1 files changed, 164 insertions, 0 deletions
diff --git a/modules/git/repo_compare_test.go b/modules/git/repo_compare_test.go
new file mode 100644
index 00000000..86bd6855
--- /dev/null
+++ b/modules/git/repo_compare_test.go
@@ -0,0 +1,164 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"bytes"
+	"io"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetFormatPatch(t *testing.T) {
+	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
+	clonedPath, err := cloneRepo(t, bareRepo1Path)
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+
+	repo, err := openRepositoryWithDefaultContext(clonedPath)
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+	defer repo.Close()
+
+	rd := &bytes.Buffer{}
+	err = repo.GetPatch("8d92fc95^", "8d92fc95", rd)
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+
+	patchb, err := io.ReadAll(rd)
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+
+	patch := string(patchb)
+	assert.Regexp(t, "^From 8d92fc95", patch)
+	assert.Contains(t, patch, "Subject: [PATCH] Add file2.txt")
+}
+
+func TestReadPatch(t *testing.T) {
+	// Ensure we can read the patch files
+	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
+	repo, err := openRepositoryWithDefaultContext(bareRepo1Path)
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+	defer repo.Close()
+	// This patch doesn't exist
+	noFile, err := repo.ReadPatchCommit(0)
+	require.Error(t, err)
+
+	// This patch is an empty one (sometimes it's a 404)
+	noCommit, err := repo.ReadPatchCommit(1)
+	require.Error(t, err)
+
+	// This patch is legit and should return a commit
+	oldCommit, err := repo.ReadPatchCommit(2)
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+
+	assert.Empty(t, noFile)
+	assert.Empty(t, noCommit)
+	assert.Len(t, oldCommit, 40)
+	assert.Equal(t, "6e8e2a6f9efd71dbe6917816343ed8415ad696c3", oldCommit)
+}
+
+func TestReadWritePullHead(t *testing.T) {
+	// Ensure we can write SHA1 head corresponding to PR and open them
+	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
+
+	// As we are writing we should clone the repository first
+	clonedPath, err := cloneRepo(t, bareRepo1Path)
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+
+	repo, err := openRepositoryWithDefaultContext(clonedPath)
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+	defer repo.Close()
+
+	// Try to open non-existing Pull
+	_, err = repo.GetRefCommitID(PullPrefix + "0/head")
+	require.Error(t, err)
+
+	// Write a fake sha1 with only 40 zeros
+	newCommit := "feaf4ba6bc635fec442f46ddd4512416ec43c2c2"
+	err = repo.SetReference(PullPrefix+"1/head", newCommit)
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+
+	// Read the file created
+	headContents, err := repo.GetRefCommitID(PullPrefix + "1/head")
+	if err != nil {
+		require.NoError(t, err)
+		return
+	}
+
+	assert.Len(t, headContents, 40)
+	assert.Equal(t, newCommit, headContents)
+
+	// Remove file after the test
+	err = repo.RemoveReference(PullPrefix + "1/head")
+	require.NoError(t, err)
+}
+
+func TestGetCommitFilesChanged(t *testing.T) {
+	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
+	repo, err := openRepositoryWithDefaultContext(bareRepo1Path)
+	require.NoError(t, err)
+	defer repo.Close()
+
+	objectFormat, err := repo.GetObjectFormat()
+	require.NoError(t, err)
+
+	testCases := []struct {
+		base, head string
+		files      []string
+	}{
+		{
+			objectFormat.EmptyObjectID().String(),
+			"95bb4d39648ee7e325106df01a621c530863a653",
+			[]string{"file1.txt"},
+		},
+		{
+			objectFormat.EmptyObjectID().String(),
+			"8d92fc957a4d7cfd98bc375f0b7bb189a0d6c9f2",
+			[]string{"file2.txt"},
+		},
+		{
+			"95bb4d39648ee7e325106df01a621c530863a653",
+			"8d92fc957a4d7cfd98bc375f0b7bb189a0d6c9f2",
+			[]string{"file2.txt"},
+		},
+		{
+			objectFormat.EmptyTree().String(),
+			"8d92fc957a4d7cfd98bc375f0b7bb189a0d6c9f2",
+			[]string{"file1.txt", "file2.txt"},
+		},
+	}
+
+	for _, tc := range testCases {
+		changedFiles, err := repo.GetFilesChangedBetween(tc.base, tc.head)
+		require.NoError(t, err)
+		assert.ElementsMatch(t, tc.files, changedFiles)
+	}
+}