Unit test fidelity of graph implementations

src/main/java/me/psanders/graph/BUILD

@@ -5,5 +5,6 @@ java_library(
         "//src/main/java/me/psanders:__pkg__",
         "//src/main/java/me/psanders/graph/path:__pkg__",
         "//src/test/java/me/psanders/graph/path:__pkg__",
+        "//src/test/java/me/psanders/graph:__pkg__",
     ]
 )

src/test/java/me/psanders/graph/BUILD

@@ -0,0 +1,17 @@
+java_library(
+    name = "utils_tests",
+    srcs = glob(["*.java"]),
+    deps = [
+        "//src/main/java/me/psanders/graph:graph",
+        "@junit//jar"
+    ],
+    visibility = []
+)
+
+java_test(
+    name = "GraphTest",
+    size = "small",
+    runtime_deps = [
+        ":utils_tests"
+    ]
+)

src/test/java/me/psanders/graph/GraphTest.java

@@ -1,5 +1,5 @@
 // Copyright: Peter Sanders. All rights reserved.
-// Date: 2017-10-13
+// Date: 2017-11-29
 
 package me.psanders.graph;
 
@@ -10,7 +10,10 @@
 
 import me.psanders.graph.Graph;
 import me.psanders.graph.MatrixGraph;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
 
+@RunWith(JUnit4.class)
 public class GraphTest {
 
   @Test
@@ -26,23 +29,23 @@ public void linkedGraphIsFaithful() {
   // If this fails then our insertion functions do not match our retrieval functions
   // i.e., `Graph.getWeight(X,Y)` searches
   private void testFidelity(Graph graph) {
-    assertNull(graph.getWeight(0, 0));
-    assertNull(graph.getWeight(0, 3));
-    assertNull(graph.getWeight(1, 1));
-    assertNull(graph.getWeight(2, 0));
-    assertNull(graph.getWeight(2, 2));
-    assertNull(graph.getWeight(3, 1));
-    assertNull(graph.getWeight(3, 2));
-    assertNull(graph.getWeight(3, 3));
-
-    assertEquals(graph.getWeight(0, 1), 2);
-    assertEquals(graph.getWeight(0, 2), 3);
-    assertEquals(graph.getWeight(1, 0), 1);
-    assertEquals(graph.getWeight(1, 2), 2);
-    assertEquals(graph.getWeight(1, 3), 3);
-    assertEquals(graph.getWeight(2, 1), 3);
-    assertEquals(graph.getWeight(2, 3), 4);
-    assertEquals(graph.getWeight(3, 0), 1);
+    assertNull(graph.getWeight("a", "a"));
+    assertNull(graph.getWeight("a", "d"));
+    assertNull(graph.getWeight("b", "b"));
+    assertNull(graph.getWeight("c", "a"));
+    assertNull(graph.getWeight("c", "c"));
+    assertNull(graph.getWeight("d", "b"));
+    assertNull(graph.getWeight("d", "c"));
+    assertNull(graph.getWeight("d", "d"));
+
+    assertEquals(2, graph.getWeight("a", "b"));
+    assertEquals(3, graph.getWeight("a", "c"));
+    assertEquals(1, graph.getWeight("b", "a"));
+    assertEquals(2, graph.getWeight("b", "c"));
+    assertEquals(3, graph.getWeight("b", "d"));
+    assertEquals(3, graph.getWeight("c", "b"));
+    assertEquals(4, graph.getWeight("c", "d"));
+    assertEquals(1, graph.getWeight("d", "a"));
   }
 
 }

src/test/java/me/psanders/graph/TestGraphFactory.java

@@ -39,7 +39,7 @@ Graph<String, Integer> getMatrixGraph() {
 
     vertices.put("a", 0);
     vertices.put("b", 1);
-    vertices.put("b", 2);
+    vertices.put("c", 2);
     vertices.put("d", 3);
 
     Integer[][] adjMatrix = {