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-rw-r--r--test/unit/tx-utils-test.js38
1 files changed, 38 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..6131ed73f
--- /dev/null
+++ b/test/unit/tx-utils-test.js
@@ -0,0 +1,38 @@
+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() {
+ describe('adds a flat value', function() {
+ it('over an empty value', function() {
+ const input = '0x0'
+ const output = txUtils.addGasBuffer(input)
+ assert.notEqual(output, input, 'changed the value')
+
+ const inputBn = new BN(input, 'hex')
+ const outputBn = new BN(output, 'hex')
+ assert(outputBn.gt(inputBn), 'returns a greater value')
+ })
+
+ it('over an value', function() {
+ const input = '0x123fad'
+ const output = txUtils.addGasBuffer(input)
+ assert.notEqual(output, input, 'changed the value')
+
+ const inputBn = new BN(input, 'hex')
+ const outputBn = new BN(output, 'hex')
+ assert(outputBn.gt(inputBn), 'returns a greater value')
+ })
+ })
+ })
+}) \ No newline at end of file