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C API: Test arity 2 primop

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This commit is contained in:
Robert Hensing 2024-05-23 19:20:04 +02:00
parent 4bc4fb40ea
commit ab106c5ca3
1 changed files with 59 additions and 0 deletions
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59
tests/unit/libexpr/nix_api_expr.cc
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@ -226,6 +226,65 @@ TEST_F(nix_api_expr_test, nix_expr_primop)
ASSERT_EQ(9, r); ASSERT_EQ(9, r);
} }
static void primop_repeat(void * user_data, nix_c_context * context, EvalState * state, Value ** args, Value * ret)
{
assert(context);
assert(state);
assert(user_data == SAMPLE_USER_DATA);
// Get the string to repeat
std::string s;
if (nix_get_string(context, args[0], OBSERVE_STRING(s)) != NIX_OK)
return;
// Get the number of times to repeat
auto n = nix_get_int(context, args[1]);
if (nix_err_code(context) != NIX_OK)
return;
// Repeat the string
std::string result;
for (int i = 0; i < n; ++i)
result += s;
nix_init_string(context, ret, result.c_str());
}
TEST_F(nix_api_expr_test, nix_expr_primop_arity_2)
{
PrimOp * primop =
nix_alloc_primop(ctx, primop_repeat, 2, "repeat", nullptr, "repeat a string", (void *) SAMPLE_USER_DATA);
assert_ctx_ok();
Value * primopValue = nix_alloc_value(ctx, state);
assert_ctx_ok();
nix_init_primop(ctx, primopValue, primop);
assert_ctx_ok();
Value * hello = nix_alloc_value(ctx, state);
assert_ctx_ok();
nix_init_string(ctx, hello, "hello");
assert_ctx_ok();
Value * three = nix_alloc_value(ctx, state);
assert_ctx_ok();
nix_init_int(ctx, three, 3);
assert_ctx_ok();
Value * partial = nix_alloc_value(ctx, state);
assert_ctx_ok();
nix_value_call(ctx, state, primopValue, hello, partial);
assert_ctx_ok();
Value * result = nix_alloc_value(ctx, state);
assert_ctx_ok();
nix_value_call(ctx, state, partial, three, result);
assert_ctx_ok();
std::string r;
nix_get_string(ctx, result, OBSERVE_STRING(r));
ASSERT_STREQ("hellohellohello", r.c_str());
}
static void static void
primop_bad_no_return(void * user_data, nix_c_context * context, EvalState * state, Value ** args, Value * ret) primop_bad_no_return(void * user_data, nix_c_context * context, EvalState * state, Value ** args, Value * ret)
{ {