Revert "quad: add testing suite"

This reverts commit 57de2c28

quad/lib/test/.gitignore

-example
\ No newline at end of file

quad/lib/test/Makefile

-example: example.c test.c test.h
-	gcc -g -o example example.c test.c test.h
-
-clean:
-	rm example

quad/lib/test/README.md

-Basic Testing Suite in C
-----
-This test suite helps you run tests. It handles the result of every test
-whether it be a success, failure, or segfault, and keeps running until
-all tests have been executed. It then gives a summary of the test results.
-
-To use, just write your tests using functions that return `int`s to indicate
-failure. 1 means failure. 0 means success.
-
-Then in your main function for your tests, pass these functions to the `test()`
-function along with a name you want included in the test report.
-
-```c
-int main() {
-    test(test_func, "this test will pass!");
-    test(another_func, "this one might fail...");
-    ...
-```
-
-Then at the end of your main function, call the `test_summary()` function, and
-return its return value from your main function.
-
-```c
-int main() {
-    ...
-    return test_summary();
-}
-```
-
-An `example.c` file is included for reference.
\ No newline at end of file

quad/lib/test/example.c

-#include <stdio.h>
-#include "test.h"
-
-int test1() {
-  puts("hi world.");
-  return 0;
-}
-
-int test2() {
-  return 1;
-}
-
-int test3() {
-  int *bad = NULL;
-  int x = *bad;
-  return 0;
-}
-
-int main() {
-  test(test1, "print hello world");
-  test(test2, "just fail");
-  test(test3, "survive segfault");
-  return test_summary();
-}

quad/lib/test/test.c

-#include "test.h"
-
-static int num_tests = 0;
-static struct Test tests[128];
-static int longest_test_name = 0;
-
-void test(int (*function)(), char *test_name) {
-  int test_name_length = strlen(test_name);
-  if (test_name_length > longest_test_name) {
-    longest_test_name = test_name_length;
-  }
-
-  pid_t pid = fork();
-  if (pid == 0) {
-    // test process
-    int exit_status = function();
-    exit(exit_status);
-  } else {
-    int status;
-    waitpid(pid, &status, 0);
-
-    struct Test test;
-    strcpy(test.name, test_name);
-
-    if (WIFEXITED(status)) {
-      int exit_status = WEXITSTATUS(status);
-      if (exit_status == 0) {
-	test.failed = 0;
-	strcpy(test.result_msg, "passed");
-      } else {
-	test.failed = 1;
-	strcpy(test.result_msg,  "FAILED");
-      }
-    } else if (WIFSIGNALED(status)) {
-      test.failed = 1;
-      strcpy(test.result_msg, "ERROR!");
-    }
-
-    tests[num_tests++] = test;
-  }
-}
-
-int test_summary() {
-  unsigned char at_least_one_test_failed = 0;
-  int num_failed = 0;
-  puts("---------------------------------");
-  puts("Test results:");
-  puts("");
-  int i = 0;
-  for (i = 0; i < num_tests; i += 1) {
-    printf("#%3d: %-*s (%s)\n", i + 1, longest_test_name, tests[i].name, tests[i].result_msg);
-    num_failed += tests[i].failed;
-    at_least_one_test_failed |= tests[i].failed;
-  }
-  puts("");
-  printf("Total: %3d of %-3d tests passed\n", num_tests - num_failed, num_tests);
-  puts("---------------------------------");
-  num_tests = 0;
-  longest_test_name = 0;
-  return at_least_one_test_failed;
-}

quad/lib/test/test.h

-#ifndef TEST_H
-#define TEST_H
-
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-
-struct Test {
-  char name[64];
-  char result_msg[32];
-  unsigned char failed;
-};
-
-void test(int (*)(), char *);
-int test_summary();
-
-#endif