common: improve test (ethereum#20354)

common/bytes_test.go

@@ -19,41 +19,43 @@ package common
 import (
 	"bytes"
 	"testing"
-
-	checker "gopkg.in/check.v1"
 )
 
-type BytesSuite struct{}
-
-var _ = checker.Suite(&BytesSuite{})
+func TestCopyBytes(t *testing.T) {
+	input := []byte{1, 2, 3, 4}
 
-func (s *BytesSuite) TestCopyBytes(c *checker.C) {
-	data1 := []byte{1, 2, 3, 4}
-	exp1 := []byte{1, 2, 3, 4}
-	res1 := CopyBytes(data1)
-	c.Assert(res1, checker.DeepEquals, exp1)
+	v := CopyBytes(input)
+	if !bytes.Equal(v, []byte{1, 2, 3, 4}) {
+		t.Fatal("not equal after copy")
+	}
+	v[0] = 99
+	if bytes.Equal(v, input) {
+		t.Fatal("result is not a copy")
+	}
 }
 
-func (s *BytesSuite) TestLeftPadBytes(c *checker.C) {
-	val1 := []byte{1, 2, 3, 4}
-	exp1 := []byte{0, 0, 0, 0, 1, 2, 3, 4}
-
-	res1 := LeftPadBytes(val1, 8)
-	res2 := LeftPadBytes(val1, 2)
+func TestLeftPadBytes(t *testing.T) {
+	val := []byte{1, 2, 3, 4}
+	padded := []byte{0, 0, 0, 0, 1, 2, 3, 4}
 
-	c.Assert(res1, checker.DeepEquals, exp1)
-	c.Assert(res2, checker.DeepEquals, val1)
+	if r := LeftPadBytes(val, 8); !bytes.Equal(r, padded) {
+		t.Fatalf("LeftPadBytes(%v, 8) == %v", val, r)
+	}
+	if r := LeftPadBytes(val, 2); !bytes.Equal(r, val) {
+		t.Fatalf("LeftPadBytes(%v, 2) == %v", val, r)
+	}
 }
 
-func (s *BytesSuite) TestRightPadBytes(c *checker.C) {
+func TestRightPadBytes(t *testing.T) {
 	val := []byte{1, 2, 3, 4}
-	exp := []byte{1, 2, 3, 4, 0, 0, 0, 0}
-
-	resstd := RightPadBytes(val, 8)
-	resshrt := RightPadBytes(val, 2)
+	padded := []byte{1, 2, 3, 4, 0, 0, 0, 0}
 
-	c.Assert(resstd, checker.DeepEquals, exp)
-	c.Assert(resshrt, checker.DeepEquals, val)
+	if r := RightPadBytes(val, 8); !bytes.Equal(r, padded) {
+		t.Fatalf("RightPadBytes(%v, 8) == %v", val, r)
+	}
+	if r := RightPadBytes(val, 2); !bytes.Equal(r, val) {
+		t.Fatalf("RightPadBytes(%v, 2) == %v", val, r)
+	}
 }
 
 func TestFromHex(t *testing.T) {