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node_test.go
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package art
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestNodeSetNext(t *testing.T) {
n := newNode(Node4, nil, nil)
for i := 255; i >= 0; i-- {
n.setNext(byte(i), newNode(Node4, nil, nil))
}
for i := 0; i < 256; i++ {
assert.NotNil(t, n.next(byte(i)))
}
}
func TestNode4Next(t *testing.T) {
n := newNode(Node4, nil, nil)
e := n.next(b("a"))
assert.Nil(t, e)
n = newNode(Node4, nil, nil)
n.getEdges().(*edges4).keys[0] = b("a")
n.getEdges().(*edges4).keys[1] = b("c")
n.getEdges().(*edges4).edges[0] = newNode(Node4, nil, nil)
n.getEdges().(*edges4).edges[1] = newNode(Node4, nil, nil)
n.getEdges().(*edges4).children = 2
e = n.next(b("a"))
assert.NotNil(t, e)
e = n.next(b("b"))
assert.Nil(t, e)
e = n.next(b("c"))
assert.NotNil(t, e)
}
func TestNode4SetNext(t *testing.T) {
n := newNode(Node4, nil, nil)
n.getEdges().(*edges4).keys[0] = b("a")
n.getEdges().(*edges4).keys[1] = b("c")
n.getEdges().(*edges4).edges[0] = newNode(Node4, nil, nil)
n.getEdges().(*edges4).edges[1] = newNode(Node4, nil, nil)
n.getEdges().(*edges4).children = uint8(2)
n.setNext(b("b"), newNode(Node4, nil, nil))
assert.Equal(t, b("a"), n.getEdges().(*edges4).keys[0])
assert.Equal(t, b("b"), n.getEdges().(*edges4).keys[1])
assert.Equal(t, b("c"), n.getEdges().(*edges4).keys[2])
assert.NotNil(t, n.getEdges().(*edges4).edges[0])
assert.NotNil(t, n.getEdges().(*edges4).edges[1])
assert.NotNil(t, n.getEdges().(*edges4).edges[2])
assert.Nil(t, n.getEdges().(*edges4).edges[3])
assert.Equal(t, uint8(3), n.getEdges().(*edges4).children)
}
func TestNode16Next(t *testing.T) {
n := newNode(Node16, nil, nil)
e := n.next(b("a"))
assert.Nil(t, e)
n = newNode(Node16, nil, nil)
n.getEdges().(*edges16).keys[0] = b("a")
n.getEdges().(*edges16).keys[1] = b("c")
n.getEdges().(*edges16).edges[0] = newNode(Node4, nil, nil)
n.getEdges().(*edges16).edges[1] = newNode(Node4, nil, nil)
n.getEdges().(*edges16).children = uint8(2)
e = n.next(b("a"))
assert.NotNil(t, e)
e = n.next(b("b"))
assert.Nil(t, e)
e = n.next(b("c"))
assert.NotNil(t, e)
}
func TestNode16SetNext(t *testing.T) {
n := newNode(Node16, nil, nil)
n.getEdges().(*edges16).keys[0] = b("a")
n.getEdges().(*edges16).keys[1] = b("c")
n.getEdges().(*edges16).edges[0] = newNode(Node4, nil, nil)
n.getEdges().(*edges16).edges[1] = newNode(Node4, nil, nil)
n.getEdges().(*edges16).children = uint8(2)
n.setNext(b("b"), newNode(Node4, nil, nil))
assert.Equal(t, b("a"), n.getEdges().(*edges16).keys[0])
assert.Equal(t, b("b"), n.getEdges().(*edges16).keys[1])
assert.Equal(t, b("c"), n.getEdges().(*edges16).keys[2])
assert.NotNil(t, n.getEdges().(*edges16).edges[0])
assert.NotNil(t, n.getEdges().(*edges16).edges[1])
assert.NotNil(t, n.getEdges().(*edges16).edges[2])
assert.Nil(t, n.getEdges().(*edges16).edges[3])
assert.Equal(t, uint8(3), n.getEdges().(*edges16).children)
n = newNode(Node4, nil, nil)
for x := 0; x < 8; x++ {
for i := 32; i > 16; i-- {
n.setNext(byte(i), newNode(Node4, nil, nil))
}
}
assert.Equal(t, uint8(16), n.getEdges().(*edges16).children)
}
func TestNode48Next(t *testing.T) {
n := newNode(Node48, nil, nil)
e := n.next(b("a"))
assert.Nil(t, e)
n = newNode(Node48, nil, nil)
n.getEdges().(*edges48).keys[0] = 1
n.getEdges().(*edges48).keys[1] = 0
n.getEdges().(*edges48).keys[2] = 2
n.getEdges().(*edges48).edges[0] = newNode(Node4, nil, nil)
n.getEdges().(*edges48).edges[1] = newNode(Node4, nil, nil)
n.getEdges().(*edges48).children = 2
e = n.next(byte(0))
assert.NotNil(t, e)
e = n.next(byte(1))
assert.Nil(t, e)
e = n.next(byte(2))
assert.NotNil(t, e)
}
func TestNode48SetNext(t *testing.T) {
n := newNode(Node48, nil, nil)
n.getEdges().(*edges48).keys[97] = 1
n.getEdges().(*edges48).keys[99] = 2
n.getEdges().(*edges48).edges[0] = newNode(Node4, nil, nil)
n.getEdges().(*edges48).edges[1] = newNode(Node4, nil, nil)
n.getEdges().(*edges48).children = 2
n.setNext(b("b"), newNode(Node4, nil, nil))
assert.Equal(t, uint8(1), n.getEdges().(*edges48).keys[97])
assert.Equal(t, uint8(3), n.getEdges().(*edges48).keys[98])
assert.Equal(t, uint8(2), n.getEdges().(*edges48).keys[99])
assert.NotNil(t, n.getEdges().(*edges48).edges[0])
assert.NotNil(t, n.getEdges().(*edges48).edges[1])
assert.NotNil(t, n.getEdges().(*edges48).edges[2])
assert.Nil(t, n.getEdges().(*edges48).edges[3])
assert.Equal(t, uint8(3), n.getEdges().(*edges48).children)
}
func TestNode256Next(t *testing.T) {
n := newNode(Node256, nil, nil)
e := n.next(b("a"))
assert.Nil(t, e)
n = newNode(Node256, nil, nil)
n.getEdges().(*edges256).edges[0] = newNode(Node4, nil, nil)
n.getEdges().(*edges256).edges[2] = newNode(Node4, nil, nil)
e = n.next(byte(0))
assert.NotNil(t, e)
e = n.next(byte(1))
assert.Nil(t, e)
e = n.next(byte(2))
assert.NotNil(t, e)
}
func TestNode256SetNext(t *testing.T) {
n := newNode(Node256, nil, nil)
n.getEdges().(*edges256).edges[97] = newNode(Node4, nil, nil)
n.getEdges().(*edges256).edges[99] = newNode(Node4, nil, nil)
n.getEdges().(*edges256).children = 2
n.setNext(b("b"), newNode(Node4, nil, nil))
assert.NotNil(t, n.getEdges().(*edges256).edges[97])
assert.NotNil(t, n.getEdges().(*edges256).edges[98])
assert.NotNil(t, n.getEdges().(*edges256).edges[99])
assert.Nil(t, n.getEdges().(*edges256).edges[3])
assert.Equal(t, uint8(3), n.getEdges().(*edges256).children)
}
func b(s string) byte {
return byte(s[0])
}