Maintain index of high-cardinality edges in node authorizer graph

plugin/pkg/auth/authorizer/node/intset_test.go

@@ -0,0 +1,62 @@
+/*
+Copyright 2018 The Kubernetes 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 node
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIntSet(t *testing.T) {
+	i := newIntSet()
+
+	assert.False(t, i.has(1))
+	assert.False(t, i.has(2))
+	assert.False(t, i.has(3))
+	assert.False(t, i.has(4))
+
+	i.startNewGeneration()
+	i.mark(1)
+	i.mark(2)
+	i.sweep()
+
+	assert.True(t, i.has(1))
+	assert.True(t, i.has(2))
+	assert.False(t, i.has(3))
+	assert.False(t, i.has(4))
+
+	i.startNewGeneration()
+	i.mark(2)
+	i.mark(3)
+	i.sweep()
+
+	assert.False(t, i.has(1))
+	assert.True(t, i.has(2))
+	assert.True(t, i.has(3))
+	assert.False(t, i.has(4))
+
+	i.startNewGeneration()
+	i.mark(3)
+	i.mark(4)
+	i.sweep()
+
+	assert.False(t, i.has(1))
+	assert.False(t, i.has(2))
+	assert.True(t, i.has(3))
+	assert.True(t, i.has(4))
+}