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package tensor
import (
"fmt"
"testing"
"github.com/stretchr/testify/assert"
)
func TestShapeBasics(t *testing.T) {
var s Shape
var ds int
var err error
s = Shape{1, 2}
if ds, err = s.DimSize(0); err != nil {
t.Error(err)
}
if ds != 1 {
t.Error("Expected DimSize(0) to be 1")
}
if ds, err = s.DimSize(2); err == nil {
t.Error("Expected a DimensionMismatch error")
}
s = ScalarShape()
if ds, err = s.DimSize(0); err != nil {
t.Error(err)
}
if ds != 0 {
t.Error("Expected DimSize(0) of a scalar to be 0")
}
// format for completeness sake
s = Shape{2, 1}
if fmt.Sprintf("%d", s) != "[2 1]" {
t.Error("Shape.Format() error")
}
}
func TestShapeIsX(t *testing.T) {
assert := assert.New(t)
var s Shape
// scalar shape
s = Shape{}
assert.True(s.IsScalar())
assert.True(s.IsScalarEquiv())
assert.False(s.IsVector())
assert.False(s.IsColVec())
assert.False(s.IsRowVec())
// vectors
// scalar-equiv vector
s = Shape{1}
assert.False(s.IsScalar())
assert.True(s.IsScalarEquiv())
assert.True(s.IsVector())
assert.True(s.IsVectorLike())
assert.True(s.IsVector())
assert.False(s.IsColVec())
assert.False(s.IsRowVec())
// vanila vector
s = Shape{2}
assert.False(s.IsScalar())
assert.True(s.IsVector())
assert.False(s.IsColVec())
assert.False(s.IsRowVec())
// col vec
s = Shape{2, 1}
assert.False(s.IsScalar())
assert.True(s.IsVector())
assert.True(s.IsVectorLike())
assert.True(s.IsColVec())
assert.False(s.IsRowVec())
// row vec
s = Shape{1, 2}
assert.False(s.IsScalar())
assert.True(s.IsVector())
assert.True(s.IsVectorLike())
assert.False(s.IsColVec())
assert.True(s.IsRowVec())
// matrix and up
s = Shape{2, 2}
assert.False(s.IsScalar())
assert.False(s.IsVector())
assert.False(s.IsColVec())
assert.False(s.IsRowVec())
// scalar equiv matrix
s = Shape{1, 1}
assert.False(s.IsScalar())
assert.True(s.IsScalarEquiv())
assert.True(s.IsVectorLike())
assert.False(s.IsVector())
}
func TestShapeCalcStride(t *testing.T) {
assert := assert.New(t)
var s Shape
// scalar shape
s = Shape{}
assert.Nil(s.CalcStrides())
// vector shape
s = Shape{1}
assert.Equal([]int{1}, s.CalcStrides())
s = Shape{2, 1}
assert.Equal([]int{1, 1}, s.CalcStrides())
s = Shape{1, 2}
assert.Equal([]int{2, 1}, s.CalcStrides())
s = Shape{2}
assert.Equal([]int{1}, s.CalcStrides())
// matrix strides
s = Shape{2, 2}
assert.Equal([]int{2, 1}, s.CalcStrides())
s = Shape{5, 2}
assert.Equal([]int{2, 1}, s.CalcStrides())
// 3D strides
s = Shape{2, 3, 4}
assert.Equal([]int{12, 4, 1}, s.CalcStrides())
// stupid shape
s = Shape{-2, 1, 2}
fail := func() {
s.CalcStrides()
}
assert.Panics(fail)
}
func TestShapeEquality(t *testing.T) {
assert := assert.New(t)
var s1, s2 Shape
// scalar
s1 = Shape{}
s2 = Shape{}
assert.True(s1.Eq(s2))
assert.True(s2.Eq(s1))
// scalars and scalar equiv are not the same!
s1 = Shape{1}
s2 = Shape{}
assert.False(s1.Eq(s2))
assert.False(s2.Eq(s1))
// vector
s1 = Shape{3}
s2 = Shape{5}
assert.False(s1.Eq(s2))
assert.False(s2.Eq(s1))
s1 = Shape{2, 1}
s2 = Shape{2, 1}
assert.True(s1.Eq(s2))
assert.True(s2.Eq(s1))
s2 = Shape{2}
assert.True(s1.Eq(s2))
assert.True(s2.Eq(s1))
s2 = Shape{1, 2}
assert.False(s1.Eq(s2))
assert.False(s2.Eq(s1))
s1 = Shape{2}
assert.True(s1.Eq(s2))
assert.True(s2.Eq(s1))
s2 = Shape{2, 3}
assert.False(s1.Eq(s2))
assert.False(s2.Eq(s1))
// matrix
s1 = Shape{2, 3}
assert.True(s1.Eq(s2))
assert.True(s2.Eq(s1))
s2 = Shape{3, 2}
assert.False(s1.Eq(s2))
assert.False(s2.Eq(s1))
// just for that green coloured code
s1 = Shape{2}
s2 = Shape{1, 3}
assert.False(s1.Eq(s2))
assert.False(s2.Eq(s1))
}
var shapeSliceTests = []struct {
name string
s Shape
sli []Slice
expected Shape
err bool
}{
{"slicing a scalar shape", ScalarShape(), nil, ScalarShape(), false},
{"slicing a scalar shape", ScalarShape(), []Slice{rs{0, 0, 0}}, nil, true},
{"vec[0]", Shape{2}, []Slice{rs{0, 1, 0}}, ScalarShape(), false},
{"vec[3]", Shape{2}, []Slice{rs{3, 4, 0}}, nil, true},
{"vec[:, 0]", Shape{2}, []Slice{nil, rs{0, 1, 0}}, nil, true},
{"vec[1:4:2]", Shape{5}, []Slice{rs{1, 4, 2}}, ScalarShape(), false},
{"tensor[0, :, :]", Shape{1, 2, 2}, []Slice{rs{0, 1, 1}, nil, nil}, Shape{2, 2}, false},
{"tensor[:, 0, :]", Shape{1, 2, 2}, []Slice{nil, rs{0, 1, 1}, nil}, Shape{1, 2}, false},
{"tensor[0, :, :, :]", Shape{1, 1, 2, 2}, []Slice{rs{0, 1, 1}, nil, nil, nil}, Shape{1, 2, 2}, false},
{"tensor[0,]", Shape{1, 1, 2, 2}, []Slice{rs{0, 1, 1}}, Shape{1, 2, 2}, false},
}
func TestShape_Slice(t *testing.T) {
for i, ssts := range shapeSliceTests {
newShape, err := ssts.s.S(ssts.sli...)
if checkErr(t, ssts.err, err, "Shape slice", i) {
continue
}
if !ssts.expected.Eq(newShape) {
t.Errorf("Test %q: Expected shape %v. Got %v instead", ssts.name, ssts.expected, newShape)
}
}
}
var shapeRepeatTests = []struct {
name string
s Shape
repeats []int
axis int
expected Shape
expectedRepeats []int
expectedSize int
err bool
}{
{"scalar repeat on axis 0", ScalarShape(), []int{3}, 0, Shape{3}, []int{3}, 1, false},
{"scalar repeat on axis 1", ScalarShape(), []int{3}, 1, Shape{1, 3}, []int{3}, 1, false},
{"vector repeat on axis 0", Shape{2}, []int{3}, 0, Shape{6}, []int{3, 3}, 2, false},
{"vector repeat on axis 1", Shape{2}, []int{3}, 1, Shape{2, 3}, []int{3}, 1, false},
{"colvec repeats on axis 0", Shape{2, 1}, []int{3}, 0, Shape{6, 1}, []int{3, 3}, 2, false},
{"colvec repeats on axis 1", Shape{2, 1}, []int{3}, 1, Shape{2, 3}, []int{3}, 1, false},
{"rowvec repeats on axis 0", Shape{1, 2}, []int{3}, 0, Shape{3, 2}, []int{3}, 1, false},
{"rowvec repeats on axis 1", Shape{1, 2}, []int{3}, 1, Shape{1, 6}, []int{3, 3}, 2, false},
{"3-Tensor repeats", Shape{2, 3, 2}, []int{1, 2, 1}, 1, Shape{2, 4, 2}, []int{1, 2, 1}, 3, false},
{"3-Tensor generic repeats", Shape{2, 3, 2}, []int{2}, AllAxes, Shape{24}, []int{2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2}, 12, false},
{"3-Tensor generic repeat, axis specified", Shape{2, 3, 2}, []int{2}, 2, Shape{2, 3, 4}, []int{2, 2}, 2, false},
// stupids
{"nonexisting axis 2", Shape{2, 1}, []int{3}, 2, nil, nil, 0, true},
{"mismatching repeats", Shape{2, 3, 2}, []int{3, 1, 2}, 0, nil, nil, 0, true},
}
func TestShape_Repeat(t *testing.T) {
assert := assert.New(t)
for _, srts := range shapeRepeatTests {
newShape, reps, size, err := srts.s.Repeat(srts.axis, srts.repeats...)
switch {
case srts.err:
if err == nil {
t.Error("Expected an error")
}
continue
case !srts.err && err != nil:
t.Error(err)
continue
}
assert.True(srts.expected.Eq(newShape), "Test %q: Want: %v. Got %v", srts.name, srts.expected, newShape)
assert.Equal(srts.expectedRepeats, reps, "Test %q: ", srts.name)
assert.Equal(srts.expectedSize, size, "Test %q: ", srts.name)
}
}
var shapeConcatTests = []struct {
name string
s Shape
axis int
ss []Shape
expected Shape
err bool
}{
{"standard, axis 0 ", Shape{2, 2}, 0, []Shape{{2, 2}, {2, 2}}, Shape{6, 2}, false},
{"standard, axis 1 ", Shape{2, 2}, 1, []Shape{{2, 2}, {2, 2}}, Shape{2, 6}, false},
{"standard, axis AllAxes ", Shape{2, 2}, -1, []Shape{{2, 2}, {2, 2}}, Shape{6, 2}, false},
{"concat to empty", Shape{2}, 0, nil, Shape{2}, false},
{"stupids: different dims", Shape{2, 2}, 0, []Shape{{2, 3, 2}}, nil, true},
{"stupids: negative axes", Shape{2, 2}, -5, []Shape{{2, 2}}, nil, true},
{"stupids: toobig axis", Shape{2, 2}, 5, []Shape{{2, 2}}, nil, true},
{"subtle stupids: dim mismatch", Shape{2, 2}, 0, []Shape{{2, 2}, {2, 3}}, nil, true},
}
func TestShape_Concat(t *testing.T) {
assert := assert.New(t)
for _, scts := range shapeConcatTests {
newShape, err := scts.s.Concat(scts.axis, scts.ss...)
switch {
case scts.err:
if err == nil {
t.Error("Expected an error")
}
continue
case !scts.err && err != nil:
t.Error(err)
continue
}
assert.Equal(scts.expected, newShape)
}
}
|
