Bound generated text content and diagnostics

internal/generatedtext/hourly_test.go

@@ -58,7 +58,7 @@ func TestValidateHourlyRejectsInvalidInput(t *testing.T) {
 		{
 			name: "unknown field",
 			in:   `{"summary":"Storm chances increase.","forecast_discussion":"A front will keep the region unsettled.","extra":"value"}`,
-			want: `unknown field "extra"`,
+			want: "unsupported field",
 		},
 		{
 			name: "missing summary",
@@ -83,17 +83,17 @@ func TestValidateHourlyRejectsInvalidInput(t *testing.T) {
 		{
 			name: "retired confidence field rejected",
 			in:   `{"summary":"Storm chances increase.","forecast_discussion":"A front will keep the region unsettled.","precipitation_timing":"","confidence":"Medium"}`,
-			want: `unknown field "confidence"`,
+			want: "unsupported field",
 		},
 		{
 			name: "old timing field rejected",
 			in:   `{"summary":"Storm chances increase.","forecast_discussion":"A front will keep the region unsettled.","timing":"Late morning."}`,
-			want: `unknown field "timing"`,
+			want: "unsupported field",
 		},
 		{
 			name: "old impacts field rejected",
 			in:   `{"summary":"Storm chances increase.","forecast_discussion":"A front will keep the region unsettled.","impacts":"Brief downpours."}`,
-			want: `unknown field "impacts"`,
+			want: "unsupported field",
 		},
 		{
 			name: "multiple values",