TEST(Descriptor, WriteAndReadSucceedsForValidDescriptor) {
Descriptor expected;
expected.num_partitions = 1;
expected.map_type = Descriptor::TYPE_MAP;
ASSERT_NO_THROW(expected.writeToDirectory(TMPDIR));
Descriptor actual = Descriptor::readFromDirectory(TMPDIR);
ASSERT_EQ(expected.map_type, actual.map_type);
ASSERT_EQ(expected.num_partitions, actual.num_partitions);
ASSERT_EQ(expected.major_version, actual.major_version);
ASSERT_EQ(expected.minor_version, actual.minor_version);
expected.map_type = Descriptor::TYPE_IMMUTABLE_MAP;
ASSERT_NO_THROW(expected.writeToDirectory(TMPDIR));
actual = Descriptor::readFromDirectory(TMPDIR);
ASSERT_EQ(expected.map_type, actual.map_type);
ASSERT_EQ(expected.num_partitions, actual.num_partitions);
ASSERT_EQ(expected.major_version, actual.major_version);
ASSERT_EQ(expected.minor_version, actual.minor_version);
}
TEST(Descriptor, TryReadReturnsTrueIfDirectoryContainsDescriptor) {
Descriptor descriptor;
descriptor.num_partitions = 1;
descriptor.map_type = Descriptor::TYPE_MAP;
descriptor.writeToDirectory(TMPDIR);
Descriptor read_descriptor;
ASSERT_TRUE(Descriptor::tryReadFromDirectory(TMPDIR, &read_descriptor));
ASSERT_EQ(descriptor.map_type, read_descriptor.map_type);
ASSERT_EQ(descriptor.num_partitions, read_descriptor.num_partitions);
ASSERT_EQ(descriptor.major_version, read_descriptor.major_version);
ASSERT_EQ(descriptor.minor_version, read_descriptor.minor_version);
}
TEST(Descriptor, WriteThrowsIfMapTypeIsZero) {
Descriptor descriptor;
descriptor.map_type = 0;
ASSERT_THROW(descriptor.writeToDirectory(TMPDIR), mt::AssertionError);
}
TEST(Descriptor, WriteThrowsIfNumPartitionsIsZero) {
Descriptor descriptor;
descriptor.num_partitions = 0;
ASSERT_THROW(descriptor.writeToDirectory(TMPDIR), mt::AssertionError);
}