl>("id-1", "src-1"));
a->push_back(makeMutable<TestLayerImpl>("id-2", "src-2"));
auto b = makeMutable<std::vector<ImmutableLayer>>();
b->push_back(makeMutable<TestLayerImpl>("id-1", "src-1"));
b->push_back(makeMutable<TestLayerImpl>("id-2", "src-2"));
auto diff = diffLayers(Immutable<std::vector<ImmutableLayer>>(std::move(a)),
Immutable<std::vector<ImmutableLayer>>(std::move(b)));
ASSERT_EQ(0, diff.added.size());
ASSERT_EQ(0, diff.removed.size());
ASSERT_EQ(2, diff.changed.size());
}
// Order change shows up as add and remove
TEST(StyleDiff, Order) {
auto l1 = Immutable<TestLayerImpl>(makeMutable<TestLayerImpl>("id-1", "src-1"));
auto l2 = Immutable<TestLayerImpl>(makeMutable<TestLayerImpl>("id-2", "src-2"));
auto a = makeMutable<std::vector<ImmutableLayer>>();
a->push_back(l1);
a->push_back(l2);
auto b = makeMutable<std::vector<ImmutableLayer>>();
b->push_back(l2);
b->push_back(l1);
auto diff = diffLayers(Immutable<std::vector<ImmutableLayer>>(std::move(a)),
Immutable<std::vector<ImmutableLayer>>(std::move(b)));
ASSERT_EQ(1, diff.added.size());
ASSERT_EQ(1, diff.removed.size());
ASSERT_EQ(0, diff.changed.size());
}