tests/python/test_string.py

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import pickle

import tvm_ffi
import tvm_ffi.testing


def test_string() -> None:
    fecho = tvm_ffi.get_global_func("testing.echo")
    s = tvm_ffi.core.String("hello")
    s2 = fecho(s)
    assert s2 == "hello"
    s3 = tvm_ffi.convert("hello")
    assert isinstance(s3, str)

    x = "hello long string"
    assert fecho(x) == x

    s4 = pickle.loads(pickle.dumps(s))
    assert s4 == "hello"
    assert type(s4) is str

    cached = fecho("x" * 200)
    assert isinstance(cached, tvm_ffi.core.String)
    assert cached._tvm_ffi_cached_object is not None

    cached_roundtrip = pickle.loads(pickle.dumps(cached))
    assert cached_roundtrip == cached
    assert type(cached_roundtrip) is str


def test_bytes() -> None:
    fecho = tvm_ffi.get_global_func("testing.echo")
    b = tvm_ffi.core.Bytes(b"hello")
    assert isinstance(b, tvm_ffi.core.Bytes)
    b2 = fecho(b)
    assert b2 == b"hello"

    b3 = tvm_ffi.convert(b"hello")
    assert isinstance(b3, tvm_ffi.core.Bytes)
    assert isinstance(b3, bytes)

    b4 = tvm_ffi.convert(bytearray(b"hello"))
    assert isinstance(b4, tvm_ffi.core.Bytes)
    assert isinstance(b4, bytes)

    b5 = pickle.loads(pickle.dumps(b))
    assert b5 == b"hello"
    assert type(b5) is bytes

    cached = fecho(b"x" * 200)
    assert isinstance(cached, tvm_ffi.core.Bytes)
    assert cached._tvm_ffi_cached_object is not None

    cached_roundtrip = pickle.loads(pickle.dumps(cached))
    assert cached_roundtrip == cached
    assert type(cached_roundtrip) is bytes


def test_string_find_substr() -> None:
    s = tvm_ffi.core.String("hello world")
    assert s.find("world") == 6
    assert s.find("hello") == 0
    assert s.find("o") == 4
    assert s.find("o", 5) == 7
    assert s.find("notfound") == -1
    assert s.find("") == 0
    assert s.find("", 5) == 5
    assert s.find("", 11) == 11
    assert s.find("", 20) == -1

    assert s[6:11] == "world"
    assert s[0:5] == "hello"
    assert s[6:] == "world"
    assert s[:5] == "hello"