Add slow test for process_t for main loop interaction.

This patch adds test cases for process_t which uses Tor's main loop.
This allows us to test that the callbacks are actually invoked by the
main loop when we expect them.

See: https://bugs.torproject.org/28179

1 files changed, 85 insertions, 0 deletions

diff --git a/src/test/test-process.c b/src/test/test-process.c
new file mode 100644
index 0000000000..ec1b395002
--- /dev/null
+++ b/src/test/test-process.c
@@ -0,0 +1,85 @@
+/* Copyright (c) 2011-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#include "orconfig.h"
+#include <stdio.h>
+#ifdef _WIN32
+#define WINDOWS_LEAN_AND_MEAN
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif /* defined(_WIN32) */
+#include <string.h>
+#include <stdlib.h>
+
+#ifdef _WIN32
+#define SLEEP(sec) Sleep((sec)*1000)
+#else
+#define SLEEP(sec) sleep(sec)
+#endif
+
+/* Trivial test program to test process_t. */
+int
+main(int argc, char **argv)
+{
+  /* Does our process get the right arguments? */
+  for (int i = 0; i < argc; ++i) {
+    fprintf(stdout, "argv[%d] = '%s'\n", i, argv[i]);
+    fflush(stdout);
+  }
+
+  /* Make sure our process got our environment variable. */
+  fprintf(stdout, "Environment variable TOR_TEST_ENV = '%s'\n",
+          getenv("TOR_TEST_ENV"));
+  fflush(stdout);
+
+  /* Test line handling on stdout and stderr. */
+  fprintf(stdout, "Output on stdout\nThis is a new line\n");
+  fflush(stdout);
+
+  fprintf(stderr, "Output on stderr\nThis is a new line\n");
+  fflush(stderr);
+
+  fprintf(stdout, "Partial line on stdout ...");
+  fflush(stdout);
+
+  fprintf(stderr, "Partial line on stderr ...");
+  fflush(stderr);
+
+  SLEEP(2);
+
+  fprintf(stdout, "end of partial line on stdout\n");
+  fflush(stdout);
+  fprintf(stderr, "end of partial line on stderr\n");
+  fflush(stderr);
+
+  /* Echo input from stdin. */
+  char buffer[1024];
+
+  int count = 0;
+
+  while (fgets(buffer, sizeof(buffer), stdin)) {
+    /* Strip the newline. */
+    size_t size = strlen(buffer);
+
+    if (size >= 1 && buffer[size - 1] == '\n') {
+      buffer[size - 1] = '\0';
+      --size;
+    }
+
+    if (size >= 1 && buffer[size - 1] == '\r') {
+      buffer[size - 1] = '\0';
+      --size;
+    }
+
+    fprintf(stdout, "Read line from stdin: '%s'\n", buffer);
+    fflush(stdout);
+
+    if (++count == 3)
+      break;
+  }
+
+  fprintf(stdout, "We are done for here, thank you!\n");
+
+  return 0;
+}