go: Ability to import a pre-defined Graph.

With this change, it should be possible to execute
a pre-defined Graph created by any means (like a
training session in a Python program) in Go.

One more step towards #10
Change: 134096795

1 files changed, 64 insertions, 0 deletions

diff --git a/tensorflow/go/graph_test.go b/tensorflow/go/graph_test.go
new file mode 100644
index 0000000000..43f80ff4eb
--- /dev/null
+++ b/tensorflow/go/graph_test.go
@@ -0,0 +1,64 @@
+// Copyright 2016 The TensorFlow Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tensorflow
+
+import (
+	"bytes"
+	"fmt"
+	"testing"
+)
+
+func hasOperations(g *Graph, ops ...string) error {
+	var missing []string
+	for _, op := range ops {
+		if g.Operation(op) == nil {
+			missing = append(missing, op)
+		}
+	}
+	if len(missing) == 0 {
+		return nil
+	}
+	return fmt.Errorf("Graph does not have the operations %v", missing)
+}
+
+func TestGraphWriteToAndImport(t *testing.T) {
+	// Construct a graph
+	g := NewGraph()
+	v, err := NewTensor(int64(1))
+	if err != nil {
+		t.Fatal(err)
+	}
+	input, err := Placeholder(g, "input", v.DataType())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := Neg(g, "neg", input); err != nil {
+		t.Fatal(err)
+	}
+
+	// Serialize the graph
+	buf := new(bytes.Buffer)
+	if _, err := g.WriteTo(buf); err != nil {
+		t.Fatal(err)
+	}
+
+	// Import it into the same graph, with a prefix
+	if err := g.Import(buf.Bytes(), "imported"); err != nil {
+		t.Error(err)
+	}
+	if err := hasOperations(g, "input", "neg", "imported/input", "imported/neg"); err != nil {
+		t.Error(err)
+	}
+}