squash merge from dev branch

vendor/gopkg.in/alecthomas/kingpin.v2/usage_test.go

@@ -0,0 +1,65 @@
+package kingpin
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	"github.com/alecthomas/assert"
+)
+
+func TestFormatTwoColumns(t *testing.T) {
+	buf := bytes.NewBuffer(nil)
+	formatTwoColumns(buf, 2, 2, 20, [][2]string{
+		{"--hello", "Hello world help with something that is cool."},
+	})
+	expected := `  --hello  Hello
+           world
+           help with
+           something
+           that is
+           cool.
+`
+	assert.Equal(t, expected, buf.String())
+}
+
+func TestFormatTwoColumnsWide(t *testing.T) {
+	samples := [][2]string{
+		{strings.Repeat("x", 29), "29 chars"},
+		{strings.Repeat("x", 30), "30 chars"}}
+	buf := bytes.NewBuffer(nil)
+	formatTwoColumns(buf, 0, 0, 200, samples)
+	expected := `xxxxxxxxxxxxxxxxxxxxxxxxxxxxx29 chars
+xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+                             30 chars
+`
+	assert.Equal(t, expected, buf.String())
+}
+
+func TestHiddenCommand(t *testing.T) {
+	templates := []struct{ name, template string }{
+		{"default", DefaultUsageTemplate},
+		{"Compact", CompactUsageTemplate},
+		{"Long", LongHelpTemplate},
+		{"Man", ManPageTemplate},
+	}
+
+	var buf bytes.Buffer
+	t.Log("1")
+
+	a := New("test", "Test").Writer(&buf).Terminate(nil)
+	a.Command("visible", "visible")
+	a.Command("hidden", "hidden").Hidden()
+
+	for _, tp := range templates {
+		buf.Reset()
+		a.UsageTemplate(tp.template)
+		a.Parse(nil)
+		// a.Parse([]string{"--help"})
+		usage := buf.String()
+		t.Logf("Usage for %s is:\n%s\n", tp.name, usage)
+
+		assert.NotContains(t, usage, "hidden")
+		assert.Contains(t, usage, "visible")
+	}
+}