error[E0599]: no method named `write_all` found for struct `std::io::Cursor` in the current scope
   --> src/tests/poc.rs:127:16
    |
127 |     out_stream.write_all(&after_buf).unwrap();
    |                ^^^^^^^^^ method not found in `Cursor<Vec<_>>`
    |
    = help: items from traits can only be used if the trait is in scope
help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
    |
14  + use ciborium_io::Write;
    |
14  + use serde_cbor::write::Write;
    |
14  + use std::io::Write;
    |

error[E0599]: no method named `read_to_end` found for struct `std::fs::File` in the current scope
   --> src/tests/poc.rs:123:16
    |
123 |     input_file.read_to_end(&mut after_buf).unwrap();
    |                ^^^^^^^^^^^ method not found in `File`
   --> /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/io/mod.rs:819:8
    |
    = note: the method is available for `std::fs::File` here
    |
    = help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
    |
14  + use std::io::Read;
    |

error[E0599]: no method named `write_all` found for struct `std::io::Cursor` in the current scope
   --> src/tests/poc.rs:119:16
    |
119 |     out_stream.write_all(placeholder).unwrap();
    |                ^^^^^^^^^ method not found in `Cursor<Vec<_>>`
    |
    = help: items from traits can only be used if the trait is in scope
help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
    |
14  + use ciborium_io::Write;
    |
14  + use serde_cbor::write::Write;
    |
14  + use std::io::Write;
    |

error[E0599]: no method named `write_all` found for struct `std::io::Cursor` in the current scope
   --> src/tests/poc.rs:116:16
    |
116 |     out_stream.write_all(&before).unwrap();
    |                ^^^^^^^^^ method not found in `Cursor<Vec<_>>`
    |
    = help: items from traits can only be used if the trait is in scope
help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
    |
14  + use ciborium_io::Write;
    |
14  + use serde_cbor::write::Write;
    |
14  + use std::io::Write;
    |

error[E0599]: no method named `read_exact` found for struct `std::fs::File` in the current scope
   --> src/tests/poc.rs:112:16
    |
112 |     input_file.read_exact(before.as_mut_slice()).unwrap();
    |                ^^^^^^^^^^ method not found in `File`
    |
    = help: items from traits can only be used if the trait is in scope
help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
    |
14  + use ciborium_io::Read;
    |
14  + use std::io::Read;
    |

error[E0599]: no function or associated item named `from_file` found for struct `c2pa::ManifestStore` in the current scope
   --> src/tests/poc.rs:73:41
    |
73  |     let manifest_store = ManifestStore::from_file(&output).expect("from_file");
    |                                         ^^^^^^^^^ function or associated item not found in `ManifestStore`
    |
note: if you're trying to build a new `c2pa::ManifestStore` consider using one of the following associated functions:
      c2pa::ManifestStore::new
      c2pa::ManifestStore::from_store
      c2pa::ManifestStore::from_store_impl
      c2pa::ManifestStore::from_manifest
      and 3 others
   --> /home/runner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/c2pa-0.30.1/src/manifest_store.rs:47:5
    |
47  |       pub fn new() -> Self {
    |       ^^^^^^^^^^^^^^^^^^^^
...
85  |       pub(crate) fn from_store(store: &Store, validation_log: &impl StatusTracker) -> ManifestStore {
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...
105 | /     fn from_store_impl(
106 | |         store: &Store,
107 | |         validation_log: &impl StatusTracker,
108 | |         #[cfg(feature = "file_io")] resource_path: Option<&Path>,
109 | |     ) -> ManifestStore {
    | |______________________^
...
141 |       pub fn from_manifest(manifest: &Manifest) -> Result<Self> {
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0308]: mismatched types
  --> src/tests/poc.rs:52:60
   |
52 |     let offset = write_jpeg_placeholder_file(&placeholder, &ap, &mut output_file, None).unwrap();
   |                  ---------------------------               ^^^ expected `&Path`, found `&String`
   |                  |
   |                  arguments to this function are incorrect
   |
   = note: expected reference `&std::path::Path`
              found reference `&std::string::String`
note: function defined here
  --> src/tests/poc.rs:92:8
   |
92 | pub fn write_jpeg_placeholder_file(
   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
93 |     placeholder: &[u8],
94 |     input: &Path,
   |     ------------

error[E0412]: cannot find type `Hasher` in this scope
  --> src/tests/poc.rs:96:29
   |
96 |     mut hasher: Option<&mut Hasher>,
   |                             ^^^^^^ not found in this scope
   |
help: consider importing one of these items
   |
14 + use core::hash::Hasher;
   |
14 + use std::hash::Hasher;
   |