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test: Add a unit test reusing args as locals #346

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May 27, 2020
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test: Add a unit test reusing args as locals #346

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31 changes: 31 additions & 0 deletions test/unittests/execute_test.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
#include <test/utils/hex.hpp>

using namespace fizzy;
using namespace testing;

TEST(execute, end)
{
Expand Down Expand Up @@ -977,3 +978,33 @@ TEST(execute, fp_instructions)
// Second function with floating point parameters.
EXPECT_THAT(execute(*instance, 1, {}), Traps());
}

TEST(execute, reuse_args)
{
/* wat2wasm
(func $f (param i64 i64) (result i64)
local.get 0
local.get 1
i64.div_u
local.set 1
local.get 0
local.get 1
i64.rem_u
)
(func (result i64)
i64.const 23
i64.const 5
call $f
)
*/
const auto wasm = from_hex(
"0061736d01000000010b0260027e7e017e6000017e03030200010a19020e002000200180210120002001820b08"
"004217420510000b");

const std::vector<uint64_t> args{20, 3};
const auto expected = args[0] % (args[0] / args[1]);
EXPECT_THAT(execute(parse(wasm), 0, args), Result(expected));
EXPECT_THAT(args, ElementsAre(20, 3));

EXPECT_THAT(execute(parse(wasm), 1, {}), Result(23 % (23 / 5)));
}