add tests for ShaCrypt

ShaCrypt_test.go

@@ -0,0 +1,83 @@
+package passwords
+
+import (
+	"testing"
+)
+
+const (
+	shaCryptFailErr    = "Password '%s$%s' encrypted with ShaCrypt should have no error, got '%s'."
+	shaCryptFailResult = "Password '%s' encrypted by ShaCrypt should have been '%s'; got '%s'."
+	shaCryptFailNoErr  = "Password '%s' encrypted with ShaCrypt should have produced an error, it did not."
+)
+
+type validShaCryptData struct {
+	Password  string
+	Salt      string
+	Encrypted string
+}
+
+type invalidShaCryptData struct {
+	Password string
+	Salt     string
+}
+
+var (
+	validShaCryptPasswords = []validShaCryptData{
+		validShaCryptData{
+			Password:  "test",
+			Salt:      "saltandd",
+			Encrypted: "$6$saltandd$4EB6r9HjiOq0Fu2/kHRJVdUhckKv1EVh4O36u.hLPBsljjn.c47frSzax7kPvrVaFO4Qom4zrYB.y9/wxlDbN.",
+		},
+		validShaCryptData{
+			Password:  "another password",
+			Salt:      "moresalt",
+			Encrypted: "$6$moresalt$P8Fkg5eFo5MTK8Wor17gSlHnaNR0aK/tVnIvww4MnQvqveR2qXbzZ6J81HCTYoEZT7bNpsj07STCed1HhtQoz/",
+		},
+	}
+
+	// Password/salt combinations that should produce a non-nil error
+	invalidShaCryptPasswords = []invalidShaCryptData{
+		invalidShaCryptData{
+			Password: "test",
+			Salt:     "short",
+		},
+		invalidShaCryptData{
+			Password: "test",
+			Salt:     "more than 16 characters",
+		},
+	}
+)
+
+func TestShaCrypt_valid(t *testing.T) {
+	for _, data := range validShaCryptPasswords {
+		got, err := ShaCrypt(data.Password, data.Salt)
+		if err != nil {
+			t.Errorf(shaCryptFailErr, data.Password, data.Salt, err)
+			// Don't bother with the next check if this failed
+			continue
+		}
+		if got != data.Encrypted {
+			t.Errorf(shaCryptFailResult, data.Password, data.Encrypted, got)
+			continue
+		}
+	}
+}
+
+func TestShaCrypt_invalid(t *testing.T) {
+	for _, data := range invalidShaCryptPasswords {
+		_, err := ShaCrypt(data.Password, data.Salt)
+		if err == nil {
+			t.Errorf(shaCryptFailNoErr, data.Password, data.Salt)
+		}
+	}
+}
+
+func BenchmarkShaCrypt(b *testing.B) {
+	data := validShaCryptPasswords[0]
+
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		ShaCrypt(data.Password, data.Salt)
+	}
+}