func TestShouldBeCompatibleWeightPanicsForMatricsWithDifferentDimensions(t *testing.T) {
test := weightUpdateTest{
old: dense.Zeros(4, 8),
update: dense.Zeros(4, 10),
}
defer func() {
if p := recover(); p != INCOMPATIBLE_WEIGHTS_PANIC {
t.Fatalf("%s should be caused, but %s causes", INCOMPATIBLE_WEIGHTS_PANIC, p)
}
}()
ShouldBeCompatibleWeights(test.old, test.update)
}
func TestShouldBeCompatibleWeightSucceedsForSameShapeMatrices(t *testing.T) {
test := weightUpdateTest{
old: dense.Zeros(4, 8),
update: dense.Zeros(4, 8),
}
defer func() {
if p := recover(); p != nil {
t.Fatalf(
"Weights validation should not cause any panic for the same shape one: %s",
p,
)
}
}()
ShouldBeCompatibleWeights(test.old, test.update)
}
func TestShouldBeFeaturePanicsForNonFeature(t *testing.T) {
test := dense.Zeros(4, 1)
defer func() {
if p := recover(); p != NON_FEATURE_MATRIX_PANIC {
t.Fatalf("%s should be caused, but %s causes", NON_FEATURE_MATRIX_PANIC, p)
}
}()
ShouldBeFeature(test)
}
// Create a new classifier with the given number of classes and dimensions of features.
// The generate classifier has a weight matrix with zeros.
func New(classSize, dimensions int) *Classifier {
validates.ShouldBeOneOrMoreClasses(classSize)
c := &Classifier{
initialized: true,
// TODO: Replace the weights with the immutable version of dense matrix.
weights: dense.Zeros(classSize, dimensions),
}
return c
}
func TestWeightsReturnsTheWeightsMatrix(t *testing.T) {
test := constructionTest{
classSize: 4,
dimensions: 8,
}
c := New(test.classSize, test.dimensions)
zeroMatrix := dense.Zeros(test.classSize, test.dimensions)
if weights := c.Weights(); !weights.Equal(zeroMatrix) {
t.Fatalf("A %d x %d matrix should be returned as the weights matrix.", 4, 8)
}
}
func TestShouldBeFeatureSucceedsForFeature(t *testing.T) {
test := dense.Zeros(1, 1)
defer func() {
if p := recover(); p != nil {
t.Fatalf(
"Feature validation should not cause any panic for feature matirx: %s",
p,
)
}
}()
ShouldBeFeature(test)
}
func TestUnmarshalJSONFailsWithIncompatibleVersion(t *testing.T) {
c := &classifierJson{
Version: 99999,
Weights: dense.Zeros(4, 8),
}
d := &Classifier{}
b, _ := json.Marshal(c)
if err := json.Unmarshal(b, d); err == nil || err.Error() != IncompatibleVersionError {
t.Fatalf("Unmarshal can be applied to compatible-version classifier.")
}
}
func TestClassifyPanicsByNonFeatureMatrix(t *testing.T) {
classSize, dimensions := 4, 8
test := dense.Zeros(classSize, dimensions+1)
defer func() {
if p := recover(); p == NON_FEATURE_MATRIX_PANIC {
return
}
t.Fatal("Update should use \"validate.ShouldBeFeature\".")
}()
New(classSize, dimensions).Classify(test)
}
func TestUpdatePanicsByIncompatibleWeights(t *testing.T) {
classSize, dimensions := 4, 8
test := dense.Zeros(classSize+1, dimensions)
c := New(classSize, dimensions)
defer func() {
if p := recover(); p == INCOMPATIBLE_WEIGHTS_PANIC {
return
}
t.Fatal("Update should use \"validate.ShouldBeCompatibleWeights\".")
}()
c.Update(test)
}
func TestUpdateSucceedsForMatricesWithSameShape(t *testing.T) {
classSize, dimensions := 4, 8
test := dense.Zeros(classSize, dimensions)
c := New(classSize, dimensions)
defer func() {
if p := recover(); p == nil {
return
}
t.Fatal("Update should not panic for the weights as same shape as the old.")
}()
c.Update(test)
}
