void _checkMethodsToStubAreValid()

in lib/src/builder.dart [598:629]

• 29 lines of code
• 6 McCabe index (conditional complexity)

  void _checkMethodsToStubAreValid(_MockTarget mockTarget) {
    final classElement = mockTarget.classElement;
    final className = classElement.name;
    final substitution = Substitution.fromInterfaceType(mockTarget.classType);
    final relevantMembers = _inheritanceManager
        .getInterface(classElement)
        .map
        .values
        .where((m) => !m.isPrivate && !m.isStatic)
        .map((member) => ExecutableMember.from2(member, substitution));
    final unstubbableErrorMessages = relevantMembers.expand((member) {
      if (_entryLib.typeSystem._returnTypeIsNonNullable(member) ||
          _entryLib.typeSystem._hasNonNullableParameter(member) ||
          _needsOverrideForVoidStub(member)) {
        return _checkFunction(member.type, member,
            hasDummyGenerator:
                mockTarget.fallbackGenerators.containsKey(member.name));
      } else {
        // Mockito is not going to override this method, so the types do not
        // need to be checked.
        return [];
      }
    }).toList();

    if (unstubbableErrorMessages.isNotEmpty) {
      final joinedMessages =
          unstubbableErrorMessages.map((m) => '    $m').join('\n');
      throw InvalidMockitoAnnotationException(
          'Mockito cannot generate a valid mock class which implements '
          "'$className' for the following reasons:\n$joinedMessages");
    }
  }