gitnarrative/diff_test.go at master · mbkloster/gitnarrative · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
package main

import (
	"fmt"
	"os"
	"testing"
)

func TestMain(m *testing.M) {
	os.Rename("gitsandbox/.notgit", "gitsandbox/.git")
	code := m.Run()
	os.Rename("gitsandbox/.git", "gitsandbox/.notgit")
	os.Exit(code)
}

func verifyChanges(t *testing.T, filename string, lineNumber int, changes []LineChange) {
	filePath := fmt.Sprintf("./gitsandbox/%s", filename)
	lineContents, err := CurrentLineContents(filePath, lineNumber)
	if err != nil {
		t.Fatalf("Error getting file contents: %v", err)
	}
	lineChangePointer := BlameAndDeriveChange("./gitsandbox", nil, &lineContents, filename, lineNumber)
	i := 0
	for lineChangePointer != nil {
		if i >= len(changes) {
			t.Fatalf("More changes than expected. Expected %d, got more than that", len(changes))
		}
		expectedChange := changes[i]
		if expectedChange.ChangeType != lineChangePointer.ChangeType {
			t.Fatalf("Expected change type %d for change %d, got %d", expectedChange.ChangeType, i+1, (*lineChangePointer).ChangeType)
		}
		if expectedChange.Filename != lineChangePointer.Filename {
			t.Fatalf("Expected filename '%s' for change %d, got '%s'", expectedChange.Filename, i+1, (*lineChangePointer).Filename)
		}
		if expectedChange.LineNumber != lineChangePointer.LineNumber {
			t.Fatalf("Expected line # %d for change %d, got %d", expectedChange.LineNumber, i+1, (*lineChangePointer).LineNumber)
		}
		if expectedChange.Content != lineChangePointer.Content {
			t.Fatalf("Expected content '%s' for change %d, got '%s'", expectedChange.Content, i+1, (*lineChangePointer).Content)
		}
		if expectedChange.Commit.Message != lineChangePointer.Commit.Message {
			t.Fatalf("Expected commit message '%s' for change %d, got '%s'", expectedChange.Commit.Message, i+1, lineChangePointer.Commit.Message)
		}
		i++
		lineChangePointer = lineChangePointer.Previous
	}
	if i < len(changes)-1 {
		t.Fatalf("Failed to check all changes - wanted more than %d, but that's all we found", i+1)
	}
}

func TestAdd(t *testing.T) {
	filename := "thursday.txt"
	lineNumber := 11
	expectedChanges := [...]LineChange{
		{Filename: filename, ChangeType: LINE_ADD, LineNumber: lineNumber, Content: "and they certainly didn't meet the dictionary definition of what the average joe would call an artist,", Commit: CommitDetails{Message: "Add a line"}},
	}
	verifyChanges(t, filename, lineNumber, expectedChanges[:])
}

func TestRenameThenMove(t *testing.T) {
	filename := "numbers.py"
	lineNumber := 3
	expectedChanges := [...]LineChange{
		{Filename: filename, ChangeType: LINE_UPDATE, LineNumber: lineNumber, Content: "ADD = 11", Commit: CommitDetails{Message: "Adjust constants"}},
		{Filename: filename, ChangeType: LINE_MOVE, LineNumber: lineNumber, Content: "ADD = 10", Commit: CommitDetails{Message: "Abstract into constants"}},
		{Filename: "code.py", ChangeType: LINE_MOVE_UPDATE, LineNumber: lineNumber, Content: "ADD = 10", Commit: CommitDetails{Message: "Rename constants"}},
		{Filename: "code.py", ChangeType: LINE_ADD, LineNumber: lineNumber - 1, Content: "PLUS = 10", Commit: CommitDetails{Message: "Introduce a file that will change a lot"}},
	}
	verifyChanges(t, filename, lineNumber, expectedChanges[:])
}