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// Copyright 2014 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE file for details.
package set_test
import (
"sort"
"github.com/juju/testing"
jc "github.com/juju/testing/checkers"
gc "gopkg.in/check.v1"
"github.com/juju/utils/set"
)
type intSetSuite struct {
testing.IsolationSuite
}
var _ = gc.Suite(intSetSuite{})
// Helper methods for the tests.
func AssertIntValues(c *gc.C, s set.Ints, expected ...int) {
values := s.Values()
// Expect an empty slice, not a nil slice for values.
if expected == nil {
expected = []int{}
}
sort.Ints(expected)
sort.Ints(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 (intSetSuite) TestEmpty(c *gc.C) {
s := set.NewInts()
AssertIntValues(c, s)
}
func (intSetSuite) TestInitialValues(c *gc.C) {
values := []int{1, 2, 3}
s := set.NewInts(values...)
AssertIntValues(c, s, values...)
}
func (intSetSuite) TestSize(c *gc.C) {
// Empty sets are empty.
s := set.NewInts()
c.Assert(s.Size(), gc.Equals, 0)
// Size returns number of unique values.
s = set.NewInts(1, 1, 2)
c.Assert(s.Size(), gc.Equals, 2)
}
func (intSetSuite) TestIsEmpty(c *gc.C) {
// Empty sets are empty.
s := set.NewInts()
c.Assert(s.IsEmpty(), jc.IsTrue)
// Non-empty sets are not empty.
s = set.NewInts(1)
c.Assert(s.IsEmpty(), jc.IsFalse)
// Newly empty sets work too.
s.Remove(1)
c.Assert(s.IsEmpty(), jc.IsTrue)
}
func (intSetSuite) TestAdd(c *gc.C) {
s := set.NewInts()
s.Add(1)
s.Add(1)
s.Add(2)
AssertIntValues(c, s, 1, 2)
}
func (intSetSuite) TestRemove(c *gc.C) {
s := set.NewInts(1, 2)
s.Remove(1)
AssertIntValues(c, s, 2)
}
func (intSetSuite) TestContains(c *gc.C) {
s := set.NewInts(1, 2)
c.Assert(s.Contains(1), jc.IsTrue)
c.Assert(s.Contains(2), jc.IsTrue)
c.Assert(s.Contains(3), jc.IsFalse)
}
func (intSetSuite) TestRemoveNonExistent(c *gc.C) {
s := set.NewInts()
s.Remove(1)
AssertIntValues(c, s)
}
func (intSetSuite) TestUnion(c *gc.C) {
s1 := set.NewInts(1, 2)
s2 := set.NewInts(1, 3, 4)
union1 := s1.Union(s2)
union2 := s2.Union(s1)
AssertIntValues(c, union1, 1, 2, 3, 4)
AssertIntValues(c, union2, 1, 2, 3, 4)
}
func (intSetSuite) TestIntersection(c *gc.C) {
s1 := set.NewInts(1, 2)
s2 := set.NewInts(1, 3, 4)
int1 := s1.Intersection(s2)
int2 := s2.Intersection(s1)
AssertIntValues(c, int1, 1)
AssertIntValues(c, int2, 1)
}
func (intSetSuite) TestDifference(c *gc.C) {
s1 := set.NewInts(1, 2)
s2 := set.NewInts(1, 3, 4)
diff1 := s1.Difference(s2)
diff2 := s2.Difference(s1)
AssertIntValues(c, diff1, 2)
AssertIntValues(c, diff2, 3, 4)
}
func (intSetSuite) TestUninitializedPanics(c *gc.C) {
f := func() {
var s set.Ints
s.Add(1)
}
c.Assert(f, gc.PanicMatches, "uninitalised set")
}
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