mirror of https://github.com/grpc/grpc-go.git
118 lines
3.9 KiB
Go
118 lines
3.9 KiB
Go
/*
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*
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* Copyright 2020 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package resolver
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import (
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"context"
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"fmt"
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"regexp"
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"testing"
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"github.com/cespare/xxhash"
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"github.com/google/go-cmp/cmp"
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iresolver "google.golang.org/grpc/internal/resolver"
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"google.golang.org/grpc/metadata"
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_ "google.golang.org/grpc/xds/internal/balancer/cdsbalancer" // To parse LB config
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"google.golang.org/grpc/xds/internal/xdsclient"
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)
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func (s) TestPruneActiveClusters(t *testing.T) {
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r := &xdsResolver{activeClusters: map[string]*clusterInfo{
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"zero": {refCount: 0},
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"one": {refCount: 1},
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"two": {refCount: 2},
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"anotherzero": {refCount: 0},
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}}
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want := map[string]*clusterInfo{
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"one": {refCount: 1},
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"two": {refCount: 2},
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}
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r.pruneActiveClusters()
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if d := cmp.Diff(r.activeClusters, want, cmp.AllowUnexported(clusterInfo{})); d != "" {
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t.Fatalf("r.activeClusters = %v; want %v\nDiffs: %v", r.activeClusters, want, d)
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}
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}
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func (s) TestGenerateRequestHash(t *testing.T) {
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cs := &configSelector{
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r: &xdsResolver{
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cc: &testClientConn{},
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},
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}
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tests := []struct {
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name string
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hashPolicies []*xdsclient.HashPolicy
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requestHashWant uint64
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rpcInfo iresolver.RPCInfo
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}{
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// TestGenerateRequestHashHeaders tests generating request hashes for
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// hash policies that specify to hash headers.
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{
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name: "test-generate-request-hash-headers",
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hashPolicies: []*xdsclient.HashPolicy{{
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HashPolicyType: xdsclient.HashPolicyTypeHeader,
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HeaderName: ":path",
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Regex: func() *regexp.Regexp { return regexp.MustCompile("/products") }(), // Will replace /products with /new-products, to test find and replace functionality.
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RegexSubstitution: "/new-products",
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}},
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requestHashWant: xxhash.Sum64String("/new-products"),
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rpcInfo: iresolver.RPCInfo{
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Context: metadata.NewIncomingContext(context.Background(), metadata.Pairs(":path", "/products")),
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Method: "/some-method",
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},
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},
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// TestGenerateHashChannelID tests generating request hashes for hash
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// policies that specify to hash something that uniquely identifies the
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// ClientConn (the pointer).
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{
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name: "test-generate-request-hash-channel-id",
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hashPolicies: []*xdsclient.HashPolicy{{
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HashPolicyType: xdsclient.HashPolicyTypeChannelID,
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}},
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requestHashWant: xxhash.Sum64String(fmt.Sprintf("%p", &cs.r.cc)),
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rpcInfo: iresolver.RPCInfo{},
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},
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// TestGenerateRequestHashEmptyString tests generating request hashes
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// for hash policies that specify to hash headers and replace empty
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// strings in the headers.
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{
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name: "test-generate-request-hash-empty-string",
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hashPolicies: []*xdsclient.HashPolicy{{
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HashPolicyType: xdsclient.HashPolicyTypeHeader,
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HeaderName: ":path",
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Regex: func() *regexp.Regexp { return regexp.MustCompile("") }(),
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RegexSubstitution: "e",
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}},
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requestHashWant: xxhash.Sum64String("eaebece"),
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rpcInfo: iresolver.RPCInfo{
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Context: metadata.NewIncomingContext(context.Background(), metadata.Pairs(":path", "abc")),
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Method: "/some-method",
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},
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},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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requestHashGot := cs.generateHash(test.rpcInfo, test.hashPolicies)
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if requestHashGot != test.requestHashWant {
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t.Fatalf("requestHashGot = %v, requestHashWant = %v", requestHashGot, test.requestHashWant)
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}
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})
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}
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}
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