1.- Margin, border and padding test for separate and collapse border models:

Separate:

Carnivores Primates
Tiger Sifaka

Collapse:

Carnivores Primates
Tiger Sifaka

2.- Test for different border widths in collapsing border model:

1px 1 2
3 4
2px 1 2
3 4
3px 1 2
3 4
4px 1 2
3 4
10px 1 2
3 4

3.- A sample wide-border table in both modes:

Separate:

Carnivores Primates
Tiger Grey Wolf Indri
Cheetah Cape hunting dog Sifaka
Red fox
Wildcat Fennec Dwarf lemur

Collapse:

Carnivores Primates
Tiger Grey Wolf Indri
Cheetah Cape hunting dog Sifaka
Red fox
Wildcat Fennec Dwarf lemur

4.- collapse should overrule cellspacing

These tables should look the same:

<table style="border-collapse: collapse;">
First TD of first TR Second TD of first TR Third TD of first TR
First TD of second TR Third TD of second TR
<table style="border-collapse: collapse;" cellspacing="10">
First TD of first TR Second TD of first TR Third TD of first TR
First TD of second TR Third TD of second TR