// Copyright 2013-2022 The Cobra Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package cobra

import (
	"testing"
	"text/template"
)

func assertNoErr(t *testing.T, e error) {
	if e != nil {
		t.Error(e)
	}
}

func TestAddTemplateFunctions(t *testing.T) {
	AddTemplateFunc("t", func() bool { return true })
	AddTemplateFuncs(template.FuncMap{
		"f": func() bool { return false },
		"h": func() string { return "Hello," },
		"w": func() string { return "world." }})

	c := &Command{}
	c.SetUsageTemplate(`{{if t}}{{h}}{{end}}{{if f}}{{h}}{{end}} {{w}}`)

	const expected = "Hello, world."
	if got := c.UsageString(); got != expected {
		t.Errorf("Expected UsageString: %v\nGot: %v", expected, got)
	}
}