Cherrypick

1 files changed, 73 insertions, 0 deletions

diff --git a/cherrypick_test.go b/cherrypick_test.go
new file mode 100644
index 0000000..c867cf9
--- /dev/null
+++ b/cherrypick_test.go
@@ -0,0 +1,73 @@
+package git
+
+import (
+	"io/ioutil"
+	"testing"
+)
+
+func checkout(t *testing.T, repo *Repository, commit *Commit) {
+	tree, err := commit.Tree()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = repo.CheckoutTree(tree, &CheckoutOpts{Strategy: CheckoutSafe})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = repo.SetHeadDetached(commit.Id(), commit.Author(), "checkout")
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+const content = "Herro, Worrd!"
+
+func readReadme(t *testing.T, repo *Repository) string {
+	bytes, err := ioutil.ReadFile(pathInRepo(repo, "README"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	return string(bytes)
+}
+
+func TestCherrypick(t *testing.T) {
+	repo := createTestRepo(t)
+	c1, _ := seedTestRepo(t, repo)
+	c2, _ := updateReadme(t, repo, content)
+
+	commit1, err := repo.LookupCommit(c1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	commit2, err := repo.LookupCommit(c2)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	checkout(t, repo, commit1)
+
+	if readReadme(t, repo) == content {
+		t.Fatalf("README has wrong content after checking out initial commit")
+	}
+
+	opts, err := DefaultCherrypickOptions()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = repo.Cherrypick(commit2, opts)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if readReadme(t, repo) != content {
+		t.Fatalf("README has wrong contents after cherry-picking")
+	}
+
+	state := repo.State()
+	if state != RepositoryStateCherrypick {
+		t.Fatal("Incorrect repository state: ", state)
+	}
+}