selftest.h: add ASSERT_STR_CONTAINS

gcc/ChangeLog:
	* selftest.c (selftest::assert_str_contains): New function.
	(selftest::test_assertions): Verify ASSERT_STR_CONTAINS.
	* selftest.h (selftest::assert_str_contains): New decl.
	(ASSERT_STR_CONTAINS): New macro.

From-SVN: r239707

gcc/ChangeLog

+2016-08-23  David Malcolm  <dmalcolm@redhat.com>
+
+	* selftest.c (selftest::assert_str_contains): New function.
+	(selftest::test_assertions): Verify ASSERT_STR_CONTAINS.
+	* selftest.h (selftest::assert_str_contains): New decl.
+	(ASSERT_STR_CONTAINS): New macro.
+
 2016-08-23  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/77286

gcc/selftest.c

@@ -87,6 +87,39 @@ selftest::assert_streq (const location &loc,
 	 desc_expected, desc_actual, val_expected, val_actual);
 }
 
+/* Implementation detail of ASSERT_STR_CONTAINS.
+   Use strstr to determine if val_needle is is within val_haystack.
+   ::selftest::pass if it is found.
+   ::selftest::fail if it is not found.  */
+
+void
+selftest::assert_str_contains (const location &loc,
+			       const char *desc_haystack,
+			       const char *desc_needle,
+			       const char *val_haystack,
+			       const char *val_needle)
+{
+  /* If val_haystack is NULL, fail with a custom error message.  */
+  if (val_haystack == NULL)
+    ::selftest::fail_formatted
+	(loc, "ASSERT_STR_CONTAINS (%s, %s) haystack=NULL",
+	 desc_haystack, desc_needle);
+
+  /* If val_needle is NULL, fail with a custom error message.  */
+  if (val_needle == NULL)
+    ::selftest::fail_formatted
+	(loc, "ASSERT_STR_CONTAINS (%s, %s) haystack=\"%s\" needle=NULL",
+	 desc_haystack, desc_needle, val_haystack);
+
+  const char *test = strstr (val_haystack, val_needle);
+  if (test)
+    ::selftest::pass (loc, "ASSERT_STR_CONTAINS");
+  else
+    ::selftest::fail_formatted
+	(loc, "ASSERT_STR_CONTAINS (%s, %s) haystack=\"%s\" needle=\"%s\"",
+	 desc_haystack, desc_needle, val_haystack, val_needle);
+}
+
 /* Constructor.  Create a tempfile using SUFFIX, and write CONTENT to
    it.  Abort if anything goes wrong, using LOC as the effective
    location in the problem report.  */
@@ -131,6 +164,7 @@ test_assertions ()
   ASSERT_NE (1, 2);
   ASSERT_STREQ ("test", "test");
   ASSERT_STREQ_AT (SELFTEST_LOCATION, "test", "test");
+  ASSERT_STR_CONTAINS ("foo bar baz", "bar");
 }
 
 /* Run all of the selftests within this file.  */

gcc/selftest.h

@@ -69,6 +69,14 @@ extern void assert_streq (const location &loc,
 			  const char *desc_expected, const char *desc_actual,
 			  const char *val_expected, const char *val_actual);
 
+/* Implementation detail of ASSERT_STR_CONTAINS.  */
+
+extern void assert_str_contains (const location &loc,
+				 const char *desc_haystack,
+				 const char *desc_needle,
+				 const char *val_haystack,
+				 const char *val_needle);
+
 /* A class for writing out a temporary sourcefile for use in selftests
    of input handling.  */
 
@@ -249,6 +257,17 @@ extern int num_passes;
 			    (EXPECTED), (ACTUAL));		    \
   SELFTEST_END_STMT
 
+/* Evaluate HAYSTACK and NEEDLE and use strstr to determine if NEEDLE
+   is within HAYSTACK.
+   ::selftest::pass if NEEDLE is found.
+   ::selftest::fail if it is not found.  */
+
+#define ASSERT_STR_CONTAINS(HAYSTACK, NEEDLE)				\
+  SELFTEST_BEGIN_STMT							\
+  ::selftest::assert_str_contains (SELFTEST_LOCATION, #HAYSTACK, #NEEDLE, \
+				   (HAYSTACK), (NEEDLE));		\
+  SELFTEST_END_STMT
+
 /* Evaluate PRED1 (VAL1), calling ::selftest::pass if it is true,
    ::selftest::fail if it is false.  */