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test_expr_parser.py
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113 lines (108 loc) · 3.86 KB
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# Copyright 2022 The FeatHub Authors
#
# Licensed 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
#
# https://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 unittest
from feathub.dsl.ast import (
FuncCallOp,
ArgListNode,
VariableNode,
ValueNode,
LogicalOp,
IsOp,
NullNode,
CaseOp,
CompareOp,
BracketOp,
)
from feathub.dsl.expr_parser import ExprParser
class ExprParserTest(unittest.TestCase):
def setUp(self) -> None:
self.parser = ExprParser()
def test_expr_parser(self):
expected_mappings = {
"UNIX_TIMESTAMP(time)": FuncCallOp(
func_name="UNIX_TIMESTAMP",
args=ArgListNode(values=[VariableNode(var_name="time")]),
),
"UNIX_TIMESTAMP(time, '%Y-%m-%d %H:%M:%S.%f %z')": FuncCallOp(
func_name="UNIX_TIMESTAMP",
args=ArgListNode(
values=[
VariableNode(var_name="time"),
ValueNode(value="%Y-%m-%d %H:%M:%S.%f %z"),
]
),
),
"a AND b": LogicalOp(
op_type="AND",
left_child=VariableNode(var_name="a"),
right_child=VariableNode(var_name="b"),
),
"a and b": LogicalOp(
op_type="AND",
left_child=VariableNode(var_name="a"),
right_child=VariableNode(var_name="b"),
),
"a IS NULL": IsOp(
left_child=VariableNode(var_name="a"),
right_child=NullNode(),
),
"a IS NOT NULL": IsOp(
left_child=VariableNode(var_name="a"),
right_child=NullNode(),
is_not=True,
),
"CASE WHEN a > b THEN 1 WHEN a < b THEN 2 ELSE 3 END": CaseOp(
conditions=[
CompareOp(
op_type=">",
left_child=VariableNode(var_name="a"),
right_child=VariableNode(var_name="b"),
),
CompareOp(
op_type="<",
left_child=VariableNode(var_name="a"),
right_child=VariableNode(var_name="b"),
),
],
results=[
ValueNode(value=1),
ValueNode(value=2),
],
default=ValueNode(value=3),
),
"CASE WHEN a IS NULL THEN 1 END": CaseOp(
conditions=[
IsOp(
left_child=VariableNode(var_name="a"),
right_child=NullNode(),
),
],
results=[ValueNode(value=1)],
default=NullNode(),
),
"a['key1']": BracketOp(
left_child=VariableNode(var_name="a"),
right_child=ValueNode(value="key1"),
),
"a[0]": BracketOp(
left_child=VariableNode(var_name="a"),
right_child=ValueNode(value=0),
),
"a[b]": BracketOp(
left_child=VariableNode(var_name="a"),
right_child=VariableNode(var_name="b"),
),
}
for expr, node in expected_mappings.items():
self.assertEqual(node.to_json(), self.parser.parse(expr).to_json())