Change difficulty tests to run local Byzantium-compatible test select…

…ion (no Byzantium difficulty tests available yet)

tests/difficulty.js

@@ -13,32 +13,43 @@ function normalize (data) {
 }
 
 tape('[Header]: difficulty tests', t => {
+  function runDifficultyTests(test) {
+    normalize(test)
+
+    var parentBlock = new Block()
+    parentBlock.header.timestamp = test.parentTimestamp
+    parentBlock.header.difficulty = test.parentDifficulty
+    parentBlock.header.uncleHash = test.parentUncleHash
+
+    var block = new Block()
+    block.header.timestamp = test.currentTimestamp
+    block.header.difficulty = test.currentDifficulty
+    block.header.number = test.currentBlockNumber
+
+    var dif = block.header.canonicalDifficulty(parentBlock)
+    t.equal(dif.toString(), test.currentDifficulty.toString(), 'test canonicalDifficulty')
+    t.assert(block.header.validateDifficulty(parentBlock), 'test validateDifficulty')
+  }
+
+  const testData = require('./testdata-difficulty.json')
+  for (let testName in testData) {
+    runDifficultyTests(testData[testName])
+  }
+  t.end()
+
+  // Temporarily run local test selection
+  // also: implicit testing through ethereumjs-vm tests
+  // (no Byzantium difficulty tests available yet)
+  /*
   let args = {}
   args.file = /^difficultyHomestead/
   testing.getTestsFromArgs('BasicTests', (fileName, testName, test) => {
     return new Promise((resolve, reject) => {
-      normalize(test)
-
-      var parentBlock = new Block()
-      parentBlock.header.timestamp = test.parentTimestamp
-      parentBlock.header.difficulty = test.parentDifficulty
-
-      var block = new Block()
-      block.header.isHomestead = function () {
-        return true
-      }
-
-      block.header.timestamp = test.currentTimestamp
-      block.header.difficulty = test.currentDifficulty
-      block.header.number = test.currentBlockNumber
-
-      var dif = block.header.canonicalDifficulty(parentBlock)
-      t.equal(dif.toString(), test.currentDifficulty.toString(), 'test canonicalDifficulty')
-      t.assert(block.header.validateDifficulty(parentBlock), 'test validateDifficulty')
-
+      runDifficultyTests(test)
       resolve()
     }).catch(err => console.log(err))
   }, args).then(() => {
     t.end()
   })
+  */
 })

tests/testdata-difficulty.json

@@ -0,0 +1,50 @@
+{
+  "LocalDifficultyTest1_Byzantium" : {
+ 		"parentTimestamp" : "0x18d89135f8ebcb78",
+ 		"parentDifficulty" : "0x1ef5f85ed5a0067a",
+ 		"currentTimestamp" : "0x18d89135f8ebcb78",
+ 		"currentBlockNumber" : "0x61a9",
+ 		"currentDifficulty" : "0x1ef9d71de17aba7a",
+    "parentUncleHash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347"
+ 	},
+  "bcTotalDifficultyTest_uncleBlockAtBlock3AfterBlock3_Byzantium_GB_B1" : {
+    "parentTimestamp" : "0x54c98c81",
+ 		"parentDifficulty" : "0x020000",
+ 		"currentTimestamp" : "0x59976a0f",
+ 		"currentBlockNumber" : "0x01",
+ 		"currentDifficulty" : "0x020000",
+    "parentUncleHash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347"
+  },
+  "bcTotalDifficultyTest_uncleBlockAtBlock3AfterBlock3_Byzantium_B1_B2" : {
+    "parentTimestamp" : "0x59976a0f",
+ 		"parentDifficulty" : "0x020000",
+ 		"currentTimestamp" : "0x59976a11",
+ 		"currentBlockNumber" : "0x02",
+ 		"currentDifficulty" : "0x020040",
+    "parentUncleHash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347"
+  },
+  "bcTotalDifficultyTest_uncleBlockAtBlock3AfterBlock3_Byzantium_B2_B3_1" : {
+    "parentTimestamp" : "0x59976a11",
+ 		"parentDifficulty" : "0x020040",
+ 		"currentTimestamp" : "0x59976a13",
+ 		"currentBlockNumber" : "0x03",
+ 		"currentDifficulty" : "0x020080",
+    "parentUncleHash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347"
+  },
+  "bcTotalDifficultyTest_uncleBlockAtBlock3AfterBlock3_Byzantium_B2_B3_2" : {
+    "parentTimestamp" : "0x59976a11",
+ 		"parentDifficulty" : "0x020040",
+ 		"currentTimestamp" : "0x59976a19",
+ 		"currentBlockNumber" : "0x03",
+ 		"currentDifficulty" : "0x020080",
+    "parentUncleHash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347"
+  },
+  "bcTotalDifficultyTest_uncleBlockAtBlock3AfterBlock3_Byzantium_B3_2_B4" : {
+    "parentTimestamp" : "0x59976a19",
+ 		"parentDifficulty" : "0x020080",
+ 		"currentTimestamp" : "0x59976a1e",
+ 		"currentBlockNumber" : "0x04",
+ 		"currentDifficulty" : "0x020100",
+    "parentUncleHash": "0xca3e970cbb36b672f8707491c3aaf1dd0971c35f4bd23b26f668fa90eecb12b8"
+  }
+}