Adding exif node tests

test/utility/exif/94-exif_spec.js

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+/**
+ * Copyright 2014 IBM Corp.
+ *
+ * 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.
+ **/
+
+var should = require("should");
+var sinon = require('sinon');
+var fs = require("fs");
+
+var exifNode = require("../../../utility/exif/94-exif.js");
+
+var helper = require('../../../../node-red/test/nodes/helper.js');
+
+describe('exif node', function() {
+    
+    beforeEach(function(done) {
+        helper.startServer(done);
+    });
+
+    afterEach(function(done) {
+        helper.unload();
+        helper.stopServer(done);
+    });
+
+    it('extracts location data from Exif data of JPEG', function(done) {
+        
+        var exif = require('exif');
+        var ExifImage = exif.ExifImage;
+        
+        // the jpg file is a single black dot but it was originally a photo taken at IBM Hursley
+        var data = fs.readFileSync("./exif_test_image.jpg", null); // extracting genuine exif data to be fed back as the result of the stubbed ExifImage constructor
+        
+        var eD;
+        
+        new ExifImage({ image : data }, function (error, exifData) {
+            if(error) {
+                done(error);
+            } else {
+                eD = exifData;
+            }
+            
+            var flow = [{id:"exifNode1", type:"exif", wires:[["helperNode1"]]},
+                        {id:"helperNode1", type:"helper"}];
+           
+            helper.load(exifNode, flow, function() {
+                var exifNode1 = helper.getNode("exifNode1");
+                var helperNode1 = helper.getNode("helperNode1");
+                
+                helperNode1.on("input", function(msg) {
+                    msg.location.lat.should.equal(50.95624); // this data is stored in the jpg file
+                    msg.location.lon.should.equal(-1.36701);
+                    done();
+                });
+                
+                var stub = sinon.stub(ExifImage.prototype, 'loadImage', function(error, callback) {
+                    stub.restore();
+                    callback(null, eD);
+                });
+                
+                exifNode1.receive({payload:data});
+            });
+        });
+        
+    });
+});

test/utility/exif/Gruntfile.js

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+/**
+ * Copyright 2013, 2014 IBM Corp.
+ *
+ * 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.
+ **/
+
+module.exports = function(grunt) {
+    
+    // Project configuration.
+    grunt.initConfig({
+        simplemocha: {
+            options: {
+                globals: ['expect'],
+                timeout: 3000,
+                ignoreLeaks: false,
+                ui: 'bdd',
+                reporter: 'spec'
+            },
+            all: { src: ['./*_spec.js'] },
+        },
+        jshint: {
+            options: {
+                // http://www.jshint.com/docs/options/
+                "asi": true,      // allow missing semicolons
+                "curly": true,    // require braces
+                "eqnull": true,   // ignore ==null
+                "forin": true,    // require property filtering in "for in" loops
+                "immed": true,    // require immediate functions to be wrapped in ( )
+                "nonbsp": true,   // warn on unexpected whitespace breaking chars
+                //"strict": true, // commented out for now as it causes 100s of warnings, but want to get there eventually
+                "loopfunc": true, // allow functions to be defined in loops
+                "sub": true       // don't warn that foo['bar'] should be written as foo.bar
+            },
+            all: {
+                src: ['../../../utility/exif/*.js']
+            },
+        }
+    });
+
+    grunt.loadNpmTasks('grunt-simple-mocha');
+    grunt.loadNpmTasks('grunt-contrib-jshint');
+    grunt.loadNpmTasks('grunt-lint-inline');
+
+    grunt.registerTask('default',
+                       ['jshint:all', 'simplemocha:all']);
+
+};