github.com/cayleygraph/cayley@v0.7.7/graph/iterator/linksto_test.go (about)

     1  // Copyright 2014 The Cayley Authors. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package iterator_test
    16  
    17  import (
    18  	"context"
    19  	"testing"
    20  
    21  	"github.com/cayleygraph/cayley/graph/graphmock"
    22  	. "github.com/cayleygraph/cayley/graph/iterator"
    23  	"github.com/cayleygraph/quad"
    24  )
    25  
    26  func TestLinksTo(t *testing.T) {
    27  	ctx := context.TODO()
    28  	qs := &graphmock.Oldstore{
    29  		Data: []string{1: "cool"},
    30  		Iter: NewFixed(),
    31  	}
    32  	qs.Iter.(*Fixed).Add(Int64Quad(2))
    33  	fixed := NewFixed()
    34  	val := qs.ValueOf(quad.Raw("cool"))
    35  	if val.(Int64Node) != 1 {
    36  		t.Fatalf("Failed to return correct value, got:%v expect:1", val)
    37  	}
    38  	fixed.Add(val)
    39  	lto := NewLinksTo(qs, fixed, quad.Object)
    40  	if !lto.Next(ctx) {
    41  		t.Error("At least one quad matches the fixed object")
    42  	}
    43  	val = lto.Result()
    44  	if val.(Int64Quad) != 2 {
    45  		t.Errorf("Quad index 2, such as %s, should match %s", qs.Quad(Int64Quad(2)), qs.Quad(val))
    46  	}
    47  }