Thymeleaf 호환성 테스트 추가:

- Mvc/Form/Security/Expression 관련 템플릿 및 테스트 구현
- 의존성 검증 및 업그레이드 스크립트 추가 (Thymeleaf 3.1.5 적용)

gradle/thymeleaf-verification.init.gradle

@@ -0,0 +1,21 @@
+// ./gradlew -I gradle/thymeleaf-verification.init.gradle :thymeleafCompatibilityDependencies
+// Read-only dependency resolution; does not override versions or the normal build.
+gradle.projectsEvaluated {
+    def portal = gradle.rootProject
+    portal.tasks.register('thymeleafCompatibilityDependencies') {
+        doLast {
+            def output = new File(portal.buildDir, 'reports/thymeleaf-compatibility')
+            output.mkdirs()
+            ['runtimeClasspath', 'testRuntimeClasspath'].each { name ->
+                def artifacts = portal.configurations.getByName(name).resolvedConfiguration.resolvedArtifacts
+                def rows = artifacts.findAll {
+                    it.id.componentIdentifier instanceof org.gradle.api.artifacts.component.ModuleComponentIdentifier
+                }.collect {
+                    "${it.moduleVersion.id.group}:${it.name}\t${it.moduleVersion.id.version}\t${it.file.name}"
+                }.sort()
+                new File(output, "${name}.tsv").text = rows.join('\n') + '\n'
+            }
+            println "Dependency evidence: ${output}"
+        }
+    }
+}

gradle/verify-thymeleaf-artifacts.py

@@ -0,0 +1,113 @@
+#!/usr/bin/env python3
+"""Compare resolved dependency TSVs and inspect both WARs; exits nonzero on regression."""
+import argparse
+import hashlib
+import io
+import json
+from pathlib import Path
+import re
+import zipfile
+
+
+EXPECTED_CHANGES = {
+    "org.thymeleaf:thymeleaf": ("3.1.4.RELEASE", "3.1.5.RELEASE"),
+    "org.thymeleaf:thymeleaf-spring5": ("3.1.4.RELEASE", "3.1.5.RELEASE"),
+    "ognl:ognl": ("3.3.4", "3.3.5"),
+}
+EXPECTED_CLASSES = {
+    "org/thymeleaf/TemplateEngine.class": "thymeleaf-3.1.5.RELEASE.jar",
+    "org/thymeleaf/spring5/SpringTemplateEngine.class": "thymeleaf-spring5-3.1.5.RELEASE.jar",
+    "ognl/Ognl.class": "ognl-3.3.5.jar",
+}
+LOCAL_PREFIXES = (
+    "spring-boot-devtools", "spring-boot-starter-actuator", "spring-boot-actuator",
+    "micrometer-", "spring-boot-admin-", "tomcat-embed-websocket-",
+)
+
+
+def require(condition, message):
+    if not condition:
+        raise ValueError(message)
+
+
+def dependencies(path):
+    result = {}
+    for line in path.read_text().splitlines():
+        module, version, filename = line.split("\t")
+        entries = result.setdefault(module, [])
+        require((version, filename) not in entries, "Duplicate artifact: " + filename)
+        require(not entries or entries[0][0] == version, "Multiple versions: " + module)
+        entries.append((version, filename))
+    for entries in result.values():
+        entries.sort()
+    return result
+
+
+def compare(before, after):
+    old, new = dependencies(before), dependencies(after)
+    require(old.keys() == new.keys(), "Added/removed external modules: " + str(old.keys() ^ new.keys()))
+    changed = {key: (old[key][0][0], new[key][0][0]) for key in old if old[key] != new[key]}
+    require(changed == EXPECTED_CHANGES, "Unexpected dependency changes: " + str(changed))
+    return {"external_modules": len(new), "changes": changed}
+
+
+def inspect_war(path):
+    owners = {name: [] for name in EXPECTED_CLASSES}
+    with zipfile.ZipFile(path) as war:
+        names = war.namelist()
+        require(len(names) == len(set(names)), "Duplicate ZIP entries: " + str(path))
+        jars = sorted(name for name in names if name.endswith(".jar"))
+        basenames = [Path(name).name for name in jars]
+        require(len(basenames) == len(set(basenames)), "Duplicate JAR names: " + str(path))
+        require(not any(Path(name).name.startswith("application-local") and name.endswith(".yml")
+                        for name in names), "Local profile packaged: " + str(path))
+        for name in jars:
+            basename = Path(name).name
+            require(not basename.startswith(LOCAL_PREFIXES), "Excluded library packaged: " + name)
+            require(not re.match(r"spring-[\w-]+-6\.", basename), "Spring 6 packaged: " + name)
+            with zipfile.ZipFile(io.BytesIO(war.read(name))) as jar:
+                classes = set(jar.namelist())
+                require(not any(c.startswith("jakarta/servlet/") for c in classes),
+                        "Jakarta Servlet classes packaged: " + name)
+                for target in owners:
+                    if target in classes:
+                        owners[target].append(name)
+                        # Java 8 compatibility of each upgraded library's entry class.
+                        require(int.from_bytes(jar.read(target)[6:8], "big") <= 52,
+                                "Java >8 class: " + name + "!" + target)
+        for target, expected in EXPECTED_CLASSES.items():
+            require(owners[target] == ["WEB-INF/lib/" + expected],
+                    "Wrong/duplicate class provider: " + target + " " + str(owners[target]))
+        for pattern, expected in [
+            (r"thymeleaf-\d", "thymeleaf-3.1.5.RELEASE.jar"),
+            (r"thymeleaf-spring\d-", "thymeleaf-spring5-3.1.5.RELEASE.jar"),
+            (r"ognl-", "ognl-3.3.5.jar"),
+        ]:
+            require([n for n in basenames if re.match(pattern, n)] == [expected],
+                    "Wrong/duplicate library version for " + expected)
+    return {"file": path.name, "sha256": hashlib.sha256(path.read_bytes()).hexdigest(),
+            "jar_count": len(jars), "class_providers": owners, "jars": jars}
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--baseline", type=Path, required=True, help="Directory of baseline dependency TSVs")
+    parser.add_argument("--current", type=Path, required=True, help="Directory of current dependency TSVs")
+    parser.add_argument("--war", type=Path, action="append", required=True)
+    parser.add_argument("--output", type=Path, required=True)
+    args = parser.parse_args()
+    require(len(args.war) == 2 and len(set(args.war)) == 2, "Provide the standard WAR and bootWar")
+    result = {
+        "dependencies": {name: compare(args.baseline / (name + ".tsv"), args.current / (name + ".tsv"))
+                         for name in ["runtimeClasspath", "testRuntimeClasspath"]},
+        "wars": [inspect_war(path) for path in args.war],
+    }
+    args.output.parent.mkdir(parents=True, exist_ok=True)
+    args.output.write_text(json.dumps(result, indent=2, ensure_ascii=False) + "\n")
+    print("PASS: dependency changes limited to three modules; both WARs verified")
+    for war in result["wars"]:
+        print(war["file"], war["sha256"])
+
+
+if __name__ == "__main__":
+    main()