CRI Provider implementation (#195)

* First commit of CRI provider. Vendor deps not included

* First commit of CRI provider. Vendor deps not included

* Tidy up comments and format code

* vendor grpc, CRI APIs, update protobuf and tidy logging

* First commit of CRI provider. Vendor deps not included

* Tidy up comments and format code

* vendor grpc, CRI APIs, update protobuf and tidy logging

* Add README

* Fix errors in make test

vendor/google.golang.org/grpc/resolver_conn_wrapper_test.go

@@ -0,0 +1,113 @@
+/*
+ *
+ * Copyright 2017 gRPC 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 grpc
+
+import (
+	"fmt"
+	"net"
+	"testing"
+	"time"
+
+	"google.golang.org/grpc/resolver"
+)
+
+func TestParseTarget(t *testing.T) {
+	for _, test := range []resolver.Target{
+		{Scheme: "dns", Authority: "", Endpoint: "google.com"},
+		{Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com"},
+		{Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com/?a=b"},
+		{Scheme: "passthrough", Authority: "", Endpoint: "/unix/socket/address"},
+	} {
+		str := test.Scheme + "://" + test.Authority + "/" + test.Endpoint
+		got := parseTarget(str)
+		if got != test {
+			t.Errorf("parseTarget(%q) = %+v, want %+v", str, got, test)
+		}
+	}
+}
+
+func TestParseTargetString(t *testing.T) {
+	for _, test := range []struct {
+		targetStr string
+		want      resolver.Target
+	}{
+		{targetStr: "", want: resolver.Target{Scheme: "", Authority: "", Endpoint: ""}},
+		{targetStr: ":///", want: resolver.Target{Scheme: "", Authority: "", Endpoint: ""}},
+		{targetStr: "a:///", want: resolver.Target{Scheme: "a", Authority: "", Endpoint: ""}},
+		{targetStr: "://a/", want: resolver.Target{Scheme: "", Authority: "a", Endpoint: ""}},
+		{targetStr: ":///a", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a"}},
+		{targetStr: "a://b/", want: resolver.Target{Scheme: "a", Authority: "b", Endpoint: ""}},
+		{targetStr: "a:///b", want: resolver.Target{Scheme: "a", Authority: "", Endpoint: "b"}},
+		{targetStr: "://a/b", want: resolver.Target{Scheme: "", Authority: "a", Endpoint: "b"}},
+		{targetStr: "a://b/c", want: resolver.Target{Scheme: "a", Authority: "b", Endpoint: "c"}},
+		{targetStr: "dns:///google.com", want: resolver.Target{Scheme: "dns", Authority: "", Endpoint: "google.com"}},
+		{targetStr: "dns://a.server.com/google.com", want: resolver.Target{Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com"}},
+		{targetStr: "dns://a.server.com/google.com/?a=b", want: resolver.Target{Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com/?a=b"}},
+
+		{targetStr: "/", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "/"}},
+		{targetStr: "google.com", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "google.com"}},
+		{targetStr: "google.com/?a=b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "google.com/?a=b"}},
+		{targetStr: "/unix/socket/address", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "/unix/socket/address"}},
+
+		// If we can only parse part of the target.
+		{targetStr: "://", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "://"}},
+		{targetStr: "unix://domain", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "unix://domain"}},
+		{targetStr: "a:b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a:b"}},
+		{targetStr: "a/b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a/b"}},
+		{targetStr: "a:/b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a:/b"}},
+		{targetStr: "a//b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a//b"}},
+		{targetStr: "a://b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a://b"}},
+	} {
+		got := parseTarget(test.targetStr)
+		if got != test.want {
+			t.Errorf("parseTarget(%q) = %+v, want %+v", test.targetStr, got, test.want)
+		}
+	}
+}
+
+// The target string with unknown scheme should be kept unchanged and passed to
+// the dialer.
+func TestDialParseTargetUnknownScheme(t *testing.T) {
+	for _, test := range []struct {
+		targetStr string
+		want      string
+	}{
+		{"/unix/socket/address", "/unix/socket/address"},
+
+		// Special test for "unix:///".
+		{"unix:///unix/socket/address", "unix:///unix/socket/address"},
+
+		// For known scheme.
+		{"passthrough://a.server.com/google.com", "google.com"},
+	} {
+		dialStrCh := make(chan string, 1)
+		cc, err := Dial(test.targetStr, WithInsecure(), WithDialer(func(t string, _ time.Duration) (net.Conn, error) {
+			dialStrCh <- t
+			return nil, fmt.Errorf("test dialer, always error")
+		}))
+		if err != nil {
+			t.Fatalf("Failed to create ClientConn: %v", err)
+		}
+		got := <-dialStrCh
+		cc.Close()
+		if got != test.want {
+			t.Errorf("Dial(%q), dialer got %q, want %q", test.targetStr, got, test.want)
+		}
+	}
+}