Exemplo n.º 1
0
func (suite *AnnoyTestSuite) TestFileHandling() {
	index := annoyindex.NewAnnoyIndexAngular(3)
	index.AddItem(0, []float32{0, 0, 1})
	index.AddItem(1, []float32{0, 1, 0})
	index.AddItem(2, []float32{1, 0, 0})
	index.Build(10)

	index.Save("go_test.ann")

	info, err := os.Stat("go_test.ann")
	if err != nil {
		assert.Fail(suite.T(), "Failed to create file, file not found")
	}
	if info.Size() == 0 {
		assert.Fail(suite.T(), "Failed to create file, file size zero")
	}

	annoyindex.DeleteAnnoyIndexAngular(index)

	index = annoyindex.NewAnnoyIndexAngular(3)
	if ret := index.Load("go_test.ann"); ret == false {
		assert.Fail(suite.T(), "Failed to load file")
	}
	annoyindex.DeleteAnnoyIndexAngular(index)

	os.Remove("go_test.ann")
}
Exemplo n.º 2
0
func (suite *AnnoyTestSuite) TestGetDistance() {
	index := annoyindex.NewAnnoyIndexAngular(2)
	index.AddItem(0, []float32{0, 1})
	index.AddItem(1, []float32{1, 1})
	index.Build(10)

	assert.Equal(suite.T(), RoundPlus(math.Pow(2*(1.0-math.Pow(2, -0.5)), 0.5), 3), RoundPlus(float64(index.GetDistance(0, 1)), 3))

	annoyindex.DeleteAnnoyIndexAngular(index)
}
Exemplo n.º 3
0
func (suite *AnnoyTestSuite) TestGetNnsByItem() {
	index := annoyindex.NewAnnoyIndexAngular(3)
	index.AddItem(0, []float32{2, 1, 0})
	index.AddItem(1, []float32{1, 2, 0})
	index.AddItem(2, []float32{0, 0, 1})
	index.Build(10)

	var result []int
	index.GetNnsByItem(0, 3, -1, &result)
	assert.Equal(suite.T(), []int{0, 1, 2}, result)

	index.GetNnsByItem(1, 3, -1, &result)
	assert.Equal(suite.T(), []int{1, 0, 2}, result)

	annoyindex.DeleteAnnoyIndexAngular(index)
}