Unit Testing Arduino ESP8266 in CI (Native) with libraries

I am using an Arduino ESP8266 with platformio. I am adding Unit Testing with the Unity framework and I want to run the tests in Gitlab CI. In my project, I use other libraries, such as ESP8266WiFi.

I am using the Native platform to run tests and my platformio.ini file looks like this:

[platformio]
default_envs = esp01

[env]
lib_deps = 
    dancol90/ESP8266Ping@^1.0

[env:esp01]
platform = espressif8266
framework = arduino
board = esp01
; Serial Monitor options
monitor_speed = 115200

[env:native]
; Testing without HW in CI, I am using this
platform = native
lib_deps = 
    ${env.lib_deps}
    fabiobatsilva/ArduinoFake@^0.3.1
; Coverage:
lib_compat_mode = off
build_src_filter = +<*> -<*dirs*> -<to/> -<exclude/>
build_flags =
  -lgcov
  --coverage
extra_scripts = ci/test_coverage.py

My test would be something like this:

#include <unity.h>
#include "data.h"

void test_1(void) {
  uint8_t mode = get_value();
  TEST_ASSERT_EQUAL(mode, 0);
}

int main(int argc, char **argv) {
    UNITY_BEGIN();

    RUN_TEST(test_1);

    return UNITY_END();
}

My simplified code would be (data.cpp file):

#include <ESP8266WiFi.h>

uint8_t mode = 0;
uint8_t get_value(){
  return mode;
}

The compilation is working fine with pio run. I am running this command to run the tests:

pio test -e native -vvv

The error is:

test\test_main.cpp:2:25: fatal error: ESP8266WiFi.h: No such file or directory

Maybe ArduinoFake can't emulate this library? Or should I include the library somehow? Or can't I Unit Test the way I am trying to do it?

If I have this test without importing my code, the test passes:

#include <unity.h>
// #include "data.h"

void test_1(void) {
  //uint8_t mode = get_value();
  TEST_ASSERT_EQUAL(0, 0);
}

int main(int argc, char **argv) {
    UNITY_BEGIN();

    RUN_TEST(test_1);

    return UNITY_END();
}

As it is recommended in the official documentation, the code should be encapsulated in different components. And some components should not depend on exterior libraries, like that I could add unit tests of some of the components.