feat(metadata): add tests

README.md

@@ -43,11 +43,13 @@ The [install script](https://github.com/lovell/sharp/blob/master/preinstall.sh)
 
 ## API
 
+### Example
+
 ```go
 import (
   "fmt"
   "os"
-  "gopkg.in/h2non/bimg"
+  "gopkg.in/h2non/bimg.v0"
 )
 
 options := bimg.Options{
@@ -63,6 +65,274 @@ if err != nil {
 }
 ```
 
+#### func  DetermineImageTypeName
+
+```go
+func DetermineImageTypeName(buf []byte) string
+```
+
+#### func  IsTypeNameSupported
+
+```go
+func IsTypeNameSupported(t string) bool
+```
+
+#### func  IsTypeSupported
+
+```go
+func IsTypeSupported(t ImageType) bool
+```
+
+#### func  Read
+
+```go
+func Read(path string) ([]byte, error)
+```
+
+#### func  Resize
+
+```go
+func Resize(buf []byte, o Options) ([]byte, error)
+```
+
+#### type Angle
+
+```go
+type Angle int
+```
+
+
+```go
+const (
+  D0   Angle = C.VIPS_ANGLE_D0
+  D90  Angle = C.VIPS_ANGLE_D90
+  D180 Angle = C.VIPS_ANGLE_D180
+  D270 Angle = C.VIPS_ANGLE_D270
+)
+```
+
+#### type Direction
+
+```go
+type Direction int
+```
+
+
+```go
+const (
+  HORIZONTAL Direction = C.VIPS_DIRECTION_HORIZONTAL
+  VERTICAL   Direction = C.VIPS_DIRECTION_VERTICAL
+)
+```
+
+#### type Gravity
+
+```go
+type Gravity int
+```
+
+
+```go
+const (
+  CENTRE Gravity = iota
+  NORTH
+  EAST
+  SOUTH
+  WEST
+)
+```
+
+#### type Image
+
+```go
+type Image struct {
+}
+```
+
+
+#### func  NewImage
+
+```go
+func NewImage(buf []byte) *Image
+```
+
+#### func (*Image) Convert
+
+```go
+func (i *Image) Convert(t ImageType) ([]byte, error)
+```
+
+#### func (*Image) Crop
+
+```go
+func (i *Image) Crop(width int, height int) ([]byte, error)
+```
+
+#### func (*Image) Extract
+
+```go
+func (i *Image) Extract(top int, left int, width int, height int) ([]byte, error)
+```
+
+#### func (*Image) Flip
+
+```go
+func (i *Image) Flip() ([]byte, error)
+```
+
+#### func (*Image) Flop
+
+```go
+func (i *Image) Flop() ([]byte, error)
+```
+
+#### func (*Image) Metadata
+
+```go
+func (i *Image) Metadata() (ImageMetadata, error)
+```
+
+#### func (*Image) Process
+
+```go
+func (i *Image) Process(o Options) ([]byte, error)
+```
+
+#### func (*Image) Resize
+
+```go
+func (i *Image) Resize(width int, height int) ([]byte, error)
+```
+
+#### func (*Image) Rotate
+
+```go
+func (i *Image) Rotate(a Angle) ([]byte, error)
+```
+
+#### func (*Image) Size
+
+```go
+func (i *Image) Size() (ImageSize, error)
+```
+
+#### func (*Image) Type
+
+```go
+func (i *Image) Type() string
+```
+
+#### type ImageMetadata
+
+```go
+type ImageMetadata struct {
+  Orientation int
+  Alpha       bool
+  Profile     bool
+  Space       int
+  Type        string
+  Size        ImageSize
+}
+```
+
+
+#### func  Metadata
+
+```go
+func Metadata(buf []byte) (ImageMetadata, error)
+```
+
+#### type ImageSize
+
+```go
+type ImageSize struct {
+  Width  int
+  Height int
+}
+```
+
+
+#### func  Size
+
+```go
+func Size(buf []byte) (ImageSize, error)
+```
+
+#### type ImageType
+
+```go
+type ImageType int
+```
+
+
+```go
+const (
+  UNKNOWN ImageType = iota
+  JPEG
+  WEBP
+  PNG
+  TIFF
+  MAGICK
+)
+```
+
+#### func DetermineImageType
+
+```go
+func DetermineImageType(buf []byte) ImageType
+```
+
+#### type Interpolator
+
+```go
+type Interpolator int
+```
+
+
+```go
+const (
+  BICUBIC Interpolator = iota
+  BILINEAR
+  NOHALO
+)
+```
+
+#### func (Interpolator) String
+
+```go
+func (i Interpolator) String() string
+```
+
+#### type Options
+
+```go
+type Options struct {
+  Height       int
+  Width        int
+  Top          int
+  Left         int
+  Crop         bool
+  Enlarge      bool
+  Extend       int
+  Embed        bool
+  Quality      int
+  Compression  int
+  Type         ImageType
+  Rotate       Angle
+  Flip         Direction
+  Gravity      Gravity
+  Interpolator Interpolator
+}
+```
+
+
+#### type Vips
+
+```go
+type Vips struct {
+}
+```
+
 ## License
 
 MIT - Tomas Aparicio