public async Task TakeLastSingle()
{
// arrange
var typeInspector = new DefaultTypeInspector();
IExtendedType sourceType = typeInspector.GetType(typeof(List <string>));
IPagingProvider pagingProvider = new QueryableCursorPagingProvider();
IPagingHandler pagingHandler = pagingProvider.CreateHandler(sourceType, default);
var list = new List <string> {
"f", "g"
};
var pagingDetails = new CursorPagingArguments(last: 1);
var context = new MockContext(pagingDetails);
// act
var connection = (Connection)await pagingHandler.SliceAsync(context, list);
// assert
Assert.Collection(connection.Edges,
t =>
{
Assert.Equal("g", t.Node);
Assert.Equal(1, GetPositionFromCursor(t.Cursor));
});
Assert.True(
connection.Info.HasPreviousPage,
"HasPreviousPage");
Assert.False(
connection.Info.HasNextPage,
"HasNextPage");
}
public async Task HasPrevious_True()
{
// arrange
var typeInspector = new DefaultTypeInspector();
IExtendedType sourceType = typeInspector.GetType(typeof(List <string>));
IPagingProvider pagingProvider = new QueryableCursorPagingProvider();
IPagingHandler pagingHandler = pagingProvider.CreateHandler(sourceType, default);
var list = new List <string> {
"a", "b", "c", "d", "e", "f", "g"
};
var pagingDetails = new CursorPagingArguments(first: 1);
var context = new MockContext(pagingDetails);
var connection = (Connection)await pagingHandler.SliceAsync(context, list);
pagingDetails = new CursorPagingArguments(after: connection.Info.EndCursor, first: 2);
context = new MockContext(pagingDetails);
// act
connection = (Connection)await pagingHandler.SliceAsync(context, list);
// assert
Assert.True(connection.Info.HasPreviousPage);
}
public PagingMiddleware(FieldDelegate next, IPagingHandler pagingHandler)
{
_next = next ??
throw new ArgumentNullException(nameof(next));
_pagingHandler = pagingHandler ??
throw new ArgumentNullException(nameof(pagingHandler));
}
public PostController(DbContext dbContext, IPostService postService, ICommentService commentService, IPagingHandler<Post> pagingHandler)
: base(dbContext)
{
this._postService = postService;
_commentService = commentService;
_pagingHandler = pagingHandler;
}
private static void ApplyConfiguration(
ITypeCompletionContext context,
ObjectFieldDefinition definition,
Type?entityType,
GetPagingProvider?resolvePagingProvider,
PagingOptions options,
FieldMiddleware placeholder)
{
options = context.GetSettings(options);
entityType ??= context.GetType <IOutputType>(definition.Type).ToRuntimeType();
resolvePagingProvider ??= ResolvePagingProvider;
IExtendedType sourceType = GetSourceType(context.TypeInspector, definition, entityType);
IPagingProvider pagingProvider = resolvePagingProvider(context.Services, sourceType);
IPagingHandler pagingHandler = pagingProvider.CreateHandler(sourceType, options);
FieldMiddleware middleware = CreateMiddleware(pagingHandler);
var index = definition.MiddlewareComponents.IndexOf(placeholder);
definition.MiddlewareComponents[index] = middleware;
}
public CategoryController(DbContext dbContext, ICategoryService categoryService, IPagingHandler<Post> pagingHandler)
: base(dbContext)
{
this._categoryService = categoryService;
_pagingHandler = pagingHandler;
}
private static FieldMiddleware CreateMiddleware(
IPagingHandler handler) =>
FieldClassMiddlewareFactory.Create(
typeof(PagingMiddleware),
(typeof(IPagingHandler), handler));