68019a1fb2
git-subtree-dir: third_party/protozero git-subtree-split: d5d8debf1b17c6bb652395957b76cde7787e5377
117 lines
4.1 KiB
C++
117 lines
4.1 KiB
C++
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#include <test.hpp>
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TEST_CASE("read repeated packed double field") {
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// Run these tests twice, the second time we basically move the data
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// one byte down in the buffer. It doesn't matter how the data or buffer
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// is aligned before that, in at least one of these cases the doubles will
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// not be aligned properly. So we test that even in that case the doubles
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// will be extracted properly.
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for (std::string::size_type n = 0; n < 2; ++n) {
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std::string abuffer;
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abuffer.reserve(1000);
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abuffer.append(n, '\0');
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SECTION("empty") {
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abuffer.append(load_data("repeated_packed_double/data-empty"));
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protozero::pbf_reader item{abuffer.data() + n, abuffer.size() - n};
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REQUIRE_FALSE(item.next());
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}
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SECTION("one") {
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abuffer.append(load_data("repeated_packed_double/data-one"));
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protozero::pbf_reader item{abuffer.data() + n, abuffer.size() - n};
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REQUIRE(item.next());
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const auto it_range = item.get_packed_double();
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REQUIRE_FALSE(item.next());
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REQUIRE(*it_range.begin() == Approx(17.34));
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REQUIRE(std::next(it_range.begin()) == it_range.end());
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}
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SECTION("many") {
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abuffer.append(load_data("repeated_packed_double/data-many"));
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protozero::pbf_reader item{abuffer.data() + n, abuffer.size() - n};
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REQUIRE(item.next());
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const auto it_range = item.get_packed_double();
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REQUIRE_FALSE(item.next());
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auto it = it_range.begin();
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REQUIRE(*it++ == Approx(17.34));
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REQUIRE(*it++ == Approx( 0.0));
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REQUIRE(*it++ == Approx( 1.0));
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REQUIRE(*it++ == std::numeric_limits<double>::min());
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REQUIRE(*it++ == std::numeric_limits<double>::max());
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REQUIRE(it == it_range.end());
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it = it_range.begin();
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auto it2 = it + 1;
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REQUIRE(it2 > it);
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REQUIRE(it < it2);
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REQUIRE(it <= it_range.begin());
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REQUIRE(it >= it_range.begin());
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REQUIRE(*it2 == Approx(0.0));
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auto it3 = 1 + it;
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REQUIRE(*it3 == Approx(0.0));
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auto it4 = it2 - 1;
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REQUIRE(*it4 == Approx(17.34));
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it4 += 2;
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REQUIRE(*it4 == Approx(1.0));
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it4 -= 2;
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REQUIRE(*it4 == Approx(17.34));
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it4 += 2;
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REQUIRE(*it4 == Approx(1.0));
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REQUIRE(*it4-- == Approx(1.0));
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REQUIRE(*it4 == Approx(0.0));
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REQUIRE(*--it4 == Approx(17.34));
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REQUIRE(it4[0] == Approx(17.34));
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REQUIRE(it4[1] == Approx(0.0));
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REQUIRE(std::distance(it_range.begin(), it_range.end()) == 5);
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REQUIRE(it_range.end() - it_range.begin() == 5);
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REQUIRE(it_range.begin() - it_range.end() == -5);
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}
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SECTION("end_of_buffer") {
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abuffer.append(load_data("repeated_packed_double/data-many"));
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for (std::string::size_type i = 1; i < abuffer.size() - n; ++i) {
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protozero::pbf_reader item{abuffer.data() + n, i};
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REQUIRE(item.next());
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REQUIRE_THROWS_AS(item.get_packed_double(), const protozero::end_of_buffer_exception&);
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}
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}
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}
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}
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TEST_CASE("write repeated packed double field") {
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std::string buffer;
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protozero::pbf_writer pw{buffer};
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SECTION("empty") {
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const double data[] = { 17.34 };
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pw.add_packed_double(1, std::begin(data), std::begin(data) /* !!!! */);
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REQUIRE(buffer == load_data("repeated_packed_double/data-empty"));
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}
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SECTION("one") {
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const double data[] = { 17.34 };
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pw.add_packed_double(1, std::begin(data), std::end(data));
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REQUIRE(buffer == load_data("repeated_packed_double/data-one"));
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}
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SECTION("many") {
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const double data[] = { 17.34, 0.0, 1.0, std::numeric_limits<double>::min(), std::numeric_limits<double>::max() };
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pw.add_packed_double(1, std::begin(data), std::end(data));
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REQUIRE(buffer == load_data("repeated_packed_double/data-many"));
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}
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}
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