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/credentials/alts/utils_test.go

@@ -0,0 +1,66 @@
+/*
+ *
+ * Copyright 2018 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 alts
+
+import (
+	"io"
+	"strings"
+	"testing"
+)
+
+func TestIsRunningOnGCP(t *testing.T) {
+	for _, tc := range []struct {
+		description string
+		testOS      string
+		testReader  io.Reader
+		out         bool
+	}{
+		// Linux tests.
+		{"linux: not a GCP platform", "linux", strings.NewReader("not GCP"), false},
+		{"Linux: GCP platform (Google)", "linux", strings.NewReader("Google"), true},
+		{"Linux: GCP platform (Google Compute Engine)", "linux", strings.NewReader("Google Compute Engine"), true},
+		{"Linux: GCP platform (Google Compute Engine) with extra spaces", "linux", strings.NewReader("  Google Compute Engine        "), true},
+		// Windows tests.
+		{"windows: not a GCP platform", "windows", strings.NewReader("not GCP"), false},
+		{"windows: GCP platform (Google)", "windows", strings.NewReader("Google"), true},
+		{"windows: GCP platform (Google) with extra spaces", "windows", strings.NewReader("  Google     "), true},
+	} {
+		reverseFunc := setup(tc.testOS, tc.testReader)
+		if got, want := isRunningOnGCP(), tc.out; got != want {
+			t.Errorf("%v: isRunningOnGCP()=%v, want %v", tc.description, got, want)
+		}
+		reverseFunc()
+	}
+}
+
+func setup(testOS string, testReader io.Reader) func() {
+	tmpOS := runningOS
+	tmpReader := manufacturerReader
+
+	// Set test OS and reader function.
+	runningOS = testOS
+	manufacturerReader = func() (io.Reader, error) {
+		return testReader, nil
+	}
+
+	return func() {
+		runningOS = tmpOS
+		manufacturerReader = tmpReader
+	}
+}