Add more support for tags

Implement support for the following libgit2 functions:

- 'git_tag_list' and 'git_tag_list_match'
- 'git_tag_foreach'
- 'git_tag_create_lightweight'

1 files changed, 155 insertions, 0 deletions

diff --git a/tag_test.go b/tag_test.go
index 74f9fec..4bf3889 100644
--- a/tag_test.go
+++ b/tag_test.go
@@ -1,6 +1,7 @@
 package git
 
 import (
+	"errors"
 	"testing"
 	"time"
 )
@@ -24,6 +25,146 @@ func TestCreateTag(t *testing.T) {
 	compareStrings(t, commitId.String(), tag.TargetId().String())
 }
 
+func TestCreateTagLightweight(t *testing.T) {
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	commitID, _ := seedTestRepo(t, repo)
+
+	commit, err := repo.LookupCommit(commitID)
+	checkFatal(t, err)
+
+	tagID, err := repo.Tags.CreateLightweight("v0.1.0", commit, false)
+	checkFatal(t, err)
+
+	_, err = repo.Tags.CreateLightweight("v0.1.0", commit, true)
+	checkFatal(t, err)
+
+	ref, err := repo.References.Lookup("refs/tags/v0.1.0")
+	checkFatal(t, err)
+
+	compareStrings(t, "refs/tags/v0.1.0", ref.Name())
+	compareStrings(t, "v0.1.0", ref.Shorthand())
+	compareStrings(t, tagID.String(), commitID.String())
+	compareStrings(t, commitID.String(), ref.Target().String())
+}
+
+func TestListTags(t *testing.T) {
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	commitID, _ := seedTestRepo(t, repo)
+
+	commit, err := repo.LookupCommit(commitID)
+	checkFatal(t, err)
+
+	createTag(t, repo, commit, "v1.0.1", "Release v1.0.1")
+
+	commitID, _ = updateReadme(t, repo, "Release version 2")
+
+	commit, err = repo.LookupCommit(commitID)
+	checkFatal(t, err)
+
+	createTag(t, repo, commit, "v2.0.0", "Release v2.0.0")
+
+	expected := []string{
+		"v1.0.1",
+		"v2.0.0",
+	}
+
+	actual, err := repo.Tags.List()
+	checkFatal(t, err)
+
+	compareStringList(t, expected, actual)
+}
+
+func TestListTagsWithMatch(t *testing.T) {
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	commitID, _ := seedTestRepo(t, repo)
+
+	commit, err := repo.LookupCommit(commitID)
+	checkFatal(t, err)
+
+	createTag(t, repo, commit, "v1.0.1", "Release v1.0.1")
+
+	commitID, _ = updateReadme(t, repo, "Release version 2")
+
+	commit, err = repo.LookupCommit(commitID)
+	checkFatal(t, err)
+
+	createTag(t, repo, commit, "v2.0.0", "Release v2.0.0")
+
+	expected := []string{
+		"v2.0.0",
+	}
+
+	actual, err := repo.Tags.ListWithMatch("v2*")
+	checkFatal(t, err)
+
+	compareStringList(t, expected, actual)
+
+	expected = []string{
+		"v1.0.1",
+	}
+
+	actual, err = repo.Tags.ListWithMatch("v1*")
+	checkFatal(t, err)
+
+	compareStringList(t, expected, actual)
+}
+
+func TestTagForeach(t *testing.T) {
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	commitID, _ := seedTestRepo(t, repo)
+
+	commit, err := repo.LookupCommit(commitID)
+	checkFatal(t, err)
+
+	tag1 := createTag(t, repo, commit, "v1.0.1", "Release v1.0.1")
+
+	commitID, _ = updateReadme(t, repo, "Release version 2")
+
+	commit, err = repo.LookupCommit(commitID)
+	checkFatal(t, err)
+
+	tag2 := createTag(t, repo, commit, "v2.0.0", "Release v2.0.0")
+
+	expectedNames := []string{
+		"refs/tags/v1.0.1",
+		"refs/tags/v2.0.0",
+	}
+	actualNames := []string{}
+	expectedOids := []string{
+		tag1.String(),
+		tag2.String(),
+	}
+	actualOids := []string{}
+
+	err = repo.Tags.Foreach(func(name string, id *Oid) error {
+		actualNames = append(actualNames, name)
+		actualOids = append(actualOids, id.String())
+		return nil
+	})
+	checkFatal(t, err)
+
+	compareStringList(t, expectedNames, actualNames)
+	compareStringList(t, expectedOids, actualOids)
+
+	fakeErr := errors.New("fake error")
+
+	err = repo.Tags.Foreach(func(name string, id *Oid) error {
+		return fakeErr
+	})
+
+	if err != fakeErr {
+		t.Fatalf("Tags.Foreach() did not return the expected error, got %v", err)
+	}
+}
+
 func compareStrings(t *testing.T, expected, value string) {
 	if value != expected {
 		t.Fatalf("expected '%v', actual '%v'", expected, value)
@@ -43,3 +184,17 @@ func createTestTag(t *testing.T, repo *Repository, commit *Commit) *Oid {
 	checkFatal(t, err)
 	return tagId
 }
+
+func createTag(t *testing.T, repo *Repository, commit *Commit, name, message string) *Oid {
+	loc, err := time.LoadLocation("Europe/Bucharest")
+	checkFatal(t, err)
+	sig := &Signature{
+		Name:  "Rand Om Hacker",
+		Email: "[email protected]",
+		When:  time.Date(2013, 03, 06, 14, 30, 0, 0, loc),
+	}
+
+	tagId, err := repo.CreateTag(name, commit, sig, message)
+	checkFatal(t, err)
+	return tagId
+}