[CICD-761] Add additional cases for generated exclude from rules

Tests how different REMOTE_PATHS affect the generated exclude
rule output.

tests/fixtures/excludes/exclude_from_mu_plugins.txt

@@ -0,0 +1,34 @@
+# Version Control
+*~
+.git
+.github
+.gitignore
+.DS_Store
+.svn
+.cvs
+*.bak
+*.swp
+Thumbs.db
+
+# WordPress specific files
+wp-config.php
+
+# WP Engine specific files and directories
+.smushit-status
+.gitattributes
+.wpe-devkit/
+.wpengine-conf/
+_wpeprivate
+
+### Dynamic mu-plugin file and directory exclusions
+/mu-plugin.php
+/slt-force-strong-passwords.php
+/wpengine-security-auditor.php
+/stop-long-comments.php
+/force-strong-passwords*
+/wpengine-common*
+/wpe-wp-sign-on-plugin*
+/wpe-elasticpress-autosuggest-logger*
+/wpe-cache-plugin*
+/wp-cache-memcached*
+/local-by-flywheel-live-link-helper.php

tests/fixtures/excludes/exclude_from_safe_directories.txt

@@ -0,0 +1,21 @@
+# Version Control
+*~
+.git
+.github
+.gitignore
+.DS_Store
+.svn
+.cvs
+*.bak
+*.swp
+Thumbs.db
+
+# WordPress specific files
+wp-config.php
+
+# WP Engine specific files and directories
+.smushit-status
+.gitattributes
+.wpe-devkit/
+.wpengine-conf/
+_wpeprivate

tests/fixtures/excludes/exclude_from_wp_content.txt

@@ -0,0 +1,48 @@
+# Version Control
+*~
+.git
+.github
+.gitignore
+.DS_Store
+.svn
+.cvs
+*.bak
+*.swp
+Thumbs.db
+
+# WordPress specific files
+wp-config.php
+
+# WP Engine specific files and directories
+.smushit-status
+.gitattributes
+.wpe-devkit/
+.wpengine-conf/
+_wpeprivate
+
+### Dynamic file and directory exclusions
+/uploads/
+/blogs.dir/
+/upgrade/*
+/backup-db/*
+/advanced-cache.php
+/wp-cache-config.php
+/cache/*
+/cache/supercache/*
+/object-cache.php
+/drop-ins/
+/drop-ins/wp-cache-memcached*
+/mysql.sql
+
+### Dynamic mu-plugin file and directory exclusions
+/mu-plugins/mu-plugin.php
+/mu-plugins/slt-force-strong-passwords.php
+/mu-plugins/wpengine-security-auditor.php
+/mu-plugins/stop-long-comments.php
+/mu-plugins/force-strong-passwords*
+/mu-plugins/wpengine-common*
+/mu-plugins/wpe-wp-sign-on-plugin*
+/mu-plugins/wpe-elasticpress-autosuggest-logger*
+/mu-plugins/wpe-cache-plugin*
+/mu-plugins/wp-cache-memcached*
+/mu-plugins/local-by-flywheel-live-link-helper.php

tests/test_generate_path_excludes.sh

@@ -38,21 +38,33 @@ test_determine_exclude_paths() {
 }
 
 test_generate_exclude_from() {
-  export REMOTE_PATH=""
-  local output
-  local expected_output
+  run_test_generate_exclude_from() {
+    export REMOTE_PATH=$1
+    local output
+    local expected_output_file=$2
+    local expected_output
 
-  output=$(generate_exclude_from)
-  expected_output=$(cat "tests/fixtures/excludes/exclude_from.txt")
+    output=$(generate_exclude_from)
+    expected_output=$(cat "${expected_output_file}")
 
-  if [[ "$output" != "$expected_output" ]]; then
-    echo -e "${RED}Test failed': generated output does not match expected output.${NC}"
-    echo -e "${BLUE}Generated output:${NC}"
-    echo "$output"
-    echo -e "${BLUE}Expected output:${NC}"
-    echo "$expected_output"
-    exit 1
-  fi
+    if [[ "$output" != "$expected_output" ]]; then
+      echo -e "${RED}Test failed for REMOTE_PATH='${REMOTE_PATH}'': generated output does not match expected output.${NC}"
+      echo -e "${BLUE}Generated output:${NC}"
+      echo "$output"
+      echo -e "${BLUE}Expected output from ${expected_output_file}:${NC}"
+      echo "$expected_output"
+      exit 1
+    fi
+  }
+
+  run_test_generate_exclude_from "."                      "tests/fixtures/excludes/exclude_from_root.txt"
+  run_test_generate_exclude_from ""                       "tests/fixtures/excludes/exclude_from_root.txt"
+  run_test_generate_exclude_from "wp-content"             "tests/fixtures/excludes/exclude_from_wp_content.txt"
+  run_test_generate_exclude_from "wp-content/"            "tests/fixtures/excludes/exclude_from_wp_content.txt"
+  run_test_generate_exclude_from "wp-content/mu-plugins"  "tests/fixtures/excludes/exclude_from_mu_plugins.txt"
+  run_test_generate_exclude_from "wp-content/mu-plugins/" "tests/fixtures/excludes/exclude_from_mu_plugins.txt"
+  run_test_generate_exclude_from "wp-content/plugins"     "tests/fixtures/excludes/exclude_from_safe_directories.txt"
+  run_test_generate_exclude_from "wp-content/plugins/"    "tests/fixtures/excludes/exclude_from_safe_directories.txt"
 
   echo -e "${GREEN}Test passed for generating exclude-from rules: generated output matches expected output.${NC}"
 }