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package roaring
// to run just these tests: go test -run TestSetUtil*
import (
"github.com/stretchr/testify/assert"
"testing"
)
func TestSetUtilDifference(t *testing.T) {
data1 := []uint16{0, 1, 2, 3, 4, 9}
data2 := []uint16{2, 3, 4, 5, 8, 9, 11}
result := make([]uint16, 0, len(data1)+len(data2))
expectedresult := []uint16{0, 1}
nl := difference(data1, data2, result)
result = result[:nl]
assert.Equal(t, expectedresult, result)
expectedresult = []uint16{5, 8, 11}
nl = difference(data2, data1, result)
result = result[:nl]
assert.Equal(t, expectedresult, result)
}
func TestSetUtilUnion(t *testing.T) {
data1 := []uint16{0, 1, 2, 3, 4, 9}
data2 := []uint16{2, 3, 4, 5, 8, 9, 11}
result := make([]uint16, 0, len(data1)+len(data2))
expectedresult := []uint16{0, 1, 2, 3, 4, 5, 8, 9, 11}
nl := union2by2(data1, data2, result)
result = result[:nl]
assert.Equal(t, expectedresult, result)
nl = union2by2(data2, data1, result)
result = result[:nl]
assert.Equal(t, expectedresult, result)
}
func TestSetUtilExclusiveUnion(t *testing.T) {
data1 := []uint16{0, 1, 2, 3, 4, 9}
data2 := []uint16{2, 3, 4, 5, 8, 9, 11}
result := make([]uint16, 0, len(data1)+len(data2))
expectedresult := []uint16{0, 1, 5, 8, 11}
nl := exclusiveUnion2by2(data1, data2, result)
result = result[:nl]
assert.Equal(t, expectedresult, result)
nl = exclusiveUnion2by2(data2, data1, result)
result = result[:nl]
assert.Equal(t, expectedresult, result)
}
func TestSetUtilIntersection(t *testing.T) {
data1 := []uint16{0, 1, 2, 3, 4, 9}
data2 := []uint16{2, 3, 4, 5, 8, 9, 11}
result := make([]uint16, 0, len(data1)+len(data2))
expectedresult := []uint16{2, 3, 4, 9}
nl := intersection2by2(data1, data2, result)
result = result[:nl]
result = result[:len(expectedresult)]
assert.Equal(t, expectedresult, result)
nl = intersection2by2(data2, data1, result)
result = result[:nl]
assert.Equal(t, expectedresult, result)
data1 = []uint16{4}
data2 = make([]uint16, 10000)
for i := range data2 {
data2[i] = uint16(i)
}
result = make([]uint16, 0, len(data1)+len(data2))
expectedresult = data1
nl = intersection2by2(data1, data2, result)
result = result[:nl]
assert.Equal(t, expectedresult, result)
nl = intersection2by2(data2, data1, result)
result = result[:nl]
assert.Equal(t, expectedresult, result)
}
func TestSetUtilIntersection2(t *testing.T) {
data1 := []uint16{0, 2, 4, 6, 8, 10, 12, 14, 16, 18}
data2 := []uint16{0, 3, 6, 9, 12, 15, 18}
result := make([]uint16, 0, len(data1)+len(data2))
expectedresult := []uint16{0, 6, 12, 18}
nl := intersection2by2(data1, data2, result)
result = result[:nl]
result = result[:len(expectedresult)]
assert.Equal(t, expectedresult, result)
}
func TestSetUtilBinarySearch(t *testing.T) {
data := make([]uint16, 256)
for i := range data {
data[i] = uint16(2 * i)
}
for i := 0; i < 2*len(data); i++ {
key := uint16(i)
loc := binarySearch(data, key)
if (key & 1) == 0 {
assert.Equal(t, int(key)/2, loc)
} else {
assert.Equal(t, -int(key)/2-2, loc)
}
}
}
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