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// Copyright 2013 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE file for details.
package set_test
import (
"sort"
"github.com/juju/testing"
gc "gopkg.in/check.v1"
"github.com/juju/utils/set"
)
type stringSetSuite struct {
testing.IsolationSuite
}
var _ = gc.Suite(stringSetSuite{})
// Helper methods for the tests.
func AssertValues(c *gc.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, gc.DeepEquals, expected)
c.Assert(s.Size(), gc.Equals, len(expected))
// Check the sorted values too.
sorted := s.SortedValues()
c.Assert(sorted, gc.DeepEquals, expected)
}
// Actual tests start here.
func (stringSetSuite) TestEmpty(c *gc.C) {
s := set.NewStrings()
AssertValues(c, s)
}
func (stringSetSuite) TestInitialValues(c *gc.C) {
values := []string{"foo", "bar", "baz"}
s := set.NewStrings(values...)
AssertValues(c, s, values...)
}
func (stringSetSuite) TestSize(c *gc.C) {
// Empty sets are empty.
s := set.NewStrings()
c.Assert(s.Size(), gc.Equals, 0)
// Size returns number of unique values.
s = set.NewStrings("foo", "foo", "bar")
c.Assert(s.Size(), gc.Equals, 2)
}
func (stringSetSuite) TestIsEmpty(c *gc.C) {
// Empty sets are empty.
s := set.NewStrings()
c.Assert(s.IsEmpty(), gc.Equals, true)
// Non-empty sets are not empty.
s = set.NewStrings("foo")
c.Assert(s.IsEmpty(), gc.Equals, false)
// Newly empty sets work too.
s.Remove("foo")
c.Assert(s.IsEmpty(), gc.Equals, true)
}
func (stringSetSuite) TestAdd(c *gc.C) {
s := set.NewStrings()
s.Add("foo")
s.Add("foo")
s.Add("bar")
AssertValues(c, s, "foo", "bar")
}
func (stringSetSuite) TestRemove(c *gc.C) {
s := set.NewStrings("foo", "bar")
s.Remove("foo")
AssertValues(c, s, "bar")
}
func (stringSetSuite) TestContains(c *gc.C) {
s := set.NewStrings("foo", "bar")
c.Assert(s.Contains("foo"), gc.Equals, true)
c.Assert(s.Contains("bar"), gc.Equals, true)
c.Assert(s.Contains("baz"), gc.Equals, false)
}
func (stringSetSuite) TestRemoveNonExistent(c *gc.C) {
s := set.NewStrings()
s.Remove("foo")
AssertValues(c, s)
}
func (stringSetSuite) TestUnion(c *gc.C) {
s1 := set.NewStrings("foo", "bar")
s2 := set.NewStrings("foo", "baz", "bang")
union1 := s1.Union(s2)
union2 := s2.Union(s1)
AssertValues(c, union1, "foo", "bar", "baz", "bang")
AssertValues(c, union2, "foo", "bar", "baz", "bang")
}
func (stringSetSuite) TestIntersection(c *gc.C) {
s1 := set.NewStrings("foo", "bar")
s2 := set.NewStrings("foo", "baz", "bang")
int1 := s1.Intersection(s2)
int2 := s2.Intersection(s1)
AssertValues(c, int1, "foo")
AssertValues(c, int2, "foo")
}
func (stringSetSuite) TestDifference(c *gc.C) {
s1 := set.NewStrings("foo", "bar")
s2 := set.NewStrings("foo", "baz", "bang")
diff1 := s1.Difference(s2)
diff2 := s2.Difference(s1)
AssertValues(c, diff1, "bar")
AssertValues(c, diff2, "baz", "bang")
}
func (stringSetSuite) TestUninitializedPanics(c *gc.C) {
f := func() {
var s set.Strings
s.Add("foo")
}
c.Assert(f, gc.PanicMatches, "uninitalised set")
}
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