package builder

 
 import (
 	"bytes"
 	"io/ioutil"
 	"testing"
 )
 
 var textPlainDockerfile = "FROM busybox"
 var binaryContext = []byte{0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00} //xz magic
 

 func TestSelectAcceptableMIME(t *testing.T) {
 	validMimeStrings := []string{
 		"application/x-bzip2",
 		"application/bzip2",
 		"application/gzip",
 		"application/x-gzip",
 		"application/x-xz",
 		"application/xz",
 		"application/tar",
 		"application/x-tar",
 		"application/octet-stream",
 		"text/plain",
 	}
 
 	invalidMimeStrings := []string{
 		"",
 		"application/octet",
 		"application/json",
 	}
 
 	for _, m := range invalidMimeStrings {
 		if len(selectAcceptableMIME(m)) > 0 {

 			t.Fatalf("Should not have accepted %q", m)

 		}
 	}
 
 	for _, m := range validMimeStrings {
 		if str := selectAcceptableMIME(m); str == "" {

 			t.Fatalf("Should have accepted %q", m)

 		}
 	}
 }
 

 func TestInspectEmptyResponse(t *testing.T) {
 	ct := "application/octet-stream"
 	br := ioutil.NopCloser(bytes.NewReader([]byte("")))
 	contentType, bReader, err := inspectResponse(ct, br, 0)
 	if err == nil {
 		t.Fatalf("Should have generated an error for an empty response")
 	}
 	if contentType != "application/octet-stream" {
 		t.Fatalf("Content type should be 'application/octet-stream' but is %q", contentType)
 	}
 	body, err := ioutil.ReadAll(bReader)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if len(body) != 0 {
 		t.Fatal("response body should remain empty")
 	}
 }
 
 func TestInspectResponseBinary(t *testing.T) {
 	ct := "application/octet-stream"
 	br := ioutil.NopCloser(bytes.NewReader(binaryContext))

 	contentType, bReader, err := inspectResponse(ct, br, int64(len(binaryContext)))

 	if err != nil {
 		t.Fatal(err)
 	}
 	if contentType != "application/octet-stream" {
 		t.Fatalf("Content type should be 'application/octet-stream' but is %q", contentType)
 	}
 	body, err := ioutil.ReadAll(bReader)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if len(body) != len(binaryContext) {
 		t.Fatalf("Wrong response size %d, should be == len(binaryContext)", len(body))
 	}
 	for i := range body {
 		if body[i] != binaryContext[i] {
 			t.Fatalf("Corrupted response body at byte index %d", i)
 		}
 	}
 }
 
 func TestResponseUnsupportedContentType(t *testing.T) {
 	content := []byte(textPlainDockerfile)
 	ct := "application/json"
 	br := ioutil.NopCloser(bytes.NewReader(content))

 	contentType, bReader, err := inspectResponse(ct, br, int64(len(textPlainDockerfile)))

 
 	if err == nil {
 		t.Fatal("Should have returned an error on content-type 'application/json'")
 	}
 	if contentType != ct {
 		t.Fatalf("Should not have altered content-type: orig: %s, altered: %s", ct, contentType)
 	}
 	body, err := ioutil.ReadAll(bReader)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if string(body) != textPlainDockerfile {
 		t.Fatalf("Corrupted response body %s", body)
 	}
 }
 
 func TestInspectResponseTextSimple(t *testing.T) {
 	content := []byte(textPlainDockerfile)
 	ct := "text/plain"
 	br := ioutil.NopCloser(bytes.NewReader(content))

 	contentType, bReader, err := inspectResponse(ct, br, int64(len(content)))

 	if err != nil {
 		t.Fatal(err)
 	}
 	if contentType != "text/plain" {
 		t.Fatalf("Content type should be 'text/plain' but is %q", contentType)
 	}
 	body, err := ioutil.ReadAll(bReader)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if string(body) != textPlainDockerfile {
 		t.Fatalf("Corrupted response body %s", body)
 	}
 }
 
 func TestInspectResponseEmptyContentType(t *testing.T) {
 	content := []byte(textPlainDockerfile)
 	br := ioutil.NopCloser(bytes.NewReader(content))

 	contentType, bodyReader, err := inspectResponse("", br, int64(len(content)))

 	if err != nil {
 		t.Fatal(err)
 	}
 	if contentType != "text/plain" {
 		t.Fatalf("Content type should be 'text/plain' but is %q", contentType)
 	}
 	body, err := ioutil.ReadAll(bodyReader)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if string(body) != textPlainDockerfile {
 		t.Fatalf("Corrupted response body %s", body)
 	}
 }