Bkmartinjr/state mgr tests (#298)

Jest tests for part of util/stateManager

* reorganize test directories

* lint

* add Jest config to eslint

* add Jest config to eslint

* lint

* fix babel configuration for tests

* start at kvCache tests

* reorganize test directories

* lint

* add Jest config to eslint

* add Jest config to eslint

* lint

* fix babel configuration for tests

* start at kvCache tests

* fix cache flush bug manifest by new test cases

* new kvCache tests

* skeletal universe test

* fix race in test case

* more universe test cases

client/configuration/babel/babel.test.js

@@ -5,5 +5,9 @@ module.exports = {
     "stage-0",
     "react"
   ],
-  plugins: ["istanbul"]
+  plugins: [
+    "babel-plugin-transform-react-constant-elements",
+    "babel-plugin-transform-decorators-legacy",
+    "babel-plugin-transform-runtime"
+  ]
 };

client/configuration/eslint/eslint.js

@@ -34,5 +34,23 @@ module.exports = {
     "react/prop-types": [0],
     "space-before-function-paren": "off",
     "function-paren-newline": "off"
-  }
+  },
+  overrides: [
+    {
+      files: ["**/*.test.js"],
+      env: {
+        jest: true // now **/*.test.js files' env has both es6 *and* jest
+      },
+      // Can't extend in overrides: https://github.com/eslint/eslint/issues/8813
+      // "extends": ["plugin:jest/recommended"]
+      plugins: ["jest"],
+      rules: {
+        "jest/no-disabled-tests": "warn",
+        "jest/no-focused-tests": "error",
+        "jest/no-identical-title": "error",
+        "jest/prefer-to-have-length": "warn",
+        "jest/valid-expect": "error"
+      }
+    }
+  ]
 };