Add integration tests (#86)

close #82
close #32

make sure we dont get regressions again ... as we currently have in **main**

followups:
 - create a DNS subdomayn specific to redirect to mock url ...

Co-authored-by: 6543 <6543@obermui.de>
Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/86
Reviewed-by: crapStone <crapstone@noreply.codeberg.org>

integration/get_test.go

@@ -0,0 +1,69 @@
+//go:build integration
+// +build integration
+
+package integration
+
+import (
+	"bytes"
+	"crypto/tls"
+	"io"
+	"net/http"
+	"net/http/cookiejar"
+	"testing"
+
+	"github.com/rs/zerolog/log"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetRedirect(t *testing.T) {
+	log.Printf("== TestGetRedirect ==\n")
+	// test custom domain redirect
+	resp, err := getTestHTTPSClient().Get("https://calciumdibromid.localhost.mock.directory:4430")
+	assert.NoError(t, err)
+	if !assert.EqualValues(t, http.StatusTemporaryRedirect, resp.StatusCode) {
+		t.FailNow()
+	}
+	assert.EqualValues(t, "https://www.cabr2.de/", resp.Header["Location"][0])
+	assert.EqualValues(t, 0, getSize(resp.Body))
+}
+
+func TestGetContent(t *testing.T) {
+	log.Printf("== TestGetContent ==\n")
+	// test get image
+	resp, err := getTestHTTPSClient().Get("https://magiclike.localhost.mock.directory:4430/images/827679288a.jpg")
+	assert.NoError(t, err)
+	if !assert.EqualValues(t, http.StatusOK, resp.StatusCode) {
+		t.FailNow()
+	}
+	assert.EqualValues(t, "image/jpeg", resp.Header["Content-Type"][0])
+	assert.EqualValues(t, "124635", resp.Header["Content-Length"][0])
+	assert.EqualValues(t, 124635, getSize(resp.Body))
+
+	// specify branch
+	resp, err = getTestHTTPSClient().Get("https://momar.localhost.mock.directory:4430/pag/@master/")
+	assert.NoError(t, err)
+	if !assert.EqualValues(t, http.StatusOK, resp.StatusCode) {
+		t.FailNow()
+	}
+	assert.EqualValues(t, "text/html; charset=utf-8", resp.Header["Content-Type"][0])
+	assert.True(t, getSize(resp.Body) > 1000)
+}
+
+func getTestHTTPSClient() *http.Client {
+	cookieJar, _ := cookiejar.New(nil)
+	return &http.Client{
+		Jar: cookieJar,
+		CheckRedirect: func(_ *http.Request, _ []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+		},
+	}
+}
+
+func getSize(stream io.Reader) int {
+	buf := new(bytes.Buffer)
+	_, _ = buf.ReadFrom(stream)
+	return buf.Len()
+}