fix-tests: missing def for strlen_P & python libs

[abdosn]

chagnes

• Added macro for strlen_P
• Modify deprecated python lib mosquitto to paho.mqtt

[hmueller01]

I was a little bit quick with merging ... :-)
Wanted to test the updates. Can you tell me how the tests are triggered?

[abdosn]

according to This readme

the local tests could be build

cd tests
make
make test

this will run all tests
it would be nice if this would implemented in a workflow

Python tests had a problem with ino tool ,, didn't try it yet

[hmueller01]

make results in

In file included from src/connect_spec.cpp:1:
../src/PubSubClient.h:146:5: error: no template named 'function' in namespace 'std'
  146 |     MQTT_CALLBACK_SIGNATURE;
      |     ^~~~~~~~~~~~~~~~~~~~~~~

on macOS. Does it compile on your computer?

After adding -std=c++11 this part compiles.
Created a branch for this:
https://github.com/hmueller01/pubsubclient3/tree/fix-test-compile
Can you try it, if this works on your computer as well?

But still got errors at

g++ -std=c++11 -I./src/lib -I../src src/receive_spec.cpp ../src/PubSubClient.cpp src/lib/BDDTest.cpp src/lib/Buffer.cpp src/lib/IPAddress.cpp src/lib/ShimClient.cpp src/lib/Stream.cpp -o bin/receive_spec
src/receive_spec.cpp:115:28: error: non-constant-expression cannot be narrowed from type 'int' to 'byte' (aka 'unsigned char') in initializer list [-Wc++11-narrowing]
  115 |     byte publish[] = {0x30,length-2,0x0,0x5,0x74,0x6f,0x70,0x69,0x63,0x70,0x61,0x79,0x6c,0x6f,0x61,0x64};
      |                            ^~~~~~~~
src/receive_spec.cpp:115:28: note: insert an explicit cast to silence this issue
  115 |     byte publish[] = {0x30,length-2,0x0,0x5,0x74,0x6f,0x70,0x69,0x63,0x70,0x61,0x79,0x6c,0x6f,0x61,0x64};
      |                            ^~~~~~~~
      |                            static_cast<byte>( )

Have to look into this tomorrow ...