CSS Test: Non-Replaced Float Alignment to Containing Block Edges

In the following test, the teal blocks must be just inside the top and sides of the blue rectangle.

Teal block. Teal block. Teal block. Teal block. Teal block. Teal block. Teal block. Teal block.

Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle. Blue rectangle.