Merge branch 'develop' of https://github.com/MetaMask/metamask-extension into i#3896

1 files changed, 22 insertions, 0 deletions

diff --git a/ui/app/conversion-util.test.js b/ui/app/conversion-util.test.js
new file mode 100644
index 000000000..368ce3bba
--- /dev/null
+++ b/ui/app/conversion-util.test.js
@@ -0,0 +1,22 @@
+import assert from 'assert'
+import {addCurrencies} from './conversion-util'
+
+
+describe('conversion utils', () => {
+  describe('addCurrencies()', () => {
+    it('add whole numbers', () => {
+      const result = addCurrencies(3, 9)
+      assert.equal(result.toNumber(), 12)
+    })
+
+    it('add decimals', () => {
+      const result = addCurrencies(1.3, 1.9)
+      assert.equal(result.toNumber(), 3.2)
+    })
+
+    it('add repeating decimals', () => {
+      const result = addCurrencies(1 / 3, 1 / 9)
+      assert.equal(result.toNumber(), 0.4444444444444444)
+    })
+  })
+})