chain-studio/test/approvals_origin_test.dart

// Approvals origin block — a reviewer must be able to see WHERE a
// pending approval comes from (which flow, step, run, project, and
// when it was requested) and WHAT approve / reject will do, without
// leaving the card. The run id in particular used to be dropped at
// the Dart mapping layer; this pins that it reaches the card, next
// to the rest of the origin facts and the plain-language intro.
//
// It also pins the honesty invariant from the usertest: a missing
// created_at must NOT be rendered as a fabricated "now" — the line
// is simply omitted, exactly like the run id on a legacy hub.
//
// Runs against the scriptable FakeHubService — never a real hub.

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:chain_studio/data/hub.dart';
import 'package:chain_studio/main.dart';

import 'support/fake_hub.dart';

/// Every rendered Text + SelectableText joined — the run id is a
/// SelectableText (copyable), so a Text-only sweep would miss it.
String _allText(WidgetTester tester) {
  final buf = StringBuffer();
  for (final w in tester.widgetList<Text>(find.byType(Text))) {
    buf.writeln(w.data ?? w.textSpan?.toPlainText() ?? '');
  }
  for (final w in tester.widgetList<SelectableText>(
    find.byType(SelectableText),
  )) {
    buf.writeln(w.data ?? '');
  }
  return buf.toString();
}

ApprovalRecord _pending({DateTime? createdAt, String? runId = 'run-abc123'}) {
  return ApprovalRecord(
    id: 'apr-1',
    flowName: 'classify-and-file',
    stepId: 'review',
    prompt: 'Bitte die Klassifikation prüfen',
    payloadPreview: '{"label":"Rechnung"}',
    createdAt: createdAt,
    expiresAt: null,
    status: 'pending',
    decidedAt: null,
    decidedBy: '',
    reason: '',
    project: 'lbs',
    flowExecution: runId,
  );
}

Future<String> _renderApprovals(
  WidgetTester tester,
  List<ApprovalRecord> approvals,
) async {
  final fake = installFakeHub();
  fake.approvals = approvals;
  SharedPreferences.setMockInitialValues({});
  tester.view.physicalSize = const Size(1280, 900);
  tester.view.devicePixelRatio = 1.0;
  addTearDown(tester.view.reset);
  await tester.pumpWidget(
    const StudioApp(
      initialThemeMode: ThemeModeValue.dark,
      initialLocale: Locale('de'),
    ),
  );
  await tester.pump(const Duration(milliseconds: 100));
  await tester.tap(find.byKey(const ValueKey('sidebar-item-approvals')));
  for (var i = 0; i < 12; i++) {
    await tester.pump(const Duration(milliseconds: 200));
  }
  final text = _allText(tester);
  await tester.pumpWidget(const SizedBox.shrink());
  await tester.pump(const Duration(minutes: 1));
  return text;
}

void main() {
  testWidgets('a pending approval card shows its full origin and an '
      'intro explaining approve / reject', (tester) async {
    final text = await _renderApprovals(tester, [
      _pending(createdAt: DateTime.utc(2026, 7, 26, 12, 0, 0)),
    ]);
    // The human question (headline).
    expect(text, contains('Bitte die Klassifikation prüfen'));
    // The origin block — every fact a reviewer needs to place it.
    expect(text, contains('HERKUNFT'));
    expect(text, contains('Flow: classify-and-file'));
    expect(text, contains('Schritt: review'));
    expect(text, contains('Projekt: lbs'));
    expect(text, contains('Angefordert:'));
    // The run id — the field that used to be dropped at the mapping.
    expect(text, contains('Lauf: run-abc123'));
    // The intro strip says what this inbox is and what the actions do.
    expect(text, contains('pausierte'));
  });

  testWidgets('a missing requested-at time is omitted, never faked as '
      '"now"', (tester) async {
    // created_at unknown: the honest behaviour is to drop the line,
    // not to invent a timestamp (which would even drift on refresh).
    final text = await _renderApprovals(tester, [_pending(createdAt: null)]);
    // The rest of the origin still renders.
    expect(text, contains('HERKUNFT'));
    expect(text, contains('Flow: classify-and-file'));
    expect(text, contains('Lauf: run-abc123'));
    // But no requested-at line at all.
    expect(text, isNot(contains('Angefordert:')));
  });

  testWidgets('a legacy approval without a run id omits the run line', (
    tester,
  ) async {
    final text = await _renderApprovals(tester, [
      _pending(createdAt: DateTime.utc(2026, 7, 26, 12, 0, 0), runId: null),
    ]);
    expect(text, contains('HERKUNFT'));
    expect(text, isNot(contains('Lauf:')));
  });
}