Added complete-test.js & fixture.

`complete-test.js` correctly tests the modified `save()` method.  It is
an attempt at a more complete functional test of nconf.

.gitignore

@@ -1,7 +1,8 @@
 .DS_Store
 config.json
 test/fixtures/*.json
+!test/fixtures/complete.json
 !test/fixtures/malformed.json
 node_modules/
 node_modules/*
-npm-debug.log
+npm-debug.log

test/complete-test.js

@@ -0,0 +1,127 @@
+/*
+ * complete-test.js: Complete test with multiple providers
+ */
+
+var fs = require('fs'),
+    path = require('path'),
+    vows = require('vows'),
+    assert = require('assert'),
+    nconf = require('../lib/nconf'),
+    data = require('./fixtures/data').data,
+    helpers = require('./helpers');
+
+var complete = helpers.fixture('complete.json');
+var completeTest = helpers.fixture('complete-test.json');
+
+vows.describe('nconf').addBatch({
+  "When using the nconf with multiple providers": {
+    topic: function () {
+      var that = this;
+      helpers.cp(complete, completeTest, function () {
+        nconf.env();
+        nconf.file({file: completeTest});
+        nconf.use('argv', {type: 'literal', store: data});
+        that.callback();
+      });
+    },
+
+    "env vars": {
+      "are present": function () {
+        Object.keys(process.env).forEach(function (key) {
+          assert.equal(nconf.get(key), process.env[key]);
+        });
+      }
+    },
+
+    "json vars": {
+      topic: function () {
+        fs.readFile(complete, 'utf8', this.callback);
+      },
+
+      "are present": function (err, data) {
+        assert.isNull(err);
+        data = JSON.parse(data);
+        Object.keys(data).forEach(function (key) {
+          assert.deepEqual(nconf.get(key), data[key]);
+        });
+      }
+    },
+
+    "literal vars": {
+      "are present": function () {
+        Object.keys(data).forEach(function (key) {
+          assert.equal(nconf.get(key), data[key]);
+        });
+      }
+    },
+
+    "and saving *synchronously*": {
+      topic: function () {
+        nconf.set('weebls', 'stuff');
+        return nconf.save();
+      },
+
+      "correct return value": function (topic) {
+        Object.keys(topic).forEach(function (key) {
+          assert.deepEqual(topic[key], nconf.get(key));
+        });
+      },
+
+      "the file": {
+        topic: function () {
+          fs.readFile(completeTest, 'utf8', this.callback);
+        },
+
+        "saved correctly": function (err, data) {
+          data = JSON.parse(data);
+          Object.keys(data).forEach(function (key) {
+            assert.deepEqual(data[key], nconf.get(key));
+          });
+          assert.equal(nconf.get('weebls'), 'stuff');
+        }
+      }
+    }
+  }
+}).addBatch({
+  // Threw this in it's own batch to make sure it's run separately from the
+  // sync check
+  "When using the nconf with multiple providers": {
+    "and saving *asynchronously*": {
+      topic: function () {
+        nconf.set('weebls', 'crap');
+        nconf.save(this.callback);
+      },
+
+      "correct return value": function (err, data) {
+        assert.isNull(err);
+        Object.keys(data).forEach(function (key) {
+          assert.deepEqual(data[key], nconf.get(key));
+        });
+      },
+
+      "the file": {
+        topic: function () {
+          fs.readFile(completeTest, 'utf8', this.callback);
+        },
+
+        "saved correctly": function (err, data) {
+          assert.isNull(err);
+          data = JSON.parse(data);
+          Object.keys(data).forEach(function (key) {
+            assert.deepEqual(nconf.get(key), data[key]);
+          });
+          assert.equal(nconf.get('weebls'), 'crap');
+        }
+      }
+    },
+
+    teardown: function () {
+      nconf.remove('file');
+      nconf.remove('memory');
+      nconf.remove('argv');
+      nconf.remove('env');
+    }
+  }
+}).export(module);
+
+// vim: ts=2 shiftwidth=2 softtabstop=2

test/fixtures/complete.json

@@ -0,0 +1,19 @@
+{
+  "I've seen things": {
+    "like": [
+      "carrots",
+      "handbags",
+      "cheese",
+      "toilets",
+      "russians",
+      "planets",
+      "hampsters",
+      "weddings",
+      "poets",
+      "stalin",
+      "kuala lumpur"
+    ]
+  },
+  "host": "weebls-stuff.com",
+  "port": 78304
+}

test/helpers.js

@@ -7,6 +7,9 @@
 
 var assert = require('assert'),
     spawn = require('child_process').spawn,
+    util = require('util'),
+    fs = require('fs'),
+    path = require('path'),
     nconf = require('../lib/nconf');
 
 exports.assertMerged = function (err, merged) {
@@ -52,3 +55,16 @@ exports.assertSystemConf = function (options) {
   }
 }
 
+// copy a file
+exports.cp = function (from, to, callback) {
+  fs.readFile(from, function (err, data) {
+    if (err) return callback(err);
+    fs.writeFile(to, data, callback);
+  });
+};
+
+exports.fixture = function (file) {
+  return require('path').join(__dirname, 'fixtures', file);
+};
+
+// vim: ts=2 shiftwidth=2 softtabstop=2