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, 31 insertions, 0 deletions

diff --git a/ui/app/components/user-preferenced-currency-input/tests/user-preferenced-currency-input.container.test.js b/ui/app/components/user-preferenced-currency-input/tests/user-preferenced-currency-input.container.test.js
new file mode 100644
index 000000000..d860c38da
--- /dev/null
+++ b/ui/app/components/user-preferenced-currency-input/tests/user-preferenced-currency-input.container.test.js
@@ -0,0 +1,31 @@
+import assert from 'assert'
+import proxyquire from 'proxyquire'
+
+let mapStateToProps
+
+proxyquire('../user-preferenced-currency-input.container.js', {
+  'react-redux': {
+    connect: ms => {
+      mapStateToProps = ms
+      return () => ({})
+    },
+  },
+})
+
+describe('UserPreferencedCurrencyInput container', () => {
+  describe('mapStateToProps()', () => {
+    it('should return the correct props', () => {
+      const mockState = {
+        metamask: {
+          preferences: {
+            useETHAsPrimaryCurrency: true,
+          },
+        },
+      }
+
+      assert.deepEqual(mapStateToProps(mockState), {
+        useETHAsPrimaryCurrency: true,
+      })
+    })
+  })
+})