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unmarshal_test.go
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unmarshal_test.go
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package goxtag
import (
"fmt"
"github.com/stretchr/testify/assert"
"golang.org/x/net/html"
"strconv"
"testing"
)
const testPage = `<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8" />
</head>
<body>
<h1>
<ul id="resources">
<li class="resource" order="3">
<div class="name">Foo</div>
</li>
<li class="resource" order="1">
<div class="name">Bar</div>
</li>
<li class="resource" order="4">
<div class="name">Baz</div>
</li>
<li class="resource" order="2">
<div class="name">Bang</div>
</li>
<li class="resource" order="5">
<div class="name">Zip</div>
</li>
</ul>
<div class="name"></div>
<div class="some-div">Some div</div>
<h2 id="anchor-header"><a href="https://foo.com">FOO!!!</a></h2>
</h1>
<ul id="structured-list">
<li name="foo" val="flip">foo</li>
<li name="bar" val="flip">bar</li>
<li name="baz" val="flip">baz</li>
</ul>
<ul id="nested-map">
<ul name="first">
<li name="foo">foo</li>
<li name="bar">bar</li>
<li name="baz">baz</li>
</ul>
<ul name="second">
<li name="bang">bang</li>
<li name="ring">ring</li>
<li name="fling">fling</li>
</ul>
</ul>
<div class="foobar">
<thing foo="yes">1</thing>
<foo arr="true">true</foo>
<bar arr="true">false</bar>
<float>1.2345</float>
<int>-123</int>
<uint>100</uint>
</div>
<div class="span">
1
<span class="some class">
2
</span>
3
</div>
</body>
</html>
`
var vals = []string{"Foo", "Bar", "Baz", "Bang", "Zip"}
type ErrorFooBar struct{}
var errTestUnmarshal = fmt.Errorf("A wild error appeared")
func (e *ErrorFooBar) UnmarshalHTML([]*html.Node) error {
return errTestUnmarshal
}
type Page struct {
Resources []Resource `xpath:".//*[@id='resources']//*[contains(concat(' ',normalize-space(@class),' '),' resource ')]"`
FooBar FooBar
}
type Resource struct {
Name string `xpath:".//*[contains(concat(' ',normalize-space(@class),' '),' name ')]"`
}
type FooBar struct {
Attrs []Attr
Val int
unmarshalWasCalled bool
}
type Attr struct {
Key, Value string
}
func (f *FooBar) UnmarshalHTML(nodes []*html.Node) error {
f.unmarshalWasCalled = true
s := NewDocumentWithNodes(nodes)
f.Attrs = []Attr{}
for _, node := range s.Find(".//*[contains(concat(' ',normalize-space(@class),' '),' foobar ')]//thing").Nodes {
for _, attr := range node.Attr {
f.Attrs = append(f.Attrs, Attr{Key: attr.Key, Value: attr.Val})
}
}
thing := s.Find(".//thing")
thingText := thing.Text()
i, err := strconv.Atoi(thingText)
f.Val = i
return err
}
func TestArrayUnmarshal(t *testing.T) {
asrt := assert.New(t)
var a struct {
Resources [5]Resource `xpath:".//*[@id='resources']//*[contains(concat(' ',normalize-space(@class),' '),' resource ')]"`
}
asrt.NoError(Unmarshal([]byte(testPage), &a))
for i, val := range vals {
asrt.Equal(val, a.Resources[i].Name)
}
}
func TestBoolean(t *testing.T) {
asrt := assert.New(t)
var a struct {
BoolTest struct {
Foo bool `xpath:".//foo"`
Bar bool `xpath:".//bar"`
} `xpath:".//*[contains(concat(' ',normalize-space(@class),' '),' foobar ')]"`
}
asrt.NoError(Unmarshal([]byte(testPage), &a))
asrt.Equal(true, a.BoolTest.Foo)
asrt.Equal(false, a.BoolTest.Bar)
}
func TestNumbers(t *testing.T) {
asrt := assert.New(t)
var a struct {
BoolTest struct {
Int int `xpath:".//int"`
Float float32 `xpath:".//float"`
Uint uint16 `xpath:".//uint"`
} `xpath:".//*[contains(concat(' ',normalize-space(@class),' '),' foobar ')]"`
}
asrt.NoError(Unmarshal([]byte(testPage), &a))
asrt.Equal(float32(1.2345), a.BoolTest.Float)
asrt.Equal(-123, a.BoolTest.Int)
asrt.Equal(uint16(100), a.BoolTest.Uint)
}
func TestAttributes(t *testing.T) {
asrt := assert.New(t)
var a struct {
Orders []int `xpath:".//*[@id='resources']//*[contains(concat(' ',normalize-space(@class),' '),' resource ')]/@order"`
Order int `xpath:"(.//*[@id='resources']//*[contains(concat(' ',normalize-space(@class),' '),' resource ')]/@order)[1]"`
}
asrt.NoError(Unmarshal([]byte(testPage), &a))
assert.Equal(t, []int{3, 1, 4, 2, 5}, a.Orders)
assert.Equal(t, 3, a.Order)
}
func TestText(t *testing.T) {
asrt := assert.New(t)
var a struct {
One int `xpath:".//body//div[contains(concat(' ',normalize-space(@class),' '),' span ')]/text()[1]"`
Three int `xpath:".//body//div[contains(concat(' ',normalize-space(@class),' '),' span ')]/text()[2]"`
OneThree string `xpath:".//body//div[contains(concat(' ',normalize-space(@class),' '),' span ')]/text()"`
All string `xpath:".//body//div[contains(concat(' ',normalize-space(@class),' '),' span ')]//text()"`
}
asrt.NoError(Unmarshal([]byte(testPage), &a))
assert.Equal(t, 1, a.One)
assert.Equal(t, 3, a.Three)
assert.Equal(t, "1\n\t\t\t\n\t\t\t3", a.OneThree)
assert.Equal(t, "1\n\t\t\t\n\t\t\t\t2\n\t\t\t\n\t\t\t3", a.All)
}
func TestMultipleNodesError(t *testing.T) {
asrt := assert.New(t)
var a struct {
Order int `xpath:".//*[@id='resources']//*[contains(concat(' ',normalize-space(@class),' '),' resource ')]/@order"`
}
err := Unmarshal([]byte(testPage), &a)
asrt.Error(err)
asrt.Equal(`could not unmarshal into 'int' (type int): multiple nodes detected for selector tag: './/*[@id='resources']//*[contains(concat(' ',normalize-space(@class),' '),' resource ')]/@order'`, err.Error())
}
func TestNotRequired(t *testing.T) {
asrt := assert.New(t)
var a struct {
UnknownStruct *struct {
A int `xpath:".//id"`
} `xpath:".//navbar" xpath_required:"false"`
NotExisted int `xpath:".//*[contains(concat(' ',normalize-space(@class),' '),' name ')]/someTag" xpath_required:"false"`
Existed string `xpath:".//*[contains(concat(' ',normalize-space(@class),' '),' some-div ')]/text()"`
}
asrt.NoError(Unmarshal([]byte(testPage), &a))
assert.Equal(t, 0, a.NotExisted)
assert.Equal(t, "Some div", a.Existed)
assert.Nil(t, a.UnknownStruct)
}
func TestRequiredInt(t *testing.T) {
asrt := assert.New(t)
var a struct {
NotExisted int `xpath:".//*[contains(concat(' ',normalize-space(@class),' '),' name ')]/someTag"`
}
asrt.Error(Unmarshal([]byte(testPage), &a))
}
func TestRequiredStruct(t *testing.T) {
asrt := assert.New(t)
var a struct {
UnknownStruct *struct {
A int `xpath:".//id"`
} `xpath:".//navbar"`
}
err := Unmarshal([]byte(testPage), &a)
asrt.Error(err)
asrt.Equal("could not unmarshal into 'struct { UnknownStruct *struct { A int \"xpath:\\\".//id\\\"\" } \"xpath:\\\".//navbar\\\"\" }' (type struct { UnknownStruct *struct { A int \"xpath:\\\".//id\\\"\" } \"xpath:\\\".//navbar\\\"\" }): node not found in document tag: './/navbar'", err.Error())
}
func TestRequiredSlice(t *testing.T) {
asrt := assert.New(t)
var a struct {
Orders []int `xpath:".//blabla"`
}
err := Unmarshal([]byte(testPage), &a)
asrt.Error(err)
asrt.Equal("could not unmarshal into 'struct { Orders []int \"xpath:\\\".//blabla\\\"\" }' (type struct { Orders []int \"xpath:\\\".//blabla\\\"\" }): node not found in document tag: './/blabla'", err.Error())
}
func TestIgnore(t *testing.T) {
asrt := assert.New(t)
var a struct {
Ignored string `xpath:"-"`
}
asrt.NoError(Unmarshal([]byte(testPage), &a))
assert.Equal(t, "", a.Ignored)
}
func TestUnmarshal(t *testing.T) {
asrt := assert.New(t)
asrt.Implements((*Unmarshaler)(nil), new(FooBar))
var p Page
asrt.NoError(Unmarshal([]byte(testPage), &p))
asrt.Len(p.Resources, 5)
for i, val := range vals {
asrt.Equal(val, p.Resources[i].Name)
}
asrt.True(p.FooBar.unmarshalWasCalled, "Unmarshal should have been called.")
asrt.Equal(1, p.FooBar.Val)
asrt.Len(p.FooBar.Attrs, 1)
asrt.Equal("foo", p.FooBar.Attrs[0].Key)
asrt.Equal("yes", p.FooBar.Attrs[0].Value)
}
func TestUnmarshalError(t *testing.T) {
asrt := assert.New(t)
var a []ErrorFooBar
err := Unmarshal([]byte(testPage), &a)
e := checkErr(asrt, err)
e2 := checkErr(asrt, e.Err)
asrt.Equal(`could not unmarshal into '[]goxtag.ErrorFooBar[0]' (type unknown: invalid value): a custom Unmarshaler implementation threw an error: A wild error appeared`, e.Error())
asrt.Equal(`could not unmarshal : A wild error appeared`, e2.Error())
}
func TestNilUnmarshal(t *testing.T) {
asrt := assert.New(t)
var a *Page
err := Unmarshal([]byte{}, a)
e := checkErr(asrt, err)
asrt.Equal(nilDestination, e.Reason)
}
func TestNonPointer(t *testing.T) {
asrt := assert.New(t)
var a Page
e := checkErr(asrt, Unmarshal([]byte{}, a))
asrt.Equal(nonPointer, e.Reason)
}
func TestWrongArrayLength(t *testing.T) {
asrt := assert.New(t)
var a struct {
Resources [1]Resource `xpath:".//*[contains(concat(' ',normalize-space(@class),' '),' resource ')]"`
}
err := Unmarshal([]byte(testPage), &a)
e := checkErr(asrt, err)
asrt.Equal(typeConversionError, e.Reason)
e2 := checkErr(asrt, e.Err)
asrt.Equal(arrayLengthMismatch, e2.Reason)
asrt.Contains(e.Error(), "Resource")
asrt.Contains(e.Error(), "array length")
}
func TestInvalidLiteral(t *testing.T) {
asrt := assert.New(t)
var a struct {
Foo int `xpath:".//foo"`
}
err := Unmarshal([]byte(testPage), &a)
e := checkErr(asrt, err).unwind()
asrt.Len(e.chain, 2)
asrt.Error(e.tail)
asrt.Contains(err.Error(), e.tail.Error())
asrt.Contains(err.Error(), "\"true\"")
asrt.Equal("true", e.val)
asrt.Equal(typeConversionError, e.chain[0].Reason)
asrt.Equal(typeConversionError, e.chain[1].Reason)
}
func TestInvalidArrayEleType(t *testing.T) {
asrt := assert.New(t)
var a struct {
Resources [5]int `xpath:".//*[contains(concat(' ',normalize-space(@class),' '),' resource ')]"`
}
err := Unmarshal([]byte(testPage), &a)
e := checkErr(asrt, err).unwind()
asrt.Len(e.chain, 3)
}
func TestDirectInsertion(t *testing.T) {
asrt := assert.New(t)
var a struct {
Nodes []*html.Node `xpath:".//ul[@id='resources']//*[contains(concat(' ',normalize-space(@class),' '),' resource ')]"`
}
asrt.NoError(Unmarshal([]byte(testPage), &a))
asrt.Len(a.Nodes, 5)
}
func TestInterfaceDecode(t *testing.T) {
asrt := assert.New(t)
var a struct {
IF interface{} `xpath:".//*[@id='structured-list']//li[2]"`
}
asrt.NoError(Unmarshal([]byte(testPage), &a))
asrt.Equal("bar", a.IF.(string))
}
func checkErr(asrt *assert.Assertions, err error) *CannotUnmarshalError {
asrt.Error(err)
asrt.IsType((*CannotUnmarshalError)(nil), err)
return err.(*CannotUnmarshalError)
}