Creating parent collection method was added (#22)

* method for creating parent collection was added to Client struct

"func (c *Client) createParentCollection(itemPath string) error" was added to request.go file

* using Client's method to create parent collection

in following methods:
Client.Write()
Client.WriteStream()
Client.copymove()

deadlock is impossible in method Client.copymove() because of paragraph #6 section 9.8.5 (https://tools.ietf.org/html/rfc4918#section-9.8.5) and paragraph #6 section 9.9.4 (https://tools.ietf.org/html/rfc4918#section-9.9.4) of RFC 4918 (https://tools.ietf.org/html/rfc4918)

* install dependencies script was added to Travis-CI file

* testing was added to Travis-CI file

* error wrapping was removed from Client.put() method

* using an early return on error in case of 409 in Client.Write() method

.travis.yml

@@ -2,3 +2,9 @@ language: go
 
 go:
   - "1.x"
+
+install:
+  - go get ./...
+
+script:
+  - go test -v --short ./...

client.go

@@ -346,23 +346,30 @@ func (c *Client) Write(path string, data []byte, _ os.FileMode) error {
 		return nil
 
 	case 409:
-		if i := strings.LastIndex(path, "/"); i > -1 {
-			if err := c.MkdirAll(path[0:i+1], 0755); err == nil {
+		err := c.createParentCollection(path)
+		if err != nil {
+			return err
+		}
+
 		s = c.put(path, bytes.NewReader(data))
 		if s == 200 || s == 201 || s == 204 {
 			return nil
 		}
 	}
-		}
-	}
 
 	return newPathError("Write", path, s)
 }
 
 // WriteStream writes a stream
 func (c *Client) WriteStream(path string, stream io.Reader, _ os.FileMode) error {
-	// TODO check if parent collection exists
+
+	err := c.createParentCollection(path)
+	if err != nil {
+		return err
+	}
+
 	s := c.put(path, stream)
+
 	switch s {
 	case 200, 201, 204:
 		return nil

requests.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"net/http"
 	"strings"
+	"path"
 )
 
 func (c *Client) req(method, path string, body io.Reader, intercept func(*http.Request)) (req *http.Response, err error) {
@@ -133,7 +134,12 @@ func (c *Client) copymove(method string, oldpath string, newpath string, overwri
 		log(fmt.Sprintf(" TODO handle %s - %s multistatus result %s", method, oldpath, String(data)))
 
 	case 409:
-		// TODO create dst path
+		err := c.createParentCollection(newpath)
+		if err != nil {
+			return err
+		}
+
+		return c.copymove(method, oldpath, newpath, overwrite)
 	}
 
 	return newPathError(method, oldpath, s)
@@ -148,3 +154,8 @@ func (c *Client) put(path string, stream io.Reader) int {
 
 	return rs.StatusCode
 }
+
+func (c *Client) createParentCollection(itemPath string) (err error) {
+	parentPath := path.Dir(itemPath)
+	return c.MkdirAll(parentPath, 0755)
+}