add tests for the perl_classes and word_boundary options

src/tests/compile_fail.vtc

@@ -232,3 +232,44 @@ varnish v1 -errvcl {vmod re2 error: Cannot compile '(a{1}*)' in bad constructor:
 	        new bad = re2.regex("(a{1}*)");
 	}
 }
+
+# Now verify the combination of posix_syntax with perl_classes and
+# word_boundary
+
+varnish v1 -errvcl {vmod re2 error: Cannot compile '\d \s \w \D \S \W' in bad constructor: invalid escape sequence: \d} {
+	import re2 from "${vmod_topbuild}/src/.libs/libvmod_re2.so";
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_init {
+	        new bad = re2.regex("\d \s \w \D \S \W", posix_syntax=true);
+	}
+}
+
+varnish v1 -vcl {
+	import re2 from "${vmod_topbuild}/src/.libs/libvmod_re2.so";
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_init {
+	        new good = re2.regex("\d \s \w \D \S \W", posix_syntax=true,
+		                     perl_classes=true);
+	}
+}
+
+varnish v1 -errvcl {vmod re2 error: Cannot compile '\b \B' in bad constructor: invalid escape sequence: \b} {
+	import re2 from "${vmod_topbuild}/src/.libs/libvmod_re2.so";
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_init {
+	        new bad = re2.regex("\b \B", posix_syntax=true);
+	}
+}
+
+varnish v1 -vcl {
+	import re2 from "${vmod_topbuild}/src/.libs/libvmod_re2.so";
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_init {
+	        new good = re2.regex("\b \B", posix_syntax=true,
+		                     word_boundary=true);
+	}
+}