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gledki_test.go
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gledki_test.go
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package gledki
import (
"bytes"
"fmt"
"io"
"io/fs"
"os"
"path/filepath"
"strings"
"testing"
"github.com/labstack/gommon/log"
)
var includePaths = []string{"./testdata/tpls", "./testdata/tpls/theme"}
var filesExt = ".htm"
var logger *log.Logger
var tagsPair = [2]string{"${", "}"}
var out strings.Builder
// remove all compiled previously templates
func init() {
sfx := filesExt + CompiledSuffix
for _, dir := range includePaths {
filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error {
if strings.HasSuffix(path, sfx) {
os.Remove(path)
}
return err
})
}
var lgbuf = bytes.NewBuffer([]byte(""))
logger = log.New("gledki")
logger.SetOutput(lgbuf)
logger.SetLevel(log.DEBUG)
logger.SetHeader(defaultLogHeader)
}
func TestNew(t *testing.T) {
// load templates
tpls, err := New(includePaths, filesExt, tagsPair, true)
if err != nil {
t.Fatal("Error New: ", err.Error())
} else {
tpls.Logger = logger
t.Logf("\ngledki.New loads all files in %s", includePaths)
for k := range tpls.files {
_ = k
// t.Logf("file: %s", k)
}
}
// do not load templates
tpls, err = New(includePaths, filesExt, tagsPair, false)
tpls.Logger = logger
if err != nil {
t.Fatal("Eror New: ", err.Error())
}
if len(tpls.files) > 0 {
t.Fatal("templates should not be loaded")
}
//Try to load nonreadable templates
os.Chmod(includePaths[0]+"/../tpls_bad/_noread.htm", 0300)
_, err = New([]string{includePaths[0] + "/../tpls_bad"}, filesExt, tagsPair, true)
if err != nil {
t.Logf("Expected error from New: %s", err.Error())
os.Chmod(includePaths[0]+"/../tpls_bad/_noread.htm", 0400)
} else {
t.Fatal("Reading nonreadable file should have failed!")
}
}
var data = Stash{
"title": "Здрасти",
"body": "<p>Едно тяло тук</p>",
"lang": "bg",
"generator": "Образци",
"included": "вложена",
}
func TestExecute(t *testing.T) {
tpls, _ := New(includePaths, filesExt, tagsPair, false)
tpls.Logger = logger
tpls.Stash = data
var out strings.Builder
_, _ = tpls.Execute(&out, "view")
outstr := out.String()
t.Log(outstr)
for k, v := range data {
if !strings.Contains(outstr, v.(string)) {
t.Fatalf("output does not contain expected value for '%s': %s", k, v)
}
}
//Change keys and check if they ar changed in the output
// Same view with other data
t.Log("=================")
tpls.Stash = Stash{
"title": "Hello",
"body": "<p>A body here</p>",
"lang": "en",
"generator": "Gledki",
"included": "included",
}
out.Reset()
_, _ = tpls.Execute(&out, "view")
outstr = out.String()
t.Log(outstr)
for k, v := range tpls.Stash {
if !strings.Contains(outstr, v.(string)) {
t.Fatalf("output does not contain expected value for '%s': %s", k, v)
}
}
// Delete from t.compiled to load it from disk so this corner is covered too.
delete(tpls.compiled, tpls.toFullPath("view"))
out.Reset()
_, _ = tpls.Execute(&out, "view")
outstr = out.String()
t.Log(outstr)
for k, v := range tpls.Stash {
if !strings.Contains(outstr, v.(string)) {
t.Fatalf("output does not contain expected value for '%s': %s", k, v)
}
}
}
func otherBooks(tpls *Gledki) TagFunc {
return TagFunc(func(w io.Writer, tag string) (int, error) {
// for more complex file, containing wrapper and include directives, you
// must use tpls.Compile("path/to/file")
template := tpls.MustLoadFile("partials/_book_item")
booksBB := bytes.NewBuffer([]byte(""))
booksFromDataBase := []map[string]any{
{"book_title": "Лечителката и рунтавата ѝ… котка", "book_author": "Контадин Кременски"},
{"book_title": "На пост", "book_author": "Николай Фенерски"},
}
for _, book := range booksFromDataBase {
if _, err := tpls.FtExecStd(template, booksBB, book); err != nil {
return 0, fmt.Errorf("Problem rendering partial template `_book_item` in 'other_books' TagFunc: %s", err.Error())
}
}
return w.Write(booksBB.Bytes())
})
}
func TestAddExecuteFunc(t *testing.T) {
tpls, _ := New(includePaths, filesExt, tagsPair, false)
tpls.Logger = logger
tpls.Stash = Stash{
"a": "a value",
"b": "b value",
}
// ...
// Later in a galaxy far away
// ....
// Prepare a book for display and prepare a list of other books
tpls.MergeStash(map[string]any{
"lang": "en",
"generator": "Gledki",
"included": "вложена",
"book_title": "Историософия", "book_author": "Николай Гочев",
"book_isbn": "9786199169056", "book_issuer": "Студио Беров",
})
tpls.Stash["title"] = tpls.Stash["book_title"]
// Prepare a function for rendering other books.
// Its result should replace "other_books".
tpls.Stash["other_books"] = otherBooks(tpls)
var out strings.Builder
// Even later, when the whole page is put together
_, err := tpls.Execute(&out, "book")
if err != nil {
t.Fatalf("Error executing Gledki.Execute: %s", err.Error())
}
if strings.Contains(out.String(), `<div class="book">`) {
t.Log("Expected content")
} else {
t.Fatalf("Expected content was not found:\n%s", out.String())
}
}
// We put the second path as first, so files in it will be found first, if they
// exist. The test is successful if the "black" theme files are used.
func TestAddExecuteFuncWithTheme(t *testing.T) {
roots := []string{includePaths[1], includePaths[0]}
tpls, _ := New(roots, filesExt, tagsPair, false)
tpls.Logger = logger
tpls.Stash = Stash{
"a": "стойност за а",
"b": "стойност за Б",
}
// Prepare a book for display and prepare a list of other books
tpls.MergeStash(map[string]any{
"lang": "bg",
"generator": "Гледки",
"included": "вложена",
"book_title": "Историософия", "book_author": "Николай Гочев",
"book_isbn": "9786199169056", "book_issuer": "Студио Беров",
})
tpls.Stash["title"] = tpls.Stash["book_title"]
// Prepare a function for rendering other books.
// Its result should replace "other_books".
tpls.Stash["other_books"] = otherBooks(tpls)
var out strings.Builder
// Even later, when the whole page is put together
_, err := tpls.Execute(&out, "book")
if err != nil {
t.Fatalf("Error executing Gledki.Execute: %s", err.Error())
}
outStr := out.String()
if strings.Contains(outStr, `<div class="black book">`) {
t.Log("Expected 'black' class")
} else {
t.Fatalf("Expected class 'black' was not found:\n%s", outStr)
}
if strings.Contains(outStr, `<title>black`) {
t.Log("Expected 'black' title")
} else {
t.Fatalf("Expected 'black' title was not found:\n%s", outStr)
}
// t.Log(outStr)
}
func TestIncludeLimitPanic(t *testing.T) {
tpls, _ := New(includePaths, filesExt, tagsPair, false)
tpls.Stash = Stash{
"title": "Possibly recursive inclusions",
"generator": "Gledki",
"included": "included",
}
level := 0
tpls.Stash["level"] = TagFunc(func(w io.Writer, tag string) (int, error) {
level++
return w.Write([]byte(spf("%d", level)))
})
var out strings.Builder
expectPanic(t, func() { _, _ = tpls.Execute(&out, "includes.htm") })
}
func TestOtherPanics(t *testing.T) {
tpls, _ := New(includePaths, filesExt, tagsPair, false)
path := "/ff/a.htm"
tpls.compiled[path] = "bla"
tpls.wg.Add(1)
expectPanic(t, func() { tpls.storeCompiled(path, tpls.compiled[path]) })
expectPanic(t, func() { tpls.MustLoadFile(path) })
expectPanic(t, func() { Must([]string{"/aaa/bbb"}, filesExt, tagsPair, false) })
}
func TestIncludeLimitNoPanic(t *testing.T) {
tpls, _ := New(includePaths, filesExt, tagsPair, false)
tpls.Stash = Stash{
"title": "Possibly recursive inclusions",
"generator": "Gledki",
"included": "included",
}
level := 0
tpls.Stash["level"] = TagFunc(func(w io.Writer, tag string) (int, error) {
level++
return w.Write([]byte(spf("%d", level)))
})
tpls.IncludeLimit = 7
level = 0
out.Reset()
_, err := tpls.Execute(&out, "includes")
if err != nil {
t.Fatalf("Error executing Gledki.Execute: %s", err.Error())
}
outstr := out.String()
t.Log(outstr)
if !strings.Contains(outstr, "4 4") {
t.Fatalf("output does not contain expected value 4 4")
}
}
func TestFtExecString(t *testing.T) {
tpls, _ := New(includePaths, filesExt, tagsPair, false)
partial := `<div class="pager">${prev}${next}</div>`
out := tpls.FtExecString(partial, Stash{`prev`: `previous`})
if strings.Contains(out, "next") {
t.Fatal("String should not contain unused placeholder 'next'!")
}
}
func TestErrors(t *testing.T) {
if _, err := New([]string{"/ala/bala/nica"}, filesExt, tagsPair, false); err != nil {
errstr := err.Error()
if strings.Contains(errstr, "does not exist") {
t.Logf("Right error: %s", err.Error())
} else {
t.Fatalf("Wrong error: errstr")
}
} else {
t.Fatal("No error - this is unexpected!")
}
tpls, _ := New([]string{includePaths[0] + "/../tpls_bad"}, filesExt, tagsPair, false)
tpls.Logger = logger
out.Reset()
if _, err := tpls.Execute(&out, "no_wrapper"); err != nil {
errstr := err.Error()
if strings.Contains(errstr, "could not be read") {
t.Logf("Right error: %s", err.Error())
} else {
t.Fatalf("Wrong error: errstr")
}
} else {
t.Fatal("No error - this is unexpected!")
}
out.Reset()
if _, err := tpls.Execute(&out, "nosuchfile"); err != nil {
errstr := err.Error()
if strings.Contains(errstr, "could not be read") {
t.Logf("Right error: %s", err.Error())
} else {
t.Fatalf("Wrong error: errstr")
}
} else {
t.Fatal("No error - this is unexpected!")
}
out.Reset()
if _, err := tpls.Execute(&out, "no_include"); err != nil {
errstr := err.Error()
if strings.Contains(errstr, "could not be read") {
t.Logf("Right error: %s", err.Error())
} else {
t.Fatalf("Wrong error:%s", errstr)
}
} else {
t.Fatalf("No error - this is unexpected! Output: %s", out.String())
}
out.Reset()
if _, err := tpls.Execute(&out, "incl_no_wrapper.htm"); err != nil {
errstr := err.Error()
if strings.Contains(errstr, "could not be read") {
t.Logf("Right error: %s", err.Error())
} else {
t.Fatalf("Wrong error:%s", errstr)
}
} else {
t.Fatalf("No error - this is unexpected! Output: %s", out.String())
}
out.Reset()
if _, err := tpls.Execute(&out, "incl_no_include.htm"); err != nil {
errstr := err.Error()
if strings.Contains(errstr, "could not be read") {
t.Logf("Right error: %s", err.Error())
} else {
t.Fatalf("Wrong error:%s", errstr)
}
} else {
t.Fatalf("No error - this is unexpected! Output: %s", out.String())
}
absRoot, err := filepath.Abs(includePaths[0])
if err != nil {
t.Fatalf("Error finding absolute path: %s", err.Error())
}
_ = tpls.findRoots([]string{absRoot})
if tpls.Roots[0] == absRoot {
t.Logf("Right root: %s", tpls.Roots)
} else {
t.Logf("Wrong root: Got: %s\n Expected: %s", tpls.Roots[0], absRoot)
}
if err = tpls.findRoots([]string{"../ala/bala"}); err != nil {
errstr := err.Error()
if strings.Contains(errstr, "does not exist!") {
t.Logf("Right error: %s", err.Error())
} else {
t.Fatalf("Wrong error:%s", errstr)
}
}
}
func expectPanic(t *testing.T, f func()) {
defer func() {
if r := recover(); r == nil {
t.Fatalf("MISSING PANIC")
} else {
t.Log(r)
}
}()
f()
}