tests: add tests on logger tail functions (issue #1926)

tests/unit/plugins/logger/test-logger-tail.cpp

@@ -0,0 +1,128 @@
+/*
+ * test-logger-tail.cpp - test logger tail functions
+ *
+ * Copyright (C) 2023 Sébastien Helleu <flashcode@flashtux.org>
+ *
+ * This file is part of WeeChat, the extensible chat client.
+ *
+ * WeeChat is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * WeeChat is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with WeeChat.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "CppUTest/TestHarness.h"
+
+#include "tests/tests.h"
+
+extern "C"
+{
+#include <unistd.h>
+#include <stdio.h>
+#include "src/core/wee-arraylist.h"
+#include "src/core/wee-string.h"
+#include "src/plugins/logger/logger-tail.h"
+
+extern const char *logger_tail_last_eol (const char *string_start,
+                                         const char *string_ptr);
+}
+
+TEST_GROUP(LoggerTail)
+{
+};
+
+/*
+ * Tests functions:
+ *   logger_tail_last_eol
+ */
+
+TEST(LoggerTail, LoggerTailLastEol)
+{
+    const char *str = "abc\ndef\rghi";
+
+    POINTERS_EQUAL(NULL, logger_tail_last_eol (NULL, NULL));
+    POINTERS_EQUAL(NULL, logger_tail_last_eol (NULL, ""));
+    POINTERS_EQUAL(NULL, logger_tail_last_eol ("", NULL));
+    POINTERS_EQUAL(NULL, logger_tail_last_eol ("", ""));
+    POINTERS_EQUAL(NULL, logger_tail_last_eol (str + 9, str));
+
+    POINTERS_EQUAL(NULL, logger_tail_last_eol (str, str));
+    POINTERS_EQUAL(NULL, logger_tail_last_eol (str, str + 1));
+    POINTERS_EQUAL(NULL, logger_tail_last_eol (str, str + 2));
+
+    POINTERS_EQUAL(str + 3, logger_tail_last_eol (str, str + 3));
+    POINTERS_EQUAL(str + 3, logger_tail_last_eol (str, str + 4));
+    POINTERS_EQUAL(str + 3, logger_tail_last_eol (str, str + 5));
+    POINTERS_EQUAL(str + 3, logger_tail_last_eol (str, str + 6));
+
+    POINTERS_EQUAL(str + 7, logger_tail_last_eol (str, str + 7));
+    POINTERS_EQUAL(str + 7, logger_tail_last_eol (str, str + 8));
+    POINTERS_EQUAL(str + 7, logger_tail_last_eol (str, str + 9));
+    POINTERS_EQUAL(str + 7, logger_tail_last_eol (str, str + 10));
+}
+
+/*
+ * Tests functions:
+ *   logger_tail_file
+ *   logger_tail_free
+ */
+
+TEST(LoggerTail, LoggerTailFile)
+{
+    char *filename;
+    FILE *file;
+    const char *content = "line 1\nline 2\nline 3";
+    struct t_arraylist *lines;
+
+    /* write a test file */
+    filename = string_eval_path_home ("${weechat_data_dir}/test_file.txt",
+                                      NULL, NULL, NULL);
+    file = fopen (filename, "w");
+    fwrite (content, 1, strlen (content), file);
+    fflush (file);
+    fclose (file);
+
+    POINTERS_EQUAL(NULL, logger_tail_file (NULL, 0));
+    POINTERS_EQUAL(NULL, logger_tail_file (NULL, 1));
+    POINTERS_EQUAL(NULL, logger_tail_file (filename, 0));
+
+    lines = logger_tail_file (filename, 1);
+    CHECK(lines);
+    LONGS_EQUAL(1, arraylist_size (lines));
+    STRCMP_EQUAL("line 3", (const char *)arraylist_get (lines, 0));
+    arraylist_free (lines);
+
+    lines = logger_tail_file (filename, 2);
+    CHECK(lines);
+    LONGS_EQUAL(2, arraylist_size (lines));
+    STRCMP_EQUAL("line 2", (const char *)arraylist_get (lines, 0));
+    STRCMP_EQUAL("line 3", (const char *)arraylist_get (lines, 1));
+    arraylist_free (lines);
+
+    lines = logger_tail_file (filename, 3);
+    CHECK(lines);
+    LONGS_EQUAL(3, arraylist_size (lines));
+    STRCMP_EQUAL("line 1", (const char *)arraylist_get (lines, 0));
+    STRCMP_EQUAL("line 2", (const char *)arraylist_get (lines, 1));
+    STRCMP_EQUAL("line 3", (const char *)arraylist_get (lines, 2));
+    arraylist_free (lines);
+
+    lines = logger_tail_file (filename, 4);
+    CHECK(lines);
+    LONGS_EQUAL(3, arraylist_size (lines));
+    STRCMP_EQUAL("line 1", (const char *)arraylist_get (lines, 0));
+    STRCMP_EQUAL("line 2", (const char *)arraylist_get (lines, 1));
+    STRCMP_EQUAL("line 3", (const char *)arraylist_get (lines, 2));
+    arraylist_free (lines);
+
+    unlink (filename);
+    free (filename);
+}