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cogger_test.go
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cogger_test.go
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package cogger
import (
"bytes"
"crypto/md5"
"io"
"os"
"testing"
"github.com/google/tiff"
)
func testCase(t *testing.T, expected_filename string, filenames ...string) {
t.Helper()
f, err := os.Open("testdata/" + expected_filename)
if err != nil {
t.Fatal(err)
}
hasher := md5.New()
_, _ = io.Copy(hasher, f)
srchash := hasher.Sum(nil)
f.Close()
files := make([]tiff.ReadAtReadSeeker, len(filenames))
for i := range filenames {
f, err = os.Open("testdata/" + filenames[i])
if err != nil {
t.Fatal(err)
}
defer f.Close()
files[i] = f
}
buf := bytes.Buffer{}
hasher.Reset()
_ = Rewrite(&buf, files...)
_, _ = io.Copy(hasher, &buf)
coghash := hasher.Sum(nil)
if !bytes.Equal(coghash, srchash) {
t.Errorf("mismatch on %v: %x / %x", filenames, srchash, coghash)
}
}
func TestCases(t *testing.T) {
cases := []string{
"band4mask.tif",
"band4.tif",
"graymask.tif",
"gray.tif",
"rgbmask.tif",
"rgbmaskline.tif",
"rgb.tif",
}
for i := range cases {
testCase(t, "cog_"+cases[i], cases[i])
}
}
func TestMultiFiles(t *testing.T) {
testCase(t, "cog_ext_ovr.tif", "exttest.tif", "exttest.tif.ovr")
testCase(t, "cog_ext_multi.tif", "exttest.tif", "exttest.tif.2", "exttest.tif.4")
}