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Copy pathdiff_filter_test.go
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339 lines (328 loc) · 6.02 KB
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package git
import (
"bytes"
"reflect"
"regexp"
"strconv"
"testing"
"sourcegraph.com/sourcegraph/go-diff/diff"
)
func TestFilterAndHighlightDiff(t *testing.T) {
const sampleRawDiff = `diff --git f f
index a29bdeb434d874c9b1d8969c40c42161b03fafdc..c0d0fb45c382919737f8d0c20aaf57cf89b74af8 100644
--- f
+++ f
@@ -1,1 +1,2 @@
line1
+line2
`
tests := map[string]struct {
rawDiff string
query string
paths PathOptions
want string
wantHighlights []Highlight
}{
"no matches": {
rawDiff: sampleRawDiff,
query: "line3",
want: "",
wantHighlights: nil,
},
"changed line and context line match": {
rawDiff: sampleRawDiff,
query: "line",
want: sampleRawDiff,
wantHighlights: []Highlight{
{Line: 6, Character: 1, Length: 4},
{Line: 7, Character: 1, Length: 4},
},
},
"only context line matches": {
rawDiff: sampleRawDiff,
query: "line1",
want: "",
wantHighlights: nil,
},
"only changed line matches": {
rawDiff: sampleRawDiff,
query: "line2",
want: sampleRawDiff,
wantHighlights: []Highlight{{Line: 7, Character: 1, Length: 5}},
},
}
for label, test := range tests {
t.Run(label, func(t *testing.T) {
query, err := regexp.Compile(test.query)
if err != nil {
t.Fatal(err)
}
pathMatcher, err := compilePathMatcher(test.paths)
if err != nil {
t.Fatal(err)
}
rawDiff, highlights, err := filterAndHighlightDiff([]byte(test.rawDiff), query, true, pathMatcher)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(string(rawDiff), test.want) {
t.Errorf("got diff %q, want %q", rawDiff, test.want)
}
if !reflect.DeepEqual(highlights, test.wantHighlights) {
t.Errorf("got highlights %v, want %v", highlights, test.wantHighlights)
}
})
}
}
func TestSplitHunkMatches(t *testing.T) {
tests := []struct {
hunks string
query string
matchContextLines int
maxLinesPerHunk int
want string
}{
{
hunks: `@@ -1,2 +1,3 @@ mysection
line1
+line2
line3`,
query: "doesntmatch",
want: ``,
},
// matchContextLines == 0
{
hunks: `@@ -1,2 +1,3 @@ mysection
line1
+line2
line3`,
query: "line",
want: `@@ -2,0 +2,1 @@ mysection
+line2`,
},
{
hunks: `@@ -1,2 +1,3 @@ mysection
line1
+line2
line3
@@ -10,2 +11,2 @@ mysection2
line10
+line11
-line12`,
query: "line",
want: `@@ -2,0 +2,1 @@ mysection
+line2
@@ -11,1 +12,1 @@ mysection2
+line11
-line12`,
},
{
hunks: `@@ -1,1 +1,2 @@
+line1
+line2
-line3`,
query: "line",
want: `@@ -1,1 +1,2 @@
+line1
+line2
-line3`,
},
{
hunks: `@@ -1,3 +1,2 @@
line1
-line2
line3`,
query: "line2",
want: `@@ -2,1 +2,0 @@
-line2`,
},
{
hunks: `@@ -1,3 +1,3 @@
line1
-line2
+line3
line4`,
query: "line[23]",
want: `@@ -2,1 +2,1 @@
-line2
+line3`,
},
{
hunks: `@@ -1,3 +1,4 @@ mysection
line1
+line2
-line3
+line4
line5`,
query: "line[24]",
want: `@@ -2,0 +2,1 @@ mysection
+line2
@@ -3,0 +3,1 @@ mysection
+line4`,
},
// matchContextLines >= 1
{
hunks: `@@ -1,2 +1,3 @@ mysection
line1
+line2
line3`,
query: "line2",
matchContextLines: 1,
want: `@@ -1,2 +1,3 @@ mysection
line1
+line2
line3`,
},
{
hunks: `@@ -1,2 +1,3 @@ mysection
line1
+line2
line3`,
query: "line2",
matchContextLines: 100,
want: `@@ -1,2 +1,3 @@ mysection
line1
+line2
line3`,
},
{
hunks: `@@ -1,3 +1,2 @@
line1
-line2
line3`,
query: "line2",
matchContextLines: 1,
want: `@@ -1,3 +1,2 @@
line1
-line2
line3`,
},
{
hunks: `@@ -1,5 +1,5 @@
line1
line2
-line3
+line4
line5
line6`,
query: "line[34]",
matchContextLines: 1,
want: `@@ -2,3 +2,3 @@
line2
-line3
+line4
line5`,
},
{
hunks: `@@ -1,5 +1,6 @@
line1
line2
+line3
-line4
+line5
line6
line7`,
query: "line[35]",
matchContextLines: 1,
want: `@@ -2,3 +2,4 @@
line2
+line3
-line4
+line5
line6`,
},
{
hunks: `@@ -1,7 +1,8 @@
line1
line2
+line3
line4
-line5
line6
+line7
line8
line9`,
query: "line[37]",
matchContextLines: 1,
want: `@@ -2,2 +2,3 @@
line2
+line3
line4
@@ -5,2 +5,3 @@
line6
+line7
line8`,
},
// maxLinesPerHunk >= 1
{
hunks: `@@ -1,3 +1,3 @@ mysection
line1
+line2
-line3
line4`,
query: "line[23]",
maxLinesPerHunk: 1,
want: `@@ -2,0 +2,1 @@ mysection ... +1
+line2`,
},
// matchContextLines >= 1 && maxLinesPerHunk >= 1
{
hunks: `@@ -1,4 +1,4 @@ mysection
line1
+line2
-line3
+line4
-line5
line6`,
query: "line[2345]",
matchContextLines: 1,
maxLinesPerHunk: 1,
want: `@@ -1,2 +1,2 @@ mysection ... +2
line1
+line2
-line3`,
},
}
for i, test := range tests {
t.Run(strconv.Itoa(i), func(t *testing.T) {
hunks, err := diff.ParseHunks([]byte(test.hunks))
if err != nil {
t.Fatal(err)
}
query, err := regexp.Compile(test.query)
if err != nil {
t.Fatal(err)
}
gotHunks := splitHunkMatches(hunks, query, test.matchContextLines, test.maxLinesPerHunk)
got, err := diff.PrintHunks(gotHunks)
if err != nil {
t.Fatal(err)
}
got = bytes.TrimSpace(got)
if string(got) != test.want {
t.Errorf("hunks\ngot:\n%s\n\nwant:\n%s", got, test.want)
}
})
}
}
func TestTruncateLongLines(t *testing.T) {
const maxCharsPerLine = 5
tests := map[string]string{
"": "",
"1": "1",
"12345": "12345",
"123456": "12345",
"一二三四五六七八九十": "一二三四五",
"一二三四五六七\n一二三四五六七": "一二三四五\n一二三四五",
"😄😱👽😁😘😤😸": "😄😱👽😁😘",
"😄😱👽😁😘😤😸\n😄😱👽😁😘😤😸": "😄😱👽😁😘\n😄😱👽😁😘",
}
for input, want := range tests {
t.Run(input, func(t *testing.T) {
got := truncateLongLines([]byte(input), maxCharsPerLine)
if string(got) != want {
t.Errorf("got %q, want %q", got, want)
}
})
}
}