Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/shimmer/test/init.tap.js

@@ -0,0 +1,48 @@
+'use strict'
+
+var tap = require('tap')
+var test = tap.test
+var sinon = require('sinon')
+var shimmer = require('../index.js')
+
+test('shimmer initialization', function (t) {
+  t.plan(4)
+
+  t.doesNotThrow(function () { shimmer() })
+
+  var mock = sinon.expectation
+    .create('logger')
+    .withArgs('no original function undefined to wrap')
+    .once()
+
+  t.doesNotThrow(function () {
+    shimmer({ logger: mock })
+  }, "initializer doesn't throw")
+
+  t.doesNotThrow(function () {
+    shimmer.wrap()
+  }, "invoking the wrap method with no params doesn't throw")
+
+  t.doesNotThrow(function () {
+    mock.verify()
+  }, 'logger method was called with the expected message')
+})
+
+test('shimmer initialized with non-function logger', function (t) {
+  t.plan(2)
+
+  var mock = sinon.expectation
+    .create('logger')
+    .withArgs("new logger isn't a function, not replacing")
+    .once()
+
+  shimmer({ logger: mock })
+
+  t.doesNotThrow(function () {
+    shimmer({ logger: { ham: 'chunx' } })
+  }, "even bad initialization doesn't throw")
+
+  t.doesNotThrow(function () {
+    mock.verify()
+  }, 'logger initialization failed in the expected way')
+})