test(munit): add tests for munit

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "cSpell.words": [
+        "MINIT"
+    ]
+}

pkg/munit/load_args.go

@@ -0,0 +1,50 @@
+package munit
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+// LoadArgs loads unit from command line arguments
+func LoadArgs(args []string) (unit Unit, ok bool, err error) {
+	var opts []string
+
+	// fix a history issue
+	for len(args) > 0 {
+		if filepath.Base(args[0]) == "minit" {
+			args = args[1:]
+		} else {
+			break
+		}
+	}
+
+	// extract arguments after '--' if existed
+	for i, item := range args {
+		if item == "--" {
+			opts = args[0:i]
+			args = args[i+1:]
+			break
+		}
+	}
+
+	if len(args) == 0 {
+		return
+	}
+
+	unit = Unit{
+		Name:    "arg-main",
+		Kind:    KindDaemon,
+		Command: args,
+	}
+
+	// opts decoding
+	for _, opt := range opts {
+		if strings.HasSuffix(opt, "-"+KindOnce) {
+			unit.Kind = KindOnce
+		}
+	}
+
+	ok = true
+
+	return
+}