[master] 73c3a1c95 tests: Add coverage for the new vcc 'unused' directive

[Walid Boudebouda]

commit 73c3a1c957c78ec7b031bc76bb2855f1f1de35e9
Author: Walid Boudebouda <walid.boudebouda at gmail.com>
Date:   Tue Dec 2 10:02:50 2025 +0100

    tests: Add coverage for the new vcc 'unused' directive

diff --git a/bin/varnishtest/tests/v00075.vtc b/bin/varnishtest/tests/v00075.vtc
new file mode 100644
index 000000000..1aedba1e3
--- /dev/null
+++ b/bin/varnishtest/tests/v00075.vtc
@@ -0,0 +1,33 @@
+varnishtest "Test vcc 'unused' directive"
+
+
+varnish v1 -vcl {
+	backend b1 { .host = "localhost"; }
+
+	probe p1 { }
+
+	acl acl1 { "localhost"; }
+
+	sub sb {}
+
+	unused p1;
+	unused b1;
+	unused acl1;
+	unused sb;
+} -start
+
+varnish v1 -errvcl "Symbol not found: 'nonexistentsymbol'" {
+	unused nonexistentsymbol;
+}
+
+varnish v1 -errvcl "Expected ID got ';'" {
+	unused;
+}
+
+varnish v1 -errvcl "Symbol 'req' cannot follow 'unused'" {
+	unused req;
+}
+
+varnish v1 -errvcl "Symbol 'backend' cannot follow 'unused'" {
+	unused bereq.backend;
+}
\ No newline at end of file