1 files changed, 136 insertions, 0 deletions
diff --git a/pkg/syserror/syserror_test.go b/pkg/syserror/syserror_test.go
new file mode 100644
index 000000000..fb7d8d5ee
--- /dev/null
+++ b/pkg/syserror/syserror_test.go
@@ -0,0 +1,136 @@
+// Copyright 2018 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package syserror_test
+
+import (
+	"errors"
+	"syscall"
+	"testing"
+
+	"gvisor.googlesource.com/gvisor/pkg/syserror"
+)
+
+var globalError error
+
+func returnErrnoAsError() error {
+	return syscall.EINVAL
+}
+
+func returnError() error {
+	return syserror.EINVAL
+}
+
+func BenchmarkReturnErrnoAsError(b *testing.B) {
+	for i := b.N; i > 0; i-- {
+		returnErrnoAsError()
+	}
+}
+
+func BenchmarkReturnError(b *testing.B) {
+	for i := b.N; i > 0; i-- {
+		returnError()
+	}
+}
+
+func BenchmarkCompareErrno(b *testing.B) {
+	j := 0
+	for i := b.N; i > 0; i-- {
+		if globalError == syscall.EINVAL {
+			j++
+		}
+	}
+}
+
+func BenchmarkCompareError(b *testing.B) {
+	j := 0
+	for i := b.N; i > 0; i-- {
+		if globalError == syserror.EINVAL {
+			j++
+		}
+	}
+}
+
+func BenchmarkSwitchErrno(b *testing.B) {
+	j := 0
+	for i := b.N; i > 0; i-- {
+		switch globalError {
+		case syscall.EINVAL:
+			j += 1
+		case syscall.EINTR:
+			j += 2
+		case syscall.EAGAIN:
+			j += 3
+		}
+	}
+}
+
+func BenchmarkSwitchError(b *testing.B) {
+	j := 0
+	for i := b.N; i > 0; i-- {
+		switch globalError {
+		case syserror.EINVAL:
+			j += 1
+		case syserror.EINTR:
+			j += 2
+		case syserror.EAGAIN:
+			j += 3
+		}
+	}
+}
+
+type translationTestTable struct {
+	fn                  string
+	errIn               error
+	syscallErrorIn      syscall.Errno
+	expectedBool        bool
+	expectedTranslation syscall.Errno
+}
+
+func TestErrorTranslation(t *testing.T) {
+	myError := errors.New("My test error")
+	myError2 := errors.New("Another test error")
+	testTable := []translationTestTable{
+		{"TranslateError", myError, 0, false, 0},
+		{"TranslateError", myError2, 0, false, 0},
+		{"AddErrorTranslation", myError, syscall.EAGAIN, true, 0},
+		{"AddErrorTranslation", myError, syscall.EAGAIN, false, 0},
+		{"AddErrorTranslation", myError, syscall.EPERM, false, 0},
+		{"TranslateError", myError, 0, true, syscall.EAGAIN},
+		{"TranslateError", myError2, 0, false, 0},
+		{"AddErrorTranslation", myError2, syscall.EPERM, true, 0},
+		{"AddErrorTranslation", myError2, syscall.EPERM, false, 0},
+		{"AddErrorTranslation", myError2, syscall.EAGAIN, false, 0},
+		{"TranslateError", myError, 0, true, syscall.EAGAIN},
+		{"TranslateError", myError2, 0, true, syscall.EPERM},
+	}
+	for _, tt := range testTable {
+		switch tt.fn {
+		case "TranslateError":
+			err, ok := syserror.TranslateError(tt.errIn)
+			if ok != tt.expectedBool {
+				t.Fatalf("%v(%v) => %v expected %v", tt.fn, tt.errIn, ok, tt.expectedBool)
+			} else if err != tt.expectedTranslation {
+				t.Fatalf("%v(%v) (error) => %v expected %v", tt.fn, tt.errIn, err, tt.expectedTranslation)
+			}
+		case "AddErrorTranslation":
+			ok := syserror.AddErrorTranslation(tt.errIn, tt.syscallErrorIn)
+			if ok != tt.expectedBool {
+				t.Fatalf("%v(%v) => %v expected %v", tt.fn, tt.errIn, ok, tt.expectedBool)
+			}
+		default:
+			t.Fatalf("Unknown function %v", tt.fn)
+		}
+	}
+}