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from typing import List
import pytest
from sqlfmt.analyzer import Analyzer
from sqlfmt.exception import SqlfmtSegmentError
from sqlfmt.line import Line
from sqlfmt.segment import Segment, create_segments_from_lines
from tests.util import read_test_data
@pytest.mark.parametrize(
"source_string,expected_result",
[
("case\nfoo\nend\n", True),
("count(\n*\n)\n", True),
("count(\n*\n)\n\n\n", True),
("\n\n\ncount(\n*\n)", True),
("as (\nselect\n1\n)\n", True),
("as foo\n", False),
("from\nfoo\nwhere\n", False),
],
)
def test_tail_closes_head(
default_analyzer: Analyzer, source_string: str, expected_result: bool
) -> None:
q = default_analyzer.parse_query(source_string)
segment = Segment(q.lines)
assert segment.tail_closes_head == expected_result
def test_tail_closes_head_empty(default_analyzer: Analyzer) -> None:
q = default_analyzer.parse_query("a\n\n\n\n\n\n\n\nb\n")
blank_lines = q.lines[1:-1]
assert all(line.is_blank_line for line in blank_lines)
segment = Segment(blank_lines)
assert segment.tail_closes_head is False
@pytest.mark.parametrize(
"source_string,expected_idx",
[
("case\nfoo\nend\n", 0),
("\n\n\ncount(\n*\n)", 3),
("\n\n\n count(\n*\n)", 3),
("\n \n\n count(\n*\n)", 3),
],
)
def test_segment_head(
default_analyzer: Analyzer, source_string: str, expected_idx: int
) -> None:
q = default_analyzer.parse_query(source_string)
segment = Segment(q.lines)
line, i = segment.head
assert i == expected_idx
assert line == q.lines[i]
@pytest.mark.parametrize(
"source_string",
[
"",
"\n",
"\n\n\n \n\n",
],
)
def test_segment_head_raises(default_analyzer: Analyzer, source_string: str) -> None:
q = default_analyzer.parse_query(source_string)
segment = Segment(q.lines)
with pytest.raises(SqlfmtSegmentError):
_, _ = segment.head
@pytest.mark.parametrize(
"source_string,expected_idx",
[
("case\nfoo\nend,\na\n", 0),
("count(\n*\n),\n\n\na\n", 2),
],
)
def test_segment_tail(
default_analyzer: Analyzer, source_string: str, expected_idx: int
) -> None:
q = default_analyzer.parse_query(source_string)
# the parser eliminates trailing empty lines, so
# we need to add a nonblank line to our test cases
# and then strip that away
segment = Segment(q.lines[:-1])
line, i = segment.tail
assert i == expected_idx
assert line == segment[-(i + 1)]
@pytest.mark.parametrize(
"source_string",
[
"",
"\n",
"\n\n\n \n\n",
],
)
def test_segment_tail_raises(default_analyzer: Analyzer, source_string: str) -> None:
q = default_analyzer.parse_query(source_string)
segment = Segment(q.lines)
with pytest.raises(SqlfmtSegmentError):
_, _ = segment.tail
def test_split_into_segments(default_analyzer: Analyzer) -> None:
source_string, _ = read_test_data(
"unit_tests/test_merger/test_split_into_segments.sql"
)
q = default_analyzer.parse_query(source_string)
top_level_segments = create_segments_from_lines(q.lines)
assert len(top_level_segments) == 2
assert str(top_level_segments[0][0]).startswith("select")
assert str(top_level_segments[1][0]).startswith("from")
select_segment = [top_level_segments[0]]
assert select_segment == create_segments_from_lines(select_segment[0])
select_lines = select_segment[0]
assert not (
select_lines[-1].closes_bracket_from_previous_line
and select_lines[-1].depth == select_lines[0].depth
)
indented_segments = create_segments_from_lines(select_lines[1:])
expected_segments = [
" my_first_field,\n",
" my_second_field\n",
" as an_alias,\n",
" case\n",
" as my_case_statement,\n",
" case\n",
" case\n",
" ::numeric(\n",
" as casted_case\n",
" ,\n",
" (\n",
" +\n",
" ::varchar(\n",
" another_field,\n",
" case\n",
" + 4\n",
]
assert [str(segment[0]) for segment in indented_segments] == expected_segments
def test_split_into_segments_empty() -> None:
no_lines: List[Line] = []
result = create_segments_from_lines(no_lines)
assert result == []
@pytest.mark.parametrize(
"source_string,idx,expected_len",
[
("count(\nfoo\n)\n", 0, 2),
("\n\n\n\ncount(\nfoo\n)\n", 4, 2),
("foo,\nbar,\nbaz\n", 0, 1),
],
)
def test_split_after(
default_analyzer: Analyzer, source_string: str, idx: int, expected_len: int
) -> None:
q = default_analyzer.parse_query(source_string)
segment = Segment(q.lines)
remainder = segment.split_after(idx)
first_word = source_string.lstrip().splitlines(keepends=True)[0]
assert first_word not in [str(line) for s in remainder for line in s]
assert len(remainder) == expected_len
|
