Added an additional test case and a fix for using the pmset command

The other commands still need to be mocked and tested/fixed, too.

plugins/available/battery.plugin.bash

@@ -92,7 +92,13 @@ battery_percentage(){
         echo '100'
       ;;
       *)
-        echo $PMSET_OUTPUT | head -c 2
+        # This will cut off any decimals, and will get rid of the optional percentage sign at the end, too.
+        # Works for:
+        # - 100%
+        # - 100.0%
+        # - 99.8%
+        # - 4%
+        echo $PMSET_OUTPUT | grep -o "[0-9]\+" | head -1
       ;;
     esac
   elif _command_exists ioreg;

test/plugins/battery.plugin.bats

@@ -26,6 +26,15 @@ load ../../plugins/available/battery.plugin
   assert_output "98"
 }
 
+@test 'plugins battery: battery-percentage with pmset, 98.5%' {
+  function pmset {
+    echo "-InternalBattery-0 (id=12345)	98.5%; discharging; 16:00 remaining present: true"
+  }
+
+  run battery_percentage
+  assert_output "98"
+}
+
 @test 'plugins battery: battery-percentage with pmset, 4%' {
   function pmset {
     echo "-InternalBattery-0 (id=12345)	4%; discharging; 16:00 remaining present: true"