Function TestGraphAddGradientsWithInitialValues

tensorflow/go/graph_test.go:226–286

(t *testing.T)

}

func TestGraphAddGradientsWithInitialValues(t *testing.T) {
	g := NewGraph()
	x, err := Placeholder(g, "x", Float)
	op0, err := g.AddOperation(OpSpec{
		Type:  "Square",
		Name:  "y0",
		Input: []Input{x},
	})
	if err != nil {
		t.Fatal(err)
	}
	y0 := op0.Output(0)
	op1, err := g.AddOperation(OpSpec{
		Type:  "Square",
		Name:  "y1",
		Input: []Input{y0},
	})
	if err != nil {
		t.Fatal(err)
	}
	y1 := op1.Output(0)

	grads0, err := g.AddGradients("", []Output{y1}, []Output{y0}, nil)
	if err != nil {
		t.Fatal(err)
	}
	if len(grads0) != 1 {
		t.Fatal(len(grads0))
	}
	if grads0[0].DataType() != Float {
		t.Fatalf("Got DataType %v, wanted %v", grads0[0].DataType(), Float)
	}

	grads1, err := g.AddGradients("", []Output{y0}, []Output{x}, []Output{grads0[0]})
	if err != nil {
		t.Fatal(err)
	}
	if len(grads1) != 1 {
		t.Fatal(len(grads1))
	}
	if grads1[0].DataType() != Float {
		t.Fatalf("Got DataType %v, wanted %v", grads1[0].DataType(), Float)
	}

	sess, err := NewSession(g, nil)
	if err != nil {
		t.Fatal(err)
	}

	c, _ := NewTensor(float32(3.0))
	outputs, err := sess.Run(
		map[Output]*Tensor{x: c},
		[]Output{grads1[0]},
		nil)
	if err != nil {
		t.Fatal(err)
	}
	if outputs[0].Value().(float32) != 108.0 {