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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#
#     http://www.apache.org/licenses/LICENSE-2.0
#
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# See the License for the specific language governing permissions and
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# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========


def test_ifs_comma_splits_read(shell):
    out = shell.mirage('IFS=, read a b c <<< "1,2,3"; echo "$a:$b:$c"')
    assert out == "1:2:3\n"


def test_ifs_default_whitespace(shell):
    out = shell.mirage('echo "1 2 3" | { read a b c; echo "$a:$b:$c"; }')
    assert out == "1:2:3\n"


def test_ifs_prefix_does_not_persist(shell):
    out = shell.mirage('IFS=, read a b c <<< "1,2,3"; '
                       'echo "${IFS-default}"')
    assert "," not in out


def test_env_prefix_to_command(shell):
    out = shell.mirage('FOO=bar bash -c "echo $FOO"')
    assert "bar" in out


def test_ifs_colon_split(shell):
    out = shell.mirage('IFS=: read a b c <<< "x:y:z"; echo "$a-$b-$c"')
    assert out == "x-y-z\n"