Value args[] = {value_null(), value_int(42), value_int(99)};

auto r = fn_coalesce(args, 3, arena);

EXPECT_EQ(r.int_val, 42);

Value args[] = {value_int(1), value_int(2)};

auto r = fn_coalesce(args, 2, arena);

EXPECT_EQ(r.int_val, 1);

Value args[] = {value_null(), value_null(), value_null()};

auto r = fn_coalesce(args, 3, arena);

EXPECT_TRUE(r.is_null());

Value args[] = {value_int(42), value_int(99)};

auto r = fn_nullif(args, 2, arena);

EXPECT_EQ(r.int_val, 42);

Value args[] = {value_int(42), value_double(42.0)};

// Different tags -> not equal -> return first arg

auto r = fn_nullif(args, 2, arena);

EXPECT_EQ(r.int_val, 42);

const char* s = "hello";

Value args[] = {value_string(StringRef{s, 5}), value_string(StringRef{s, 5})};

EXPECT_TRUE(fn_nullif(args, 2, arena).is_null());