add fs and try_files tests

Signed-off-by: Mohammed Al Sahaf <msaa1990@gmail.com>

caddytest/spec/http/fs/spec.hurl

@@ -0,0 +1,95 @@
+# Spec: fs directive — selects which named filesystem to use for file_server etc.
+# Only the "default" (OS) filesystem is available without external plugins.
+# These tests verify the directive parses, is applied conditionally, and does
+# not interfere with file_server resolving files from the configured root.
+
+# Configure Caddy with explicit default filesystem
+POST http://localhost:2019/load
+Content-Type: text/caddyfile
+```
+{
+	skip_install_trust
+	http_port     9080
+	https_port    9443
+	local_certs
+}
+localhost {
+	root * {{indexed_root}}
+	fs default
+	file_server
+}
+```
+HTTP 200
+
+# PROPERTY: `fs default` selects the OS-backed filesystem and serves files normally
+GET https://localhost:9443/index.txt
+[Options]
+insecure: true
+HTTP 200
+[Asserts]
+body == "index.txt"
+
+
+# PROPERTY: default filesystem honors index files for directory requests
+GET https://localhost:9443/
+[Options]
+insecure: true
+HTTP 200
+[Asserts]
+header "Content-Type" contains "text/html"
+body contains "Index.html"
+
+
+# Configure Caddy with `fs` applied conditionally via named matcher
+POST http://localhost:2019/load
+Content-Type: text/caddyfile
+```
+{
+	skip_install_trust
+	http_port     9080
+	https_port    9443
+	local_certs
+}
+localhost {
+	root * {{indexed_root}}
+	@indexed path /indexed/*
+	fs @indexed default
+	file_server
+}
+```
+HTTP 200
+
+# PROPERTY: matcher-scoped `fs` does not break unrelated paths
+GET https://localhost:9443/index.txt
+[Options]
+insecure: true
+HTTP 200
+[Asserts]
+body == "index.txt"
+
+
+# Configure Caddy with fs and browse listing
+POST http://localhost:2019/load
+Content-Type: text/caddyfile
+```
+{
+	skip_install_trust
+	http_port     9080
+	https_port    9443
+	local_certs
+}
+localhost {
+	root * {{unindexed_root}}
+	fs default
+	file_server browse
+}
+```
+HTTP 200
+
+# PROPERTY: fs default works with file_server browse (directory listing fallback)
+GET https://localhost:9443/
+[Options]
+insecure: true
+HTTP 200
+[Asserts]
+header "Content-Type" contains "text/html"

caddytest/spec/http/try_files/spec.hurl

@@ -0,0 +1,117 @@
+# Configure Caddy with try_files directive
+POST http://localhost:2019/load
+Content-Type: text/caddyfile
+```
+{
+	skip_install_trust
+	http_port     9080
+	https_port    9443
+	local_certs
+}
+localhost {
+	root * {{indexed_root}}
+	try_files {path} {path}.txt {path}/index.html
+	file_server
+}
+```
+
+# try_files tries the original path first
+GET https://localhost:9443/index.txt
+[Options]
+insecure: true
+HTTP 200
+[Asserts]
+body == "index.txt"
+
+
+# try_files falls through to next option if first doesn't exist
+GET https://localhost:9443/index
+[Options]
+insecure: true
+HTTP 200
+[Asserts]
+body == "index.txt"
+
+
+# try_files falls through to directory index when the directory exists
+GET https://localhost:9443/
+[Options]
+insecure: true
+HTTP 200
+[Asserts]
+body contains "Index.html"
+
+
+# Configure Caddy with try_files and final fallback
+POST http://localhost:2019/load
+Content-Type: text/caddyfile
+```
+{
+	skip_install_trust
+	http_port     9080
+	https_port    9443
+	local_certs
+}
+localhost {
+	root * {{indexed_root}}
+	try_files {path} /index.html
+	file_server
+}
+```
+
+# try_files uses final fallback when nothing matches
+GET https://localhost:9443/does-not-exist
+[Options]
+insecure: true
+HTTP 200
+[Asserts]
+body contains "Index.html"
+
+
+# Configure Caddy with try_files policy
+POST http://localhost:2019/load
+Content-Type: text/caddyfile
+```
+{
+	skip_install_trust
+	http_port     9080
+	https_port    9443
+	local_certs
+}
+localhost {
+	root * {{indexed_root}}
+	try_files {path} {path}/ =404
+}
+```
+
+# try_files with =404 returns 404 when no files match
+GET https://localhost:9443/nonexistent
+[Options]
+insecure: true
+HTTP 404
+
+
+# Configure Caddy with try_files and query parameters
+POST http://localhost:2019/load
+Content-Type: text/caddyfile
+```
+{
+	skip_install_trust
+	http_port     9080
+	https_port    9443
+	local_certs
+}
+localhost {
+	root * {{indexed_root}}
+	try_files {path} /index.html
+	file_server
+}
+```
+
+# try_files preserves query parameters
+GET https://localhost:9443/missing?param=value
+[Options]
+insecure: true
+HTTP 200
+[Asserts]
+body contains "Index.html"