refactor: show 100% on battery error

relates to #20

docs/docs/segment-battery.md

@@ -34,7 +34,7 @@ Battery displays the remaining power percentage for your battery.
 ## Properties
 
 - battery_icon: `string` - the icon to use as a prefix for the battery percentage - defaults to empty
-- display_error: `boolean` - show the error context when failing to retrieve the battery information - defaults to `true`
+- display_error: `boolean` - show the error context when failing to retrieve the battery information - defaults to `false`
 - charging_icon: `string` - icon to display on the left when charging - defaults to empty
 - discharging_icon: `string` - icon to display on the left when discharging - defaults to empty
 - charged_icon: `string` - icon to display on the left when fully charged - defaults to empty

segment_battery.go

@@ -34,9 +34,10 @@ const (
 
 func (b *batt) enabled() bool {
 	bt, err := b.env.getBatteryInfo()
-	displayError := b.props.getBool(DisplayError, true)
+	displayError := b.props.getBool(DisplayError, false)
 	if err != nil && !displayError {
-		return false
+		b.percentageText = "100%"
+		return true
 	}
 	if err != nil {
 		b.percentageText = "BATT ERR"

segment_battery_test.go

@@ -119,8 +119,12 @@ func TestBatteryError(t *testing.T) {
 	err := errors.New("oh snap")
 	env.On("getBatteryInfo", nil).Return(&battery.Battery{}, err)
 	b := &batt{
-		props: nil,
-		env:   env,
+		props: &properties{
+			values: map[Property]interface{}{
+				DisplayError: true,
+			},
+		},
+		env: env,
 	}
 	assert.True(t, b.enabled())
 	assert.Equal(t, "BATT ERR", b.string())
@@ -130,15 +134,14 @@ func TestBatteryErrorHidden(t *testing.T) {
 	env := &MockedEnvironment{}
 	err := errors.New("oh snap")
 	env.On("getBatteryInfo", nil).Return(&battery.Battery{}, err)
-	props := &properties{
-		values: map[Property]interface{}{
-			DisplayError: false,
-		},
-	}
 	b := &batt{
-		props: props,
-		env:   env,
+		props: &properties{
+			values: map[Property]interface{}{
+				DisplayError: false,
+			},
+		},
+		env: env,
 	}
-	assert.False(t, b.enabled())
-	assert.Equal(t, "", b.string())
+	assert.True(t, b.enabled())
+	assert.Equal(t, "100%", b.string())
 }