1 files changed, 80 insertions, 0 deletions
diff --git a/workhorse/internal/lsif_transformer/parser/parser_test.go b/workhorse/internal/lsif_transformer/parser/parser_test.go
new file mode 100644
index 00000000000..3a4d72360e2
--- /dev/null
+++ b/workhorse/internal/lsif_transformer/parser/parser_test.go
@@ -0,0 +1,80 @@
+package parser
+
+import (
+	"archive/zip"
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGenerate(t *testing.T) {
+	filePath := "testdata/dump.lsif.zip"
+	tmpDir := filePath + ".tmp"
+	defer os.RemoveAll(tmpDir)
+
+	createFiles(t, filePath, tmpDir)
+
+	verifyCorrectnessOf(t, tmpDir, "lsif/main.go.json")
+	verifyCorrectnessOf(t, tmpDir, "lsif/morestrings/reverse.go.json")
+}
+
+func verifyCorrectnessOf(t *testing.T, tmpDir, fileName string) {
+	file, err := ioutil.ReadFile(filepath.Join(tmpDir, fileName))
+	require.NoError(t, err)
+
+	var buf bytes.Buffer
+	require.NoError(t, json.Indent(&buf, file, "", "    "))
+
+	expected, err := ioutil.ReadFile(filepath.Join("testdata/expected/", fileName))
+	require.NoError(t, err)
+
+	require.Equal(t, string(expected), buf.String())
+}
+
+func createFiles(t *testing.T, filePath, tmpDir string) {
+	t.Helper()
+	file, err := os.Open(filePath)
+	require.NoError(t, err)
+
+	parser, err := NewParser(context.Background(), file, Config{})
+	require.NoError(t, err)
+
+	zipFileName := tmpDir + ".zip"
+	w, err := os.Create(zipFileName)
+	require.NoError(t, err)
+	defer os.RemoveAll(zipFileName)
+
+	_, err = io.Copy(w, parser)
+	require.NoError(t, err)
+	require.NoError(t, parser.Close())
+
+	extractZipFiles(t, tmpDir, zipFileName)
+}
+
+func extractZipFiles(t *testing.T, tmpDir, zipFileName string) {
+	zipReader, err := zip.OpenReader(zipFileName)
+	require.NoError(t, err)
+
+	for _, file := range zipReader.Reader.File {
+		zippedFile, err := file.Open()
+		require.NoError(t, err)
+		defer zippedFile.Close()
+
+		fileDir, fileName := filepath.Split(file.Name)
+		require.NoError(t, os.MkdirAll(filepath.Join(tmpDir, fileDir), os.ModePerm))
+
+		outputFile, err := os.Create(filepath.Join(tmpDir, fileDir, fileName))
+		require.NoError(t, err)
+		defer outputFile.Close()
+
+		_, err = io.Copy(outputFile, zippedFile)
+		require.NoError(t, err)
+	}
+}