public async Task TakeLast()
{
// arrange
var list = new List <string> {
"a", "b", "c", "d", "e", "f", "g",
};
var pagingDetails = new PagingDetails
{
Last = 2
};
var connectionFactory = new QueryableConnectionResolver <string>(
list.AsQueryable(), pagingDetails);
// act
var connection = await connectionFactory.ResolveAsync(
CancellationToken.None);
// assert
Assert.Collection(connection.Edges,
t =>
{
Assert.Equal("f", t.Node);
Assert.Equal(5, GetPositionFromCursor(t.Cursor));
},
t =>
{
Assert.Equal("g", t.Node);
Assert.Equal(6, GetPositionFromCursor(t.Cursor));
});
}
public async Task HasPrevious_True()
{
// arrange
var list = new List <string> {
"a", "b", "c", "d", "e", "f", "g",
};
var connectionFactory = new QueryableConnectionResolver <string>(
list.AsQueryable(), new PagingDetails {
First = 1
});
var connection = await connectionFactory.ResolveAsync(
CancellationToken.None);
var pagingDetails = new PagingDetails
{
After = connection.PageInfo.StartCursor,
First = 2
};
connectionFactory = new QueryableConnectionResolver <string>(
list.AsQueryable(), pagingDetails);
// act
connection = await connectionFactory.ResolveAsync(
CancellationToken.None);
// assert
Assert.True(connection.PageInfo.HasPreviousPage);
}
public async Task HasPrevious_False()
{
// arrange
var list = new List <string> {
"a", "b", "c", "d", "e", "f", "g",
};
var pagingDetails = new PagingDetails();
var connectionFactory = new QueryableConnectionResolver <string>(
list.AsQueryable(), pagingDetails);
// act
var connection = await connectionFactory.ResolveAsync(
CancellationToken.None);
// assert
Assert.False(connection.PageInfo.HasPreviousPage);
}
public async Task TakeFirstAfter()
{
// arrange
var list = new List <string> {
"a", "b", "c", "d", "e", "f", "g",
};
var connectionFactory = new QueryableConnectionResolver <string>(
list.AsQueryable(), new PagingDetails {
First = 1
});
var connection = await connectionFactory.ResolveAsync(
CancellationToken.None);
var pagingDetails = new PagingDetails
{
After = connection.PageInfo.StartCursor,
First = 2
};
connectionFactory = new QueryableConnectionResolver <string>(
list.AsQueryable(), pagingDetails);
// act
connection = await connectionFactory.ResolveAsync(
CancellationToken.None);
// assert
Assert.Collection(connection.Edges,
t =>
{
Assert.Equal("b", t.Node);
Assert.Equal(1, GetPositionFromCursor(t.Cursor));
},
t =>
{
Assert.Equal("c", t.Node);
Assert.Equal(2, GetPositionFromCursor(t.Cursor));
});
}