pipeline: handle parsing of single-command pipelines

tests/Makefile

@@ -2,6 +2,7 @@
 # file are prefixed with test_
 rawtests = \
 	metacharacters \
+	parse_pipelines \
 	parse_simple_cmds \
 	test_env_manip \
 	word_splitting \

tests/parse_pipelines.c

@@ -0,0 +1,62 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parse_pipelines.c                                  :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/02/21 13:13:58 by khais             #+#    #+#             */
+/*   Updated: 2025/02/21 13:44:16 by khais            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "../src/parser/pipeline/pipeline.h"
+#include "../src/parser/wordsplit/wordsplit.h"
+#include <assert.h>
+#include "ft_printf.h"
+#include "libft.h"
+#include "unistd.h"
+#include <limits.h>
+
+static t_pipeline	*parse_pipeline(char *input)
+{
+	t_wordlist	*words = minishell_wordsplit(input);
+	t_pipeline	*pipeline = pipeline_from_wordlist(words);
+	return (pipeline);
+}
+
+static void	assert_pipeline_cmd_word(t_pipeline *pipeline, char *expected_word, int cmd_num, int word_num)
+{
+	if (pipeline->num_cmd <= cmd_num)
+	{
+		ft_dprintf(STDERR_FILENO, "expected pipeline %p to have at least %d words, but got %d\n", pipeline, cmd_num + 1, pipeline->num_cmd);
+		assert(false);
+	}
+	char	*got_word = wordlist_get(pipeline->cmds[cmd_num]->words, word_num)->word;
+	ft_dprintf(STDERR_FILENO, "for pipeline %p cmd %d word %d, expected '%s', and got '%s'\n", pipeline, cmd_num, word_num, expected_word, got_word);
+	assert(expected_word == got_word || ft_strncmp(expected_word, got_word, INT_MAX) == 0);
+}
+
+static void	test_parse_empty_pipeline(void)
+{
+	t_pipeline	*pipeline = parse_pipeline("");
+	assert(pipeline == NULL);
+	pipeline_destroy(pipeline);
+}
+
+static void	test_parse_pipeline_single_cmd(void)
+{
+	t_pipeline	*pipeline = parse_pipeline("echo hello world");
+	assert(pipeline->num_cmd == 1);
+	assert_pipeline_cmd_word(pipeline, "echo", 0, 0);
+	assert_pipeline_cmd_word(pipeline, "hello", 0, 1);
+	assert_pipeline_cmd_word(pipeline, "world", 0, 2);
+	pipeline_destroy(pipeline);
+}
+
+int	main(void)
+{
+	test_parse_empty_pipeline();
+	test_parse_pipeline_single_cmd();
+	return (0);
+}