Example #1
0
func (stringSetSuite) TestUninitialized(c *C) {
	var uninitialized set.Strings
	c.Assert(uninitialized.Size(), Equals, 0)
	c.Assert(uninitialized.IsEmpty(), Equals, true)
	// You can get values and sorted values from an unitialized set.
	AssertValues(c, uninitialized)
	// All contains checks are false
	c.Assert(uninitialized.Contains("foo"), Equals, false)
	// Remove works on an uninitialized Strings
	uninitialized.Remove("foo")

	var other set.Strings
	// Union returns a new set that is empty but initialized.
	c.Assert(uninitialized.Union(other), DeepEquals, set.NewStrings())
	c.Assert(uninitialized.Intersection(other), DeepEquals, set.NewStrings())
	c.Assert(uninitialized.Difference(other), DeepEquals, set.NewStrings())

	other = set.NewStrings("foo", "bar")
	c.Assert(uninitialized.Union(other), DeepEquals, other)
	c.Assert(uninitialized.Intersection(other), DeepEquals, set.NewStrings())
	c.Assert(uninitialized.Difference(other), DeepEquals, set.NewStrings())
	c.Assert(other.Union(uninitialized), DeepEquals, other)
	c.Assert(other.Intersection(uninitialized), DeepEquals, set.NewStrings())
	c.Assert(other.Difference(uninitialized), DeepEquals, other)

	// Once something is added, the set becomes initialized.
	uninitialized.Add("foo")
	AssertValues(c, uninitialized, "foo")
}
Example #2
0
// Helper methods for the tests.
func AssertValues(c *C, s set.Strings, expected ...string) {
	values := s.Values()
	// Expect an empty slice, not a nil slice for values.
	if expected == nil {
		expected = []string{}
	}
	sort.Strings(expected)
	sort.Strings(values)
	c.Assert(values, DeepEquals, expected)
	c.Assert(s.Size(), Equals, len(expected))
	// Check the sorted values too.
	sorted := s.SortedValues()
	c.Assert(sorted, DeepEquals, expected)
}