For speech rate in settings up/down move by 10, left/right move by 1. Easier to get settings right without having to hold doown the arrow keys lol.

internal/preferences/application_test.go

@@ -28,7 +28,7 @@ func TestApplicationSettingsOnlyExposeRestorableControls(t *testing.T) {
 	session.Handle(interaction.Key{Name: "tab"})
 	session.Handle(interaction.Key{Name: "up"})
 	saved, err := Application_settings(session, base)
-	if err != nil || saved.Presentation.Speech.Rate != base.Presentation.Speech.Rate+1 || saved.Keyboard.Layout != base.Keyboard.Layout {
+	if err != nil || saved.Presentation.Speech.Rate != base.Presentation.Speech.Rate+10 || saved.Keyboard.Layout != base.Keyboard.Layout {
 		t.Fatal(saved, err)
 	}
 }

internal/preferences/settings.go

@@ -132,6 +132,9 @@ func make_control(definition config.Definition, settings config.Settings, discov
 			control.Number = value.(float64)
 		}
 		control.Min, control.Max, control.Step = definition.Min, definition.Max, definition.Step
+		if definition.Path == "presentation.speech.rate" {
+			control.UpDownStep = 10
+		}
 	case reflect.String:
 		control.Kind, control.Text = interaction.Entry, value.(string)
 	case reflect.Slice:

internal/preferences/settings_test.go

@@ -19,6 +19,7 @@ package preferences
 
 import (
 	"reflect"
+	"strconv"
 	"strings"
 	"testing"
 
@@ -52,11 +53,51 @@ func TestSettingsFormCoversSchemaAndReturnsIsolatedDraft(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if draft.Presentation.Speech.Enabled || draft.Presentation.Speech.Rate != 1 || !base.Presentation.Speech.Enabled || base.Presentation.Speech.Rate != 0 {
+	if draft.Presentation.Speech.Enabled || draft.Presentation.Speech.Rate != 10 || !base.Presentation.Speech.Enabled || base.Presentation.Speech.Rate != 0 {
 		t.Fatal("draft isolation", draft, base)
 	}
 }
 
+func TestSpeechRateArrowSteps(t *testing.T) {
+	for _, application := range []bool{false, true} {
+		for _, trial := range []struct {
+			start int
+			key   string
+			want  int
+		}{
+			{-3, "up", 7}, {-3, "down", -13},
+			{-3, "right", -2}, {-3, "left", -4},
+			{96, "up", 100}, {-96, "down", -100},
+			{100, "up", 100}, {-100, "down", -100},
+			{100, "right", 100}, {-100, "left", -100},
+			{100, "down", 90}, {-100, "up", -90},
+			{100, "left", 99}, {-100, "right", -99},
+		} {
+			base := config.Defaults()
+			base.Presentation.Speech.Rate = trial.start
+			session, err := new_session(base, []string{"presentation"}, MenuTitle, application)
+			if err != nil {
+				t.Fatal(err)
+			}
+			session.Handle(interaction.Key{Name: "tab"}) // Speech enabled.
+			session.Handle(interaction.Key{Name: "tab"}) // Rate.
+			result := session.Handle(interaction.Key{Name: trial.key})
+			if want := "Rate " + strconv.Itoa(trial.want); result.Speech != want {
+				t.Fatalf("application=%v, rate=%d, key=%s: speech=%q, want %q", application, trial.start, trial.key, result.Speech, want)
+			}
+			var draft config.Settings
+			if application {
+				draft, err = Application_settings(session, base)
+			} else {
+				draft, err = Settings(session, base)
+			}
+			if err != nil || draft.Presentation.Speech.Rate != trial.want || base.Presentation.Speech.Rate != trial.start {
+				t.Fatalf("application=%v, trial=%+v: draft rate=%d, base rate=%d, err=%v", application, trial, draft.Presentation.Speech.Rate, base.Presentation.Speech.Rate, err)
+			}
+		}
+	}
+}
+
 func TestReadingModeIsConstrainedAndSavedInDraft(t *testing.T) {
 	base := config.Defaults()
 	session, err := New_session(base, []string{"reading"})