added unit testing, and started implementing unit tests...phew

node_modules/@sinonjs/commons/.eslintrc.yaml

@@ -0,0 +1,53 @@
+extends:
+    - sinon
+    - 'plugin:prettier/recommended'
+
+env:
+  browser: true
+  node: true
+
+globals:
+  ArrayBuffer: false
+  Map: false
+  Promise: false
+  Set: false
+  Symbol: false
+
+plugins:
+  - ie11
+  - local-rules
+
+rules:
+  strict: [error, 'global']
+  # authors are expected to understand function hoisting
+  no-use-before-define: off
+
+  ie11/no-collection-args: error
+  ie11/no-for-in-const: error
+  ie11/no-loop-func: warn
+  ie11/no-weak-collections: error
+  local-rules/no-prototype-methods: error
+
+overrides:
+    files: '*.test.*'
+    plugins:
+        - mocha
+    env:
+        mocha: true
+    rules:
+      max-nested-callbacks:
+        - warn
+        - 6
+      mocha/handle-done-callback: error
+      mocha/no-exclusive-tests: error
+      mocha/no-global-tests: error
+      mocha/no-hooks-for-single-case: off
+      mocha/no-identical-title: error
+      mocha/no-mocha-arrows: error
+      mocha/no-nested-tests: error
+      mocha/no-return-and-callback: error
+      mocha/no-sibling-hooks: error
+      mocha/no-skipped-tests: error
+      mocha/no-top-level-hooks: error
+      local-rules/no-prototype-methods: off
+