Several types of tables are often needed in a sequence to define a single test.
Our first example test uses an ActionFixture table and several RowFixture tables.
The second example uses only ColumnFixture tables, with two fixtures.
When a sequence of tables together make up a single test, they will all access the same system under test, or part of it, if they change its state.
The first table in the sequence needs to be responsible for running the system under test. In Chapters 7 and 8 we'll see tools that support the sharing of common setup tables among tests.
