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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
// Unit tests for DataType (and subclasses), Field, and Schema
#include <algorithm>
#include <cctype>
#include <cstdint>
#include <memory>
#include <string>
#include <unordered_set>
#include <vector>
#include <gmock/gmock.h>
#include "arrow/memory_pool.h"
#include "arrow/testing/gtest_util.h"
#include "arrow/testing/util.h"
#include "arrow/type.h"
#include "arrow/type_traits.h"
#include "arrow/util/checked_cast.h"
#include "arrow/util/key_value_metadata.h"
namespace arrow {
using testing::ElementsAre;
using internal::checked_cast;
using internal::checked_pointer_cast;
TEST(TestTypeId, AllTypeIds) {
const auto all_ids = AllTypeIds();
ASSERT_EQ(static_cast<int>(all_ids.size()), Type::MAX_ID);
}
template <typename ReprFunc>
void CheckTypeIdReprs(ReprFunc&& repr_func, bool expect_uppercase) {
std::unordered_set<std::string> unique_reprs;
const auto all_ids = AllTypeIds();
for (const auto id : all_ids) {
std::string repr = repr_func(id);
ASSERT_TRUE(std::all_of(repr.begin(), repr.end(),
[=](const char c) {
return c == '_' || std::isdigit(c) ||
(expect_uppercase ? std::isupper(c)
: std::islower(c));
}))
<< "Invalid type id repr: '" << repr << "'";
unique_reprs.insert(std::move(repr));
}
// No duplicates
ASSERT_EQ(unique_reprs.size(), all_ids.size());
}
TEST(TestTypeId, ToString) {
// Should be all uppercase strings (corresponding to the enum member names)
CheckTypeIdReprs([](Type::type id) { return internal::ToString(id); },
/* expect_uppercase=*/true);
}
TEST(TestTypeId, ToTypeName) {
// Should be all lowercase strings (corresponding to TypeClass::type_name())
CheckTypeIdReprs([](Type::type id) { return internal::ToTypeName(id); },
/* expect_uppercase=*/false);
}
TEST(TestField, Basics) {
Field f0("f0", int32());
Field f0_nn("f0", int32(), false);
ASSERT_EQ(f0.name(), "f0");
ASSERT_EQ(f0.type()->ToString(), int32()->ToString());
ASSERT_TRUE(f0.nullable());
ASSERT_FALSE(f0_nn.nullable());
}
TEST(TestField, ToString) {
auto metadata = key_value_metadata({"foo", "bar"}, {"bizz", "buzz"});
auto f0 = field("f0", int32(), false, metadata);
std::string result = f0->ToString(/*print_metadata=*/true);
std::string expected = R"(f0: int32 not null
-- metadata --
foo: bizz
bar: buzz)";
ASSERT_EQ(expected, result);
result = f0->ToString();
expected = "f0: int32 not null";
ASSERT_EQ(expected, result);
}
TEST(TestField, Equals) {
auto meta1 = key_value_metadata({{"a", "1"}, {"b", "2"}});
// Different from meta1
auto meta2 = key_value_metadata({{"a", "1"}, {"b", "3"}});
// Equal to meta1, though in different order
auto meta3 = key_value_metadata({{"b", "2"}, {"a", "1"}});
Field f0("f0", int32());
Field f0_nn("f0", int32(), false);
Field f0_other("f0", int32());
Field f0_with_meta1("f0", int32(), true, meta1);
Field f0_with_meta2("f0", int32(), true, meta2);
Field f0_with_meta3("f0", int32(), true, meta3);
AssertFieldEqual(f0, f0_other);
AssertFieldNotEqual(f0, f0_nn);
AssertFieldNotEqual(f0, f0_with_meta1, /*check_metadata=*/true);
AssertFieldNotEqual(f0_with_meta1, f0_with_meta2, /*check_metadata=*/true);
AssertFieldEqual(f0_with_meta1, f0_with_meta3, /*check_metadata=*/true);
AssertFieldEqual(f0, f0_with_meta1);
AssertFieldEqual(f0, f0_with_meta2);
AssertFieldEqual(f0_with_meta1, f0_with_meta2);
// operator==(), where check_metadata == false
ASSERT_EQ(f0, f0_other);
ASSERT_NE(f0, f0_nn);
ASSERT_EQ(f0, f0_with_meta1);
ASSERT_EQ(f0_with_meta1, f0_with_meta2);
}
#define ASSERT_COMPATIBLE_IMPL(NAME, TYPE, PLURAL) \
void Assert##NAME##Compatible(const TYPE& left, const TYPE& right) { \
ASSERT_TRUE(left.IsCompatibleWith(right)) \
<< PLURAL << left.ToString() << "' and '" << right.ToString() \
<< "' should be compatible"; \
} \
\
void Assert##NAME##Compatible(const std::shared_ptr<TYPE>& left, \
const std::shared_ptr<TYPE>& right) { \
ASSERT_NE(left, nullptr); \
ASSERT_NE(right, nullptr); \
Assert##NAME##Compatible(*left, *right); \
} \
\
void Assert##NAME##NotCompatible(const TYPE& left, const TYPE& right) { \
ASSERT_FALSE(left.IsCompatibleWith(right)) \
<< PLURAL << left.ToString() << "' and '" << right.ToString() \
<< "' should not be compatible"; \
} \
\
void Assert##NAME##NotCompatible(const std::shared_ptr<TYPE>& left, \
const std::shared_ptr<TYPE>& right) { \
ASSERT_NE(left, nullptr); \
ASSERT_NE(right, nullptr); \
Assert##NAME##NotCompatible(*left, *right); \
}
ASSERT_COMPATIBLE_IMPL(Field, Field, "fields")
#undef ASSERT_COMPATIBLE_IMPL
TEST(TestField, IsCompatibleWith) {
auto meta1 = key_value_metadata({{"a", "1"}, {"b", "2"}});
// Different from meta1
auto meta2 = key_value_metadata({{"a", "1"}, {"b", "3"}});
// Equal to meta1, though in different order
auto meta3 = key_value_metadata({{"b", "2"}, {"a", "1"}});
Field f0("f0", int32());
Field f0_nn("f0", int32(), false);
Field f0_nt("f0", null());
Field f0_other("f0", int32());
Field f0_with_meta1("f0", int32(), true, meta1);
Field f0_with_meta2("f0", int32(), true, meta2);
Field f0_with_meta3("f0", int32(), true, meta3);
Field other("other", int64());
AssertFieldCompatible(f0, f0_other);
AssertFieldCompatible(f0, f0_with_meta1);
AssertFieldCompatible(f0, f0_nn);
AssertFieldCompatible(f0, f0_nt);
AssertFieldCompatible(f0_nt, f0_with_meta1);
AssertFieldCompatible(f0_with_meta1, f0_with_meta2);
AssertFieldCompatible(f0_with_meta1, f0_with_meta3);
AssertFieldNotCompatible(f0, other);
}
TEST(TestField, TestMetadataConstruction) {
auto metadata = key_value_metadata({"foo", "bar"}, {"bizz", "buzz"});
auto metadata2 = metadata->Copy();
auto f0 = field("f0", int32(), true, metadata);
auto f1 = field("f0", int32(), true, metadata2);
ASSERT_TRUE(metadata->Equals(*f0->metadata()));
AssertFieldEqual(f0, f1);
}
TEST(TestField, TestWithMetadata) {
auto metadata = key_value_metadata({"foo", "bar"}, {"bizz", "buzz"});
auto f0 = field("f0", int32());
auto f1 = field("f0", int32(), true, metadata);
std::shared_ptr<Field> f2 = f0->WithMetadata(metadata);
AssertFieldEqual(f0, f2);
AssertFieldNotEqual(f0, f2, /*check_metadata=*/true);
AssertFieldEqual(f1, f2);
AssertFieldEqual(f1, f2, /*check_metadata=*/true);
// Ensure pointer equality for zero-copy
ASSERT_EQ(metadata.get(), f1->metadata().get());
}
TEST(TestField, TestWithMergedMetadata) {
auto metadata = key_value_metadata({"foo", "bar"}, {"bizz", "buzz"});
auto f0 = field("f0", int32(), true, metadata);
auto f1 = field("f0", int32());
auto metadata2 = key_value_metadata({"bar", "baz"}, {"bozz", "bazz"});
auto f2 = f0->WithMergedMetadata(metadata2);
auto expected = field("f0", int32(), true, metadata->Merge(*metadata2));
AssertFieldEqual(expected, f2);
auto f3 = f1->WithMergedMetadata(metadata2);
expected = field("f0", int32(), true, metadata2);
AssertFieldEqual(expected, f3);
}
TEST(TestField, TestRemoveMetadata) {
auto metadata = key_value_metadata({"foo", "bar"}, {"bizz", "buzz"});
auto f0 = field("f0", int32());
auto f1 = field("f0", int32(), true, metadata);
std::shared_ptr<Field> f2 = f1->RemoveMetadata();
ASSERT_EQ(f2->metadata(), nullptr);
}
TEST(TestField, TestEmptyMetadata) {
// Empty metadata should be equivalent to no metadata at all
auto metadata1 = key_value_metadata({});
auto metadata2 = key_value_metadata({"foo"}, {"foo value"});
auto f0 = field("f0", int32());
auto f1 = field("f0", int32(), true, metadata1);
auto f2 = field("f0", int32(), true, metadata2);
AssertFieldEqual(f0, f1);
AssertFieldEqual(f0, f2);
AssertFieldEqual(f0, f1, /*check_metadata =*/true);
AssertFieldNotEqual(f0, f2, /*check_metadata =*/true);
}
TEST(TestField, TestFlatten) {
auto metadata = key_value_metadata({"foo", "bar"}, {"bizz", "buzz"});
auto f0 = field("f0", int32(), true /* nullable */, metadata);
auto vec = f0->Flatten();
ASSERT_EQ(vec.size(), 1);
AssertFieldEqual(vec[0], f0);
auto f1 = field("f1", float64(), false /* nullable */);
auto ff = field("nest", struct_({f0, f1}));
vec = ff->Flatten();
ASSERT_EQ(vec.size(), 2);
auto expected0 = field("nest.f0", int32(), true /* nullable */, metadata);
// nullable parent implies nullable flattened child
auto expected1 = field("nest.f1", float64(), true /* nullable */);
AssertFieldEqual(vec[0], expected0);
AssertFieldEqual(vec[1], expected1);
ff = field("nest", struct_({f0, f1}), false /* nullable */);
vec = ff->Flatten();
ASSERT_EQ(vec.size(), 2);
expected0 = field("nest.f0", int32(), true /* nullable */, metadata);
expected1 = field("nest.f1", float64(), false /* nullable */);
AssertFieldEqual(vec[0], expected0);
AssertFieldEqual(vec[1], expected1);
}
TEST(TestField, TestReplacement) {
auto metadata = key_value_metadata({"foo", "bar"}, {"bizz", "buzz"});
auto f0 = field("f0", int32(), true, metadata);
auto fzero = f0->WithType(utf8());
auto f1 = f0->WithName("f1");
AssertFieldNotEqual(f0, fzero);
AssertFieldNotCompatible(f0, fzero);
AssertFieldNotEqual(fzero, f1);
AssertFieldNotCompatible(fzero, f1);
AssertFieldNotEqual(f1, f0);
AssertFieldNotCompatible(f1, f0);
ASSERT_EQ(fzero->name(), "f0");
AssertTypeEqual(fzero->type(), utf8());
ASSERT_TRUE(fzero->metadata()->Equals(*metadata));
ASSERT_EQ(f1->name(), "f1");
AssertTypeEqual(f1->type(), int32());
ASSERT_TRUE(f1->metadata()->Equals(*metadata));
}
TEST(TestField, TestMerge) {
auto metadata1 = key_value_metadata({"foo"}, {"v"});
auto metadata2 = key_value_metadata({"bar"}, {"v"});
{
// different name.
ASSERT_RAISES(Invalid, field("f0", int32())->MergeWith(field("f1", int32())));
}
{
// Same type.
auto f1 = field("f", int32())->WithMetadata(metadata1);
auto f2 = field("f", int32())->WithMetadata(metadata2);
std::shared_ptr<Field> result;
ASSERT_OK_AND_ASSIGN(result, f1->MergeWith(f2));
ASSERT_TRUE(result->Equals(f1));
ASSERT_OK_AND_ASSIGN(result, f2->MergeWith(f1));
ASSERT_TRUE(result->Equals(f2));
}
{
// promote_nullability == false
auto f = field("f", int32());
auto null_field = field("f", null());
Field::MergeOptions options;
options.promote_nullability = false;
ASSERT_RAISES(Invalid, f->MergeWith(null_field, options));
ASSERT_RAISES(Invalid, null_field->MergeWith(f, options));
// Also rejects fields with different nullability.
ASSERT_RAISES(Invalid,
f->WithNullable(true)->MergeWith(f->WithNullable(false), options));
}
{
// promote_nullability == true; merge with a null field.
Field::MergeOptions options;
options.promote_nullability = true;
auto f = field("f", int32())->WithNullable(false)->WithMetadata(metadata1);
auto null_field = field("f", null())->WithMetadata(metadata2);
std::shared_ptr<Field> result;
ASSERT_OK_AND_ASSIGN(result, f->MergeWith(null_field, options));
ASSERT_TRUE(result->Equals(f->WithNullable(true)->WithMetadata(metadata1)));
ASSERT_OK_AND_ASSIGN(result, null_field->MergeWith(f, options));
ASSERT_TRUE(result->Equals(f->WithNullable(true)->WithMetadata(metadata2)));
}
{
// promote_nullability == true; merge a nullable field and a in-nullable field.
Field::MergeOptions options;
options.promote_nullability = true;
auto f1 = field("f", int32())->WithNullable(false);
auto f2 = field("f", int32())->WithNullable(true);
std::shared_ptr<Field> result;
ASSERT_OK_AND_ASSIGN(result, f1->MergeWith(f2, options));
ASSERT_TRUE(result->Equals(f1->WithNullable(true)));
ASSERT_OK_AND_ASSIGN(result, f2->MergeWith(f1, options));
ASSERT_TRUE(result->Equals(f2));
}
}
TEST(TestFieldPath, Basics) {
auto f0 = field("alpha", int32());
auto f1 = field("beta", int32());
auto f2 = field("alpha", int32());
auto f3 = field("beta", int32());
Schema s({f0, f1, f2, f3});
// retrieving a field with single-element FieldPath is equivalent to Schema::field
for (int index = 0; index < s.num_fields(); ++index) {
ASSERT_OK_AND_EQ(s.field(index), FieldPath({index}).Get(s));
}
EXPECT_RAISES_WITH_MESSAGE_THAT(Invalid,
testing::HasSubstr("empty indices cannot be traversed"),
FieldPath().Get(s));
EXPECT_RAISES_WITH_MESSAGE_THAT(IndexError, testing::HasSubstr("index out of range"),
FieldPath({s.num_fields() * 2}).Get(s));
}
TEST(TestFieldRef, Basics) {
auto f0 = field("alpha", int32());
auto f1 = field("beta", int32());
auto f2 = field("alpha", int32());
auto f3 = field("beta", int32());
Schema s({f0, f1, f2, f3});
// lookup by index returns Indices{index}
for (int index = 0; index < s.num_fields(); ++index) {
EXPECT_THAT(FieldRef(index).FindAll(s), ElementsAre(FieldPath{index}));
}
// out of range index results in a failure to match
EXPECT_THAT(FieldRef(s.num_fields() * 2).FindAll(s), ElementsAre());
// lookup by name returns the Indices of both matching fields
EXPECT_THAT(FieldRef("alpha").FindAll(s), ElementsAre(FieldPath{0}, FieldPath{2}));
EXPECT_THAT(FieldRef("beta").FindAll(s), ElementsAre(FieldPath{1}, FieldPath{3}));
}
TEST(TestFieldRef, FromDotPath) {
ASSERT_OK_AND_EQ(FieldRef("alpha"), FieldRef::FromDotPath(R"(.alpha)"));
ASSERT_OK_AND_EQ(FieldRef("", ""), FieldRef::FromDotPath(R"(..)"));
ASSERT_OK_AND_EQ(FieldRef(2), FieldRef::FromDotPath(R"([2])"));
ASSERT_OK_AND_EQ(FieldRef("beta", 3), FieldRef::FromDotPath(R"(.beta[3])"));
ASSERT_OK_AND_EQ(FieldRef(5, "gamma", "delta", 7),
FieldRef::FromDotPath(R"([5].gamma.delta[7])"));
ASSERT_OK_AND_EQ(FieldRef("hello world"), FieldRef::FromDotPath(R"(.hello world)"));
ASSERT_OK_AND_EQ(FieldRef(R"([y]\tho.\)"), FieldRef::FromDotPath(R"(.\[y\]\\tho\.\)"));
ASSERT_OK_AND_EQ(FieldRef(), FieldRef::FromDotPath(R"()"));
ASSERT_RAISES(Invalid, FieldRef::FromDotPath(R"(alpha)"));
ASSERT_RAISES(Invalid, FieldRef::FromDotPath(R"([134234)"));
ASSERT_RAISES(Invalid, FieldRef::FromDotPath(R"([1stuf])"));
}
TEST(TestFieldRef, DotPathRoundTrip) {
auto check_roundtrip = [](const FieldRef& ref) {
auto dot_path = ref.ToDotPath();
ASSERT_OK_AND_EQ(ref, FieldRef::FromDotPath(dot_path));
};
check_roundtrip(FieldRef());
check_roundtrip(FieldRef("foo"));
check_roundtrip(FieldRef("foo", 1, "bar", 2, 3));
check_roundtrip(FieldRef(1, 2, 3));
check_roundtrip(FieldRef("foo", 1, FieldRef("bar", 2, 3), FieldRef()));
}
TEST(TestFieldPath, Nested) {
auto f0 = field("alpha", int32());
auto f1_0 = field("alpha", int32());
auto f1 = field("beta", struct_({f1_0}));
auto f2_0 = field("alpha", int32());
auto f2_1_0 = field("alpha", int32());
auto f2_1_1 = field("alpha", int32());
auto f2_1 = field("gamma", struct_({f2_1_0, f2_1_1}));
auto f2 = field("beta", struct_({f2_0, f2_1}));
Schema s({f0, f1, f2});
// retrieving fields with nested indices
EXPECT_EQ(FieldPath({0}).Get(s), f0);
EXPECT_EQ(FieldPath({1, 0}).Get(s), f1_0);
EXPECT_EQ(FieldPath({2, 0}).Get(s), f2_0);
EXPECT_EQ(FieldPath({2, 1, 0}).Get(s), f2_1_0);
EXPECT_EQ(FieldPath({2, 1, 1}).Get(s), f2_1_1);
}
TEST(TestFieldRef, Nested) {
auto f0 = field("alpha", int32());
auto f1_0 = field("alpha", int32());
auto f1 = field("beta", struct_({f1_0}));
auto f2_0 = field("alpha", int32());
auto f2_1_0 = field("alpha", int32());
auto f2_1_1 = field("alpha", int32());
auto f2_1 = field("gamma", struct_({f2_1_0, f2_1_1}));
auto f2 = field("beta", struct_({f2_0, f2_1}));
Schema s({f0, f1, f2});
EXPECT_THAT(FieldRef("beta", "alpha").FindAll(s),
ElementsAre(FieldPath{1, 0}, FieldPath{2, 0}));
EXPECT_THAT(FieldRef("beta", "gamma", "alpha").FindAll(s),
ElementsAre(FieldPath{2, 1, 0}, FieldPath{2, 1, 1}));
}
TEST(TestFieldRef, Flatten) {
FieldRef ref;
auto assert_name = [](const FieldRef& ref, const std::string& expected) {
ASSERT_TRUE(ref.IsName());
ASSERT_EQ(*ref.name(), expected);
};
auto assert_path = [](const FieldRef& ref, const std::vector<int>& expected) {
ASSERT_TRUE(ref.IsFieldPath());
ASSERT_EQ(ref.field_path()->indices(), expected);
};
auto assert_nested = [](const FieldRef& ref, const std::vector<FieldRef>& expected) {
ASSERT_TRUE(ref.IsNested());
ASSERT_EQ(*ref.nested_refs(), expected);
};
assert_path(FieldRef(), {});
assert_path(FieldRef(1, 2, 3), {1, 2, 3});
// If all leaves are field paths, they are fully flattened
assert_path(FieldRef(1, FieldRef(2, 3)), {1, 2, 3});
assert_path(FieldRef(1, FieldRef(2, 3), FieldRef(), FieldRef(FieldRef(4), FieldRef(5))),
{1, 2, 3, 4, 5});
assert_path(FieldRef(FieldRef(), FieldRef(FieldRef(), FieldRef())), {});
assert_name(FieldRef("foo"), "foo");
// Nested empty field refs are optimized away
assert_nested(FieldRef("foo", 1, FieldRef(), FieldRef(FieldRef(), "bar")),
{FieldRef("foo"), FieldRef(1), FieldRef("bar")});
// For now, subsequences of indices are not concatenated
assert_nested(FieldRef("foo", FieldRef("bar"), FieldRef(1, 2), FieldRef(3)),
{FieldRef("foo"), FieldRef("bar"), FieldRef(1, 2), FieldRef(3)});
}
using TestSchema = ::testing::Test;
TEST_F(TestSchema, Basics) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f1_optional = field("f1", uint8());
auto f2 = field("f2", utf8());
auto schema = ::arrow::schema({f0, f1, f2});
ASSERT_EQ(3, schema->num_fields());
AssertFieldEqual(*f0, *schema->field(0));
AssertFieldEqual(*f1, *schema->field(1));
AssertFieldEqual(*f2, *schema->field(2));
auto schema2 = ::arrow::schema({f0, f1, f2});
std::vector<std::shared_ptr<Field>> fields3 = {f0, f1_optional, f2};
auto schema3 = std::make_shared<Schema>(fields3);
AssertSchemaEqual(schema, schema2);
AssertSchemaNotEqual(schema, schema3);
ASSERT_EQ(*schema, *schema2);
ASSERT_NE(*schema, *schema3);
ASSERT_EQ(schema->fingerprint(), schema2->fingerprint());
ASSERT_NE(schema->fingerprint(), schema3->fingerprint());
auto schema4 = ::arrow::schema({f0}, Endianness::Little);
auto schema5 = ::arrow::schema({f0}, Endianness::Little);
auto schema6 = ::arrow::schema({f0}, Endianness::Big);
auto schema7 = ::arrow::schema({f0});
AssertSchemaEqual(schema4, schema5);
AssertSchemaNotEqual(schema4, schema6);
#if ARROW_LITTLE_ENDIAN
AssertSchemaEqual(schema4, schema7);
AssertSchemaNotEqual(schema6, schema7);
#else
AssertSchemaNotEqual(schema4, schema6);
AssertSchemaEqual(schema6, schema7);
#endif
ASSERT_EQ(schema4->fingerprint(), schema5->fingerprint());
ASSERT_NE(schema4->fingerprint(), schema6->fingerprint());
#if ARROW_LITTLE_ENDIAN
ASSERT_EQ(schema4->fingerprint(), schema7->fingerprint());
ASSERT_NE(schema6->fingerprint(), schema7->fingerprint());
#else
ASSERT_NE(schema4->fingerprint(), schema7->fingerprint());
ASSERT_EQ(schema6->fingerprint(), schema7->fingerprint());
#endif
}
TEST_F(TestSchema, ToString) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8());
auto f3 = field("f3", list(int16()));
auto metadata = key_value_metadata({"foo"}, {"bar"});
auto schema = ::arrow::schema({f0, f1, f2, f3}, metadata);
std::string result = schema->ToString();
std::string expected = R"(f0: int32
f1: uint8 not null
f2: string
f3: list<item: int16>)";
ASSERT_EQ(expected, result);
result = schema->ToString(/*print_metadata=*/true);
std::string expected_with_metadata = expected + R"(
-- metadata --
foo: bar)";
ASSERT_EQ(expected_with_metadata, result);
// With swapped endianness
#if ARROW_LITTLE_ENDIAN
schema = schema->WithEndianness(Endianness::Big);
expected = R"(f0: int32
f1: uint8 not null
f2: string
f3: list<item: int16>
-- endianness: big --)";
#else
schema = schema->WithEndianness(Endianness::Little);
expected = R"(f0: int32
f1: uint8 not null
f2: string
f3: list<item: int16>
-- endianness: little --)";
#endif
result = schema->ToString();
ASSERT_EQ(expected, result);
result = schema->ToString(/*print_metadata=*/true);
expected_with_metadata = expected + R"(
-- metadata --
foo: bar)";
ASSERT_EQ(expected_with_metadata, result);
}
TEST_F(TestSchema, GetFieldByName) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8());
auto f3 = field("f3", list(int16()));
auto schema = ::arrow::schema({f0, f1, f2, f3});
std::shared_ptr<Field> result;
result = schema->GetFieldByName("f1");
AssertFieldEqual(f1, result);
result = schema->GetFieldByName("f3");
AssertFieldEqual(f3, result);
result = schema->GetFieldByName("not-found");
ASSERT_EQ(result, nullptr);
}
TEST_F(TestSchema, GetFieldIndex) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8());
auto f3 = field("f3", list(int16()));
auto schema = ::arrow::schema({f0, f1, f2, f3});
ASSERT_EQ(0, schema->GetFieldIndex(f0->name()));
ASSERT_EQ(1, schema->GetFieldIndex(f1->name()));
ASSERT_EQ(2, schema->GetFieldIndex(f2->name()));
ASSERT_EQ(3, schema->GetFieldIndex(f3->name()));
ASSERT_EQ(-1, schema->GetFieldIndex("not-found"));
}
TEST_F(TestSchema, GetFieldDuplicates) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8());
auto f3 = field("f1", list(int16()));
auto schema = ::arrow::schema({f0, f1, f2, f3});
ASSERT_EQ(0, schema->GetFieldIndex(f0->name()));
ASSERT_EQ(-1, schema->GetFieldIndex(f1->name())); // duplicate
ASSERT_EQ(2, schema->GetFieldIndex(f2->name()));
ASSERT_EQ(-1, schema->GetFieldIndex("not-found"));
ASSERT_EQ(std::vector<int>{0}, schema->GetAllFieldIndices(f0->name()));
ASSERT_EQ(std::vector<int>({1, 3}), schema->GetAllFieldIndices(f1->name()));
ASSERT_TRUE(::arrow::schema({f0, f1, f2})->HasDistinctFieldNames());
ASSERT_FALSE(schema->HasDistinctFieldNames());
std::vector<std::shared_ptr<Field>> results;
results = schema->GetAllFieldsByName(f0->name());
ASSERT_EQ(results.size(), 1);
AssertFieldEqual(results[0], f0);
results = schema->GetAllFieldsByName(f1->name());
ASSERT_EQ(results.size(), 2);
if (results[0]->type()->id() == Type::UINT8) {
AssertFieldEqual(results[0], f1);
AssertFieldEqual(results[1], f3);
} else {
AssertFieldEqual(results[0], f3);
AssertFieldEqual(results[1], f1);
}
results = schema->GetAllFieldsByName("not-found");
ASSERT_EQ(results.size(), 0);
}
TEST_F(TestSchema, CanReferenceFieldsByNames) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8());
auto f3 = field("f1", list(int16()));
auto schema = ::arrow::schema({f0, f1, f2, f3});
ASSERT_OK(schema->CanReferenceFieldsByNames({"f0", "f2"}));
ASSERT_OK(schema->CanReferenceFieldsByNames({"f2", "f0"}));
// Not found
ASSERT_RAISES(Invalid, schema->CanReferenceFieldsByNames({"nope"}));
ASSERT_RAISES(Invalid, schema->CanReferenceFieldsByNames({"f0", "nope"}));
// Duplicates
ASSERT_RAISES(Invalid, schema->CanReferenceFieldsByNames({"f1"}));
ASSERT_RAISES(Invalid, schema->CanReferenceFieldsByNames({"f0", "f1"}));
// Both
ASSERT_RAISES(Invalid, schema->CanReferenceFieldsByNames({"f0", "f1", "nope"}));
}
TEST_F(TestSchema, TestMetadataConstruction) {
auto metadata0 = key_value_metadata({{"foo", "bar"}, {"bizz", "buzz"}});
auto metadata1 = key_value_metadata({{"foo", "baz"}});
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8(), true);
auto f3 = field("f2", utf8(), true, metadata1->Copy());
auto schema0 = ::arrow::schema({f0, f1, f2}, metadata0);
auto schema1 = ::arrow::schema({f0, f1, f2}, metadata1);
auto schema2 = ::arrow::schema({f0, f1, f2}, metadata0->Copy());
auto schema3 = ::arrow::schema({f0, f1, f3}, metadata0->Copy());
ASSERT_TRUE(metadata0->Equals(*schema0->metadata()));
ASSERT_TRUE(metadata1->Equals(*schema1->metadata()));
ASSERT_TRUE(metadata0->Equals(*schema2->metadata()));
AssertSchemaEqual(schema0, schema2);
AssertSchemaEqual(schema0, schema1);
AssertSchemaNotEqual(schema0, schema1, /*check_metadata=*/true);
AssertSchemaEqual(schema2, schema1);
AssertSchemaNotEqual(schema2, schema1, /*check_metadata=*/true);
// Field has different metatadata
AssertSchemaEqual(schema2, schema3);
AssertSchemaNotEqual(schema2, schema3, /*check_metadata=*/true);
ASSERT_EQ(schema0->fingerprint(), schema1->fingerprint());
ASSERT_EQ(schema0->fingerprint(), schema2->fingerprint());
ASSERT_EQ(schema0->fingerprint(), schema3->fingerprint());
ASSERT_NE(schema0->metadata_fingerprint(), schema1->metadata_fingerprint());
ASSERT_EQ(schema0->metadata_fingerprint(), schema2->metadata_fingerprint());
ASSERT_NE(schema0->metadata_fingerprint(), schema3->metadata_fingerprint());
}
TEST_F(TestSchema, TestNestedMetadataComparison) {
auto item0 = field("item", int32(), true);
auto item1 = field("item", int32(), true, key_value_metadata({{"foo", "baz"}}));
Schema schema0({field("f", list(item0))});
Schema schema1({field("f", list(item1))});
ASSERT_EQ(schema0.fingerprint(), schema1.fingerprint());
ASSERT_NE(schema0.metadata_fingerprint(), schema1.metadata_fingerprint());
AssertSchemaEqual(schema0, schema1);
AssertSchemaNotEqual(schema0, schema1, /* check_metadata = */ true);
}
TEST_F(TestSchema, TestDeeplyNestedMetadataComparison) {
auto item0 = field("item", int32(), true);
auto item1 = field("item", int32(), true, key_value_metadata({{"foo", "baz"}}));
Schema schema0(
{field("f", list(list(sparse_union({field("struct", struct_({item0}))}))))});
Schema schema1(
{field("f", list(list(sparse_union({field("struct", struct_({item1}))}))))});
ASSERT_EQ(schema0.fingerprint(), schema1.fingerprint());
ASSERT_NE(schema0.metadata_fingerprint(), schema1.metadata_fingerprint());
AssertSchemaEqual(schema0, schema1);
AssertSchemaNotEqual(schema0, schema1, /* check_metadata = */ true);
}
TEST_F(TestSchema, TestFieldsDifferOnlyInMetadata) {
auto f0 = field("f", utf8(), true, nullptr);
auto f1 = field("f", utf8(), true, key_value_metadata({{"foo", "baz"}}));
Schema schema0({f0, f1});
Schema schema1({f1, f0});
AssertSchemaEqual(schema0, schema1);
AssertSchemaNotEqual(schema0, schema1, /* check_metadata = */ true);
ASSERT_EQ(schema0.fingerprint(), schema1.fingerprint());
ASSERT_NE(schema0.metadata_fingerprint(), schema1.metadata_fingerprint());
}
TEST_F(TestSchema, TestEmptyMetadata) {
// Empty metadata should be equivalent to no metadata at all
auto f1 = field("f1", int32());
auto metadata1 = key_value_metadata({});
auto metadata2 = key_value_metadata({"foo"}, {"foo value"});
auto schema1 = ::arrow::schema({f1});
auto schema2 = ::arrow::schema({f1}, metadata1);
auto schema3 = ::arrow::schema({f1}, metadata2);
AssertSchemaEqual(schema1, schema2);
AssertSchemaNotEqual(schema1, schema3, /*check_metadata=*/true);
ASSERT_EQ(schema1->fingerprint(), schema2->fingerprint());
ASSERT_EQ(schema1->fingerprint(), schema3->fingerprint());
ASSERT_EQ(schema1->metadata_fingerprint(), schema2->metadata_fingerprint());
ASSERT_NE(schema1->metadata_fingerprint(), schema3->metadata_fingerprint());
}
TEST_F(TestSchema, TestWithMetadata) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8());
std::vector<std::shared_ptr<Field>> fields = {f0, f1, f2};
auto metadata = key_value_metadata({"foo", "bar"}, {"bizz", "buzz"});
auto schema = std::make_shared<Schema>(fields);
std::shared_ptr<Schema> new_schema = schema->WithMetadata(metadata);
ASSERT_TRUE(metadata->Equals(*new_schema->metadata()));
// Not copied
ASSERT_TRUE(metadata.get() == new_schema->metadata().get());
}
TEST_F(TestSchema, TestRemoveMetadata) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8());
std::vector<std::shared_ptr<Field>> fields = {f0, f1, f2};
auto schema = std::make_shared<Schema>(fields);
std::shared_ptr<Schema> new_schema = schema->RemoveMetadata();
ASSERT_TRUE(new_schema->metadata() == nullptr);
}
void AssertSchemaBuilderYield(const SchemaBuilder& builder,
const std::shared_ptr<Schema>& expected) {
ASSERT_OK_AND_ASSIGN(auto schema, builder.Finish());
AssertSchemaEqual(schema, expected);
}
TEST(TestSchemaBuilder, DefaultBehavior) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8());
SchemaBuilder builder;
ASSERT_OK(builder.AddField(f0));
ASSERT_OK(builder.AddField(f1));
ASSERT_OK(builder.AddField(f2));
AssertSchemaBuilderYield(builder, schema({f0, f1, f2}));
builder.Reset();
ASSERT_OK(builder.AddFields({f0, f1, f2->WithNullable(false)}));
AssertSchemaBuilderYield(builder, schema({f0, f1, f2->WithNullable(false)}));
builder.Reset();
ASSERT_OK(builder.AddSchema(schema({f2, f0})));
AssertSchemaBuilderYield(builder, schema({f2, f0}));
builder.Reset();
ASSERT_OK(builder.AddSchemas({schema({f1, f2}), schema({f2, f0})}));
AssertSchemaBuilderYield(builder, schema({f1, f2, f2, f0}));
}
TEST(TestSchemaBuilder, WithMetadata) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto metadata = key_value_metadata({{"foo", "bar"}});
SchemaBuilder builder;
ASSERT_OK(builder.AddMetadata(*metadata));
ASSERT_OK_AND_ASSIGN(auto schema, builder.Finish());
AssertSchemaEqual(schema, ::arrow::schema({})->WithMetadata(metadata));
ASSERT_OK(builder.AddField(f0));
ASSERT_OK_AND_ASSIGN(schema, builder.Finish());
AssertSchemaEqual(schema, ::arrow::schema({f0})->WithMetadata(metadata));
SchemaBuilder other_builder{::arrow::schema({})->WithMetadata(metadata)};
ASSERT_OK(other_builder.AddField(f1));
ASSERT_OK_AND_ASSIGN(schema, other_builder.Finish());
AssertSchemaEqual(schema, ::arrow::schema({f1})->WithMetadata(metadata));
other_builder.Reset();
ASSERT_OK(other_builder.AddField(f1->WithMetadata(metadata)));
ASSERT_OK_AND_ASSIGN(schema, other_builder.Finish());
AssertSchemaEqual(schema, ::arrow::schema({f1->WithMetadata(metadata)}));
}
TEST(TestSchemaBuilder, IncrementalConstruction) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8(), false);
auto f2 = field("f2", utf8());
SchemaBuilder builder;
std::shared_ptr<Schema> actual;
ASSERT_OK_AND_ASSIGN(actual, builder.Finish());
AssertSchemaEqual(actual, ::arrow::schema({}));
ASSERT_OK(builder.AddField(f0));
ASSERT_OK_AND_ASSIGN(actual, builder.Finish());
AssertSchemaEqual(actual, ::arrow::schema({f0}));
ASSERT_OK(builder.AddField(f1));
ASSERT_OK_AND_ASSIGN(actual, builder.Finish());
AssertSchemaEqual(actual, ::arrow::schema({f0, f1}));
ASSERT_OK(builder.AddField(f2));
AssertSchemaBuilderYield(builder, schema({f0, f1, f2}));
}
TEST(TestSchemaBuilder, PolicyIgnore) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8());
auto f0_req = field("f0", utf8(), false);
SchemaBuilder builder{SchemaBuilder::CONFLICT_IGNORE};
ASSERT_OK(builder.AddFields({f0, f1}));
AssertSchemaBuilderYield(builder, schema({f0, f1}));
ASSERT_OK(builder.AddField(f0_req));
AssertSchemaBuilderYield(builder, schema({f0, f1}));
ASSERT_OK(builder.AddField(f0));
AssertSchemaBuilderYield(builder, schema({f0, f1}));
}
TEST(TestSchemaBuilder, PolicyReplace) {
auto f0 = field("f0", int32());
auto f1 = field("f1", uint8());
auto f0_req = field("f0", utf8(), false);
SchemaBuilder builder{SchemaBuilder::CONFLICT_REPLACE};
ASSERT_OK(builder.AddFields({f0, f1}));
AssertSchemaBuilderYield(builder, schema({f0, f1}));
ASSERT_OK(builder.AddField(f0_req));
AssertSchemaBuilderYield(builder, schema({f0_req, f1}));
ASSERT_OK(builder.AddField(f0));
AssertSchemaBuilderYield(builder, schema({f0, f1}));
}
TEST(TestSchemaBuilder, PolicyMerge) {
auto f0 = field("f0", int32(), true);
auto f1 = field("f1", uint8());
// Same as f0, but not required.
auto f0_opt = field("f0", int32());
// Another type, can't merge
auto f0_other = field("f0", utf8(), false);
SchemaBuilder builder{SchemaBuilder::CONFLICT_MERGE};
ASSERT_OK(builder.AddFields({f0, f1}));
AssertSchemaBuilderYield(builder, schema({f0, f1}));
ASSERT_OK(builder.AddField(f0_opt));
AssertSchemaBuilderYield(builder, schema({f0_opt, f1}));
// Unsupported merge with a different type
ASSERT_RAISES(Invalid, builder.AddField(f0_other));
// Builder should still contain state
AssertSchemaBuilderYield(builder, schema({f0, f1}));
builder.Reset();
// Create a schema with duplicate fields
builder.SetPolicy(SchemaBuilder::CONFLICT_APPEND);
ASSERT_OK(builder.AddFields({f0, f0}));
builder.SetPolicy(SchemaBuilder::CONFLICT_MERGE);
// Even if the field is compatible, it can't know with which field to merge.
ASSERT_RAISES(Invalid, builder.AddField(f0_opt));
AssertSchemaBuilderYield(builder, schema({f0, f0}));
}
TEST(TestSchemaBuilder, PolicyError) {
auto f0 = field("f0", int32(), true);
auto f1 = field("f1", uint8());
// Same as f0, but not required.
auto f0_opt = field("f0", int32());
// Another type, can't merge
auto f0_other = field("f0", utf8(), false);
SchemaBuilder builder{SchemaBuilder::CONFLICT_ERROR};
ASSERT_OK(builder.AddFields({f0, f1}));
AssertSchemaBuilderYield(builder, schema({f0, f1}));
ASSERT_RAISES(Invalid, builder.AddField(f0));
ASSERT_RAISES(Invalid, builder.AddField(f0_opt));
ASSERT_RAISES(Invalid, builder.AddField(f0_other));
AssertSchemaBuilderYield(builder, schema({f0, f1}));
}
TEST(TestSchemaBuilder, Merge) {
auto f0 = field("f0", int32(), true);
auto f1 = field("f1", uint8());
// Same as f0, but not required.