bleve/index/upside_down/reader_test.go

//  Copyright (c) 2014 Couchbase, Inc.
//  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
//  except in compliance with the License. You may obtain a copy of the License at
//    http://www.apache.org/licenses/LICENSE-2.0
//  Unless required by applicable law or agreed to in writing, software distributed under the
//  License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
//  either express or implied. See the License for the specific language governing permissions
//  and limitations under the License.

package upside_down

import (
	"reflect"
	"testing"

	"github.com/blevesearch/bleve/document"
	"github.com/blevesearch/bleve/index"
	"github.com/blevesearch/bleve/index/store/boltdb"
)

func TestIndexReader(t *testing.T) {
	defer func() {
		err := DestroyTest()
		if err != nil {
			t.Fatal(err)
		}
	}()

	analysisQueue := index.NewAnalysisQueue(1)
	idx, err := NewUpsideDownCouch(boltdb.Name, boltTestConfig, analysisQueue)
	if err != nil {
		t.Fatal(err)
	}
	err = idx.Open()
	if err != nil {
		t.Errorf("error opening index: %v", err)
	}
	defer func() {
		err := idx.Close()
		if err != nil {
			t.Fatal(err)
		}
	}()

	var expectedCount uint64
	doc := document.NewDocument("1")
	doc.AddField(document.NewTextField("name", []uint64{}, []byte("test")))
	err = idx.Update(doc)
	if err != nil {
		t.Errorf("Error updating index: %v", err)
	}
	expectedCount++

	doc = document.NewDocument("2")
	doc.AddField(document.NewTextFieldWithAnalyzer("name", []uint64{}, []byte("test test test"), testAnalyzer))
	doc.AddField(document.NewTextFieldCustom("desc", []uint64{}, []byte("eat more rice"), document.IndexField|document.IncludeTermVectors, testAnalyzer))
	err = idx.Update(doc)
	if err != nil {
		t.Errorf("Error updating index: %v", err)
	}
	expectedCount++

	indexReader, err := idx.Reader()
	if err != nil {
		t.Error(err)
	}
	defer func() {
		err := indexReader.Close()
		if err != nil {
			t.Fatal(err)
		}
	}()

	// first look for a term that doesn't exist
	reader, err := indexReader.TermFieldReader([]byte("nope"), "name", true, true, true)
	if err != nil {
		t.Errorf("Error accessing term field reader: %v", err)
	}
	count := reader.Count()
	if count != 0 {
		t.Errorf("Expected doc count to be: %d got: %d", 0, count)
	}
	err = reader.Close()
	if err != nil {
		t.Fatal(err)
	}

	reader, err = indexReader.TermFieldReader([]byte("test"), "name", true, true, true)
	if err != nil {
		t.Errorf("Error accessing term field reader: %v", err)
	}

	expectedCount = 2
	count = reader.Count()
	if count != expectedCount {
		t.Errorf("Exptected doc count to be: %d got: %d", expectedCount, count)
	}

	var match *index.TermFieldDoc
	var actualCount uint64
	match, err = reader.Next(nil)
	for err == nil && match != nil {
		match, err = reader.Next(nil)
		if err != nil {
			t.Errorf("unexpected error reading next")
		}
		actualCount++
	}
	if actualCount != count {
		t.Errorf("count was 2, but only saw %d", actualCount)
	}

	expectedMatch := &index.TermFieldDoc{
		ID:   InternalId("2"),
		Freq: 1,
		Norm: 0.5773502588272095,
		Vectors: []*index.TermFieldVector{
			{
				Field: "desc",
				Pos:   3,
				Start: 9,
				End:   13,
			},
		},
	}
	tfr, err := indexReader.TermFieldReader([]byte("rice"), "desc", true, true, true)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	match, err = tfr.Next(nil)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	if !reflect.DeepEqual(expectedMatch, match) {
		t.Errorf("got %#v, expected %#v", match, expectedMatch)
	}
	err = reader.Close()
	if err != nil {
		t.Fatal(err)
	}

	// now test usage of advance
	reader, err = indexReader.TermFieldReader([]byte("test"), "name", true, true, true)
	if err != nil {
		t.Errorf("Error accessing term field reader: %v", err)
	}

	match, err = reader.Advance(InternalId("2"), nil)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	if match == nil {
		t.Fatalf("Expected match, got nil")
	}
	if !match.ID.Equals(InternalId("2")) {
		t.Errorf("Expected ID '2', got '%s'", match.ID)
	}
	match, err = reader.Advance(InternalId("3"), nil)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	if match != nil {
		t.Errorf("expected nil, got %v", match)
	}
	err = reader.Close()
	if err != nil {
		t.Fatal(err)
	}

	// now test creating a reader for a field that doesn't exist
	reader, err = indexReader.TermFieldReader([]byte("water"), "doesnotexist", true, true, true)
	if err != nil {
		t.Errorf("Error accessing term field reader: %v", err)
	}
	count = reader.Count()
	if count != 0 {
		t.Errorf("expected count 0 for reader of non-existant field")
	}
	match, err = reader.Next(nil)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	if match != nil {
		t.Errorf("expected nil, got %v", match)
	}
	match, err = reader.Advance(InternalId("anywhere"), nil)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	if match != nil {
		t.Errorf("expected nil, got %v", match)
	}

}

func TestIndexDocIdReader(t *testing.T) {
	defer func() {
		err := DestroyTest()
		if err != nil {
			t.Fatal(err)
		}
	}()

	analysisQueue := index.NewAnalysisQueue(1)
	idx, err := NewUpsideDownCouch(boltdb.Name, boltTestConfig, analysisQueue)
	if err != nil {
		t.Fatal(err)
	}
	err = idx.Open()
	if err != nil {
		t.Errorf("error opening index: %v", err)
	}
	defer func() {
		err := idx.Close()
		if err != nil {
			t.Fatal(err)
		}
	}()

	var expectedCount uint64
	doc := document.NewDocument("1")
	doc.AddField(document.NewTextField("name", []uint64{}, []byte("test")))
	err = idx.Update(doc)
	if err != nil {
		t.Errorf("Error updating index: %v", err)
	}
	expectedCount++

	doc = document.NewDocument("2")
	doc.AddField(document.NewTextField("name", []uint64{}, []byte("test test test")))
	doc.AddField(document.NewTextFieldWithIndexingOptions("desc", []uint64{}, []byte("eat more rice"), document.IndexField|document.IncludeTermVectors))
	err = idx.Update(doc)
	if err != nil {
		t.Errorf("Error updating index: %v", err)
	}
	expectedCount++

	indexReader, err := idx.Reader()
	if err != nil {
		t.Error(err)
	}
	defer func() {
		err := indexReader.Close()
		if err != nil {
			t.Error(err)
		}
	}()

	// first get all doc ids
	reader, err := indexReader.DocIDReader("", "")
	if err != nil {
		t.Errorf("Error accessing doc id reader: %v", err)
	}
	defer func() {
		err := reader.Close()
		if err != nil {
			t.Fatal(err)
		}
	}()

	id, err := reader.Next()
	count := uint64(0)
	for id != nil {
		count++
		id, err = reader.Next()
	}
	if count != expectedCount {
		t.Errorf("expected %d, got %d", expectedCount, count)
	}

	// try it again, but jump to the second doc this time
	reader2, err := indexReader.DocIDReader("", "")
	if err != nil {
		t.Errorf("Error accessing doc id reader: %v", err)
	}
	defer func() {
		err := reader2.Close()
		if err != nil {
			t.Error(err)
		}
	}()

	id, err = reader2.Advance(InternalId("2"))
	if err != nil {
		t.Error(err)
	}
	if !id.Equals(InternalId("2")) {
		t.Errorf("expected to find id '2', got '%s'", id)
	}

	id, err = reader2.Advance(InternalId("3"))
	if err != nil {
		t.Error(err)
	}
	if id != nil {
		t.Errorf("expected to find id '', got '%s'", id)
	}
}

func TestCrashBadBackIndexRow(t *testing.T) {
	br, err := NewBackIndexRowKV([]byte{byte('b'), byte('a'), ByteSeparator}, []byte{})
	if err != nil {
		t.Fatal(err)
	}
	if string(br.doc) != "a" {
		t.Fatal(err)
	}
}