Add tests for dfs

mgechev · mgechev · commit 67bddfc17c24 · 2014-03-20T15:36:39.000+02:00
diff --git a/test/graphs/searching/dfs.spec.js b/test/graphs/searching/dfs.spec.js
@@ -0,0 +1,58 @@
+'use strict';
+
+var sampleGraph = [[1, 1, 1, 0, 0, 0],
+                   [0, 1, 1, 1, 0, 0],
+                   [1, 0, 1, 1, 1, 0],
+                   [0, 1, 0, 1, 1, 0],
+                   [0, 1, 0, 1, 1, 0],
+                   [0, 1, 0, 1, 1, 0],
+                   [0, 0, 1, 1, 1, 1],
+                   [0, 0, 0, 0, 1, 1]];
+
+var dfs = require('../../../src/graphs/searching/dfs').depthFirstSearch;
+
+describe('dfs', function () {
+
+  it('should work with incorrect input', function () {
+    expect(function () {
+      dfs(null, [1, 1], [1, 1]);
+    }).toThrow();
+    expect(function () {
+      dfs(sampleGraph, [-1, -1], [0, 0]);
+    }).toThrow();
+    expect(function () {
+      dfs(sampleGraph, [0, -1], [-1, 0]);
+    }).toThrow();
+    expect(function () {
+      dfs(sampleGraph, [0, 0], [-1, 0]);
+    }).toThrow();
+    expect(function () {
+      dfs(sampleGraph, [0, 1000], [-1, 0]);
+    }).toThrow();
+    expect(function () {
+      dfs(sampleGraph, [100000, 1000], [-1, 0]);
+    }).toThrow();
+    expect(function () {
+      dfs(sampleGraph, [0, 0], [100, 100]);
+    }).toThrow();
+    expect(function () {
+      dfs(sampleGraph, [0, 0], [5, 5]);
+    }).not.toThrow();
+  });
+
+  it('should work with 1x1 matrix', function () {
+    var graph = [[1]];
+    expect(dfs(graph, [0, 0], [0, 0])).toBeTruthy();
+    graph = [[0]];
+    expect(dfs(graph, [0, 0], [0, 0])).toBeFalsy();
+  });
+
+  it('should work in the general case', function () {
+    expect(dfs(sampleGraph, [0, 0], [1, 1])).toBeTruthy();
+    expect(dfs(sampleGraph, [0, 0], [6, 5])).toBeTruthy();
+    expect(dfs(sampleGraph, [0, 0], [0, 5])).toBeFalsy();
+    expect(dfs(sampleGraph, [1, 1], [6, 5])).toBeTruthy();
+    expect(dfs(sampleGraph, [1, 1], [0, 5])).toBeFalsy();
+  });
+
+});
