add tests for compile option alt_bsux

src/tests/compile_opts.vtc

@@ -199,3 +199,96 @@ client c1 {
 	expect resp.http.r2-4 == "false"
 	expect resp.http.r2-5 == "false"
 } -run
+
+# alt_bsux
+varnish v1 -vcl {
+	import pcre2 from "${vmod_topbuild}/src/.libs/libvmod_pcre2.so";
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_init {
+		new r1 = pcre2.regex("^a\x41z", alt_bsux=true);
+		new r2 = pcre2.regex("^a[m\x41]z", alt_bsux=true);
+		new r3 = pcre2.regex("^a\x1z", alt_bsux=true);
+		new r4 = pcre2.regex("^a\u0041z", alt_bsux=true);
+		new r5 = pcre2.regex("^a[m\u0041]z", alt_bsux=true);
+		new r6 = pcre2.regex("^a\u041z", alt_bsux=true);
+		new r7 = pcre2.regex("^a\U0041z", alt_bsux=true);
+		new r8 = pcre2.regex("^a\x41z");
+		new r9 = pcre2.regex("^a\x4z");
+		new r10 = pcre2.regex("^a\xz");
+		new r11 = pcre2.regex("^a\x4z", alt_bsux=true);
+		new r12 = pcre2.regex("^a\xz", alt_bsux=true);
+	}
+
+	sub vcl_recv {
+		return(synth(200));
+	}
+
+	sub vcl_synth {
+		set resp.http.r1-1 = r1.match("aAz");
+		set resp.http.r1-2 = r1.match("ax41z");
+		set resp.http.r2 = r2.match("aAz");
+		set resp.http.r3 = r3.match("ax1z");
+		set resp.http.r4-1 = r4.match("aAz");
+		set resp.http.r4-2 = r4.match("au0041z");
+		set resp.http.r5 = r5.match("aAz");
+		set resp.http.r6-1 = r6.match("au041z");
+		set resp.http.r6-2 = r6.match("aAz");
+		set resp.http.r7-1 = r7.match("aU0041z");
+		set resp.http.r7-2 = r7.match("aAz");
+		set resp.http.r8-1 = r8.match("aAz");
+		set resp.http.r8-2 = r8.match("ax41z");
+		set resp.http.r9-1 = r9.match("az");
+		set resp.http.r9-2 = r9.match("ax4z");
+		# pcre2 would match "\xz" in r10 with alt_bsux=false
+		# to binary 0 followed by z, but we cannot have a null
+		# byte in a VCL string.
+		set resp.http.r10 = r10.match("axz");
+		set resp.http.r11-1 = r11.match("az");
+		set resp.http.r11-2 = r11.match("ax4z");
+		set resp.http.r12 = r12.match("axz");
+	}
+}
+
+client c1 {
+	txreq
+	rxresp
+	expect resp.status == "200"
+	expect resp.http.r1-1 == "true"
+	expect resp.http.r1-2 == "false"
+	expect resp.http.r2 == "true"
+	expect resp.http.r3 == "true"
+	expect resp.http.r4-1 == "true"
+	expect resp.http.r4-2 == "false"
+	expect resp.http.r5 == "true"
+	expect resp.http.r6-1 == "true"
+	expect resp.http.r6-2 == "false"
+	expect resp.http.r7-1 == "true"
+	expect resp.http.r7-2 == "false"
+	expect resp.http.r8-1 == "true"
+	expect resp.http.r8-2 == "false"
+	expect resp.http.r9-1 == "true"
+	expect resp.http.r9-2 == "false"
+	expect resp.http.r10 == "false"
+	expect resp.http.r11-1 == "false"
+	expect resp.http.r11-2 == "true"
+	expect resp.http.r12 == "true"
+} -run
+
+varnish v1 -errvcl {vmod pcre2 error: Cannot compile '^a\U0041z' in r constructor: PCRE does not support \L, \l, \N{name}, \U, or \u at offset 4} {
+	import pcre2 from "${vmod_topbuild}/src/.libs/libvmod_pcre2.so";
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_init {
+		new r = pcre2.regex("^a\U0041z");
+	}
+}
+
+varnish v1 -errvcl {vmod pcre2 error: Cannot compile '^a\u0041z' in r constructor: PCRE does not support \L, \l, \N{name}, \U, or \u at offset 4} {
+	import pcre2 from "${vmod_topbuild}/src/.libs/libvmod_pcre2.so";
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_init {
+		new r = pcre2.regex("^a\u0041z");
+	}
+}