test cases/common/123 custom target directory install/test.json

{
  "installed": [
    {"type": "file", "file": "usr/share/doc/testpkgname/html/a.html"},
    {"type": "file", "file": "usr/share/doc/testpkgname/html/b.html"},
    {"type": "file", "file": "usr/share/doc/testpkgname/html/c.html"}
  ]
}