test: extend coverage of testPortal

tests/testPortal.cpp

@@ -318,3 +318,90 @@ VF_TEST(builtFrameCarvesItsOwnApproachOutOfTheTerrain) {
             for (int gz = 0; gz < 10; ++gz)
                 world.setBlock(gx, gy, gz, Block::Netherrack);
 
+    PortalFrame frame;
+    frame.origin = {4, 42, 5};
+    frame.width = 2;
+    frame.height = 3;
+    frame.alongX = true;
+    frame.dimension = DimensionId::Nether;
+
+    CHECK(PortalScan::siteUsable(world, frame));
+    PortalScan::buildFrame(world, frame);
+
+    CHECK(PortalScan::intact(world, frame));
+    CHECK(PortalScan::interiorClear(world, frame));
+    CHECK_EQ(world.blockAt(4, 42, 4), Block::Air);
+    CHECK_EQ(world.blockAt(5, 42, 6), Block::Air);
+    CHECK_EQ(world.blockAt(4, 41, 4), Block::Obsidian);
+    CHECK_EQ(world.blockAt(4, 41, 6), Block::Obsidian);
+    CHECK_EQ(world.blockAt(0, 42, 0), Block::Netherrack);
+    CHECK_EQ(PortalScan::light(world, frame), 6);
+}
+
+VF_TEST(bedrockMakesASiteUnusable) {
+    World world;
+    PortalFrame frame;
+    frame.origin = {0, 2, 0};
+    frame.width = 2;
+    frame.height = 3;
+    frame.alongX = true;
+
+    CHECK(PortalScan::siteUsable(world, frame));
+    world.setBlock(0, 1, 0, Block::Bedrock);
+    CHECK(!PortalScan::siteUsable(world, frame));
+}
+
+VF_TEST(endPortalIgnitesOnlyOnceEveryEyeIsSeated) {
+    DimensionSet dimensions(121u);
+    PortalNetwork network(dimensions);
+    Vec3i center{40, 60, 40};
+
+    CHECK_EQ(network.buildEndFrame(DimensionId::End, center), PortalNetwork::endFrameSlots);
+    const World& world = dimensions.end().world();
+    CHECK_EQ(world.blockAt(38, 60, 40), Block::EndPortalFrame);
+    CHECK_EQ(world.blockAt(40, 60, 42), Block::EndPortalFrame);
+    CHECK_EQ(world.blockAt(38, 60, 38), Block::Air);   // corners stay empty
+    CHECK_EQ(world.blockAt(42, 60, 42), Block::Air);
+    CHECK_EQ(world.blockAt(40, 60, 40), Block::Air);
+
+    const int offsetX[PortalNetwork::endFrameSlots] = {-2, -2, -2, 2, 2, 2, -1, 0, 1, -1, 0, 1};
+    const int offsetZ[PortalNetwork::endFrameSlots] = {-1, 0, 1, -1, 0, 1, -2, -2, -2, 2, 2, 2};
+
+    for (int slot = 0; slot < PortalNetwork::endFrameSlots - 1; ++slot) {
+        Vec3i socket{center.x + offsetX[slot], center.y, center.z + offsetZ[slot]};
+        CHECK(network.insertEndEye(DimensionId::End, socket));
+        CHECK(network.hasEndEye(DimensionId::End, socket));
+        CHECK_EQ(network.endEyeCount(DimensionId::End, center), slot + 1);
+        CHECK(!network.endFrameComplete(DimensionId::End, center));
+        CHECK_EQ(world.blockAt(center.x, center.y, center.z), Block::Air);
+    }
+
+    Vec3i last{center.x + offsetX[11], center.y, center.z + offsetZ[11]};
+    CHECK(network.insertEndEye(DimensionId::End, last));
+    CHECK(network.endFrameComplete(DimensionId::End, center));
+
+    int portalCells = 0;
+    for (int dx = -1; dx <= 1; ++dx)
+        for (int dz = -1; dz <= 1; ++dz)
+            if (world.blockAt(center.x + dx, center.y, center.z + dz) == Block::EndPortal)
+                ++portalCells;
+    CHECK_EQ(portalCells, 9);
+}
+
+VF_TEST(endPortalEyesOnlyGoIntoRealFrameBlocks) {
+    DimensionSet dimensions(122u);
+    PortalNetwork network(dimensions);
+    Vec3i center{0, 50, 0};
+    network.buildEndFrame(DimensionId::End, center);
+
+    Vec3i socket{-2, 50, 0};
+    CHECK(network.insertEndEye(DimensionId::End, socket));
+    CHECK(!network.insertEndEye(DimensionId::End, socket));
+    CHECK(!network.insertEndEye(DimensionId::End, {-2, 50, -2}));
+    CHECK(!network.insertEndEye(DimensionId::End, {9, 9, 9}));
+    CHECK_EQ(network.endEyeCount(DimensionId::End, center), 1);
+
+    // The same socket in another dimension is a different socket entirely.
+    CHECK(!network.hasEndEye(DimensionId::Overworld, socket));
+    CHECK(!network.activateEndPortal(DimensionId::End, center));
+}