Move test bootstrap to main_test.go

ethutil/main_test.go

+package ethutil
+
+import (
+	checker "gopkg.in/check.v1"
+	"testing"
+)
+
+func Test(t *testing.T) { checker.TestingT(t) }

ethutil/size_test.go

 package ethutil
 
 import (
-	"testing"
+	checker "gopkg.in/check.v1"
 )
 
-func TestStorageSizeString(t *testing.T) {
+type SizeSuite struct{}
+
+var _ = checker.Suite(&SizeSuite{})
+
+func (s *SizeSuite) TestStorageSizeString(c *checker.C) {
 	data1 := 2381273
 	data2 := 2192
 	data3 := 12

ethutil/value_test.go

@@ -3,11 +3,8 @@ package ethutil
 import (
 	checker "gopkg.in/check.v1"
 	"math/big"
-	"testing"
 )
 
-func Test(t *testing.T) { checker.TestingT(t) }
-
 type ValueSuite struct{}
 
 var _ = checker.Suite(&ValueSuite{})