Update test case for collapse_count and extrusion depth

Author: aothms

tests/test_collapse.cpp

@@ -6,11 +6,24 @@
 TEST(SweepAndCollapse, Same) {
 	// Collapse and Sweep should be each other's reverse
 	auto storage = new chunked_voxel_storage<bit_t>(0., 0., 0., 0.1, 100, 100, 100, 32);
-	storage->Set(make_vec<size_t>( 1U,1U,1U ));
+	auto loc = make_vec<size_t>(1U, 1U, 1U);
+	storage->Set(loc);
+	
 	sweep s;
 	collapse c;
+	collapse_count cc;
+	
 	auto swept = s(storage, 0, 0, 5);
+	ASSERT_EQ(swept->count(), 5);
 	auto result = c(swept, 0, 0, -1);
 	ASSERT_EQ(result->count(), 1);
-	ASSERT_TRUE(result->Get(make_vec<size_t>( 1U,1U,1U )));
+	ASSERT_TRUE(result->Get(loc));
+
+	auto result2 = cc(swept, 0, 0, -1);
+	size_t value;
+	result2->Get(loc, &value);
+	ASSERT_EQ(value, 5);
+	// @nb dz=1 because the extrusion depth is now stored in the voxel value
+	auto swept2 = s(result2, 0, 0, 1);
+	ASSERT_EQ(swept2->count(), 5);
 }