Move CurrencyToString to size

common/size_test.go

@@ -1,6 +1,8 @@
 package common
 
 import (
+	"math/big"
+
 	checker "gopkg.in/check.v1"
 )
 
@@ -21,3 +23,35 @@ func (s *SizeSuite) TestStorageSizeString(c *checker.C) {
 	c.Assert(StorageSize(data2).String(), checker.Equals, exp2)
 	c.Assert(StorageSize(data3).String(), checker.Equals, exp3)
 }
+
+func (s *CommonSuite) TestCommon(c *checker.C) {
+	douglas := CurrencyToString(BigPow(10, 43))
+	einstein := CurrencyToString(BigPow(10, 22))
+	ether := CurrencyToString(BigPow(10, 19))
+	finney := CurrencyToString(BigPow(10, 16))
+	szabo := CurrencyToString(BigPow(10, 13))
+	shannon := CurrencyToString(BigPow(10, 10))
+	babbage := CurrencyToString(BigPow(10, 7))
+	ada := CurrencyToString(BigPow(10, 4))
+	wei := CurrencyToString(big.NewInt(10))
+
+	c.Assert(douglas, checker.Equals, "10 Douglas")
+	c.Assert(einstein, checker.Equals, "10 Einstein")
+	c.Assert(ether, checker.Equals, "10 Ether")
+	c.Assert(finney, checker.Equals, "10 Finney")
+	c.Assert(szabo, checker.Equals, "10 Szabo")
+	c.Assert(shannon, checker.Equals, "10 Shannon")
+	c.Assert(babbage, checker.Equals, "10 Babbage")
+	c.Assert(ada, checker.Equals, "10 Ada")
+	c.Assert(wei, checker.Equals, "10 Wei")
+}
+
+func (s *CommonSuite) TestLarge(c *checker.C) {
+	douglaslarge := CurrencyToString(BigPow(100000000, 43))
+	adalarge := CurrencyToString(BigPow(100000000, 4))
+	weilarge := CurrencyToString(big.NewInt(100000000))
+
+	c.Assert(douglaslarge, checker.Equals, "10000E298 Douglas")
+	c.Assert(adalarge, checker.Equals, "10000E7 Einstein")
+	c.Assert(weilarge, checker.Equals, "100 Babbage")
+}