tweak error messages in emulator module

Author: KazuCocoa

CHANGELOG.md

@@ -5,6 +5,7 @@ Read `release_notes.md` for commit level details.
 ## [Unreleased]
 
 ### Enhancements
+- [internal] Tweak error messages in emulator module
 
 ### Bug fixes
 

lib/appium_lib_core/android/device/emulator.rb

@@ -131,7 +131,7 @@ def gsm_call(phone_number:, action:)
 
             ::Appium::Core::Device.add_endpoint_method(:gsm_signal) do
               def gsm_signal(signal_strength)
-                raise "#{signal_strength} should be member of #{GSM_SIGNALS} " if GSM_SIGNALS[signal_strength.to_sym].nil?
+                raise "#{signal_strength} should be member of #{GSM_SIGNALS.keys} " if GSM_SIGNALS[signal_strength.to_sym].nil?
 
                 execute(:gsm_signal, {}, { signalStrength: GSM_SIGNALS[signal_strength],
                                            signalStrengh: GSM_SIGNALS[signal_strength] })
@@ -158,7 +158,9 @@ def set_network_speed(netspeed)
 
             ::Appium::Core::Device.add_endpoint_method(:set_power_capacity) do
               def set_power_capacity(percent)
-                raise "The  percent should be between 0 and 100. Not #{percent}." unless (0..100).member? percent
+                unless (0..100).member? percent
+                  ::Appium::Logger.warn "The  percent should be between 0 and 100. Not #{percent}."
+                end
 
                 execute(:set_power_capacity, {}, { percent: percent })
               end