1 files changed, 26 insertions, 0 deletions
diff --git a/test/unit/tx-utils-test.js b/test/unit/tx-utils-test.js
new file mode 100644
index 000000000..65233e1d9
--- /dev/null
+++ b/test/unit/tx-utils-test.js
@@ -0,0 +1,26 @@
+const assert = require('assert')
+const ethUtil = require('ethereumjs-util')
+const BN = ethUtil.BN
+
+const TxUtils = require('../../app/scripts/lib/tx-utils')
+
+
+describe('txUtils', function() {
+  let txUtils
+
+  before(function() {
+    txUtils = new TxUtils()
+  })
+
+  describe('addGasBuffer', function() {
+    it('multiplies by 1.5', function() {
+      const input = '0x123fad'
+      const output = txUtils.addGasBuffer(input, '0x3d4c52') //0x3d4c52 is 4mil for dummy gas limit
+
+      const inputBn = new BN(ethUtil.stripHexPrefix(input), 'hex')
+      const outputBn = new BN(ethUtil.stripHexPrefix(output), 'hex')
+      const expectedBn = inputBn.muln(1.5)
+      assert(outputBn.eq(expectedBn), 'returns 1.5 the input value')
+    })
+  })
+})