cast/cast_test.go

// Copyright © 2014 Steve Francia <spf@spf13.com>.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.

package cast

import (
	"testing"

	"html/template"

	"github.com/stretchr/testify/assert"
)

func TestToInt(t *testing.T) {
	var eight interface{} = 8
	assert.Equal(t, ToInt(8), 8)
	assert.Equal(t, ToInt(8.31), 8)
	assert.Equal(t, ToInt("8"), 8)
	assert.Equal(t, ToInt(true), 1)
	assert.Equal(t, ToInt(false), 0)
	assert.Equal(t, ToInt(eight), 8)
}

func TestToFloat64(t *testing.T) {
	var eight interface{} = 8
	assert.Equal(t, ToFloat64(8), 8.00)
	assert.Equal(t, ToFloat64(8.31), 8.31)
	assert.Equal(t, ToFloat64("8.31"), 8.31)
	assert.Equal(t, ToFloat64(eight), 8.0)
}

func TestToString(t *testing.T) {
	var foo interface{} = "one more time"
	assert.Equal(t, ToString(8), "8")
	assert.Equal(t, ToString(8.12), "8.12")
	assert.Equal(t, ToString([]byte("one time")), "one time")
	assert.Equal(t, ToString(template.HTML("one time")), "one time")
	assert.Equal(t, ToString(foo), "one more time")
	assert.Equal(t, ToString(nil), "")
}

type foo struct {
	val string
}

func (x foo) String() string {
	return x.val
}

func TestStringerToString(t *testing.T) {

	var x foo
	x.val = "bar"
	assert.Equal(t, "bar", ToString(x))
}

type fu struct {
	val string
}

func (x fu) Error() string {
	return x.val
}

func TestErrorToString(t *testing.T) {
	var x fu
	x.val = "bar"
	assert.Equal(t, "bar", ToString(x))
}

func TestMaps(t *testing.T) {
	var taxonomies = map[interface{}]interface{}{"tag": "tags", "group": "groups"}
	var stringMapBool = map[interface{}]interface{}{"v1": true, "v2": false}
	assert.Equal(t, ToStringMap(taxonomies), map[string]interface{}{"tag": "tags", "group": "groups"})
	assert.Equal(t, ToStringMapBool(stringMapBool), map[string]bool{"v1": true, "v2": false})
}

func TestSlices(t *testing.T) {
	assert.Equal(t, []string{"a", "b"}, ToStringSlice([]string{"a", "b"}))
	assert.Equal(t, []string{"1", "3"}, ToStringSlice([]interface{}{1, 3}))
	assert.Equal(t, []int{1, 3}, ToIntSlice([]int{1, 3}))
	assert.Equal(t, []int{1, 3}, ToIntSlice([]interface{}{1.2, 3.2}))
}

func TestToBool(t *testing.T) {
	assert.Equal(t, ToBool(0), false)
	assert.Equal(t, ToBool(nil), false)
	assert.Equal(t, ToBool("false"), false)
	assert.Equal(t, ToBool("FALSE"), false)
	assert.Equal(t, ToBool("False"), false)
	assert.Equal(t, ToBool("f"), false)
	assert.Equal(t, ToBool("F"), false)
	assert.Equal(t, ToBool(false), false)
	assert.Equal(t, ToBool("foo"), false)

	assert.Equal(t, ToBool("true"), true)
	assert.Equal(t, ToBool("TRUE"), true)
	assert.Equal(t, ToBool("True"), true)
	assert.Equal(t, ToBool("t"), true)
	assert.Equal(t, ToBool("T"), true)
	assert.Equal(t, ToBool(1), true)
	assert.Equal(t, ToBool(true), true)
	assert.Equal(t, ToBool(-1), true)
}

func TestIndirectPointers(t *testing.T) {
	x := 13
	y := &x
	z := &y

	assert.Equal(t, ToInt(y), 13)
	assert.Equal(t, ToInt(z), 13)
}