Add more tests

options.go

@@ -28,6 +28,12 @@ const (
 	DebugUsage   = "Print all commands to ~/.config/smug/smug.log"
 )
 
+// Creates a new FlagSet.
+// Moved it to a variable to be able to override it in the tests.
+var NewFlagSet = func(cmd string) *pflag.FlagSet {
+	return pflag.NewFlagSet(cmd, pflag.ContinueOnError)
+}
+
 func ParseOptions(argv []string, helpRequested func()) (Options, error) {
 	if len(argv) < 2 {
 		helpRequested()
@@ -37,7 +43,8 @@ func ParseOptions(argv []string, helpRequested func()) (Options, error) {
 	cmd := argv[0]
 	project := argv[1]
 
-	flags := pflag.NewFlagSet(cmd, 0)
+	flags := NewFlagSet(cmd)
+
 	windows := flags.StringArrayP("windows", "w", []string{}, WindowsUsage)
 	attach := flags.BoolP("attach", "a", false, AttachUsage)
 	debug := flags.BoolP("debug", "d", false, DebugUsage)

options_test.go

@@ -3,44 +3,87 @@ package main
 import (
 	"reflect"
 	"testing"
+
+	"github.com/spf13/pflag"
 )
 
 var usageTestTable = []struct {
-	argv []string
-	opts Options
+	argv      []string
+	opts      Options
+	err       error
+	helpCalls int
 }{
 	{
 		[]string{"start", "smug"},
 		Options{"start", "smug", []string{}, false, false},
+		nil,
+		0,
 	},
 	{
 		[]string{"start", "smug", "-w", "foo"},
 		Options{"start", "smug", []string{"foo"}, false, false},
+		nil,
+		0,
 	},
 	{
 		[]string{"start", "smug:foo,bar"},
 		Options{"start", "smug", []string{"foo", "bar"}, false, false},
+		nil,
+		0,
 	},
 	{
 		[]string{"start", "smug", "--attach", "--debug"},
 		Options{"start", "smug", []string{}, true, true},
+		nil,
+		0,
 	},
 	{
 		[]string{"start", "smug", "-ad"},
 		Options{"start", "smug", []string{}, true, true},
+		nil,
+		0,
+	},
+	{
+		[]string{"start"},
+		Options{},
+		ErrHelp,
+		1,
+	},
+	{
+		[]string{"start", "--help"},
+		Options{},
+		ErrHelp,
+		1,
 	},
 }
 
 func TestParseOptions(t *testing.T) {
-	for _, v := range usageTestTable {
-		opts, err := ParseOptions(v.argv, func() {})
+	helpCalls := 0
+	helpRequested := func() {
+		helpCalls++
+	}
 
-		if err != nil {
-			t.Fail()
-		}
+	NewFlagSet = func(cmd string) *pflag.FlagSet {
+		flagSet := pflag.NewFlagSet(cmd, pflag.ContinueOnError)
+		flagSet.Usage = helpRequested
+		return flagSet
+	}
+
+	for _, v := range usageTestTable {
+		opts, err := ParseOptions(v.argv, helpRequested)
 
 		if !reflect.DeepEqual(v.opts, opts) {
 			t.Errorf("expected struct %v, got %v", v.opts, opts)
 		}
+
+		if helpCalls != v.helpCalls {
+			t.Errorf("expected to get %d help calls, got %d", v.helpCalls, helpCalls)
+		}
+
+		if err != v.err {
+			t.Errorf("expected to get error %v, got %v", v.err, err)
+		}
+
+		helpCalls = 0
 	}
 }