diff --git a/utils/misc/src/test/java/org/onlab/graph/TestDoubleWeight.java b/utils/misc/src/test/java/org/onlab/graph/TestDoubleWeight.java
new file mode 100644
index 0000000..54f9f17
--- /dev/null
+++ b/utils/misc/src/test/java/org/onlab/graph/TestDoubleWeight.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * 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 org.onlab.graph;
+
+import com.google.common.math.DoubleMath;
+
+import java.util.Objects;
+
+/**
+ * Test weight (based on double).
+ */
+public class TestDoubleWeight implements Weight {
+
+    /**
+     * Instance of negative test weight.
+     */
+    public static final TestDoubleWeight NEGATIVE_WEIGHT = new TestDoubleWeight(-1);
+
+    /**
+     * Instance of test weight to mark links/paths which
+     * can not be traversed.
+     */
+    public static final TestDoubleWeight NON_VIABLE_WEIGHT =
+            new TestDoubleWeight(Double.POSITIVE_INFINITY);
+
+    private final double value;
+
+    /**
+     * Creates a new test weight with the given double value.
+     * @param value double weight
+     */
+    public TestDoubleWeight(double value) {
+        this.value = value;
+    }
+
+    @Override
+    public Weight merge(Weight otherWeight) {
+        return new TestDoubleWeight(value + ((TestDoubleWeight) otherWeight).value);
+    }
+
+    @Override
+    public Weight subtract(Weight otherWeight) {
+        return new TestDoubleWeight(value - ((TestDoubleWeight) otherWeight).value);
+    }
+
+    @Override
+    public boolean isViable() {
+        return this != NON_VIABLE_WEIGHT;
+    }
+
+    @Override
+    public int compareTo(Weight otherWeight) {
+        return Double.compare(value, ((TestDoubleWeight) otherWeight).value);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return (DoubleMath.fuzzyEquals(value, ((TestDoubleWeight) obj).value, 0.1));
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(value);
+    }
+
+    @Override
+    public boolean isNegative() {
+        return value < 0;
+    }
+}