Method read

src/tests/unit_tests/eterm_test.cpp:27–34

		return n;
	}
	int read( char* buf, size_t n, bool ) override {
		if ( mBuffer.empty() )
			return 0;
		size_t toRead = std::min( n, mBuffer.size() );
		memcpy( buf, mBuffer.data(), toRead );
		mBuffer.erase( 0, toRead );
		return toRead;
	}
};

class MockProcess : public IProcess {