Unit test framework and some bug fixes (#29)

This PR adds:
1. A mock framework for all VS Code types to allow easy and fast
testing.
2. Adds a sample test
3. Fixes few bugs found while setting up the framework

Author: karthiknadig

.vscode/launch.json

@@ -3,33 +3,45 @@
 // Hover to view descriptions of existing attributes.
 // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
 {
-	"version": "0.2.0",
-	"configurations": [
-		{
-			"name": "Run Extension",
-			"type": "extensionHost",
-			"request": "launch",
-			"args": [
-				"--extensionDevelopmentPath=${workspaceFolder}"
-			],
-			"outFiles": [
-				"${workspaceFolder}/dist/**/*.js"
-			],
-			"preLaunchTask": "${defaultBuildTask}"
-		},
-		{
-			"name": "Extension Tests",
-			"type": "extensionHost",
-			"request": "launch",
-			"args": [
-				"--extensionDevelopmentPath=${workspaceFolder}",
-				"--extensionTestsPath=${workspaceFolder}/out/test/suite/index"
-			],
-			"outFiles": [
-				"${workspaceFolder}/out/**/*.js",
-				"${workspaceFolder}/dist/**/*.js"
-			],
-			"preLaunchTask": "tasks: watch-tests"
-		}
-	]
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Run Extension",
+            "type": "extensionHost",
+            "request": "launch",
+            "args": ["--extensionDevelopmentPath=${workspaceFolder}"],
+            "outFiles": ["${workspaceFolder}/dist/**/*.js"],
+            "preLaunchTask": "${defaultBuildTask}"
+        },
+        {
+            "args": [
+                "-u=tdd",
+                "--timeout=999999",
+                "--colors",
+                "--recursive",
+                //"--grep", "<suite name>",
+                "--require=out/test/unittests.js",
+                "./out/test/**/*.unit.test.js"
+            ],
+            "internalConsoleOptions": "openOnSessionStart",
+            "name": "Unit Tests",
+            "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
+            "request": "launch",
+            "skipFiles": ["<node_internals>/**"],
+            "outFiles": ["${workspaceFolder}/out/**/*.js", "!${workspaceFolder}/**/node_modules**/*"],
+            "type": "node",
+            "preLaunchTask": "tasks: watch-tests"
+        },
+        {
+            "name": "Extension Tests",
+            "type": "extensionHost",
+            "request": "launch",
+            "args": [
+                "--extensionDevelopmentPath=${workspaceFolder}",
+                "--extensionTestsPath=${workspaceFolder}/out/test/"
+            ],
+            "outFiles": ["${workspaceFolder}/out/**/*.js", "${workspaceFolder}/dist/**/*.js"],
+            "preLaunchTask": "tasks: watch-tests"
+        }
+    ]
 }

.vscode/tasks.json

@@ -1,40 +1,37 @@
 // See https://go.microsoft.com/fwlink/?LinkId=733558
 // for the documentation about the tasks.json format
 {
-	"version": "2.0.0",
-	"tasks": [
-		{
-			"type": "npm",
-			"script": "watch",
-			"problemMatcher": "$ts-webpack-watch",
-			"isBackground": true,
-			"presentation": {
-				"reveal": "never",
-				"group": "watchers"
-			},
-			"group": {
-				"kind": "build",
-				"isDefault": true
-			}
-		},
-		{
-			"type": "npm",
-			"script": "watch-tests",
-			"problemMatcher": "$tsc-watch",
-			"isBackground": true,
-			"presentation": {
-				"reveal": "never",
-				"group": "watchers"
-			},
-			"group": "build"
-		},
-		{
-			"label": "tasks: watch-tests",
-			"dependsOn": [
-				"npm: watch",
-				"npm: watch-tests"
-			],
-			"problemMatcher": []
-		}
-	]
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "type": "npm",
+            "script": "watch",
+            "problemMatcher": "$ts-webpack-watch",
+            "isBackground": true,
+            "presentation": {
+                "reveal": "never",
+                "group": "watchers"
+            },
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        },
+        {
+            "type": "npm",
+            "script": "watch-tests",
+            "problemMatcher": "$tsc-watch",
+            "isBackground": true,
+            "presentation": {
+                "reveal": "never",
+                "group": "watchers"
+            },
+            "group": "build"
+        },
+        {
+            "label": "tasks: watch-tests",
+            "dependsOn": ["npm: watch", "npm: watch-tests"],
+            "problemMatcher": []
+        }
+    ]
 }