Compare one set of vars with another and t.Error on any difference.

DiffString produces a git-like diff of two multi-line strings.

NewNestedConstructor returns a constructor where flags have specific hierarchical names delimited by the provided delim.

UnindentString trims s of leading and trailing whitespace, and then trims each line in s of every prefix.

ValidateFlags checks the core invariants of a flag set and its flags.

CoreConstructor produces a standard flag set with both short and long names.

DefaultConstructors are used for test cases that don't specify constructors.

StdConstructor produces a stdlib flag set adapter.

Constructor produces a flag set, and a set of vars managed by that flag set.

ParseTest describes a parsing test scenario.

Vars are a common set of variables used for testing.

TestCases are a collection of test cases that can be run as a group.