feat(formatter): add logentries formatter

Author: sonicoder86

package-lock.json

@@ -1,9 +1,7 @@
 'use strict';
 
-const jsonFormatter = require('./json');
-const debugFormatter = require('./debug');
-
 module.exports = {
-  json: jsonFormatter,
-  debug: debugFormatter
+  json: require('./json'),
+  debug: require('./debug'),
+  logentries: require('./logentries')
 };

src/formatter/index.js

@@ -0,0 +1,9 @@
+'use strict';
+
+const jsonFormatter = require('./json');
+
+describe('json formatter', function() {
+  it('should stringify object to json', function() {
+    expect(jsonFormatter({ name: 'debugger' })).to.eql('{"name":"debugger"}');
+  });
+});

src/formatter/json.spec.js

@@ -0,0 +1,24 @@
+'use strict';
+
+const isNumeric = (value) => !isNaN(parseFloat(value)) && isFinite(value);
+
+const isString = (value) => typeof value === 'string' || value instanceof String;
+
+const convertToTag = (value, key) => {
+  if (isString(value)) {
+    value = JSON.stringify(value);
+  } else if(isNumeric(value)) {
+    value = value.toString();
+  } else {
+    value = '"' + JSON.stringify(value) + '"';
+  }
+
+  return key + '=' + value;
+};
+
+module.exports = function(data) {
+  return Object
+    .keys(data)
+    .map(key => convertToTag(data[key], key))
+    .join(' ');
+};

src/formatter/logentries.js

@@ -0,0 +1,23 @@
+'use strict';
+
+const logentriesFormatter = require('./logentries');
+
+describe('logentries formatter', function() {
+  it('should stringify single field to key value pairs', function() {
+    expect(logentriesFormatter({ name: 'debugger' })).to.eql('name="debugger"');
+  });
+
+  it('should stringify multiple fields separated', function() {
+    expect(logentriesFormatter({ name: 'debugger', namespace: 'it' })).to.eql('name="debugger" namespace="it"');
+  });
+
+  it('should not print numbers as string', function() {
+    expect(logentriesFormatter({ name: 'debugger', duration: 10, percent: 1.5 }))
+      .to.eql('name="debugger" duration=10 percent=1.5');
+  });
+
+  it('should json stringify nested objects', function() {
+    expect(logentriesFormatter({ name: 'debugger', nested: { inner: 10 } }))
+      .to.eql('name="debugger" nested="{"inner":10}"');
+  });
+});