Refactor Repo code and tests

- Add Repo as a separate type
- Merge together repo status and branches status
- Load status on repo opening

pkg/repo_test.go

@@ -10,14 +10,16 @@ func TestFetch(t *testing.T) {
 	createCommit(t, origin, "Initial commit")
 
 	// Clone the origin repo
-	repo, err := CloneRepo(origin.Path(), newTempDir(t))
+	dir := newTempDir(t)
+	err := CloneRepo(origin.Path(), dir)
+	checkFatal(t, err)
+
+	// Open cloned repo and load its status
+	repo, err := OpenRepo(dir)
 	checkFatal(t, err)
 
 	// Check cloned status. It should not be behind origin
-	status, err := NewRepoStatus(repo.Workdir())
-	checkFatal(t, err)
-
-	if status.BranchStatuses["master"].Behind != 0 {
+	if repo.Status.Branches["master"].Behind != 0 {
 		t.Errorf("Master should not be behind")
 	}
 
@@ -27,16 +29,17 @@ func TestFetch(t *testing.T) {
 	createCommit(t, origin, "Second commit")
 
 	// Fetch cloned repo and check the status again
-	err = Fetch(repo)
-	status, err = NewRepoStatus(repo.Workdir())
+	err = repo.Fetch()
+	checkFatal(t, err)
+	err = repo.Reload()
 	checkFatal(t, err)
 
 	// Cloned master should now be 1 commit behind origin
-	if status.BranchStatuses["master"].Behind != 1 {
+	if repo.Status.Branches["master"].Behind != 1 {
 		t.Errorf("Master should be 1 commit behind")
 	}
 
-	if status.BranchStatuses["master"].Ahead != 0 {
+	if repo.Status.Branches["master"].Ahead != 0 {
 		t.Errorf("Master should not be ahead")
 	}
 }