Adds Operations() method to Graph

There is currently no way to list all of the operations in a graph
from the go api. This patch ads an Operations() method to retrieve the
list using the existing TF_GraphNextOperation c api. The graph_test
was modified to include testing this new method.

Signed-off-by: Vishvananda Ishaya Abrams <vishvananda@gmail.com>

1 files changed, 19 insertions, 3 deletions

diff --git a/tensorflow/go/graph_test.go b/tensorflow/go/graph_test.go
index c3120bc720..b8d65c54f6 100644
--- a/tensorflow/go/graph_test.go
+++ b/tensorflow/go/graph_test.go
@@ -29,10 +29,26 @@ func hasOperations(g *Graph, ops ...string) error {
 			missing = append(missing, op)
 		}
 	}
-	if len(missing) == 0 {
-		return nil
+	if len(missing) != 0 {
+		return fmt.Errorf("Graph does not have the operations %v", missing)
 	}
-	return fmt.Errorf("Graph does not have the operations %v", missing)
+
+	inList := map[string]bool{}
+	for _, op := range g.Operations() {
+		inList[op.Name()] = true
+	}
+
+	for _, op := range ops {
+		if !inList[op] {
+			missing = append(missing, op)
+		}
+	}
+
+	if len(missing) != 0 {
+		return fmt.Errorf("Operations %v are missing from graph.Operations()", missing)
+	}
+
+	return nil
 }
 
 func TestGraphWriteToAndImport(t *testing.T) {