Add reset functionality

README.md

@@ -105,6 +105,10 @@ In your application, you can filter credentials generated by the module based on
 var filtered_credentials = IBMCloudEnv.getCredentialsForService('tag', 'label', credentials)); // returns a Json with credentials for specified service tag and label
 ```
 
+### Reset
+
+`IBMCloudEnv.reset()` can be used to **reset** already initialized state, so that `IBMCloudEnv.init()` can be used afterwards.
+
 ## Publishing Changes
 
 In order to publish changes, you will need to fork the repository or ask to join the `ibm-developer` org and branch off the `master` branch.

lib/lib.js

@@ -23,8 +23,8 @@ const PREFIX_PATTERN_CF = "cloudfoundry";
 const PREFIX_PATTERN_ENV = "env";
 const PREFIX_PATTERN_USER = "user-provided";
 
-const loadedFiles = []; // keep track so we don't re-read the filesystem unnecessarily
-const loadedMappings = {};
+let loadedFiles = []; // keep track so we don't re-read the filesystem unnecessarily
+let loadedMappings = {};
 
 function IBMCloudEnv() {
 
@@ -293,12 +293,18 @@ function IBMCloudEnv() {
 		}
 	}
 
+	function reset() {
+		loadedFiles = [];
+		loadedMappings = {};
+	}
+
 	return {
 		init: init,
 		getString: getString,
 		getDictionary: getDictionary,
 		setLogLevel: setLogLevel,
 		getCredentialsForService,
+		reset
 	};
 }
 

test/test.js

@@ -211,6 +211,20 @@ describe('App', function () {
 			expect(IBMCloudEnv.getDictionary("env_var3").value).to.equal("env-var-json-username");
 		});
 	})
+
+	describe('Reset', () => {
+		before(() => {
+			require("./fake-env-vars");
+			IBMCloudEnv.setLogLevel(Log4js.levels.TRACE);
+			IBMCloudEnv.init(path.join("/server", "config", "v1", "mappings.json"));
+		});
+
+		it('should reset loaded files and loaded mappings', () => {
+			expect(IBMCloudEnv.getString("file_var1")).to.equal("plain-text-string");
+			IBMCloudEnv.reset();
+			expect(IBMCloudEnv.getString("file_var1")).to.be.undefined;
+		});
+	});
 });
 
 describe('Test credentials for Watson', function() {