479 lines
14 KiB
Python
479 lines
14 KiB
Python
import io
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import sys
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from pathlib import Path, PurePath
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from unittest.mock import Mock
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import pytest
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import fsspec.utils
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from fsspec.utils import (
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can_be_local,
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common_prefix,
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get_protocol,
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infer_storage_options,
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merge_offset_ranges,
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mirror_from,
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other_paths,
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read_block,
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seek_delimiter,
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setup_logging,
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)
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WIN = sys.platform.startswith("win")
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def test_read_block():
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delimiter = b"\n"
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data = delimiter.join([b"123", b"456", b"789"])
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f = io.BytesIO(data)
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assert read_block(f, 1, 2) == b"23"
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assert read_block(f, 0, 1, delimiter=b"\n") == b"123\n"
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assert read_block(f, 0, 2, delimiter=b"\n") == b"123\n"
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assert read_block(f, 0, 3, delimiter=b"\n") == b"123\n"
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assert read_block(f, 0, 5, delimiter=b"\n") == b"123\n456\n"
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assert read_block(f, 0, 8, delimiter=b"\n") == b"123\n456\n789"
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assert read_block(f, 0, 100, delimiter=b"\n") == b"123\n456\n789"
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assert read_block(f, 1, 1, delimiter=b"\n") == b""
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assert read_block(f, 1, 5, delimiter=b"\n") == b"456\n"
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assert read_block(f, 1, 8, delimiter=b"\n") == b"456\n789"
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for ols in [[(0, 3), (3, 3), (6, 3), (9, 2)], [(0, 4), (4, 4), (8, 4)]]:
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out = [read_block(f, o, l, b"\n") for o, l in ols]
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assert b"".join(filter(None, out)) == data
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def test_read_block_split_before():
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"""Test start/middle/end cases of split_before.""" # noqa: I
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d = (
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"#header" + "".join(">foo{i}\nFOOBAR{i}\n".format(i=i) for i in range(100000))
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).encode()
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# Read single record at beginning.
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# All reads include beginning of file and read through termination of
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# delimited record.
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assert read_block(io.BytesIO(d), 0, 10, delimiter=b"\n") == b"#header>foo0\n"
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assert (
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read_block(io.BytesIO(d), 0, 10, delimiter=b"\n", split_before=True)
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== b"#header>foo0"
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)
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assert (
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read_block(io.BytesIO(d), 0, 10, delimiter=b">") == b"#header>foo0\nFOOBAR0\n>"
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)
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assert (
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read_block(io.BytesIO(d), 0, 10, delimiter=b">", split_before=True)
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== b"#header>foo0\nFOOBAR0\n"
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)
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# Read multiple records at beginning.
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# All reads include beginning of file and read through termination of
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# delimited record.
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assert (
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read_block(io.BytesIO(d), 0, 27, delimiter=b"\n")
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== b"#header>foo0\nFOOBAR0\n>foo1\nFOOBAR1\n"
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)
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assert (
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read_block(io.BytesIO(d), 0, 27, delimiter=b"\n", split_before=True)
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== b"#header>foo0\nFOOBAR0\n>foo1\nFOOBAR1"
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)
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assert (
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read_block(io.BytesIO(d), 0, 27, delimiter=b">")
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== b"#header>foo0\nFOOBAR0\n>foo1\nFOOBAR1\n>"
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)
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assert (
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read_block(io.BytesIO(d), 0, 27, delimiter=b">", split_before=True)
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== b"#header>foo0\nFOOBAR0\n>foo1\nFOOBAR1\n"
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)
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# Read with offset spanning into next record, splits on either side of delimiter.
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# Read not spanning the full record returns nothing.
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assert read_block(io.BytesIO(d), 10, 3, delimiter=b"\n") == b"FOOBAR0\n"
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assert (
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read_block(io.BytesIO(d), 10, 3, delimiter=b"\n", split_before=True)
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== b"\nFOOBAR0"
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)
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assert read_block(io.BytesIO(d), 10, 3, delimiter=b">") == b""
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assert read_block(io.BytesIO(d), 10, 3, delimiter=b">", split_before=True) == b""
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# Read with offset spanning multiple records, splits on either side of delimiter
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assert (
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read_block(io.BytesIO(d), 10, 20, delimiter=b"\n")
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== b"FOOBAR0\n>foo1\nFOOBAR1\n"
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)
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assert (
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read_block(io.BytesIO(d), 10, 20, delimiter=b"\n", split_before=True)
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== b"\nFOOBAR0\n>foo1\nFOOBAR1"
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)
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assert read_block(io.BytesIO(d), 10, 20, delimiter=b">") == b"foo1\nFOOBAR1\n>"
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assert (
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read_block(io.BytesIO(d), 10, 20, delimiter=b">", split_before=True)
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== b">foo1\nFOOBAR1\n"
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)
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# Read record at end, all records read to end
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tlen = len(d)
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assert (
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read_block(io.BytesIO(d), tlen - 30, 35, delimiter=b"\n")
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== b">foo99999\nFOOBAR99999\n"
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)
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assert (
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read_block(io.BytesIO(d), tlen - 30, 35, delimiter=b"\n", split_before=True)
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== b"\n>foo99999\nFOOBAR99999\n"
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)
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assert (
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read_block(io.BytesIO(d), tlen - 30, 35, delimiter=b">")
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== b"foo99999\nFOOBAR99999\n"
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)
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assert (
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read_block(io.BytesIO(d), tlen - 30, 35, delimiter=b">", split_before=True)
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== b">foo99999\nFOOBAR99999\n"
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)
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def test_seek_delimiter_endline():
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f = io.BytesIO(b"123\n456\n789")
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# if at zero, stay at zero
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seek_delimiter(f, b"\n", 5)
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assert f.tell() == 0
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# choose the first block
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for bs in [1, 5, 100]:
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f.seek(1)
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seek_delimiter(f, b"\n", blocksize=bs)
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assert f.tell() == 4
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# handle long delimiters well, even with short blocksizes
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f = io.BytesIO(b"123abc456abc789")
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for bs in [1, 2, 3, 4, 5, 6, 10]:
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f.seek(1)
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seek_delimiter(f, b"abc", blocksize=bs)
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assert f.tell() == 6
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# End at the end
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f = io.BytesIO(b"123\n456")
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f.seek(5)
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seek_delimiter(f, b"\n", 5)
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assert f.tell() == 7
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def test_infer_options():
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so = infer_storage_options("/mnt/datasets/test.csv")
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assert so.pop("protocol") == "file"
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assert so.pop("path") == "/mnt/datasets/test.csv"
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assert not so
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assert infer_storage_options("./test.csv")["path"] == "./test.csv"
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assert infer_storage_options("../test.csv")["path"] == "../test.csv"
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so = infer_storage_options("C:\\test.csv")
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assert so.pop("protocol") == "file"
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assert so.pop("path") == "C:\\test.csv"
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assert not so
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assert infer_storage_options("d:\\test.csv")["path"] == "d:\\test.csv"
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assert infer_storage_options("\\test.csv")["path"] == "\\test.csv"
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assert infer_storage_options(".\\test.csv")["path"] == ".\\test.csv"
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assert infer_storage_options("test.csv")["path"] == "test.csv"
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so = infer_storage_options(
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"hdfs://username:pwd@Node:123/mnt/datasets/test.csv?q=1#fragm",
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inherit_storage_options={"extra": "value"},
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)
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assert so.pop("protocol") == "hdfs"
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assert so.pop("username") == "username"
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assert so.pop("password") == "pwd"
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assert so.pop("host") == "Node"
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assert so.pop("port") == 123
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assert so.pop("path") == "/mnt/datasets/test.csv#fragm"
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assert so.pop("url_query") == "q=1"
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assert so.pop("url_fragment") == "fragm"
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assert so.pop("extra") == "value"
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assert not so
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so = infer_storage_options("hdfs://User-name@Node-name.com/mnt/datasets/test.csv")
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assert so.pop("username") == "User-name"
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assert so.pop("host") == "Node-name.com"
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u = "http://127.0.0.1:8080/test.csv"
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assert infer_storage_options(u) == {"protocol": "http", "path": u}
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# For s3 and gcs the netloc is actually the bucket name, so we want to
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# include it in the path. Test that:
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# - Parsing doesn't lowercase the bucket
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# - The bucket is included in path
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for protocol in ["s3", "s3a", "gcs", "gs"]:
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options = infer_storage_options(f"{protocol}://Bucket-name.com/test.csv")
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assert options["path"] == "Bucket-name.com/test.csv"
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with pytest.raises(KeyError):
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infer_storage_options("file:///bucket/file.csv", {"path": "collide"})
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with pytest.raises(KeyError):
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infer_storage_options("hdfs:///bucket/file.csv", {"protocol": "collide"})
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def test_infer_simple():
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out = infer_storage_options("//mnt/datasets/test.csv")
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assert out["protocol"] == "file"
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assert out["path"] == "//mnt/datasets/test.csv"
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assert out.get("host", None) is None
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@pytest.mark.parametrize(
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"urlpath, expected_path",
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(
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(r"c:\foo\bar", r"c:\foo\bar"),
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(r"C:\\foo\bar", r"C:\\foo\bar"),
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(r"c:/foo/bar", r"c:/foo/bar"),
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(r"file:///c|\foo\bar", r"c:\foo\bar"),
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(r"file:///C|/foo/bar", r"C:/foo/bar"),
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(r"file:///C:/foo/bar", r"C:/foo/bar"),
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),
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)
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def test_infer_storage_options_c(urlpath, expected_path):
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so = infer_storage_options(urlpath)
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assert so["protocol"] == "file"
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assert so["path"] == expected_path
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@pytest.mark.parametrize(
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"paths, out",
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(
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(["/more/dir/", "/more/dir/two", "/more/one", "/more/three"], "/more"),
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(["/", "", "/"], ""),
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(["/", "/"], "/"),
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(["/more/", "/"], ""),
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(["/more/", "/more"], "/more"),
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(["more/dir/", "more/dir/two", "more/one", "more/three"], "more"),
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),
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)
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def test_common_prefix(paths, out):
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assert common_prefix(paths) == out
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@pytest.mark.parametrize(
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"paths, other, exists, expected",
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(
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(["/path1"], "/path2", False, ["/path2"]),
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(["/path1"], "/path2", True, ["/path2/path1"]),
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(["/path1"], "/path2", False, ["/path2"]),
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(["/path1"], "/path2/", True, ["/path2/path1"]),
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(["/path1"], ["/path2"], False, ["/path2"]),
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(["/path1"], ["/path2"], True, ["/path2"]),
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(["/path1", "/path2"], "/path2", False, ["/path2/path1", "/path2/path2"]),
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(["/path1", "/path2"], "/path2", True, ["/path2/path1", "/path2/path2"]),
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(
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["/more/path1", "/more/path2"],
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"/path2",
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False,
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["/path2/path1", "/path2/path2"],
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),
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(
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["/more/path1", "/more/path2"],
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"/path2",
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True,
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["/path2/more/path1", "/path2/more/path2"],
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),
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(
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["/more/path1", "/more/path2"],
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"/path2",
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False,
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["/path2/path1", "/path2/path2"],
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),
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(
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["/more/path1", "/more/path2"],
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"/path2",
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True,
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["/path2/more/path1", "/path2/more/path2"],
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),
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(
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["/more/path1", "/more/path2"],
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"/path2/",
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False,
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["/path2/path1", "/path2/path2"],
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),
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(
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["/more/path1", "/more/path2"],
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"/path2/",
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True,
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["/path2/more/path1", "/path2/more/path2"],
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),
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(
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["/more/path1", "/diff/path2"],
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"/path2/",
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False,
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["/path2/more/path1", "/path2/diff/path2"],
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),
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(
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["/more/path1", "/diff/path2"],
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"/path2/",
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True,
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["/path2/more/path1", "/path2/diff/path2"],
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),
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(["a", "b/", "b/c"], "dest/", False, ["dest/a", "dest/b/", "dest/b/c"]),
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(
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["/a", "/b/", "/b/c"],
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"dest/",
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False,
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["dest/a", "dest/b/", "dest/b/c"],
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),
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),
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)
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def test_other_paths(paths, other, exists, expected):
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assert other_paths(paths, other, exists) == expected
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def test_log():
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import logging
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logger = setup_logging(logger_name="fsspec.test")
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assert logger.level == logging.DEBUG
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@pytest.mark.parametrize(
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"par",
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[
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("afile", "file"),
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("file://afile", "file"),
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("noproto://afile", "noproto"),
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("noproto::stuff", "noproto"),
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("simplecache::stuff", "simplecache"),
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("simplecache://stuff", "simplecache"),
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("s3://afile", "s3"),
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(Path("afile"), "file"),
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],
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)
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def test_get_protocol(par):
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url, outcome = par
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assert get_protocol(url) == outcome
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@pytest.mark.parametrize(
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"par",
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[
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("afile", True),
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("file://afile", True),
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("noproto://afile", False),
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("noproto::stuff", False),
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("simplecache::stuff", True),
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("simplecache://stuff", True),
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(Path("afile"), True),
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],
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)
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def test_can_local(par):
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url, outcome = par
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assert can_be_local(url) == outcome
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def test_mirror_from():
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mock = Mock()
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mock.attr = 1
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@mirror_from("client", ["attr", "func_1", "func_2"])
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class Real:
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@property
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def client(self):
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return mock
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def func_2(self):
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assert False, "have to overwrite this"
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def func_3(self):
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return "should succeed"
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obj = Real()
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assert obj.attr == mock.attr
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obj.func_1()
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mock.func_1.assert_called()
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obj.func_2(1, 2)
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mock.func_2.assert_called_with(1, 2)
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assert obj.func_3() == "should succeed"
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mock.func_3.assert_not_called()
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@pytest.mark.parametrize("max_gap", [0, 32])
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@pytest.mark.parametrize("max_block", [None, 128])
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def test_merge_offset_ranges(max_gap, max_block):
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# Input ranges
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# (Using out-of-order ranges for full coverage)
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paths = ["foo", "bar", "bar", "bar", "foo"]
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starts = [0, 0, 512, 64, 32]
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ends = [32, 32, 1024, 256, 64]
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# Call merge_offset_ranges
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(
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result_paths,
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result_starts,
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result_ends,
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) = merge_offset_ranges(
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paths,
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starts,
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ends,
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max_gap=max_gap,
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max_block=max_block,
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)
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# Check result
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if max_block is None and max_gap == 32:
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expect_paths = ["bar", "bar", "foo"]
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expect_starts = [0, 512, 0]
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expect_ends = [256, 1024, 64]
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else:
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expect_paths = ["bar", "bar", "bar", "foo"]
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expect_starts = [0, 64, 512, 0]
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expect_ends = [32, 256, 1024, 64]
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assert expect_paths == result_paths
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assert expect_starts == result_starts
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assert expect_ends == result_ends
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def test_size():
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f = io.BytesIO(b"hello")
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assert fsspec.utils.file_size(f) == 5
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assert f.tell() == 0
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class _HasFspath:
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def __fspath__(self):
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return "foo"
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class _HasPathAttr:
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def __init__(self):
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self.path = "foo"
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@pytest.mark.parametrize(
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"path,expected",
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[
|
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# coerce to string
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("foo", "foo"),
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(Path("foo"), "foo"),
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(PurePath("foo"), "foo"),
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(_HasFspath(), "foo"),
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(_HasPathAttr(), "foo"),
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# passthrough
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(b"bytes", b"bytes"),
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(None, None),
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(1, 1),
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(True, True),
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(o := object(), o),
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([], []),
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((), ()),
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(set(), set()),
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],
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)
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def test_stringify_path(path, expected):
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path = fsspec.utils.stringify_path(path)
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assert path == expected
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