Test functions 236 (#355)

A single CLI command to invoke a function, print results, and get logs if the function fails. Meant to be an easy way to do testing from the CLI.

fission/main.go

@@ -47,8 +47,11 @@ func main() {
 	fnFollowFlag := cli.BoolFlag{Name: "follow, f", Usage: "specify if the logs should be streamed"}
 	fnDetailFlag := cli.BoolFlag{Name: "detail, d", Usage: "display detailed information"}
 	fnLogDBTypeFlag := cli.StringFlag{Name: "dbtype", Usage: "log database type, e.g. influxdb (currently only influxdb is supported)"}
+	fnBodyFlag := cli.StringFlag{Name: "body, b", Usage: "request body"}
+	fnHeaderFlag := cli.StringSliceFlag{Name: "header, H", Usage: "request headers"}
 	fnEntryPointFlag := cli.StringFlag{Name: "entrypoint", Usage: "entry point for environment v2 to load with"}
 	fnBuildCmdFlag := cli.StringFlag{Name: "buildcmd", Usage: "build command for builder to run with"}
+
 	fnSubcommands := []cli.Command{
 		{Name: "create", Usage: "Create new function (and optionally, an HTTP route to it)", Flags: []cli.Flag{fnNameFlag, fnEnvNameFlag, fnCodeFlag, fnPackageFlag, fnSrcArchiveFlag, fnDeployArchiveFlag, fnEntryPointFlag, fnBuildCmdFlag, htUrlFlag, htMethodFlag}, Action: fnCreate},
 		{Name: "get", Usage: "Get function source code", Flags: []cli.Flag{fnNameFlag}, Action: fnGet},
@@ -58,6 +61,7 @@ func main() {
 		{Name: "list", Usage: "List all functions", Flags: []cli.Flag{}, Action: fnList},
 		{Name: "logs", Usage: "Display function logs", Flags: []cli.Flag{fnNameFlag, fnPodFlag, fnFollowFlag, fnDetailFlag, fnLogDBTypeFlag}, Action: fnLogs},
 		{Name: "pods", Usage: "Display function pods", Flags: []cli.Flag{fnNameFlag, fnLogDBTypeFlag}, Action: fnPods},
+		{Name: "test", Usage: "Test a function", Flags: []cli.Flag{fnNameFlag, fnEnvNameFlag, fnCodeFlag, fnPackageFlag, fnSrcArchiveFlag, htMethodFlag, fnBodyFlag, fnHeaderFlag}, Action: fnTest},
 	}
 
 	// httptriggers