Refactor proctor binaries to implement testRunner interface.

Shared code among proctor-*.go files has been refactored
into common/common.go. The common package is imported in
each proctor binary and a struct is created to implement
the testRunner interface defined in common.go. This allows
for the proctor binaries to be updated without having to
copy/paste the same code across all files. There are no
usage or functionality changes.

PiperOrigin-RevId: 260967080

2 files changed, 95 insertions, 0 deletions

diff --git a/test/runtimes/common/BUILD b/test/runtimes/common/BUILD
new file mode 100644
index 000000000..7147e841a
--- /dev/null
+++ b/test/runtimes/common/BUILD
@@ -0,0 +1,10 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+package(licenses = ["notice"])
+
+go_library(
+    name = "common",
+    srcs = ["common.go"],
+    importpath = "gvisor.dev/gvisor/test/runtimes/common",
+    visibility = ["//:sandbox"],
+)
diff --git a/test/runtimes/common/common.go b/test/runtimes/common/common.go
new file mode 100644
index 000000000..3f289d459
--- /dev/null
+++ b/test/runtimes/common/common.go
@@ -0,0 +1,85 @@
+// Copyright 2019 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 common executes functions for proctor binaries.
+package common
+
+import (
+	"flag"
+	"fmt"
+	"os"
+)
+
+var (
+	list    = flag.Bool("list", false, "list all available tests")
+	test    = flag.String("test", "", "run a single test from the list of available tests")
+	version = flag.Bool("v", false, "print out the version of node that is installed")
+)
+
+// TestRunner is an interface to be implemented in each proctor binary.
+type TestRunner interface {
+	// ListTests returns a string slice of tests available to run.
+	ListTests() ([]string, error)
+
+	// RunTest runs a single test.
+	RunTest(test string) error
+}
+
+// LaunchFunc parses flags passed by a proctor binary and calls the requested behavior.
+func LaunchFunc(tr TestRunner) error {
+	flag.Parse()
+
+	if *list && *test != "" {
+		flag.PrintDefaults()
+		return fmt.Errorf("cannot specify 'list' and 'test' flags simultaneously")
+	}
+	if *list {
+		tests, err := tr.ListTests()
+		if err != nil {
+			return fmt.Errorf("failed to list tests: %v", err)
+		}
+		for _, test := range tests {
+			fmt.Println(test)
+		}
+		return nil
+	}
+	if *version {
+		fmt.Println(os.Getenv("LANG_NAME"), "version:", os.Getenv("LANG_VER"), "is installed.")
+		return nil
+	}
+	if *test != "" {
+		if err := tr.RunTest(*test); err != nil {
+			return fmt.Errorf("test %q failed to run: %v", *test, err)
+		}
+		return nil
+	}
+
+	if err := runAllTests(tr); err != nil {
+		return fmt.Errorf("error running all tests: %v", err)
+	}
+	return nil
+}
+
+func runAllTests(tr TestRunner) error {
+	tests, err := tr.ListTests()
+	if err != nil {
+		return fmt.Errorf("failed to list tests: %v", err)
+	}
+	for _, test := range tests {
+		if err := tr.RunTest(test); err != nil {
+			return fmt.Errorf("test %q failed to run: %v", test, err)
+		}
+	}
+	return nil
+}