Add CurrencyDisplay and TokenCurrencyDisplay components

5 files changed, 133 insertions, 0 deletions

diff --git a/ui/app/components/currency-display/currency-display.component.js b/ui/app/components/currency-display/currency-display.component.js
new file mode 100644
index 000000000..f1bb933d7
--- /dev/null
+++ b/ui/app/components/currency-display/currency-display.component.js
@@ -0,0 +1,24 @@
+import React, { PureComponent } from 'react'
+import PropTypes from 'prop-types'
+
+export default class CurrencyDisplay extends PureComponent {
+  static propTypes = {
+    className: PropTypes.string,
+    displayValue: PropTypes.string,
+    prefix: PropTypes.string,
+  }
+
+  render () {
+    const { className, displayValue, prefix } = this.props
+    const text = `${prefix || ''}${displayValue}`
+
+    return (
+      <div
+        className={className}
+        title={text}
+      >
+        { text }
+      </div>
+    )
+  }
+}
diff --git a/ui/app/components/currency-display/currency-display.container.js b/ui/app/components/currency-display/currency-display.container.js
new file mode 100644
index 000000000..b36bba52a
--- /dev/null
+++ b/ui/app/components/currency-display/currency-display.container.js
@@ -0,0 +1,20 @@
+import { connect } from 'react-redux'
+import CurrencyDisplay from './currency-display.component'
+import { getValueFromWeiHex, formatCurrency } from '../../helpers/confirm-transaction/util'
+import { ETH } from '../../constants/common'
+
+const mapStateToProps = (state, ownProps) => {
+  const { value, numberOfDecimals = 2, currency } = ownProps
+  const { metamask: { currentCurrency, conversionRate } } = state
+
+  const toCurrency = currency === ETH ? ETH : currentCurrency
+  const convertedValue = getValueFromWeiHex({ value, toCurrency, conversionRate, numberOfDecimals })
+  const formattedValue = formatCurrency(convertedValue, toCurrency)
+  const displayValue = `${formattedValue} ${toCurrency.toUpperCase()}`
+
+  return {
+    displayValue,
+  }
+}
+
+export default connect(mapStateToProps)(CurrencyDisplay)
diff --git a/ui/app/components/currency-display/index.js b/ui/app/components/currency-display/index.js
new file mode 100644
index 000000000..38f08765f
--- /dev/null
+++ b/ui/app/components/currency-display/index.js
@@ -0,0 +1 @@
+export { default } from './currency-display.container'
diff --git a/ui/app/components/currency-display/tests/currency-display.component.test.js b/ui/app/components/currency-display/tests/currency-display.component.test.js
new file mode 100644
index 000000000..d9ef052f1
--- /dev/null
+++ b/ui/app/components/currency-display/tests/currency-display.component.test.js
@@ -0,0 +1,27 @@
+import React from 'react'
+import assert from 'assert'
+import { shallow } from 'enzyme'
+import CurrencyDisplay from '../currency-display.component'
+
+describe('CurrencyDisplay Component', () => {
+  it('should render text with a className', () => {
+    const wrapper = shallow(<CurrencyDisplay
+      displayValue="$123.45"
+      className="currency-display"
+    />)
+
+    assert.ok(wrapper.hasClass('currency-display'))
+    assert.equal(wrapper.text(), '$123.45')
+  })
+
+  it('should render text with a prefix', () => {
+    const wrapper = shallow(<CurrencyDisplay
+      displayValue="$123.45"
+      className="currency-display"
+      prefix="-"
+    />)
+
+    assert.ok(wrapper.hasClass('currency-display'))
+    assert.equal(wrapper.text(), '-$123.45')
+  })
+})
diff --git a/ui/app/components/currency-display/tests/currency-display.container.test.js b/ui/app/components/currency-display/tests/currency-display.container.test.js
new file mode 100644
index 000000000..474ce5378
--- /dev/null
+++ b/ui/app/components/currency-display/tests/currency-display.container.test.js
@@ -0,0 +1,61 @@
+import assert from 'assert'
+import proxyquire from 'proxyquire'
+
+let mapStateToProps
+
+proxyquire('../currency-display.container.js', {
+  'react-redux': {
+    connect: ms => {
+      mapStateToProps = ms
+      return () => ({})
+    },
+  },
+})
+
+describe('CurrencyDisplay container', () => {
+  describe('mapStateToProps()', () => {
+    it('should return the correct props', () => {
+      const mockState = {
+        metamask: {
+          conversionRate: 280.45,
+          currentCurrency: 'usd',
+        },
+      }
+
+      const tests = [
+        {
+          props: {
+            value: '0x2386f26fc10000',
+            numberOfDecimals: 2,
+            currency: 'usd',
+          },
+          result: {
+            displayValue: '$2.80 USD',
+          },
+        },
+        {
+          props: {
+            value: '0x2386f26fc10000',
+          },
+          result: {
+            displayValue: '$2.80 USD',
+          },
+        },
+        {
+          props: {
+            value: '0x1193461d01595930',
+            currency: 'ETH',
+            numberOfDecimals: 3,
+          },
+          result: {
+            displayValue: '1.266 ETH',
+          },
+        },
+      ]
+
+      tests.forEach(({ props, result }) => {
+        assert.deepEqual(mapStateToProps(mockState, props), result)
+      })
+    })
+  })
+})