assertions_test.dart 13.8 KB
Newer Older
1 2 3 4 5
// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/foundation.dart';
6
import '../flutter_test_alternative.dart';
7 8 9 10 11 12 13 14 15 16

import 'capture_output.dart';

void main() {
  test('debugPrintStack', () {
    final List<String> log = captureOutput(() {
      debugPrintStack(label: 'Example label', maxFrames: 7);
    });
    expect(log[0], contains('Example label'));
    expect(log[1], contains('debugPrintStack'));
17
  });
18 19 20

  test('debugPrintStack', () {
    final List<String> log = captureOutput(() {
21
      final FlutterErrorDetails details = FlutterErrorDetails(
22 23 24
        exception: 'Example exception',
        stack: StackTrace.current,
        library: 'Example library',
25 26 27
        context: ErrorDescription('Example context'),
        informationCollector: () sync* {
          yield ErrorDescription('Example information');
28 29 30 31 32 33 34 35 36 37 38 39 40 41
        },
      );

      FlutterError.dumpErrorToConsole(details);
    });

    expect(log[0], contains('EXAMPLE LIBRARY'));
    expect(log[1], contains('Example context'));
    expect(log[2], contains('Example exception'));

    final String joined = log.join('\n');

    expect(joined, contains('captureOutput'));
    expect(joined, contains('\nExample information\n'));
42
  });
43

44 45
  test('FlutterErrorDetails.toString', () {
    expect(
46
      FlutterErrorDetails(
47 48
        exception: 'MESSAGE',
        library: 'LIBRARY',
49 50 51
        context: ErrorDescription('CONTEXTING'),
        informationCollector: () sync* {
          yield ErrorDescription('INFO');
52 53
        },
      ).toString(),
54 55 56 57 58 59 60
        '══╡ EXCEPTION CAUGHT BY LIBRARY ╞════════════════════════════════\n'
        'The following message was thrown CONTEXTING:\n'
        'MESSAGE\n'
        '\n'
        'INFO\n'
        '═════════════════════════════════════════════════════════════════\n'

61 62
    );
    expect(
63
      FlutterErrorDetails(
64
        library: 'LIBRARY',
65 66 67
        context: ErrorDescription('CONTEXTING'),
        informationCollector: () sync* {
          yield ErrorDescription('INFO');
68 69
        },
      ).toString(),
70 71
      '══╡ EXCEPTION CAUGHT BY LIBRARY ╞════════════════════════════════\n'
      'The following Null object was thrown CONTEXTING:\n'
72
      '  null\n'
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90
      '\n'
      'INFO\n'
      '═════════════════════════════════════════════════════════════════\n',
    );
    expect(
      FlutterErrorDetails(
        exception: 'MESSAGE',
        context: ErrorDescription('CONTEXTING'),
        informationCollector: () sync* {
          yield ErrorDescription('INFO');
        },
      ).toString(),
        '══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞══════════════════════\n'
        'The following message was thrown CONTEXTING:\n'
        'MESSAGE\n'
        '\n'
        'INFO\n'
        '═════════════════════════════════════════════════════════════════\n'
91 92
    );
    expect(
93
      FlutterErrorDetails(
94
        exception: 'MESSAGE',
95 96 97
        context: ErrorDescription('CONTEXTING ${'SomeContext(BlaBla)'}'),
        informationCollector: () sync* {
          yield ErrorDescription('INFO');
98 99
        },
      ).toString(),
100 101
      '══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞══════════════════════\n'
      'The following message was thrown CONTEXTING SomeContext(BlaBla):\n'
102
      'MESSAGE\n'
103 104 105
      '\n'
      'INFO\n'
      '═════════════════════════════════════════════════════════════════\n',
106 107 108 109 110
    );
    expect(
      const FlutterErrorDetails(
        exception: 'MESSAGE',
      ).toString(),
111 112 113 114
      '══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞══════════════════════\n'
      'The following message was thrown:\n'
      'MESSAGE\n'
      '═════════════════════════════════════════════════════════════════\n'
115 116 117
    );
    expect(
      const FlutterErrorDetails().toString(),
118 119 120 121
      '══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞══════════════════════\n'
      'The following Null object was thrown:\n'
      '  null\n'
      '═════════════════════════════════════════════════════════════════\n'
122 123
    );
  });
124

125 126 127 128 129 130 131 132 133 134 135 136 137 138
  test('FlutterErrorDetails.toStringShort', () {
    expect(
        FlutterErrorDetails(
          exception: 'MESSAGE',
          library: 'library',
          context: ErrorDescription('CONTEXTING'),
          informationCollector: () sync* {
            yield ErrorDescription('INFO');
          },
        ).toStringShort(),
        'Exception caught by library',
    );
  });

139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330
  test('FlutterError default constructor', () {
    FlutterError error = FlutterError(
      'My Error Summary.\n'
      'My first description.\n'
      'My second description.'
    );
    expect(error.diagnostics.length, equals(3));
    expect(error.diagnostics[0].level, DiagnosticLevel.summary);
    expect(error.diagnostics[1].level, DiagnosticLevel.info);
    expect(error.diagnostics[2].level, DiagnosticLevel.info);
    expect(error.diagnostics[0].toString(), 'My Error Summary.');
    expect(error.diagnostics[1].toString(), 'My first description.');
    expect(error.diagnostics[2].toString(), 'My second description.');
    expect(
      error.toStringDeep(),
      'FlutterError\n'
      '   My Error Summary.\n'
      '   My first description.\n'
      '   My second description.\n'
    );

    error = FlutterError(
      'My Error Summary.\n'
      'My first description.\n'
      'My second description.\n'
      '\n'
    );

    expect(error.diagnostics.length, equals(5));
    expect(error.diagnostics[0].level, DiagnosticLevel.summary);
    expect(error.diagnostics[1].level, DiagnosticLevel.info);
    expect(error.diagnostics[2].level, DiagnosticLevel.info);
    expect(error.diagnostics[0].toString(), 'My Error Summary.');
    expect(error.diagnostics[1].toString(), 'My first description.');
    expect(error.diagnostics[2].toString(), 'My second description.');
    expect(error.diagnostics[3].toString(), '');
    expect(error.diagnostics[4].toString(), '');
    expect(
      error.toStringDeep(),
      'FlutterError\n'
      '   My Error Summary.\n'
      '   My first description.\n'
      '   My second description.\n'
      '\n'
      '\n'
    );

    error = FlutterError(
      'My Error Summary.\n'
      'My first description.\n'
      '\n'
      'My second description.'
    );
    expect(error.diagnostics.length, equals(4));
    expect(error.diagnostics[0].level, DiagnosticLevel.summary);
    expect(error.diagnostics[1].level, DiagnosticLevel.info);
    expect(error.diagnostics[2].level, DiagnosticLevel.info);
    expect(error.diagnostics[3].level, DiagnosticLevel.info);
    expect(error.diagnostics[0].toString(), 'My Error Summary.');
    expect(error.diagnostics[1].toString(), 'My first description.');
    expect(error.diagnostics[2].toString(), '');
    expect(error.diagnostics[3].toString(), 'My second description.');

    expect(
      error.toStringDeep(),
      'FlutterError\n'
      '   My Error Summary.\n'
      '   My first description.\n'
      '\n'
      '   My second description.\n'
    );
    error = FlutterError('My Error Summary.');
    expect(error.diagnostics.length, 1);
    expect(error.diagnostics.first.level, DiagnosticLevel.summary);
    expect(error.diagnostics.first.toString(), 'My Error Summary.');

    expect(
      error.toStringDeep(),
      'FlutterError\n'
      '   My Error Summary.\n'
    );
  });

  test('Malformed FlutterError objects', () {
    {
      AssertionError error;
      try {
        throw FlutterError.fromParts(<DiagnosticsNode>[]);
      } on AssertionError catch (e) {
        error = e;
      }
      expect(
        FlutterErrorDetails(exception: error).toString(),
        '══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞══════════════════════\n'
        'The following assertion was thrown:\n'
        'Empty FlutterError\n'
        '═════════════════════════════════════════════════════════════════\n',
      );
    }

    {
      AssertionError error;
      try {
        throw FlutterError.fromParts(<DiagnosticsNode>[
          (ErrorDescription('Error description without a summary'))]);
      } on AssertionError catch (e) {
        error = e;
      }
      expect(
        FlutterErrorDetails(exception: error).toString(),
        '══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞══════════════════════\n'
        'The following assertion was thrown:\n'
        'FlutterError is missing a summary.\n'
        'All FlutterError objects should start with a short (one line)\n'
        'summary description of the problem that was detected.\n'
        'Malformed FlutterError:\n'
        '  Error description without a summary\n'
        '\n'
        'This error should still help you solve your problem, however\n'
        'please also report this malformed error in the framework by\n'
        'filing a bug on GitHub:\n'
        '  https://github.com/flutter/flutter/issues/new?template=BUG.md\n'
        '═════════════════════════════════════════════════════════════════\n',
      );
    }

    {
      AssertionError error;
      try {
        throw FlutterError.fromParts(<DiagnosticsNode>[
          ErrorSummary('Error Summary A'),
          ErrorDescription('Some descriptionA'),
          ErrorSummary('Error Summary B'),
          ErrorDescription('Some descriptionB'),
        ]);
      } on AssertionError catch (e) {
        error = e;
      }
      expect(
        FlutterErrorDetails(exception: error).toString(),
        '══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞══════════════════════\n'
        'The following assertion was thrown:\n'
        'FlutterError contained multiple error summaries.\n'
        'All FlutterError objects should have only a single short (one\n'
        'line) summary description of the problem that was detected.\n'
        'Malformed FlutterError:\n'
        '  Error Summary A\n'
        '  Some descriptionA\n'
        '  Error Summary B\n'
        '  Some descriptionB\n'
        '\n'
        'The malformed error has 2 summaries.\n'
        'Summary 1: Error Summary A\n'
        'Summary 2: Error Summary B\n'
        '\n'
        'This error should still help you solve your problem, however\n'
        'please also report this malformed error in the framework by\n'
        'filing a bug on GitHub:\n'
        '  https://github.com/flutter/flutter/issues/new?template=BUG.md\n'
        '═════════════════════════════════════════════════════════════════\n',
      );
    }

    {
      AssertionError error;
      try {
        throw FlutterError.fromParts(<DiagnosticsNode>[
          ErrorDescription('Some description'),
          ErrorSummary('Error summary'),
        ]);
      } on AssertionError catch (e) {
        error = e;
      }
      expect(
        FlutterErrorDetails(exception: error).toString(),
        '══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞══════════════════════\n'
        'The following assertion was thrown:\n'
        'FlutterError is missing a summary.\n'
        'All FlutterError objects should start with a short (one line)\n'
        'summary description of the problem that was detected.\n'
        'Malformed FlutterError:\n'
        '  Some description\n'
        '  Error summary\n'
        '\n'
        'This error should still help you solve your problem, however\n'
        'please also report this malformed error in the framework by\n'
        'filing a bug on GitHub:\n'
        '  https://github.com/flutter/flutter/issues/new?template=BUG.md\n'
        '═════════════════════════════════════════════════════════════════\n',
      );
    }
  });
331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354

  test('User-thrown exceptions have ErrorSummary properties', () {
    {
      DiagnosticsNode node;
      try {
        throw 'User thrown string';
      } catch (e) {
        node = FlutterErrorDetails(exception: e).toDiagnosticsNode();
      }
      final ErrorSummary summary = node.getProperties().whereType<ErrorSummary>().single;
      expect(summary.value, equals(<String>['User thrown string']));
    }

    {
      DiagnosticsNode node;
      try {
        throw ArgumentError.notNull('myArgument');
      } catch (e) {
        node = FlutterErrorDetails(exception: e).toDiagnosticsNode();
      }
      final ErrorSummary summary = node.getProperties().whereType<ErrorSummary>().single;
      expect(summary.value, equals(<String>['Invalid argument(s) (myArgument): Must not be null']));
    }
  });
355
}