1 files changed, 37 insertions, 0 deletions
diff --git a/pkg/sentry/limits/limits_test.go b/pkg/sentry/limits/limits_test.go
new file mode 100644
index 000000000..dd6f80750
--- /dev/null
+++ b/pkg/sentry/limits/limits_test.go
@@ -0,0 +1,37 @@
+// 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 limits
+
+import (
+	"syscall"
+	"testing"
+)
+
+func TestSet(t *testing.T) {
+	ls := NewLimitSet()
+	ls.Set(1, Limit{Cur: 50, Max: 50})
+	if _, err := ls.Set(1, Limit{Cur: 20, Max: 50}); err != nil {
+		t.Fatalf("Tried to lower Limit to valid new value: got %v, wanted nil", err)
+	}
+	if _, err := ls.Set(1, Limit{Cur: 20, Max: 60}); err != syscall.EPERM {
+		t.Fatalf("Tried to raise limit.Max to invalid higher value: got %v, wanted syscall.EPERM", err)
+	}
+	if _, err := ls.Set(1, Limit{Cur: 60, Max: 50}); err != syscall.EINVAL {
+		t.Fatalf("Tried to raise limit.Cur to invalid higher value: got %v, wanted syscall.EINVAL", err)
+	}
+	if _, err := ls.Set(1, Limit{Cur: 11, Max: 10}); err != syscall.EINVAL {
+		t.Fatalf("Tried to set new limit with Cur > Max: got %v, wanted syscall.EINVAL", err)
+	}
+}