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|
package gitdiff
import (
"bytes"
"errors"
"io"
"io/ioutil"
"path/filepath"
"testing"
)
func TestApplyTextFragment(t *testing.T) {
tests := map[string]applyTest{
"createFile": {Files: getApplyFiles("text_fragment_new")},
"deleteFile": {Files: getApplyFiles("text_fragment_delete_all")},
"addStart": {Files: getApplyFiles("text_fragment_add_start")},
"addMiddle": {Files: getApplyFiles("text_fragment_add_middle")},
"addEnd": {Files: getApplyFiles("text_fragment_add_end")},
"addEndNoEOL": {Files: getApplyFiles("text_fragment_add_end_noeol")},
"changeStart": {Files: getApplyFiles("text_fragment_change_start")},
"changeMiddle": {Files: getApplyFiles("text_fragment_change_middle")},
"changeEnd": {Files: getApplyFiles("text_fragment_change_end")},
"changeEndEOL": {Files: getApplyFiles("text_fragment_change_end_eol")},
"changeExact": {Files: getApplyFiles("text_fragment_change_exact")},
"changeSingleNoEOL": {Files: getApplyFiles("text_fragment_change_single_noeol")},
"errorShortSrcBefore": {
Files: applyFiles{
Src: "text_fragment_error.src",
Patch: "text_fragment_error_short_src_before.patch",
},
Err: &Conflict{},
},
"errorShortSrc": {
Files: applyFiles{
Src: "text_fragment_error.src",
Patch: "text_fragment_error_short_src.patch",
},
Err: &Conflict{},
},
"errorContextConflict": {
Files: applyFiles{
Src: "text_fragment_error.src",
Patch: "text_fragment_error_context_conflict.patch",
},
Err: &Conflict{},
},
"errorDeleteConflict": {
Files: applyFiles{
Src: "text_fragment_error.src",
Patch: "text_fragment_error_delete_conflict.patch",
},
Err: &Conflict{},
},
"errorNewFile": {
Files: applyFiles{
Src: "text_fragment_error.src",
Patch: "text_fragment_error_new_file.patch",
},
Err: &Conflict{},
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
test.run(t, func(dst io.Writer, src io.ReaderAt, file *File) error {
if len(file.TextFragments) != 1 {
t.Fatalf("patch should contain exactly one fragment, but it has %d", len(file.TextFragments))
}
applier := NewTextApplier(dst, src)
return applier.ApplyFragment(file.TextFragments[0])
})
})
}
}
func TestApplyBinaryFragment(t *testing.T) {
tests := map[string]applyTest{
"literalCreate": {Files: getApplyFiles("bin_fragment_literal_create")},
"literalModify": {Files: getApplyFiles("bin_fragment_literal_modify")},
"deltaModify": {Files: getApplyFiles("bin_fragment_delta_modify")},
"deltaModifyLarge": {Files: getApplyFiles("bin_fragment_delta_modify_large")},
"errorIncompleteAdd": {
Files: applyFiles{
Src: "bin_fragment_delta_error.src",
Patch: "bin_fragment_delta_error_incomplete_add.patch",
},
Err: "incomplete add",
},
"errorIncompleteCopy": {
Files: applyFiles{
Src: "bin_fragment_delta_error.src",
Patch: "bin_fragment_delta_error_incomplete_copy.patch",
},
Err: "incomplete copy",
},
"errorSrcSize": {
Files: applyFiles{
Src: "bin_fragment_delta_error.src",
Patch: "bin_fragment_delta_error_src_size.patch",
},
Err: &Conflict{},
},
"errorDstSize": {
Files: applyFiles{
Src: "bin_fragment_delta_error.src",
Patch: "bin_fragment_delta_error_dst_size.patch",
},
Err: "insufficient or extra data",
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
test.run(t, func(dst io.Writer, src io.ReaderAt, file *File) error {
applier := NewBinaryApplier(dst, src)
return applier.ApplyFragment(file.BinaryFragment)
})
})
}
}
func TestApplyFile(t *testing.T) {
tests := map[string]applyTest{
"textModify": {
Files: applyFiles{
Src: "file_text.src",
Patch: "file_text_modify.patch",
Out: "file_text_modify.out",
},
},
"textDelete": {
Files: applyFiles{
Src: "file_text.src",
Patch: "file_text_delete.patch",
Out: "file_text_delete.out",
},
},
"textErrorPartialDelete": {
Files: applyFiles{
Src: "file_text.src",
Patch: "file_text_error_partial_delete.patch",
},
Err: &Conflict{},
},
"binaryModify": {
Files: getApplyFiles("file_bin_modify"),
},
"modeChange": {
Files: getApplyFiles("file_mode_change"),
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
test.run(t, func(dst io.Writer, src io.ReaderAt, file *File) error {
return Apply(dst, src, file)
})
})
}
}
type applyTest struct {
Files applyFiles
Err interface{}
}
func (at applyTest) run(t *testing.T, apply func(io.Writer, io.ReaderAt, *File) error) {
src, patch, out := at.Files.Load(t)
files, _, err := Parse(bytes.NewReader(patch))
if err != nil {
t.Fatalf("failed to parse patch file: %v", err)
}
if len(files) != 1 {
t.Fatalf("patch should contain exactly one file, but it has %d", len(files))
}
var dst bytes.Buffer
err = apply(&dst, bytes.NewReader(src), files[0])
if at.Err != nil {
assertError(t, at.Err, err, "applying fragment")
return
}
if err != nil {
var aerr *ApplyError
if errors.As(err, &aerr) {
t.Fatalf("unexpected error applying: at %d: fragment %d at %d: %v", aerr.Line, aerr.Fragment, aerr.FragmentLine, err)
} else {
t.Fatalf("unexpected error applying: %v", err)
}
}
if !bytes.Equal(out, dst.Bytes()) {
t.Errorf("incorrect result after apply\nexpected:\n%q\nactual:\n%q", out, dst.Bytes())
}
}
type applyFiles struct {
Src string
Patch string
Out string
}
func getApplyFiles(name string) applyFiles {
return applyFiles{
Src: name + ".src",
Patch: name + ".patch",
Out: name + ".out",
}
}
func (f applyFiles) Load(t *testing.T) (src []byte, patch []byte, out []byte) {
load := func(name, kind string) []byte {
d, err := ioutil.ReadFile(filepath.Join("testdata", "apply", name))
if err != nil {
t.Fatalf("failed to read %s file: %v", kind, err)
}
return d
}
if f.Src != "" {
src = load(f.Src, "source")
}
if f.Patch != "" {
patch = load(f.Patch, "patch")
}
if f.Out != "" {
out = load(f.Out, "output")
}
return
}
|
