Initial implementation of an elasticsearch indexer in Go

Closes #1 (closed)

git/repository_test.go

@@ -154,19 +154,39 @@ func TestEachCommitGivenRangeOf1Commit(t *testing.T) {
 	assert.Equal(t, []string{}, commitHashes)
 }
-func TestEachFileChange(t *testing.T) {
+func TestEmptyToSHADefaultsToHeadSHA(t *testing.T) {
 	checkDeps(t)
-	repo, err := git.NewGoGitRepository(*testRepo, "", headSHA)
+	repo, err := git.NewGoGitRepository(*testRepo, "498214de67004b1da3d820901307bed2a68a8ef6", "")
+	assert.NoError(t, err)
+
+	_, commitHashes, err := runEachCommit(repo)
 	assert.NoError(t, err)
+	assert.Equal(t, []string{headSHA}, commitHashes)
+}
+// TODO: store the ins/mod/del status of each change
+func runEachFileChange(repo git.Repository) (map[string]*git.File, []string, error) {
 	files := make(map[string]*git.File)
 	filePaths := []string{}
-	err = repo.EachFileChange(func(f *git.File, _, _ string) error {
+
+	store := func(f *git.File, _, _ string) error {
 		files[f.Path] = f
 		filePaths = append(filePaths, f.Path)
 		return nil
-	}, nil, nil)
+	}
+
+	err := repo.EachFileChange(store, store, store)
+	return files, filePaths, err
+}
+
+func TestEachFileChangeMod(t *testing.T) {
+	checkDeps(t)
+
+	repo, err := git.NewGoGitRepository(*testRepo, "", headSHA)
+	assert.NoError(t, err)
+
+	files, filePaths, err := runEachFileChange(repo)
 	assert.NoError(t, err)
 	expectedFiles := []string{
@@ -228,3 +248,25 @@ func TestEachFileChange(t *testing.T) {
 	assert.Equal(t, int64(10), file.Size)
 	assert.Equal(t, "6.7.0.pre\n", string(data))
 }
+
+func TestEachFileChangeGivenRangeOfThreeCommits(t *testing.T) {
+	checkDeps(t)
+
+	repo, err := git.NewGoGitRepository(*testRepo, "1b12f15a11fc6e62177bef08f47bc7b5ce50b141", headSHA)
+	assert.NoError(t, err)
+
+	_, filePaths, err := runEachFileChange(repo)
+
+	assert.Equal(t, []string{"bar/branch-test.txt"}, filePaths)
+}
+
+func TestEachFileChangeGivenRangeOfTwoCommits(t *testing.T) {
+	checkDeps(t)
+
+	repo, err := git.NewGoGitRepository(*testRepo, "498214de67004b1da3d820901307bed2a68a8ef6", headSHA)
+	assert.NoError(t, err)
+
+	_, filePaths, err := runEachFileChange(repo)
+
+	assert.Equal(t, []string{}, filePaths)
+}