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package lexers_test
import (
"encoding/json"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"strings"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/alecthomas/chroma"
"github.com/alecthomas/chroma/formatters"
"github.com/alecthomas/chroma/lexers"
"github.com/alecthomas/chroma/lexers/a"
"github.com/alecthomas/chroma/lexers/x"
"github.com/alecthomas/chroma/styles"
)
func TestCompileAllRegexes(t *testing.T) {
for _, lexer := range lexers.Registry.Lexers {
it, err := lexer.Tokenise(nil, "")
assert.NoError(t, err, "%s failed", lexer.Config().Name)
err = formatters.NoOp.Format(ioutil.Discard, styles.SwapOff, it)
assert.NoError(t, err, "%s failed", lexer.Config().Name)
}
}
func TestGet(t *testing.T) {
t.Run("ByName", func(t *testing.T) {
assert.Equal(t, lexers.Get("xml"), x.XML)
})
t.Run("ByAlias", func(t *testing.T) {
assert.Equal(t, lexers.Get("as"), a.Actionscript)
})
t.Run("ViaFilename", func(t *testing.T) {
assert.Equal(t, lexers.Get("svg"), x.XML)
})
}
func TestGlobs(t *testing.T) {
filename := "main.go"
for _, lexer := range lexers.Registry.Lexers {
config := lexer.Config()
for _, glob := range config.Filenames {
_, err := filepath.Match(glob, filename)
require.NoError(t, err)
}
for _, glob := range config.AliasFilenames {
_, err := filepath.Match(glob, filename)
require.NoError(t, err)
}
}
}
func BenchmarkGet(b *testing.B) {
for i := 0; i < b.N; i++ {
lexers.Get("go")
}
}
func FileTest(t *testing.T, lexer chroma.Lexer, actualFilename, expectedFilename string) {
t.Helper()
t.Run(lexer.Config().Name+"/"+actualFilename, func(t *testing.T) {
// Read and tokenise source text.
actualText, err := ioutil.ReadFile(actualFilename)
assert.NoError(t, err)
actual, err := chroma.Tokenise(lexer, nil, string(actualText))
assert.NoError(t, err)
if os.Getenv("RECORD") == "true" {
// Update the expected file with the generated output of this lexer
f, err := os.Create(expectedFilename)
defer f.Close() // nolint: gosec
assert.NoError(t, err)
assert.NoError(t, formatters.JSON.Format(f, nil, chroma.Literator(actual...)))
} else {
// Read expected JSON into token slice.
var expected []chroma.Token
r, err := os.Open(expectedFilename)
assert.NoError(t, err)
err = json.NewDecoder(r).Decode(&expected)
assert.NoError(t, err)
// Equal?
assert.Equal(t, expected, actual)
}
})
}
// Test source files are in the form <key>.<key> and validation data is in the form <key>.<key>.expected.
func TestLexers(t *testing.T) {
files, err := ioutil.ReadDir("testdata")
assert.NoError(t, err)
for _, file := range files {
// skip text analysis test files
if file.Name() == "analysis" {
continue
}
if file.IsDir() {
dirname := filepath.Join("testdata", file.Name())
lexer := lexers.Get(file.Name())
assert.NotNil(t, lexer)
subFiles, err := ioutil.ReadDir(dirname)
assert.NoError(t, err)
for _, subFile := range subFiles {
ext := filepath.Ext(subFile.Name())[1:]
if ext != "actual" {
continue
}
filename := filepath.Join(dirname, subFile.Name())
expectedFilename := strings.TrimSuffix(filename, filepath.Ext(filename)) + ".expected"
lexer = chroma.Coalesce(lexer)
FileTest(t, lexer, filename, expectedFilename)
}
} else {
ext := filepath.Ext(file.Name())[1:]
if ext != "actual" {
continue
}
base := strings.Split(strings.TrimSuffix(file.Name(), filepath.Ext(file.Name())), ".")[0]
lexer := lexers.Get(base)
assert.NotNil(t, lexer)
filename := filepath.Join("testdata", file.Name())
expectedFilename := strings.TrimSuffix(filename, filepath.Ext(filename)) + ".expected"
lexer = chroma.Coalesce(lexer)
FileTest(t, lexer, filename, expectedFilename)
}
}
}
func FileTestAnalysis(t *testing.T, lexer chroma.Lexer, actualFilepath, expectedFilepath string) {
t.Helper()
t.Run(lexer.Config().Name+"/"+actualFilepath, func(t *testing.T) {
expectedData, err := ioutil.ReadFile(expectedFilepath)
assert.NoError(t, err)
analyser, ok := lexer.(chroma.Analyser)
assert.True(t, ok, "lexer %q does not set analyser", lexer.Config().Name)
data, err := ioutil.ReadFile(actualFilepath)
assert.NoError(t, err)
actual := analyser.AnalyseText(string(data))
if os.Getenv("RECORD") == "true" {
// Update the expected file with the generated output of this lexer
f, err := os.Create(expectedFilepath)
defer f.Close() // nolint: gosec
assert.NoError(t, err)
_, err = f.WriteString(strconv.FormatFloat(float64(actual), 'f', -1, 32))
assert.NoError(t, err)
} else {
expected, err := strconv.ParseFloat(strings.TrimSpace(string(expectedData)), 32)
assert.NoError(t, err)
assert.Equal(t, float32(expected), actual)
}
})
}
func TestLexersTextAnalyser(t *testing.T) {
files, err := filepath.Glob("testdata/analysis/*.actual")
assert.NoError(t, err)
for _, actualFilepath := range files {
filename := filepath.Base(actualFilepath)
baseFilename := strings.TrimSuffix(filename, filepath.Ext(filename))
lexerName := strings.Split(baseFilename, ".")[0]
lexer := lexers.Get(lexerName)
assert.NotNil(t, lexer, "no lexer found for name %q", lexerName)
expectedFilepath := "testdata/analysis/" + baseFilename + ".expected"
FileTestAnalysis(t, lexer, actualFilepath, expectedFilepath)
}
}
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