Allow "bare" tags and moved tag tests into tag_test.go. Fixes #19

tag_test.go

@@ -0,0 +1,95 @@
+package kong
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestDefaultValueForOptionalArg(t *testing.T) {
+	var cli struct {
+		Arg string `kong:"arg,optional,default='👌'"`
+	}
+	p := mustNew(t, &cli)
+	_, err := p.Parse(nil)
+	require.NoError(t, err)
+	require.Equal(t, "👌", cli.Arg)
+}
+
+func TestNoValueInTag(t *testing.T) {
+	var cli struct {
+		Empty1 string `kong:"default"`
+		Empty2 string `kong:"default="`
+	}
+	p := mustNew(t, &cli)
+	_, err := p.Parse(nil)
+	require.NoError(t, err)
+	require.Equal(t, "", cli.Empty1)
+	require.Equal(t, "", cli.Empty2)
+}
+
+func TestCommaInQuotes(t *testing.T) {
+	var cli struct {
+		Numbers string `kong:"default='1,2'"`
+	}
+	p := mustNew(t, &cli)
+	_, err := p.Parse(nil)
+	require.NoError(t, err)
+	require.Equal(t, "1,2", cli.Numbers)
+}
+
+func TestBadString(t *testing.T) {
+	var cli struct {
+		Numbers string `kong:"default='yay'n"`
+	}
+	_, err := New(&cli)
+	require.Error(t, err)
+}
+
+func TestNoQuoteEnd(t *testing.T) {
+	var cli struct {
+		Numbers string `kong:"default='yay"`
+	}
+	_, err := New(&cli)
+	require.Error(t, err)
+}
+
+func TestEscapedQuote(t *testing.T) {
+	var cli struct {
+		DoYouKnow string `kong:"default='i don\\'t know'"`
+	}
+	p := mustNew(t, &cli)
+	_, err := p.Parse(nil)
+	require.NoError(t, err)
+	require.Equal(t, "i don't know", cli.DoYouKnow)
+}
+
+func TestBareTags(t *testing.T) {
+	var cli struct {
+		Cmd struct {
+			Arg  string `arg`
+			Flag string `required default:"👌"`
+		} `cmd`
+	}
+
+	p := mustNew(t, &cli)
+	_, err := p.Parse([]string{"cmd", "arg", "--flag=hi"})
+	require.NoError(t, err)
+	require.Equal(t, "hi", cli.Cmd.Flag)
+	require.Equal(t, "arg", cli.Cmd.Arg)
+}
+
+func TestBareTagsWithJsonTag(t *testing.T) {
+	var cli struct {
+		Cmd struct {
+			Arg  string `json:"-" optional arg`
+			Flag string `json:"best_flag" default:"\"'👌'\""`
+		} `cmd json:"CMD"`
+	}
+
+	p := mustNew(t, &cli)
+	_, err := p.Parse([]string{"cmd"})
+	require.NoError(t, err)
+	require.Equal(t, "\"'👌'\"", cli.Cmd.Flag)
+	require.Equal(t, "", cli.Cmd.Arg)
+}