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package tensor
import (
"testing"
"github.com/stretchr/testify/assert"
)
type selByIndicesTest struct {
Name string
Data interface{}
Shape Shape
Indices []int
Axis int
WillErr bool
Correct interface{}
CorrectShape Shape
}
var selByIndicesTests = []selByIndicesTest{
{Name: "Basic", Data: Range(Float64, 0, 4), Shape: Shape{2, 2}, Indices: []int{0, 1}, Axis: 0, WillErr: false,
Correct: []float64{0, 1, 2, 3}, CorrectShape: Shape{2, 2},
},
{Name: "3-tensor, axis 0", Data: Range(Float64, 0, 24), Shape: Shape{3, 2, 4}, Indices: []int{1, 1}, Axis: 0, WillErr: false,
Correct: []float64{8, 9, 10, 11, 12, 13, 14, 15, 8, 9, 10, 11, 12, 13, 14, 15}, CorrectShape: Shape{2, 2, 4}},
{Name: "3-tensor, axis 1", Data: Range(Float64, 0, 24), Shape: Shape{3, 2, 4}, Indices: []int{1, 1}, Axis: 1, WillErr: false,
Correct: []float64{4, 5, 6, 7, 4, 5, 6, 7, 12, 13, 14, 15, 12, 13, 14, 15, 20, 21, 22, 23, 20, 21, 22, 23}, CorrectShape: Shape{3, 2, 4}},
{Name: "3-tensor, axis 2", Data: Range(Float64, 0, 24), Shape: Shape{3, 2, 4}, Indices: []int{1, 1}, Axis: 2, WillErr: false,
Correct: []float64{1, 1, 5, 5, 9, 9, 13, 13, 17, 17, 21, 21}, CorrectShape: Shape{3, 2, 2}},
{Name: "Vector, axis 0", Data: Range(Int, 0, 5), Shape: Shape{5}, Indices: []int{1, 1}, Axis: 0, WillErr: false,
Correct: []int{1, 1}, CorrectShape: Shape{2}},
{Name: "Vector, axis 1", Data: Range(Int, 0, 5), Shape: Shape{5}, Indices: []int{1, 1}, Axis: 1, WillErr: true,
Correct: []int{1, 1}, CorrectShape: Shape{2}},
{Name: "(4,2) Matrix, with (10) indices", Data: Range(Float32, 0, 8), Shape: Shape{4, 2}, Indices: []int{1, 1, 1, 1, 0, 2, 2, 2, 2, 0}, Axis: 0, WillErr: false,
Correct: []float32{2, 3, 2, 3, 2, 3, 2, 3, 0, 1, 4, 5, 4, 5, 4, 5, 4, 5, 0, 1}, CorrectShape: Shape{10, 2}},
{Name: "(2,1) Matrx (colvec) with (10) indices", Data: Range(Float64, 0, 2), Shape: Shape{2, 1}, Indices: []int{1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, Axis: 0, WillErr: false,
Correct: []float64{1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, CorrectShape: Shape{10},
},
}
func TestDense_SelectByIndices(t *testing.T) {
assert := assert.New(t)
for i, tc := range selByIndicesTests {
T := New(WithShape(tc.Shape...), WithBacking(tc.Data))
indices := New(WithBacking(tc.Indices))
ret, err := ByIndices(T, indices, tc.Axis)
if checkErr(t, tc.WillErr, err, tc.Name, i) {
continue
}
assert.Equal(tc.Correct, ret.Data())
assert.True(tc.CorrectShape.Eq(ret.Shape()))
}
}
var selByIndicesBTests = []struct {
selByIndicesTest
CorrectGrad interface{}
CorrectGradShape Shape
}{
// Basic
{
CorrectGrad: []float64{1, 1, 1, 1},
},
// 3-tensor, axis 0
{
CorrectGrad: []float64{0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 2, 2, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0},
},
// 3-tensor, axis 1
{
CorrectGrad: []float64{0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, 2, 2, 2, 2},
},
// 3-tensor, axis 2
{
CorrectGrad: []float64{0, 2, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0},
},
// vector, axis 0
{
CorrectGrad: []int{0, 2, 0, 0, 0},
},
// vector, axis 1
{
CorrectGrad: []float32{4, 6, 8, 12, 8, 12, 0, 0},
},
// (4,2) Matrix with (10) indices
{
CorrectGrad: []float32{2, 2, 4, 4, 4, 4, 0, 0},
},
// (2, 1) Matrix (colvec) with (10) indices
{
CorrectGrad: []float64{0, 10},
},
}
func init() {
for i := range selByIndicesBTests {
selByIndicesBTests[i].selByIndicesTest = selByIndicesTests[i]
selByIndicesBTests[i].CorrectGradShape = selByIndicesTests[i].Shape
}
}
func TestDense_SelectByIndicesB(t *testing.T) {
assert := assert.New(t)
for i, tc := range selByIndicesBTests {
T := New(WithShape(tc.Shape...), WithBacking(tc.Data))
indices := New(WithBacking(tc.Indices))
ret, err := ByIndices(T, indices, tc.Axis)
if checkErr(t, tc.WillErr, err, tc.Name, i) {
continue
}
outGrad := ret.Clone().(*Dense)
switch outGrad.Dtype() {
case Float64:
outGrad.Memset(1.0)
case Float32:
outGrad.Memset(float32(1.0))
}
grad, err := ByIndicesB(T, outGrad, indices, tc.Axis)
if checkErr(t, tc.WillErr, err, tc.Name, i) {
continue
}
assert.Equal(tc.CorrectGrad, grad.Data(), "%v - x:\n%v\nindices:\n%#v\ny:\n%#v\ngrad:\n%v", tc.Name, T, indices, ret, grad)
assert.True(tc.CorrectGradShape.Eq(grad.Shape()), "%v - Grad shape should be %v. Got %v instead.\n\nx:\n%v\nindices:\n%#v\ny:\n%#v\ngrad:\n%v", tc.Name, tc.CorrectGradShape, grad.Shape(), T, indices, ret, grad)
}
}
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