mirror of https://github.com/etcd-io/bbolt.git
125 lines
3.9 KiB
Go
125 lines
3.9 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 leaf can insert a key/value.
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func TestLeafPut(t *testing.T) {
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l := &leaf{items: make(leafItems, 0)}
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l.put([]byte("baz"), []byte("2"))
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l.put([]byte("foo"), []byte("0"))
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l.put([]byte("bar"), []byte("1"))
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l.put([]byte("foo"), []byte("3"))
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assert.Equal(t, len(l.items), 3)
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assert.Equal(t, l.items[0], leafItem{[]byte("bar"), []byte("1")})
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assert.Equal(t, l.items[1], leafItem{[]byte("baz"), []byte("2")})
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assert.Equal(t, l.items[2], leafItem{[]byte("foo"), []byte("3")})
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}
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// Ensure that a leaf can deserialize from a page.
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func TestLeafRead(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.count = 2
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// Insert 2 leaf items at the beginning. sizeof(lnode) == 16
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nodes := (*[3]lnode)(unsafe.Pointer(&page.ptr))
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nodes[0] = lnode{flags: 0, pos: 32, ksize: 3, vsize: 4} // pos = sizeof(lnode) * 2
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nodes[1] = lnode{flags: 0, pos: 23, ksize: 10, vsize: 3} // pos = sizeof(lnode) + 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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l := &leaf{}
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l.read(page)
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// Check that there are two items with correct data.
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assert.Equal(t, len(l.items), 2)
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assert.Equal(t, l.items[0].key, []byte("bar"))
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assert.Equal(t, l.items[0].value, []byte("fooz"))
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assert.Equal(t, l.items[1].key, []byte("helloworld"))
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assert.Equal(t, l.items[1].value, []byte("bye"))
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}
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// Ensure that a leaf can serialize itself.
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func TestLeafWrite(t *testing.T) {
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// Create a leaf.
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l := &leaf{items: make(leafItems, 0)}
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l.put([]byte("susy"), []byte("que"))
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l.put([]byte("ricki"), []byte("lake"))
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l.put([]byte("john"), []byte("johnson"))
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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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l.write(p)
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// Read the page back in.
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l2 := &leaf{}
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l2.read(p)
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// Check that the two pages are the same.
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assert.Equal(t, len(l2.items), 3)
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assert.Equal(t, l2.items[0].key, []byte("john"))
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assert.Equal(t, l2.items[0].value, []byte("johnson"))
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assert.Equal(t, l2.items[1].key, []byte("ricki"))
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assert.Equal(t, l2.items[1].value, []byte("lake"))
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assert.Equal(t, l2.items[2].key, []byte("susy"))
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assert.Equal(t, l2.items[2].value, []byte("que"))
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}
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// Ensure that a leaf can split into appropriate subgroups.
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func TestLeafSplit(t *testing.T) {
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// Create a leaf.
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l := &leaf{items: make(leafItems, 0)}
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l.put([]byte("00000001"), []byte("0123456701234567"))
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l.put([]byte("00000002"), []byte("0123456701234567"))
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l.put([]byte("00000003"), []byte("0123456701234567"))
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l.put([]byte("00000004"), []byte("0123456701234567"))
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l.put([]byte("00000005"), []byte("0123456701234567"))
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// Split between 3 & 4.
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leafs := l.split(100)
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assert.Equal(t, len(leafs), 2)
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assert.Equal(t, len(leafs[0].items), 2)
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assert.Equal(t, len(leafs[1].items), 3)
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}
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// Ensure that a leaf with the minimum number of items just returns a single leaf.
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func TestLeafSplitWithMinKeys(t *testing.T) {
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// Create a leaf.
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l := &leaf{items: make(leafItems, 0)}
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l.put([]byte("00000001"), []byte("0123456701234567"))
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l.put([]byte("00000002"), []byte("0123456701234567"))
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// Split.
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leafs := l.split(20)
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assert.Equal(t, len(leafs), 1)
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assert.Equal(t, len(leafs[0].items), 2)
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}
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// Ensure that a leaf that has keys that all fit on a page just returns one leaf.
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func TestLeafSplitFitsInPage(t *testing.T) {
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// Create a leaf.
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l := &leaf{items: make(leafItems, 0)}
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l.put([]byte("00000001"), []byte("0123456701234567"))
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l.put([]byte("00000002"), []byte("0123456701234567"))
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l.put([]byte("00000003"), []byte("0123456701234567"))
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l.put([]byte("00000004"), []byte("0123456701234567"))
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l.put([]byte("00000005"), []byte("0123456701234567"))
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// Split.
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leafs := l.split(4096)
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assert.Equal(t, len(leafs), 1)
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assert.Equal(t, len(leafs[0].items), 5)
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}
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