Refactored all device list components to its own module.

res/app/device-list/util/patch-array/patch-array-test.js

@@ -0,0 +1,123 @@
+var assert = require('assert')
+
+var patchArray = require('./patch-array')
+
+var tests = [
+  {
+    a: ['a', 'b', 'c', 'd', 'e']
+  , b: ['a', 'e', 'c', 'd', 'b']
+  , ops: [
+      ['swap', 4, 1]
+    ]
+  }
+, {
+    a: ['a', 'b', 'c', 'd', 'e']
+  , b: ['e', 'd', 'c', 'b', 'a']
+  , ops: [
+      ['swap', 4, 0]
+    , ['swap', 3, 1]
+    ]
+  }
+, {
+    a: ['a', 'b', 'c', 'd', 'e', 'f']
+  , b: ['f', 'e', 'd', 'c', 'b', 'a']
+  , ops: [
+      ['swap', 5, 0]
+    , ['swap', 4, 1]
+    , ['swap', 3, 2]
+    ]
+  }
+, {
+    a: ['a', 'b', 'c', 'd', 'e', 'f']
+  , b: ['f', 'e']
+  , ops: [
+      ['remove', 0]
+    , ['remove', 0]
+    , ['remove', 0]
+    , ['remove', 0]
+    , ['swap', 1, 0]
+    ]
+  }
+, {
+    a: ['a', 'b', 'c', 'd', 'e', 'f']
+  , b: ['f', 'a']
+  , ops: [
+      ['remove', 1]
+    , ['remove', 1]
+    , ['remove', 1]
+    , ['remove', 1]
+    , ['swap', 1, 0]
+    ]
+  }
+, {
+    a: []
+  , b: ['a', 'b', 'c', 'd', 'e', 'f']
+  , ops: [
+      ['insert', 0, 'a']
+    , ['insert', 1, 'b']
+    , ['insert', 2, 'c']
+    , ['insert', 3, 'd']
+    , ['insert', 4, 'e']
+    , ['insert', 5, 'f']
+    ]
+  }
+, {
+    a: ['a', 'd']
+  , b: ['a', 'b', 'c', 'd', 'e', 'f']
+  , ops: [
+      ['insert', 1, 'b']
+    , ['insert', 2, 'c']
+    , ['insert', 4, 'e']
+    , ['insert', 5, 'f']
+    ]
+  }
+, {
+    a: ['b', 'd', 'a']
+  , b: ['a', 'b', 'c', 'd', 'e', 'f']
+  , ops: [
+      ['swap', 2, 0]
+    , ['swap', 2, 1]
+    , ['insert', 2, 'c']
+    , ['insert', 4, 'e']
+    , ['insert', 5, 'f']
+    ]
+  }
+]
+
+function verify(a, b, ops) {
+  var c = [].concat(a)
+  ops.forEach(function(op) {
+    switch (op[0]) {
+    case 'swap':
+      var temp = c[op[1]]
+      c[op[1]] = c[op[2]]
+      c[op[2]] = temp
+      break
+    case 'move':
+      c.splice(op[2] + 1, 0, c[op[1]])
+      c.splice(op[1], 1)
+      break
+    case 'insert':
+      c.splice(op[1], 0, op[2])
+      break
+    case 'remove':
+      c.splice(op[1], 1)
+      break
+    default:
+      throw new Error('Unknown op ' + op[0])
+    }
+  })
+  assert.deepEqual(c, b)
+}
+
+tests.forEach(function(test) {
+  console.log('Running test:')
+  console.log('  <- ', test.a)
+  console.log('  -> ', test.b)
+  console.log('Verifying test expectations')
+  verify(test.a, test.b, test.ops)
+  console.log('Verifying patchArray')
+  var patch = patchArray(test.a, test.b)
+  console.log(' patch', patch)
+  verify(test.a, test.b, patch)
+})