Move p9.pool to a separate package

PiperOrigin-RevId: 293617493

1 files changed, 64 insertions, 0 deletions

diff --git a/pkg/pool/pool_test.go b/pkg/pool/pool_test.go
new file mode 100644
index 000000000..d928439c1
--- /dev/null
+++ b/pkg/pool/pool_test.go
@@ -0,0 +1,64 @@
+// Copyright 2018 The gVisor Authors.
+//
+// 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 pool
+
+import (
+	"testing"
+)
+
+func TestPoolUnique(t *testing.T) {
+	p := Pool{Start: 1, Limit: 3}
+	got := make(map[uint64]bool)
+
+	for {
+		n, ok := p.Get()
+		if !ok {
+			break
+		}
+
+		// Check unique.
+		if _, ok := got[n]; ok {
+			t.Errorf("pool spit out %v multiple times", n)
+		}
+
+		// Record.
+		got[n] = true
+	}
+}
+
+func TestExausted(t *testing.T) {
+	p := Pool{Start: 1, Limit: 500}
+	for i := 0; i < 499; i++ {
+		_, ok := p.Get()
+		if !ok {
+			t.Fatalf("pool exhausted before 499 items")
+		}
+	}
+
+	_, ok := p.Get()
+	if ok {
+		t.Errorf("pool not exhausted when it should be")
+	}
+}
+
+func TestPoolRecycle(t *testing.T) {
+	p := Pool{Start: 1, Limit: 500}
+	n1, _ := p.Get()
+	p.Put(n1)
+	n2, _ := p.Get()
+	if n1 != n2 {
+		t.Errorf("pool not recycling items")
+	}
+}