Adds toggle for primary currency (#5421)

* Add UnitInput component

* Add CurrencyInput component

* Add UserPreferencedCurrencyInput component

* Add UserPreferencedCurrencyDisplay component

* Add updatePreferences action

* Add styles for CurrencyInput, CurrencyDisplay, and UnitInput

* Update SettingsTab page with Primary Currency toggle

* Refactor currency displays and inputs to use UserPreferenced displays and inputs

* Add TokenInput component

* Add UserPreferencedTokenInput component

* Use TokenInput in the send screen

* Fix unit tests

* Fix e2e and integration tests

* Remove send/CurrencyDisplay component

* Replace diamond unicode character with Eth logo. Fix typos

1 files changed, 32 insertions, 0 deletions

diff --git a/ui/app/components/user-preferenced-currency-input/tests/user-preferenced-currency-input.component.test.js b/ui/app/components/user-preferenced-currency-input/tests/user-preferenced-currency-input.component.test.js
new file mode 100644
index 000000000..0af80a03d
--- /dev/null
+++ b/ui/app/components/user-preferenced-currency-input/tests/user-preferenced-currency-input.component.test.js
@@ -0,0 +1,32 @@
+import React from 'react'
+import assert from 'assert'
+import { shallow } from 'enzyme'
+import UserPreferencedCurrencyInput from '../user-preferenced-currency-input.component'
+import CurrencyInput from '../../currency-input'
+
+describe('UserPreferencedCurrencyInput Component', () => {
+  describe('rendering', () => {
+    it('should render properly', () => {
+      const wrapper = shallow(
+        <UserPreferencedCurrencyInput />
+      )
+
+      assert.ok(wrapper)
+      assert.equal(wrapper.find(CurrencyInput).length, 1)
+    })
+
+    it('should render useFiat for CurrencyInput based on preferences.useETHAsPrimaryCurrency', () => {
+      const wrapper = shallow(
+        <UserPreferencedCurrencyInput
+          useETHAsPrimaryCurrency
+        />
+      )
+
+      assert.ok(wrapper)
+      assert.equal(wrapper.find(CurrencyInput).length, 1)
+      assert.equal(wrapper.find(CurrencyInput).props().useFiat, false)
+      wrapper.setProps({ useETHAsPrimaryCurrency: false })
+      assert.equal(wrapper.find(CurrencyInput).props().useFiat, true)
+    })
+  })
+})