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#include "ut3/py_test_engine.h"
#include <library/cpp/testing/unittest/registar.h>
using namespace NPython;
Y_UNIT_TEST_SUITE(TPyStreamTest) {
void Ui32StreamValidator(const NUdf::TUnboxedValuePod& value) {
UNIT_ASSERT(value);
UNIT_ASSERT(value.IsBoxed());
NUdf::TUnboxedValue item;
ui32 expected = 0;
NUdf::EFetchStatus status;
while (true) {
status = value.Fetch(item);
if (status != NUdf::EFetchStatus::Ok) break;
ui32 actual = item.Get<ui32>();
UNIT_ASSERT_EQUAL(actual, expected);
expected++;
}
UNIT_ASSERT_EQUAL(status, NUdf::EFetchStatus::Finish);
UNIT_ASSERT_EQUAL(expected, 10);
}
struct TTestStream final: NUdf::TBoxedValue {
TTestStream(ui32 maxValue, ui32 yieldOn = Max<ui32>())
: Current_(0)
, YieldOn_(yieldOn)
, MaxValue_(maxValue)
{
}
private:
NUdf::EFetchStatus Fetch(NUdf::TUnboxedValue& result) override {
if (Current_ == YieldOn_) {
return NUdf::EFetchStatus::Yield;
} else if (Current_ >= MaxValue_) {
return NUdf::EFetchStatus::Finish;
}
result = NUdf::TUnboxedValuePod(Current_++);
return NUdf::EFetchStatus::Ok;
}
ui32 Current_, YieldOn_, MaxValue_;
};
Y_UNIT_TEST(FromGenerator) {
TPythonTestEngine engine;
engine.ToMiniKQL<NUdf::TStream<ui32>>(
"def Test():\n"
" num = 0\n"
" while num < 10:\n"
" yield num\n"
" num += 1\n",
Ui32StreamValidator);
}
Y_UNIT_TEST(FromGeneratorFactory) {
TPythonTestEngine engine;
engine.ToMiniKQL<NUdf::TStream<ui32>>(
"def first_10():\n"
" num = 0\n"
" while num < 10:\n"
" yield num\n"
" num += 1\n"
"def Test():\n"
" return first_10\n",
Ui32StreamValidator);
}
Y_UNIT_TEST(FromIterator) {
TPythonTestEngine engine;
engine.ToMiniKQL<NUdf::TStream<ui32>>(
"def Test():\n"
" return iter(range(10))\n",
Ui32StreamValidator);
}
Y_UNIT_TEST(FromIterable) {
TPythonTestEngine engine;
engine.ToMiniKQL<NUdf::TStream<ui32>>(
"def Test():\n"
#if PY_MAJOR_VERSION >= 3
" return range(10)\n",
#else
" return xrange(10)\n",
#endif
Ui32StreamValidator);
}
Y_UNIT_TEST(FromCustomIterable) {
TPythonTestEngine engine;
engine.ToMiniKQL<NUdf::TStream<ui32>>(
"class T:\n"
" def __init__(self, l):\n"
" self.l = l\n"
" def __len__(self):\n"
" return len(self.l)\n"
" def __nonzero__(self):\n"
" return bool(self.l)\n"
" def __iter__(self):\n"
" return iter(self.l)\n"
"\n"
"def Test():\n"
" return T(list(range(10)))\n",
Ui32StreamValidator);
}
Y_UNIT_TEST(FromList) {
TPythonTestEngine engine;
engine.ToMiniKQL<NUdf::TStream<ui32>>(
"def Test():\n"
" return [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]\n",
Ui32StreamValidator);
}
Y_UNIT_TEST(ToPython) {
TPythonTestEngine engine;
engine.ToPython<NUdf::TStream<ui32>>(
[](const TType* /*type*/, const NUdf::IValueBuilder& /*vb*/) {
return NUdf::TUnboxedValuePod(new TTestStream(10));
},
"def Test(value):\n"
" import yql\n"
" assert repr(value) == '<yql.TStream>'\n"
" assert type(value).__name__ == 'TStream'\n"
" assert list(value) == [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]\n");
}
Y_UNIT_TEST(ToPythonAndBackAsIs) {
TPythonTestEngine engine;
engine.ToPythonAndBack<NUdf::TStream<ui32>>(
[](const TType* /*type*/, const NUdf::IValueBuilder& /*vb*/) {
return NUdf::TUnboxedValuePod(new TTestStream(10));
},
"def Test(value): return value",
Ui32StreamValidator
);
}
Y_UNIT_TEST(YieldingStreamFromPython) {
TPythonTestEngine engine;
engine.ToMiniKQL<NUdf::TStream<ui32>>(
"import yql\n"
"def Test():\n"
" yield 0\n"
" yield 1\n"
" yield yql.TYieldIteration\n"
" yield 2\n",
[](const NUdf::TUnboxedValuePod& value) {
UNIT_ASSERT(value);
UNIT_ASSERT(value.IsBoxed());
NUdf::TUnboxedValue item;
ui32 expected = 0;
NUdf::EFetchStatus status;
while ((status = value.Fetch(item)) == NUdf::EFetchStatus::Ok) {
ui32 actual = item.Get<ui32>();
UNIT_ASSERT_EQUAL(actual, expected);
expected++;
}
UNIT_ASSERT_EQUAL(status, NUdf::EFetchStatus::Yield);
UNIT_ASSERT_EQUAL(expected, 2);
});
}
Y_UNIT_TEST(YieldingStreamFromCpp) {
TPythonTestEngine engine;
engine.ToPython<NUdf::TStream<ui32>>(
[](const TType* /*type*/, const NUdf::IValueBuilder& /*vb*/) {
return NUdf::TUnboxedValuePod(new TTestStream(5, 2));
},
"import yql\n"
"def Test(value):\n"
" assert repr(value) == '<yql.TStream>'\n"
" assert type(value).__name__ == 'TStream'\n"
" assert next(value) == 0\n"
" assert next(value) == 1\n"
" try:\n"
" next(value)\n"
" except yql.TYieldIteration:\n"
" pass\n"
" else:\n"
" assert False, 'Expected yql.TYieldIteration'\n");
}
Y_UNIT_TEST(FromCppListIterator) {
TPythonTestEngine engine;
engine.ToPythonAndBack<NUdf::TListType<ui32>, NUdf::TStream<ui32>>(
[](const TType*, const NUdf::IValueBuilder& vb) {
NUdf::TUnboxedValue *items = nullptr;
const auto a = vb.NewArray(10U, items);
ui32 i = 0U;
std::generate_n(items, 10U, [&i](){ return NUdf::TUnboxedValuePod(i++); });
return a;
},
"def Test(value): return iter(value)",
Ui32StreamValidator
);
}
}
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