package core

import (
	"bytes"
	"testing"
)

func TestNewRejectsNilWriters(t *testing.T) {
	t.Run("nil stdout", func(t *testing.T) {
		app, err := New(nil, &bytes.Buffer{})
		if err == nil {
			t.Fatal("expected error for nil stdout")
		}
		if app != nil {
			t.Fatal("expected nil app for nil stdout")
		}
	})

	t.Run("nil stderr", func(t *testing.T) {
		app, err := New(&bytes.Buffer{}, nil)
		if err == nil {
			t.Fatal("expected error for nil stderr")
		}
		if app != nil {
			t.Fatal("expected nil app for nil stderr")
		}
	})
}

func TestDeriveDestination(t *testing.T) {
	tests := []struct {
		name string
		uri  string
		want string
	}{
		{name: "github short", uri: "technicalpickles/pickled-vim", want: "pickled-vim"},
		{name: "https", uri: "https://github.com/technicalpickles/pickled-vim.git", want: "pickled-vim"},
		{name: "git ssh", uri: "git@github.com:technicalpickles/pickled-vim.git", want: "pickled-vim"},
		{name: "file", uri: "file:///tmp/dotfiles.git", want: "dotfiles"},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := deriveDestination(tt.uri); got != tt.want {
				t.Fatalf("deriveDestination(%q) = %q, want %q", tt.uri, got, tt.want)
			}
		})
	}
}