add basic test for blocks package #59 (actually add file)

blocks/blocks_test.go

+package blocks
+
+import "testing"
+
+func TestBlocksBasic(t *testing.T) {
+
+	// Test empty data
+	empty := []byte{}
+	_, err := NewBlock(empty)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Test nil case
+	_, err = NewBlock(nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Test some data
+	_, err = NewBlock([]byte("Hello world!"))
+	if err != nil {
+		t.Fatal(err)
+	}
+}