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// Copyright 2021 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package assets
import (
"embed"
"io"
"strings"
"testing"
"github.com/stretchr/testify/require"
)
//go:embed testdata
var EmbedFS embed.FS
var testFS = New(EmbedFS)
func TestFS(t *testing.T) {
cases := []struct {
name string
path string
expectedSize int64
expectedContent string
}{
{
name: "uncompressed file",
path: "testdata/uncompressed",
expectedSize: 4,
expectedContent: "foo\n",
},
{
name: "compressed file",
path: "testdata/compressed",
expectedSize: 4,
expectedContent: "foo\n",
},
{
name: "both, open uncompressed",
path: "testdata/both",
expectedSize: 4,
expectedContent: "foo\n",
},
{
name: "both, open compressed",
path: "testdata/both.gz",
expectedSize: 29,
// we don't check content for a explicitly compressed file
expectedContent: "",
},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
f, err := testFS.Open(c.path)
require.NoError(t, err)
stat, err := f.Stat()
require.NoError(t, err)
size := stat.Size()
require.Equalf(t, c.expectedSize, size, "size is wrong, expected %d, got %d", c.expectedSize, size)
if strings.HasSuffix(c.path, ".gz") {
// don't read the comressed content
return
}
content, err := io.ReadAll(f)
require.NoError(t, err)
require.Equalf(t, c.expectedContent, string(content), "content is wrong, expected %s, got %s", c.expectedContent, string(content))
})
}
}
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