mirror of https://github.com/hak5/bolt.git
130 lines
4.8 KiB
Go
130 lines
4.8 KiB
Go
package bolt
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import (
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"testing"
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"unsafe"
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"github.com/stretchr/testify/assert"
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)
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// Ensure that a node can insert a key/value.
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func TestNode_put(t *testing.T) {
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n := &node{inodes: make(inodes, 0), bucket: &Bucket{tx: &Tx{meta: &meta{pgid: 1}}}}
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n.put([]byte("baz"), []byte("baz"), []byte("2"), 0, 0)
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n.put([]byte("foo"), []byte("foo"), []byte("0"), 0, 0)
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n.put([]byte("bar"), []byte("bar"), []byte("1"), 0, 0)
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n.put([]byte("foo"), []byte("foo"), []byte("3"), 0, leafPageFlag)
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assert.Equal(t, len(n.inodes), 3)
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assert.Equal(t, n.inodes[0].key, []byte("bar"))
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assert.Equal(t, n.inodes[0].value, []byte("1"))
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assert.Equal(t, n.inodes[1].key, []byte("baz"))
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assert.Equal(t, n.inodes[1].value, []byte("2"))
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assert.Equal(t, n.inodes[2].key, []byte("foo"))
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assert.Equal(t, n.inodes[2].value, []byte("3"))
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assert.Equal(t, n.inodes[2].flags, uint32(leafPageFlag))
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}
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// Ensure that a node can deserialize from a leaf page.
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func TestNode_read_LeafPage(t *testing.T) {
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// Create a page.
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var buf [4096]byte
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page := (*page)(unsafe.Pointer(&buf[0]))
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page.flags = leafPageFlag
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page.count = 2
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// Insert 2 elements at the beginning. sizeof(leafPageElement) == 16
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nodes := (*[3]leafPageElement)(unsafe.Pointer(&page.ptr))
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nodes[0] = leafPageElement{flags: 0, pos: 32, ksize: 3, vsize: 4} // pos = sizeof(leafPageElement) * 2
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nodes[1] = leafPageElement{flags: 0, pos: 23, ksize: 10, vsize: 3} // pos = sizeof(leafPageElement) + 3 + 4
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// Write data for the nodes at the end.
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data := (*[4096]byte)(unsafe.Pointer(&nodes[2]))
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copy(data[:], []byte("barfooz"))
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copy(data[7:], []byte("helloworldbye"))
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// Deserialize page into a leaf.
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n := &node{}
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n.read(page)
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// Check that there are two inodes with correct data.
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assert.True(t, n.isLeaf)
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assert.Equal(t, len(n.inodes), 2)
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assert.Equal(t, n.inodes[0].key, []byte("bar"))
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assert.Equal(t, n.inodes[0].value, []byte("fooz"))
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assert.Equal(t, n.inodes[1].key, []byte("helloworld"))
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assert.Equal(t, n.inodes[1].value, []byte("bye"))
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}
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// Ensure that a node can serialize into a leaf page.
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func TestNode_write_LeafPage(t *testing.T) {
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// Create a node.
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n := &node{isLeaf: true, inodes: make(inodes, 0), bucket: &Bucket{tx: &Tx{db: &DB{}, meta: &meta{pgid: 1}}}}
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n.put([]byte("susy"), []byte("susy"), []byte("que"), 0, 0)
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n.put([]byte("ricki"), []byte("ricki"), []byte("lake"), 0, 0)
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n.put([]byte("john"), []byte("john"), []byte("johnson"), 0, 0)
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// Write it to a page.
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var buf [4096]byte
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p := (*page)(unsafe.Pointer(&buf[0]))
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n.write(p)
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// Read the page back in.
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n2 := &node{}
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n2.read(p)
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// Check that the two pages are the same.
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assert.Equal(t, len(n2.inodes), 3)
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assert.Equal(t, n2.inodes[0].key, []byte("john"))
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assert.Equal(t, n2.inodes[0].value, []byte("johnson"))
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assert.Equal(t, n2.inodes[1].key, []byte("ricki"))
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assert.Equal(t, n2.inodes[1].value, []byte("lake"))
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assert.Equal(t, n2.inodes[2].key, []byte("susy"))
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assert.Equal(t, n2.inodes[2].value, []byte("que"))
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}
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// Ensure that a node can split into appropriate subgroups.
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func TestNode_split(t *testing.T) {
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// Create a node.
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n := &node{inodes: make(inodes, 0), bucket: &Bucket{tx: &Tx{db: &DB{}, meta: &meta{pgid: 1}}}}
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n.put([]byte("00000001"), []byte("00000001"), []byte("0123456701234567"), 0, 0)
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n.put([]byte("00000002"), []byte("00000002"), []byte("0123456701234567"), 0, 0)
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n.put([]byte("00000003"), []byte("00000003"), []byte("0123456701234567"), 0, 0)
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n.put([]byte("00000004"), []byte("00000004"), []byte("0123456701234567"), 0, 0)
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n.put([]byte("00000005"), []byte("00000005"), []byte("0123456701234567"), 0, 0)
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// Split between 2 & 3.
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n.split(100)
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var parent = n.parent
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assert.Equal(t, len(parent.children), 2)
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assert.Equal(t, len(parent.children[0].inodes), 2)
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assert.Equal(t, len(parent.children[1].inodes), 3)
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}
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// Ensure that a page with the minimum number of inodes just returns a single node.
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func TestNode_split_MinKeys(t *testing.T) {
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// Create a node.
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n := &node{inodes: make(inodes, 0), bucket: &Bucket{tx: &Tx{db: &DB{}, meta: &meta{pgid: 1}}}}
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n.put([]byte("00000001"), []byte("00000001"), []byte("0123456701234567"), 0, 0)
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n.put([]byte("00000002"), []byte("00000002"), []byte("0123456701234567"), 0, 0)
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// Split.
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n.split(20)
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assert.Nil(t, n.parent)
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}
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// Ensure that a node that has keys that all fit on a page just returns one leaf.
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func TestNode_split_SinglePage(t *testing.T) {
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// Create a node.
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n := &node{inodes: make(inodes, 0), bucket: &Bucket{tx: &Tx{db: &DB{}, meta: &meta{pgid: 1}}}}
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n.put([]byte("00000001"), []byte("00000001"), []byte("0123456701234567"), 0, 0)
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n.put([]byte("00000002"), []byte("00000002"), []byte("0123456701234567"), 0, 0)
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n.put([]byte("00000003"), []byte("00000003"), []byte("0123456701234567"), 0, 0)
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n.put([]byte("00000004"), []byte("00000004"), []byte("0123456701234567"), 0, 0)
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n.put([]byte("00000005"), []byte("00000005"), []byte("0123456701234567"), 0, 0)
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// Split.
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n.split(4096)
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assert.Nil(t, n.parent)
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}
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