adds missing tests

test/index.js

@@ -5,8 +5,68 @@ test('crypto-symbols', () => {
     const { EUR } = require('..')
     strictEqual(EUR, '€')
   })
+
+  test('supports us dollar', () => {
+    const { USD } = require('..')
+    strictEqual(USD, '$')
+  })
+
+  test('supports british pound sterling', () => {
+    const { GBP } = require('..')
+    strictEqual(GBP, '£')
+  })
+
+  test('supports indian rupee', () => {
+    const { INR } = require('..')
+    strictEqual(INR, '₹')
+  })
+
+  test('supports chinese yuan', () => {
+    const { CNY } = require('..')
+    strictEqual(CNY, '¥')
+  })
+  test('supports russian ruble', () => {
+    const { RUB } = require('..')
+    strictEqual(RUB, '₽')
+  })
+
   test('supports bitcoin', () => {
     const { BTC } = require('..')
     strictEqual(BTC, '₿')
   })
+
+  test('supports bitcoin cash', () => {
+    const { BCH } = require('..')
+    strictEqual(BCH, 'Ƀ')
+  })
+
+  test('supports litecoin', () => {
+    const { LTC } = require('..')
+    strictEqual(LTC, 'Ł')
+  })
+
+  test('supports ethereum', () => {
+    const { ETH } = require('..')
+    strictEqual(ETH, 'Ξ')
+  })
+
+  test('supports ethereum classic', () => {
+    const { ETH } = require('..')
+    strictEqual(ETH, 'Ξ')
+  })
+
+  test('supports 0x', () => {
+    const { ZRX } = require('..')
+    strictEqual(ZRX, '¤')
+  })
+
+  test('supports doge coin', () => {
+    const { DOGE } = require('..')
+    strictEqual(DOGE, 'Ð')
+  })
+
+  test('supports iota', () => {
+    const { IOTA } = require('..')
+    strictEqual(IOTA, 'ι')
+  })
 })