From be47274f79eb0843da4d805cfc417fbf7921379c Mon Sep 17 00:00:00 2001
From: Sebastien Douheret <sebastien.douheret@iot.bzh>
Date: Tue, 6 Nov 2018 18:17:32 +0100
Subject: [PATCH] Check dependency tools before running tests

Add a check of all dependency tools before running tests in order to
report a clear error instead of a cryptic test failure.

Change-Id: I7b642428fb4ada7eec2de0c4c45f612ae6888b33
Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>
---
 test/config.go    | 10 ++++++++++
 test/main_test.go | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/test/config.go b/test/config.go
index 0b3ce76..804b0b1 100644
--- a/test/config.go
+++ b/test/config.go
@@ -33,3 +33,13 @@ const (
 	helloworldFixturesDir    = "fixtures/helloworld"
 	sshFixturesDir           = "fixtures/ssh"
 )
+
+var dependency_tools = [...]string{
+	"cmake",
+	"make",
+	"gcc",
+	"c++",
+	"python3",
+	"wget",
+	"jq",
+}
diff --git a/test/main_test.go b/test/main_test.go
index 273df09..bdea40c 100644
--- a/test/main_test.go
+++ b/test/main_test.go
@@ -82,6 +82,35 @@ func Copy(src, dst string) error {
 	return out.Close()
 }
 
+// init function will run once before execution of test functions begins.
+func init() {
+	// Check dependency
+	err := checkTestDep()
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+// isCommandAvailable verify if a command/utility is available
+func isCommandAvailable(name string) bool {
+	cmd := exec.Command("/bin/sh", "-c", "command -v "+name)
+	if err := cmd.Run(); err != nil {
+		return false
+	}
+	return true
+}
+
+// checkTestDep checks if all dependency tools are available to be able to run tests
+func checkTestDep() error {
+	for _, cmd := range dependency_tools {
+		if !isCommandAvailable(cmd) {
+			return fmt.Errorf(cmd + " is not installed and is mandatory to run tests")
+		}
+	}
+	return nil
+}
+
+// initEnv
 func initEnv(launchProcess bool) {
 	if launchProcess {
 		/*kill xds-server if needed*/
@@ -133,6 +162,7 @@ func launchXdsServer(proc **os.Process) *os.File {
 	return file
 }
 
+// getHTTPClient
 func getHTTPClient(lvl int) (*common.HTTPClient, *os.File) {
 	logFile := logDir + logFileClient
 	file, err := os.OpenFile(logFile, os.O_CREATE|os.O_WRONLY, 0644)
@@ -192,7 +222,10 @@ func NewIoSocketClient(url, clientID string) (*IOSockClient, error) {
 	log.Printf("Connect websocket with url=%v clientId=%v\n", prefixURL, HTTPCli.GetClientID())
 	return sCli, nil
 }
+
+// TestMain is the main entry point of testsuite
 func TestMain(m *testing.M) {
+
 	/* useful for debugging, preventing from launching xds-server
 	 * it can be launch separately */
 	launchProcess := true
-- 
2.16.6