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decoder_test.go
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package html
import (
"github.com/stretchr/testify/assert"
"strings"
"testing"
)
// Simple usecases
func TestLoadIntoSimpleStruct(t *testing.T) {
type simpleStruct struct {
Foo string `css:".foo"`
Bar string `css:".bar"`
}
html := `<body><p class="foo">This is the value of foo</p><p class="bar">This is the value of bar</p></body>`
var s simpleStruct
err := NewDecoder(strings.NewReader(html)).Decode(&s)
assert.NoError(t, err)
assert.Equal(t, "This is the value of foo", s.Foo)
assert.Equal(t, "This is the value of bar", s.Bar)
}
func TestLoadIntoStructWithSubStruct(t *testing.T) {
type complexStruct struct {
Foo string `css:".foo"`
Bar struct {
Baz string `css:".baz"`
} `css:".bar"`
}
//language=html
html := `<body>
<p class="foo">This is foo</p>
<div class="bar">
<p class="baz">This is baz</p>
</div>
</body>`
var c complexStruct
err := NewDecoder(strings.NewReader(html)).Decode(&c)
assert.NoError(t, err)
assert.Equal(t, "This is foo", c.Foo)
assert.Equal(t, "This is baz", c.Bar.Baz)
}
func TestLoadIntoStructWithSimpleSubSlice(t *testing.T) {
type sliceStruct struct {
Foo string `css:".foo"`
Bar []string `css:".bar"`
}
//language=html
html := `<body>
<p class="foo">This is foo</p>
<div>
<p class="bar">Bar 1</p>
<p class="bar">Bar 2</p>
<p class="bar">Bar 3</p>
</div>
</body>`
var s sliceStruct
err := NewDecoder(strings.NewReader(html)).Decode(&s)
assert.NoError(t, err)
assert.Equal(t, "This is foo", s.Foo)
assert.Equal(t, "Bar 1", s.Bar[0])
assert.Equal(t, "Bar 2", s.Bar[1])
assert.Equal(t, "Bar 3", s.Bar[2])
}
func TestLoadIntoStructWithStructSlice(t *testing.T) {
type sliceStruct struct {
Foo string `css:".foo"`
Bar []struct {
Baz string `css:".baz"`
} `css:".bar"`
}
//language=html
html := `<body>
<p class="foo">This is a foo</p>
<div class="bar">
<p class="baz">Bazinga</p>
</div>
<div class="bar">
<p class="baz">Bazooka</p>
</div>
</body>`
var c sliceStruct
err := NewDecoder(strings.NewReader(html)).Decode(&c)
assert.NoError(t, err)
assert.Equal(t, "This is a foo", c.Foo)
assert.Equal(t, "Bazinga", c.Bar[0].Baz)
assert.Equal(t, "Bazooka", c.Bar[1].Baz)
}
func TestLoadFromAttribute(t *testing.T) {
type attrStruct struct {
Foo string `css:".foo"`
Link string `css:".foo" extract:"attr" attr:"href"`
}
//language=html
html := `<body><a class="foo" href="http://github.com/zlepper/encoding-html">Link to encoding-html on GitHub</a></body>`
var a attrStruct
err := Unmarshal([]byte(html), &a)
assert.NoError(t, err)
assert.Equal(t, "Link to encoding-html on GitHub", a.Foo)
assert.Equal(t, "http://github.com/zlepper/encoding-html", a.Link)
}
// Odd edgecases that I want to make sure are handled
func TestLoadIntoStructWithSlicePointers(t *testing.T) {
return
type sliceStruct struct {
Foo string `css:".foo"`
Bar []*struct {
Baz string `css:".baz"`
} `css:".bar"`
}
//language=html
html := `<body>
<p class="foo">This is a foo</p>
<div class="bar">
<p class="baz">Bazinga</p>
</div>
<div class="bar">
<p class="baz">Bazooka</p>
</div>
</body>`
var c sliceStruct
err := NewDecoder(strings.NewReader(html)).Decode(&c)
assert.NoError(t, err)
assert.Equal(t, "This is a foo", c.Foo)
assert.Equal(t, "Bazinga", c.Bar[0].Baz)
assert.Equal(t, "Bazooka", c.Bar[1].Baz)
}
func TestCanDecodeAllStandardTypes(t *testing.T) {
type allTypesStruct struct {
Bool bool `css:".bool"`
Byte byte `css:".byte"`
Float32 float32 `css:".float32"`
Float64 float64 `css:".float64"`
Int int `css:".int"`
Int8 int8 `css:".int8"`
Int16 int16 `css:".int16"`
Int32 int32 `css:".int32"`
Int64 int64 `css:".int64"`
String string `css:".string"`
UInt uint `css:".uint"`
UInt8 uint8 `css:".uint8"`
UInt16 uint16 `css:".uint16"`
UInt32 uint32 `css:".uint32"`
UInt64 uint64 `css:".uint64"`
}
//language=html
html := `<body>
<p class="bool">true</p>
<p class="byte">1</p>
<p class="float32">5.5</p>
<p class="float64">4.566666</p>
<p class="int">4</p>
<p class="int8">127</p>
<p class="int16">32767</p>
<p class="int32">2147483647</p>
<p class="int64">9223372036854775807</p>
<p class="string">Some aweasome string</p>
<p class="uint">4294967295</p>
<p class="uint8">255</p>
<p class="uint16">65535</p>
<p class="uint32">4294967295</p>
<p class="uint64">18446744073709551615</p>
</body>`
var s allTypesStruct
err := NewDecoder(strings.NewReader(html)).Decode(&s)
assert.NoError(t, err)
assert.Equal(t, true, s.Bool)
assert.Equal(t, byte(1), s.Byte)
assert.Equal(t, float32(5.5), s.Float32)
assert.Equal(t, float64(4.566666), s.Float64)
assert.Equal(t, int(4), s.Int)
assert.Equal(t, int8(127), s.Int8)
assert.Equal(t, int16(32767), s.Int16)
assert.Equal(t, int32(2147483647), s.Int32)
assert.Equal(t, int64(9223372036854775807), s.Int64)
assert.Equal(t, "Some aweasome string", s.String)
assert.Equal(t, uint(4294967295), s.UInt)
assert.Equal(t, uint8(255), s.UInt8)
assert.Equal(t, uint16(65535), s.UInt16)
assert.Equal(t, uint32(4294967295), s.UInt32)
assert.Equal(t, uint64(18446744073709551615), s.UInt64)
}
func TestDefaultValues(t *testing.T) {
type allTypesStruct struct {
Bool bool `css:".bool" default:"true"`
Byte byte `css:".byte" default:"1"`
Float32 float32 `css:".float32" default:"5.5"`
Float64 float64 `css:".float64" default:"4.566666"`
Int int `css:".int" default:"4"`
Int8 int8 `css:".int8" default:"127"`
Int16 int16 `css:".int16" default:"32767"`
Int32 int32 `css:".int32" default:"2147483647"`
Int64 int64 `css:".int64" default:"9223372036854775807"`
String string `css:".string" default:"Some aweasome string"`
UInt uint `css:".uint" default:"4294967295"`
UInt8 uint8 `css:".uint8" default:"255"`
UInt16 uint16 `css:".uint16" default:"65535"`
UInt32 uint32 `css:".uint32" default:"4294967295"`
UInt64 uint64 `css:".uint64" default:"18446744073709551615"`
}
//language=html
html := `<body></body>`
var s allTypesStruct
err := NewDecoder(strings.NewReader(html)).Decode(&s)
assert.NoError(t, err)
assert.Equal(t, true, s.Bool)
assert.Equal(t, byte(1), s.Byte)
assert.Equal(t, float32(5.5), s.Float32)
assert.Equal(t, float64(4.566666), s.Float64)
assert.Equal(t, int(4), s.Int)
assert.Equal(t, int8(127), s.Int8)
assert.Equal(t, int16(32767), s.Int16)
assert.Equal(t, int32(2147483647), s.Int32)
assert.Equal(t, int64(9223372036854775807), s.Int64)
assert.Equal(t, "Some aweasome string", s.String)
assert.Equal(t, uint(4294967295), s.UInt)
assert.Equal(t, uint8(255), s.UInt8)
assert.Equal(t, uint16(65535), s.UInt16)
assert.Equal(t, uint32(4294967295), s.UInt32)
assert.Equal(t, uint64(18446744073709551615), s.UInt64)
}
func TestDefaultValuesForChildStructWhereParentIsMissing(t *testing.T) {
type Case struct {
Foo string `css:".foo" default:"Hello"`
Bar struct {
Baz string `css:".baz" default:"world"`
} `css:".bar"`
}
//language=html
html := `<body></body>`
var c Case
err := Unmarshal([]byte(html), &c)
assert.NoError(t, err)
assert.Equal(t, "Hello", c.Foo)
assert.Equal(t, "world", c.Bar.Baz)
}
func TestDefaultValueWhenParsingFails(t *testing.T) {
type Case struct {
Int int `css:".int" default:"42"`
Uint uint `css:".uint" default:"42"`
Float float64 `css:".float" default:"42.5"`
Bool bool `css:".bool" default:"true"`
}
//language=html
html := `<body>
<p class="int">something</p>
<p class="uint">something</p>
<p class="float">something</p>
<p class="bool">something</p>
</body>`
var c Case
err := Unmarshal([]byte(html), &c)
assert.NoError(t, err)
assert.Equal(t, 42, c.Int)
assert.Equal(t, uint(42), c.Uint)
assert.Equal(t, 42.5, c.Float)
assert.Equal(t, true, c.Bool)
}
func TestDefaultValueConversionFailing(t *testing.T) {
type Case struct {
Int int `css:".int" default:"something"`
Uint uint `css:".uint" default:"something"`
Float float64 `css:".float" default:"something"`
Bool bool `css:".bool" default:"something"`
}
//language=html
html := `<body>
<p class="int">something</p>
<p class="uint">something</p>
<p class="float">something</p>
<p class="bool">something</p>
</body>`
var c Case
err := Unmarshal([]byte(html), &c)
assert.Error(t, err)
assert.Zero(t, c.Int)
assert.Zero(t, c.Uint)
assert.Zero(t, c.Float)
assert.Zero(t, c.Bool)
}
func TestInvalidCSSSelector(t *testing.T) {
type TestStruct struct {
Foo string `css:"...foo"`
}
//language=html
html := `<body><p class="foo">Foo</p></body>`
var f TestStruct
err := Unmarshal([]byte(html), &f)
assert.Error(t, err)
assert.Equal(t, "", f.Foo)
}
func TestErrorShouldHappenWhenExtractAttrButNoAttribute(t *testing.T) {
type TestStruct struct {
Foo string `css:".foo" extract:"attr"`
}
//language=html
html := `<body><p class="foo" data-stuffs="Bar">Foo</p></body>`
var f TestStruct
err := Unmarshal([]byte(html), &f)
assert.Error(t, err)
assert.Equal(t, "", f.Foo)
}
func TestFailIfVArgumentWasNotPointer(t *testing.T) {
type Case struct {
Foo string
}
var c Case
err := Unmarshal([]byte("<body></body>"), c)
assert.Error(t, err)
}
func TestFieldWithoutSelectorShouldBeSkipped(t *testing.T) {
type Case struct {
Foo string
}
//language=html
html := `<body><p class="foo">Foo</p></body>`
var c Case
err := Unmarshal([]byte(html), &c)
assert.NoError(t, err)
}
func TestUnknownExtractFormatShouldFail(t *testing.T) {
type Case struct {
Foo string `css:".foo" extract:"bar"`
}
//language=html
html := `<body><p class="foo">Foo</p></body>`
var c Case
err := Unmarshal([]byte(html), &c)
assert.Error(t, err)
assert.Equal(t, "", c.Foo)
}