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      1 // Copyright 2016 The Go Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 // +build s390x
      6 
      7 package sha256
      8 
      9 import (
     10 	"fmt"
     11 	"io"
     12 	"testing"
     13 )
     14 
     15 // Tests the fallback code path in case the optimized asm
     16 // implementation cannot be used.
     17 // See also TestBlockGeneric.
     18 func TestGenericPath(t *testing.T) {
     19 	if useAsm == false {
     20 		t.Skipf("assembly implementation unavailable")
     21 	}
     22 	useAsm = false
     23 	defer func() { useAsm = true }()
     24 	c := New()
     25 	in := ""
     26 	gold := "e93d84ec2b22383123be9f713697fb25" +
     27 		"338c86e2f7d8d1ddc2d89d332dd9d76c"
     28 	if _, err := io.WriteString(c, in); err != nil {
     29 		t.Fatalf("could not write to c: %v", err)
     30 	}
     31 	out := fmt.Sprintf("%x", c.Sum(nil))
     32 	if out != gold {
     33 		t.Fatalf("mismatch: got %s, wanted %s", out, gold)
     34 	}
     35 }
     36