package patch
import (
"fmt"
"strings"
"testing"
"github.com/stretchr/testify/assert"
)
const simpleDiff = `diff --git a/filename b/filename
index dcd3485..1ba5540 100644
--- a/filename
+++ b/filename
@@ -1,5 +1,5 @@
apple
-orange
+grape
...
...
...
`
const addNewlineToEndOfFile = `diff --git a/filename b/filename
index 80a73f1..e48a11c 100644
--- a/filename
+++ b/filename
@@ -60,4 +60,4 @@ grape
...
...
...
-last line
\ No newline at end of file
+last line
`
const removeNewlinefromEndOfFile = `diff --git a/filename b/filename
index e48a11c..80a73f1 100644
--- a/filename
+++ b/filename
@@ -60,4 +60,4 @@ grape
...
...
...
-last line
+last line
\ No newline at end of file
`
const twoHunks = `diff --git a/filename b/filename
index e48a11c..b2ab81b 100644
--- a/filename
+++ b/filename
@@ -1,5 +1,5 @@
apple
-grape
+orange
...
...
...
@@ -8,6 +8,8 @@ grape
...
...
...
+pear
+lemon
...
...
...
`
const newFile = `diff --git a/newfile b/newfile
new file mode 100644
index 0000000..4e680cc
--- /dev/null
+++ b/newfile
@@ -0,0 +1,3 @@
+apple
+orange
+grape
`
const addNewlineToPreviouslyEmptyFile = `diff --git a/newfile b/newfile
index e69de29..c6568ea 100644
--- a/newfile
+++ b/newfile
@@ -0,0 +1 @@
+new line
\ No newline at end of file
`
const exampleHunk = `@@ -1,5 +1,5 @@
apple
-grape
+orange
...
...
...
`
// TestModifyPatchForRange is a function.
func TestModifyPatchForRange(t *testing.T) {
type scenario struct {
testName string
filename string
diffText string
firstLineIndex int
lastLineIndex int
reverse bool
expected string
}
scenarios := []scenario{
{
testName: "nothing selected",
filename: "filename",
firstLineIndex: -1,
lastLineIndex: -1,
reverse: false,
diffText: simpleDiff,
expected: "",
},
{
testName: "only context selected",
filename: "filename",
firstLineIndex: 5,
lastLineIndex: 5,
reverse: false,
diffText: simpleDiff,
expected: "",
},
{
testName: "whole range selected",
filename: "filename",
firstLineIndex: 0,
lastLineIndex: 11,
reverse: false,
diffText: simpleDiff,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,5 @@
apple
-orange
+grape
...
...
...
`,
},
{
testName: "only removal selected",
filename: "filename",
firstLineIndex: 6,
lastLineIndex: 6,
reverse: false,
diffText: simpleDiff,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,4 @@
apple
-orange
...
...
...
`,
},
{
testName: "only addition selected",
filename: "filename",
firstLineIndex: 7,
lastLineIndex: 7,
reverse: false,
diffText: simpleDiff,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,6 @@
apple
orange
+grape
...
...
...
`,
},
{
testName: "range that extends beyond diff bounds",
filename: "filename",
firstLineIndex: -100,
lastLineIndex: 100,
reverse: false,
diffText: simpleDiff,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,5 @@
apple
-orange
+grape
...
...
...
`,
},
{
testName: "whole range reversed",
filename: "filename",
firstLineIndex: 0,
lastLineIndex: 11,
reverse: true,
diffText: simpleDiff,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,5 @@
apple
+orange
-grape
...
...
...
`,
},
{
testName: "removal reversed",
filename: "filename",
firstLineIndex: 6,
lastLineIndex: 6,
reverse: true,
diffText: simpleDiff,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,6 @@
apple
+orange
grape
...
...
...
`,
},
{
testName: "removal reversed",
filename: "filename",
firstLineIndex: 7,
lastLineIndex: 7,
reverse: true,
diffText: simpleDiff,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,4 @@
apple
-grape
...
...
...
`,
},
{
testName: "add newline to end of file",
filename: "filename",
firstLineIndex: -100,
lastLineIndex: 100,
reverse: false,
diffText: addNewlineToEndOfFile,
expected: `--- a/filename
+++ b/filename
@@ -60,4 +60,4 @@ grape
...
...
...
-last line
\ No newline at end of file
+last line
`,
},
{
testName: "add newline to end of file, addition only",
filename: "filename",
firstLineIndex: 8,
lastLineIndex: 8,
reverse: true,
diffText: addNewlineToEndOfFile,
expected: `--- a/filename
+++ b/filename
@@ -60,4 +60,5 @@ grape
...
...
...
+last line
\ No newline at end of file
last line
`,
},
{
testName: "add newline to end of file, removal only",
filename: "filename",
firstLineIndex: 10,
lastLineIndex: 10,
reverse: true,
diffText: addNewlineToEndOfFile,
expected: `--- a/filename
+++ b/filename
@@ -60,4 +60,3 @@ grape
...
...
...
-last line
`,
},
{
testName: "remove newline from end of file",
filename: "filename",
firstLineIndex: -100,
lastLineIndex: 100,
reverse: false,
diffText: removeNewlinefromEndOfFile,
expected: `--- a/filename
+++ b/filename
@@ -60,4 +60,4 @@ grape
...
...
...
-last line
+last line
\ No newline at end of file
`,
},
{
testName: "remove newline from end of file, removal only",
filename: "filename",
firstLineIndex: 8,
lastLineIndex: 8,
reverse: false,
diffText: removeNewlinefromEndOfFile,
expected: `--- a/filename
+++ b/filename
@@ -60,4 +60,3 @@ grape
...
...
...
-last line
`,
},
{
testName: "remove newline from end of file, addition only",
filename: "filename",
firstLineIndex: 9,
lastLineIndex: 9,
reverse: false,
diffText: removeNewlinefromEndOfFile,
expected: `--- a/filename
+++ b/filename
@@ -60,4 +60,5 @@ grape
...
...
...
last line
+last line
\ No newline at end of file
`,
},
{
testName: "staging two whole hunks",
filename: "filename",
firstLineIndex: -100,
lastLineIndex: 100,
reverse: false,
diffText: twoHunks,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,5 @@
apple
-grape
+orange
...
...
...
@@ -8,6 +8,8 @@ grape
...
...
...
+pear
+lemon
...
...
...
`,
},
{
testName: "staging part of both hunks",
filename: "filename",
firstLineIndex: 7,
lastLineIndex: 15,
reverse: false,
diffText: twoHunks,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,6 @@
apple
grape
+orange
...
...
...
@@ -8,6 +9,7 @@ grape
...
...
...
+pear
...
...
...
`,
},
{
testName: "staging part of both hunks, reversed",
filename: "filename",
firstLineIndex: 7,
lastLineIndex: 15,
reverse: true,
diffText: twoHunks,
expected: `--- a/filename
+++ b/filename
@@ -1,5 +1,4 @@
apple
-orange
...
...
...
@@ -8,8 +7,7 @@ grape
...
...
...
-pear
lemon
...
...
...
`,
},
{
testName: "adding a new file",
filename: "newfile",
firstLineIndex: -100,
lastLineIndex: 100,
reverse: false,
diffText: newFile,
expected: `--- a/newfile
+++ b/newfile
@@ -0,0 +1,3 @@
+apple
+orange
+grape
`,
},
{
testName: "adding part of a new file",
filename: "newfile",
firstLineIndex: 6,
lastLineIndex: 7,
reverse: false,
diffText: newFile,
expected: `--- a/newfile
+++ b/newfile
@@ -0,0 +1,2 @@
+apple
+orange
`,
},
{
testName: "adding a new file, reversed",
filename: "newfile",
firstLineIndex: -100,
lastLineIndex: 100,
reverse: true,
diffText: newFile,
expected: `--- a/newfile
+++ b/newfile
@@ -1,3 +0,0 @@
-apple
-orange
-grape
`,
},
{
testName: "adding a new line to a previously empty file",
filename: "newfile",
firstLineIndex: -100,
lastLineIndex: 100,
reverse: false,
diffText: addNewlineToPreviouslyEmptyFile,
expected: `--- a/newfile
+++ b/newfile
@@ -0,0 +1,1 @@
+new line
\ No newline at end of file
`,
},
{
testName: "adding a new line to a previously empty file, reversed",
filename: "newfile",
firstLineIndex: -100,
lastLineIndex: 100,
reverse: true,
diffText: addNewlineToPreviouslyEmptyFile,
expected: `--- a/newfile
+++ b/newfile
@@ -1,1 +0,0 @@
-new line
\ No newline at end of file
`,
},
}
for _, s := range scenarios {
s := s
t.Run(s.testName, func(t *testing.T) {
result := ModifiedPatchForRange(nil, s.filename, s.diffText, s.firstLineIndex, s.lastLineIndex, s.reverse, false)
if !assert.Equal(t, s.expected, result) {
fmt.Println(result)
}
})
}
}
func TestLineNumberOfLine(t *testing.T) {
type scenario struct {
testName string
hunk *PatchHunk
idx int
expected int
}
scenarios := []scenario{
{
testName: "nothing selected",
hunk: newHunk(strings.SplitAfter(exampleHunk, "\n"), 10),
idx: 15,
expected: 3,
},
}
for _, s := range scenarios {
s := s
t.Run(s.testName, func(t *testing.T) {
result := s.hunk.LineNumberOfLine(s.idx)
if !assert.Equal(t, s.expected, result) {
fmt.Println(result)
}
})
}
}