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bluekeyesbluekeyes
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Add tests for file-level application
Also refactor the apply tests to use a common type now that there are three variants that do almost the same thing for each test.
1 parent 19ec1a2 commit 9fc14fd

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10 files changed

+544
-63
lines changed

10 files changed

+544
-63
lines changed

‎gitdiff/apply_test.go‎

Lines changed: 67 additions & 63 deletions
Original file line numberDiff line numberDiff line change
@@ -73,11 +73,8 @@ func TestApplierInvariants(t *testing.T) {
7373
})
7474
}
7575

76-
func TestTextFragmentApplyStrict(t *testing.T) {
77-
tests := map[string]struct {
78-
Files applyFiles
79-
Err error
80-
}{
76+
func TestApplyTextFragment(t *testing.T) {
77+
tests := map[string]applyTest{
8178
"createFile": {Files: getApplyFiles("text_fragment_new")},
8279
"deleteFile": {Files: getApplyFiles("text_fragment_delete_all")},
8380

@@ -131,43 +128,18 @@ func TestTextFragmentApplyStrict(t *testing.T) {
131128

132129
for name, test := range tests {
133130
t.Run(name, func(t *testing.T) {
134-
src, patch, out := test.Files.Load(t)
135-
136-
files, _, err := Parse(bytes.NewReader(patch))
137-
if err != nil {
138-
t.Fatalf("failed to parse patch file: %v", err)
139-
}
140-
if len(files) != 1 {
141-
t.Fatalf("patch should contain exactly one file, but it has %d", len(files))
142-
}
143-
if len(files[0].TextFragments) != 1 {
144-
t.Fatalf("patch should contain exactly one fragment, but it has %d", len(files[0].TextFragments))
145-
}
146-
147-
applier := NewApplier(bytes.NewReader(src))
148-
149-
var dst bytes.Buffer
150-
err = applier.ApplyTextFragment(&dst, files[0].TextFragments[0])
151-
if test.Err != nil {
152-
checkApplyError(t, test.Err, err)
153-
return
154-
}
155-
if err != nil {
156-
t.Fatalf("unexpected error applying fragment: %v", err)
157-
}
158-
159-
if !bytes.Equal(out, dst.Bytes()) {
160-
t.Errorf("incorrect result after apply\nexpected:\n%s\nactual:\n%s", out, dst.Bytes())
161-
}
131+
test.run(t, func(w io.Writer, applier *Applier, file *File) error {
132+
if len(file.TextFragments) != 1 {
133+
t.Fatalf("patch should contain exactly one fragment, but it has %d", len(file.TextFragments))
134+
}
135+
return applier.ApplyTextFragment(w, file.TextFragments[0])
136+
})
162137
})
163138
}
164139
}
165140

166-
func TestBinaryFragmentApply(t *testing.T) {
167-
tests := map[string]struct {
168-
Files applyFiles
169-
Err interface{}
170-
}{
141+
func TestApplyBinaryFragment(t *testing.T) {
142+
tests := map[string]applyTest{
171143
"literalCreate": {Files: getApplyFiles("bin_fragment_literal_create")},
172144
"literalModify": {Files: getApplyFiles("bin_fragment_literal_modify")},
173145
"deltaModify": {Files: getApplyFiles("bin_fragment_delta_modify")},
@@ -205,41 +177,73 @@ func TestBinaryFragmentApply(t *testing.T) {
205177

206178
for name, test := range tests {
207179
t.Run(name, func(t *testing.T) {
208-
src, patch, out := test.Files.Load(t)
180+
test.run(t, func(w io.Writer, applier *Applier, file *File) error {
181+
return applier.ApplyBinaryFragment(w, file.BinaryFragment)
182+
})
183+
})
184+
}
185+
}
186+
187+
func TestApplyFile(t *testing.T) {
188+
tests := map[string]applyTest{
189+
"textModify": {Files: getApplyFiles("text_file_modify")},
190+
"binaryModify": {Files: getApplyFiles("bin_file_modify")},
191+
"modeChange": {Files: getApplyFiles("file_mode_change")},
192+
}
193+
194+
for name, test := range tests {
195+
t.Run(name, func(t *testing.T) {
196+
test.run(t, func(w io.Writer, applier *Applier, file *File) error {
197+
return applier.ApplyFile(w, file)
198+
})
199+
})
200+
}
201+
}
202+
203+
type applyTest struct {
204+
Files applyFiles
205+
Err interface{}
206+
}
207+
208+
func (at applyTest) run(t *testing.T, apply func(io.Writer, *Applier, *File) error) {
209+
src, patch, out := at.Files.Load(t)
209210

210-
files, _, err := Parse(bytes.NewReader(patch))
211-
if err != nil {
212-
t.Fatalf("failed to parse patch file: %v", err)
213-
}
214-
if len(files) != 1 {
215-
t.Fatalf("patch should contain exactly one file, but it has %d", len(files))
216-
}
211+
files, _, err := Parse(bytes.NewReader(patch))
212+
if err != nil {
213+
t.Fatalf("failed to parse patch file: %v", err)
214+
}
215+
if len(files) != 1 {
216+
t.Fatalf("patch should contain exactly one file, but it has %d", len(files))
217+
}
217218

218-
applier := NewApplier(bytes.NewReader(src))
219+
applier := NewApplier(bytes.NewReader(src))
219220

220-
var dst bytes.Buffer
221-
err = applier.ApplyBinaryFragment(&dst, files[0].BinaryFragment)
222-
if test.Err != nil {
223-
checkApplyError(t, test.Err, err)
224-
return
225-
}
226-
if err != nil {
227-
t.Fatalf("unexpected error applying fragment: %v", err)
228-
}
221+
var dst bytes.Buffer
222+
err = apply(&dst, applier, files[0])
223+
if at.Err != nil {
224+
at.assertError(t, err)
225+
return
226+
}
227+
if err != nil {
228+
var aerr *ApplyError
229+
if errors.As(err, &aerr) {
230+
t.Fatalf("unexpected error applying: at %d: fragment %d at %d: %v", aerr.Line, aerr.Fragment, aerr.FragmentLine, err)
231+
} else {
232+
t.Fatalf("unexpected error applying: %v", err)
233+
}
234+
}
229235

230-
if !bytes.Equal(out, dst.Bytes()) {
231-
t.Errorf("incorrect result after apply\nexpected:\n%x\nactual:\n%x", out, dst.Bytes())
232-
}
233-
})
236+
if !bytes.Equal(out, dst.Bytes()) {
237+
t.Errorf("incorrect result after apply\nexpected:\n%x\nactual:\n%x", out, dst.Bytes())
234238
}
235239
}
236240

237-
func checkApplyError(t *testing.T, terr interface{}, err error) {
241+
func (at applyTest) assertError(t *testing.T, err error) {
238242
if err == nil {
239243
t.Fatalf("expected error applying fragment, but got nil")
240244
}
241245

242-
switch terr := terr.(type) {
246+
switch terr := at.Err.(type) {
243247
case string:
244248
if !strings.Contains(err.Error(), terr) {
245249
t.Fatalf("incorrect apply error: %q does not contain %q", err.Error(), terr)
@@ -249,7 +253,7 @@ func checkApplyError(t *testing.T, terr interface{}, err error) {
249253
t.Fatalf("incorrect apply error: expected: %T (%v), actual: %T (%v)", terr, terr, err, err)
250254
}
251255
default:
252-
t.Fatalf("unsupported error type: %T", terr)
256+
t.Fatalf("unsupported expected error type: %T", terr)
253257
}
254258
}
255259

‎gitdiff/testdata/apply/bin_file_modify.out‎

1.06 KB
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‎gitdiff/testdata/apply/bin_file_modify.patch‎

Lines changed: 13 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,13 @@
1+
diff --git a/gitdiff/testdata/apply/bin_file_modify.src b/gitdiff/testdata/apply/bin_file_modify.src
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GIT binary patch
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delta 172
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zcmV;d08{^f2)qc8AP{I3VQ>J`s>wb0HU+h#6w8q?tUO~cHmDjZi2<8yZ9XmKhhMdo
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zWu(4bg|8QwzZ|1e*rL4P#)`Fen<n~ik=E?$qG6?hzJ6$u{l5W#?uwHb0q6w)00000
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zlLZ3%0RfW%1N%UMJ{~Z~0@X${&1Kk#98tb3==a{J7A;`O`v&<T@514_mvMTz72b#n
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atf$#NLoPbNe?RPFJVt1aCFGoQbiKD!OHgJ2
8+
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delta 112
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zcmV-$0FVE?2!IHXAP~DY<7&llQfwqYA%tL<sR@xVtUMD;+4ZG>XTQ5=J2y;^BfB}4
11+
zWkisH791|vOVl5e-@^VLX0s~Ky_UyN!3;CgPr>Edj0j+0gOSwSsFsr$0q6zUJph<q
12+
SlLZ3%0XmZb1N#I__7UCuR5Dxu
13+

‎gitdiff/testdata/apply/bin_file_modify.src‎

1 KB
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‎gitdiff/testdata/apply/file_mode_change.out‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,2 @@
1+
#!/bin/bash
2+
echo "this file is executable"

‎gitdiff/testdata/apply/file_mode_change.patch‎

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,3 @@
1+
diff --git a/gitdiff/testdata/apply/file_mode_change.src b/gitdiff/testdata/apply/file_mode_change.src
2+
old mode 100644
3+
new mode 100755

‎gitdiff/testdata/apply/file_mode_change.src‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,2 @@
1+
#!/bin/bash
2+
echo "this file is executable"

‎gitdiff/testdata/apply/text_file_modify.out‎

Lines changed: 195 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,195 @@
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the first line is different
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this line offsets all the line numbers!
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until here, now we're back on track!
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