moving hypercore tests to this repo

package.json

@@ -10,10 +10,11 @@
     "hypercore": "^9.2.1",
     "random-access-memory": "^3.1.1",
     "standard": "^14.3.4",
+    "stream-collector": "^1.0.1",
     "tape": "^5.0.1"
   },
   "scripts": {
-    "test": "standard && tape test.js"
+    "test": "standard && tape test/index.js"
   },
   "repository": {
     "type": "git",

test/helpers/create-tracking-ram.js

@@ -0,0 +1,27 @@
+const ram = require('random-access-memory')
+
+module.exports = function () {
+  const logByFilename = {}
+  const factory = function (filename) {
+    const memory = ram()
+    const log = []
+    logByFilename[filename] = log
+    return {
+      read: logAndForward('read'),
+      write: logAndForward('write'),
+      del: logAndForward('del')
+    }
+
+    function logAndForward (op) {
+      return function () {
+        var statement = {}
+        statement[op] = [].slice.apply(arguments)
+        statement[op].pop()
+        log.push(statement)
+        return memory[op].apply(memory, arguments)
+      }
+    }
+  }
+  factory.log = logByFilename
+  return factory
+}