1 files changed, 27 insertions, 0 deletions
diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-utils.test.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-utils.test.js
new file mode 100644
index 000000000..1ee858f67
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-utils.test.js
@@ -0,0 +1,27 @@
+import assert from 'assert'
+import {
+  calcMaxAmount,
+} from '../amount-max-button.utils.js'
+
+describe('amount-max-button utils', () => {
+
+  describe('calcMaxAmount()', () => {
+    it('should calculate the correct amount when no selectedToken defined', () => {
+      assert.deepEqual(calcMaxAmount({
+        balance: 'ffffff',
+        gasTotal: 'ff',
+        selectedToken: false,
+      }), 'ffff00')
+    })
+
+    it('should calculate the correct amount when a selectedToken is defined', () => {
+      assert.deepEqual(calcMaxAmount({
+        selectedToken: {
+          decimals: 10,
+        },
+        tokenBalance: '64',
+      }), 'e8d4a51000')
+    })
+  })
+
+})