fix esp url

Author: Massimiliano Pippi

test/test_core.py

@@ -107,16 +107,14 @@ def test_core_updateindex_invalid_url(run_command):
 
 def test_core_install_esp32(run_command, data_dir):
     # update index
-    url = "https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json"
+    url = "https://arduino.esp8266.com/stable/package_esp8266com_index.json"
     assert run_command("core update-index --additional-urls={}".format(url))
     # install 3rd-party core
     assert run_command("core install esp32:esp32 --additional-urls={}".format(url))
     # create a sketch and compile to double check the core was successfully installed
     sketch_path = os.path.join(data_dir, "test_core_install_esp32")
     assert run_command("sketch new {}".format(sketch_path))
-    out = run_command("compile -b esp32:esp32:esp32 {}".format(sketch_path))
-    print(out.stderr)
-    assert out.ok
+    assert run_command("compile -b esp32:esp32:esp32 {}".format(sketch_path))
     # prevent regressions for https://github.com/arduino/arduino-cli/issues/163
     assert os.path.exists(
         os.path.join(