refactor(ioscompanion): name the empty-editable-field sentinel for what it is

internal/driver/ioscompanion/hierarchymap.go

@@ -14,25 +14,14 @@ type rawFrame struct {
 	Height float64 `json:"height"`
 }
 
+// emptyFieldValueSentinel is what the accessibility bridge reports as the
+// AXValue of an empty editable field. It is bridge state, not app content, so
+// it maps to an empty value rather than surfacing as literal field text.
+const emptyFieldValueSentinel = "Invalid"
+
 // rawElement is one entry in the flat describe-all dump returned by the
 // simulator companion. Only the fields the mapper consumes are declared;
 // unknown fields are ignored.
-// unresolvedValueSentinel is what the accessibility bridge reports for a value
-// it cannot resolve yet (typically during app cold start). It is bridge state,
-// not app content.
-const unresolvedValueSentinel = "Invalid"
-
-// hasUnresolvedValues reports whether any element in the flat dump still
-// carries the bridge's unresolved-value sentinel.
-func hasUnresolvedValues(dump []byte) bool {
-	for _, element := range decodeDump(dump) {
-		if stringValue(element.AXValue) == unresolvedValueSentinel {
-			return true
-		}
-	}
-	return false
-}
-
 type rawElement struct {
 	Frame      rawFrame `json:"frame"`
 	AXUniqueID *string  `json:"AXUniqueId"`
@@ -108,9 +97,9 @@ func mapElement(element *rawElement) (treeNode, bool) {
 	}
 
 	value := stringValue(element.AXValue)
-	if value == unresolvedValueSentinel {
-		// Bridge state, not app content: surfacing it would show phantom
-		// field values in snapshots taken while the bridge catches up.
+	if value == emptyFieldValueSentinel {
+		// An empty editable field reads as this sentinel through the bridge;
+		// it is not app content, so treat the field as empty.
 		value = ""
 	}
 	label := stringValue(element.AXLabel)

internal/driver/ioscompanion/hierarchymap_test.go

@@ -224,27 +224,6 @@ func TestRootIsFlatWithAllChildren(t *testing.T) {
 	}
 }
 
-func TestHasUnresolvedValues(t *testing.T) {
-	cases := []struct {
-		name string
-		dump string
-		want bool
-	}{
-		{name: "sentinel value", dump: `[{"type":"TextField","AXValue":"Invalid","frame":{"x":0,"y":0,"width":1,"height":1}}]`, want: true},
-		{name: "clean values", dump: `[{"type":"TextField","AXValue":"hello","frame":{"x":0,"y":0,"width":1,"height":1}}]`, want: false},
-		{name: "empty value", dump: `[{"type":"TextField","AXValue":"","frame":{"x":0,"y":0,"width":1,"height":1}}]`, want: false},
-		{name: "empty dump", dump: `[]`, want: false},
-		{name: "malformed dump", dump: `nope`, want: false},
-	}
-	for _, c := range cases {
-		t.Run(c.name, func(t *testing.T) {
-			if got := hasUnresolvedValues([]byte(c.dump)); got != c.want {
-				t.Fatalf("got %v, want %v", got, c.want)
-			}
-		})
-	}
-}
-
 func TestMapHierarchySentinelValueMapsAsEmpty(t *testing.T) {
 	dump := `[{"type":"TextField","AXUniqueId":"F","AXLabel":"Email","AXValue":"Invalid","frame":{"x":0,"y":0,"width":10,"height":10},"enabled":true}]`
 	mapped, err := MapHierarchy([]byte(dump), 100, 100)