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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.

import pytest

import datafusion

from datafusion import (

AggregateUDF,

DataFrame,

SessionContext,

ScalarUDF,

functions,

)

from datafusion.common import (

DFSchema,

)

from datafusion.expr import (

Expr,

Column,

Literal,

BinaryExpr,

AggregateFunction,

Projection,

TableScan,

Filter,

Limit,

Aggregate,

Sort,

Analyze,

Join,

JoinType,

JoinConstraint,

Union,

Like,

ILike,

SimilarTo,

ScalarVariable,

Alias,

Not,

IsNotNull,

IsTrue,

IsFalse,

IsUnknown,

IsNotTrue,

IsNotFalse,

IsNotUnknown,

Negative,

InList,

Exists,

Subquery,

InSubquery,

ScalarSubquery,

GroupingSet,

Placeholder,

Case,

Cast,

TryCast,

SubqueryAlias,

Between,

Explain,

Extension,

CreateMemoryTable,

CreateView,

Distinct,

DropTable,

Repartition,

Partitioning,

)

def test_import_datafusion():

assert datafusion.__name__ == "datafusion"

def test_datafusion_python_version():

assert datafusion.__version__ is not None

def test_class_module_is_datafusion():

# context

for klass in [

SessionContext,

]:

assert klass.__module__ == "datafusion.context"

# dataframe

for klass in [

DataFrame,

]:

assert klass.__module__ == "datafusion.dataframe"

# udf

for klass in [

AggregateUDF,

ScalarUDF,

]:

assert klass.__module__ == "datafusion.udf"

# expressions

for klass in [Expr, Column, Literal, BinaryExpr, AggregateFunction]:

assert klass.__module__ == "datafusion.expr"

# operators

for klass in [

Projection,

TableScan,

Aggregate,

Sort,

Limit,

Filter,

Analyze,

Join,

JoinType,

JoinConstraint,

Union,

Like,

ILike,

SimilarTo,

ScalarVariable,

Alias,

Not,

IsNotNull,

IsTrue,

IsFalse,

IsUnknown,

IsNotTrue,

IsNotFalse,

IsNotUnknown,

Negative,

InList,

Exists,

Subquery,

InSubquery,

ScalarSubquery,

GroupingSet,

Placeholder,

Case,

Cast,

TryCast,

Between,

SubqueryAlias,

Explain,

Extension,

CreateMemoryTable,

CreateView,

Distinct,

DropTable,

Repartition,

Partitioning,

]:

assert klass.__module__ == "datafusion.expr"

# schema

for klass in [DFSchema]:

assert klass.__module__ == "datafusion.common"

def test_import_from_functions_submodule():

from datafusion.functions import abs, sin # noqa

assert functions.abs is abs

assert functions.sin is sin

msg = "cannot import name 'foobar' from 'datafusion.functions'"

with pytest.raises(ImportError, match=msg):

from datafusion.functions import foobar # noqa

def test_classes_are_inheritable():

class MyExecContext(SessionContext):

pass

class MyExpression(Expr):

pass

class MyDataFrame(DataFrame):

pass