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|
package bloom_test
import (
"errors"
"testing"
"lindenii.org/go/furgit/internal/format/packidx/bloom"
"lindenii.org/go/furgit/object/id"
)
func TestRecommendParams(t *testing.T) {
t.Parallel()
for _, format := range id.SupportedObjectFormats() {
t.Run(format.String(), func(t *testing.T) {
t.Parallel()
for _, n := range []int{0, 1, 1000, 10000, 1000000} {
bucketCount, k, err := bloom.RecommendParams(format, n)
if err != nil {
t.Fatalf("n=%d: %v", n, err)
}
if bucketCount == 0 || bucketCount&(bucketCount-1) != 0 {
t.Errorf("n=%d: bucket count %d not a power of two", n, bucketCount)
}
_, err = bloom.NewBuilder(format, bucketCount, k, make([]byte, format.Size()))
if err != nil {
t.Errorf("n=%d: recommended parameters rejected: %v", n, err)
}
}
})
}
}
func TestNewBuilderRejects(t *testing.T) {
t.Parallel()
cases := []struct {
name string
bucketCount uint32
k uint16
}{
{"zero buckets", 0, 8},
{"non power of two", 3, 8},
{"zero probe count", 4, 0},
}
for _, format := range id.SupportedObjectFormats() {
t.Run(format.String(), func(t *testing.T) {
t.Parallel()
for _, tc := range cases {
t.Run(tc.name, func(t *testing.T) {
t.Parallel()
_, err := bloom.NewBuilder(format, tc.bucketCount, tc.k, make([]byte, format.Size()))
if !errors.Is(err, bloom.ErrInvalidParameters) {
t.Fatalf("error = %v, want ErrInvalidParameters", err)
}
})
}
})
}
}
func TestNewBuilderBadPackHash(t *testing.T) {
t.Parallel()
defer func() {
if recover() == nil {
t.Fatal("NewBuilder did not panic on a short pack hash")
}
}()
_, _ = bloom.NewBuilder(id.ObjectFormatSHA256, 4, 2, make([]byte, id.ObjectFormatSHA256.Size()-1))
}
func TestAddBadLength(t *testing.T) {
t.Parallel()
builder, err := bloom.NewBuilder(id.ObjectFormatSHA256, 4, 2, make([]byte, id.ObjectFormatSHA256.Size()))
if err != nil {
t.Fatal(err)
}
defer func() {
if recover() == nil {
t.Fatal("Add did not panic on a short object ID")
}
}()
builder.Add(make([]byte, id.ObjectFormatSHA256.Size()-1))
}
|
