src/util/tests/string_buffer/string_buffer_test.cpp

   1 /*
   2  * Copyright © 2017 Thomas Helland
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <assert.h>
  29 #include <gtest/gtest.h>
  30 #include "util/string_buffer.h"
  31
  32 /**
  33  * \file string_buffer_test.cpp
  34  *
  35  * Test the string buffer implementation
  36  */
  37
  38 #define INITIAL_BUF_SIZE 6
  39 class string_buffer : public ::testing::Test {
  40 public:
  41
  42    struct _mesa_string_buffer *buf;
  43    const char *str1;
  44    const char *str2;
  45    const char *str3;
  46    char str4[80];
  47    char str5[40];
  48
  49    virtual void SetUp();
  50    virtual void TearDown();
  51 };
  52
  53 void
  54 string_buffer::SetUp()
  55 {
  56    str1 = "test1";
  57    str2 = "test2";
  58    str3 = "test1test2";
  59    buf = _mesa_string_buffer_create(NULL, INITIAL_BUF_SIZE);
  60 }
  61
  62 void
  63 string_buffer::TearDown()
  64 {
  65    /* Finally, clean up after us */
  66    _mesa_string_buffer_destroy(buf);
  67 }
  68
  69 static uint32_t
  70 space_left_in_buffer(_mesa_string_buffer *buf)
  71 {
  72    return buf->capacity - buf->length - 1;
  73 }
  74
  75 TEST_F(string_buffer, string_buffer_tests)
  76 {
  77    /* The string terminator needs one byte, so there should one "missing" */
  78    EXPECT_TRUE(space_left_in_buffer(buf) == INITIAL_BUF_SIZE - 1);
  79
  80    /* Start by appending str1 */
  81    EXPECT_TRUE(_mesa_string_buffer_append(buf, str1));
  82    EXPECT_TRUE(space_left_in_buffer(buf) ==
  83                INITIAL_BUF_SIZE - strlen(str1) - 1);
  84    EXPECT_TRUE(strcmp(buf->buf, str1) == 0);
  85
  86    /* Add more, so that the string is resized */
  87    EXPECT_TRUE(_mesa_string_buffer_append(buf, str2));
  88
  89    /* The string should now be equal to str3 */
  90    EXPECT_TRUE(strcmp(buf->buf, str3) == 0);
  91
  92    /* Check that the length of the string is reset when clearing */
  93    _mesa_string_buffer_clear(buf);
  94    EXPECT_TRUE(buf->length == 0);
  95    EXPECT_TRUE(strlen(buf->buf) == 0);
  96
  97    /* Test a string with some formatting */
  98    snprintf(str4, sizeof(str4), "Testing formatting %d, %f", 100, 1.0);
  99    EXPECT_TRUE(_mesa_string_buffer_printf(buf, "Testing formatting %d, %f", 100, 1.0));
 100    EXPECT_TRUE(strcmp(buf->buf, str4) == 0);
 101
 102    /* Compile a string with some other formatting */
 103    snprintf(str5, sizeof(str5), "Testing formatting %d, %x", 100, 0xDEADBEAF);
 104
 105    /* Concatenate str5 to str4 */
 106    strncat(str4, str5, sizeof(str5));
 107
 108    /* Now use the formatted append function again */
 109    EXPECT_TRUE(_mesa_string_buffer_printf(buf, "Testing formatting %d, %x", 100, 0xDEADBEAF));
 110
 111    /* The string buffer should now be equal to str4 */
 112    EXPECT_TRUE(strcmp(buf->buf, str4) == 0);
 113
 114    _mesa_string_buffer_clear(buf);
 115
 116    /* Test appending by one char at a time */
 117    EXPECT_TRUE(_mesa_string_buffer_append_char(buf, 'a'));
 118    EXPECT_TRUE(buf->length == 1);
 119    EXPECT_TRUE(strcmp(buf->buf, "a") == 0);
 120    EXPECT_TRUE(_mesa_string_buffer_append_char(buf, 'a'));
 121    EXPECT_TRUE(strcmp(buf->buf, "aa") == 0);
 122 }