chore(rust/signed-doc): Refactor catalyst-signed-doc tests, move most of the rules unit tests into the separate tests.rs files (#580)

* wip

* wip

* wip

* fix

* wip

* wip

Author: Mr-Leshiy

rust/signed_doc/src/validator/rules/collaborators.rs

@@ -0,0 +1,57 @@
+//! `collaborators` rule type impl.
+
+#[cfg(test)]
+mod tests;
+
+use crate::CatalystSignedDocument;
+
+/// `collaborators` field validation rule
+#[derive(Debug)]
+pub(crate) enum CollaboratorsRule {
+    /// Is 'collaborators' specified
+    #[allow(dead_code)]
+    Specified {
+        /// optional flag for the `collaborators` field
+        optional: bool,
+    },
+    /// 'collaborators' is not specified
+    NotSpecified,
+}
+
+impl CollaboratorsRule {
+    /// Field validation rule
+    #[allow(clippy::unused_async)]
+    pub(crate) async fn check(
+        &self,
+        doc: &CatalystSignedDocument,
+    ) -> anyhow::Result<bool> {
+        if let Self::Specified { optional } = self {
+            if doc.doc_meta().collaborators().is_empty() && !optional {
+                doc.report().missing_field(
+                    "collaborators",
+                    "Document must have at least one entry in 'collaborators' field",
+                );
+                return Ok(false);
+            }
+        }
+        if let Self::NotSpecified = self {
+            if !doc.doc_meta().collaborators().is_empty() {
+                doc.report().unknown_field(
+                    "collaborators",
+                    &format!(
+                        "{:#?}",
+                        doc.doc_meta()
+                            .collaborators()
+                            .iter()
+                            .map(ToString::to_string)
+                            .reduce(|a, b| format!("{a}, {b}"))
+                    ),
+                    "Document does not expect to have a 'collaborators' field",
+                );
+                return Ok(false);
+            }
+        }
+
+        Ok(true)
+    }
+}

rust/signed_doc/src/validator/rules/collaborators/mod.rs

@@ -0,0 +1,96 @@
+use catalyst_types::catalyst_id::role_index::RoleId;
+use test_case::test_case;
+
+use super::*;
+use crate::{
+    builder::tests::Builder, metadata::SupportedField,
+    validator::rules::utils::create_dummy_key_pair,
+};
+
+#[test_case(
+    || {
+        Builder::new()
+            .with_metadata_field(SupportedField::Collaborators(
+                    vec![create_dummy_key_pair(RoleId::Role0).2].into()
+                ))
+            .build()
+    }
+    => true
+    ;
+    "valid 'collaborators' field present"
+)]
+#[test_case(
+    || {
+        Builder::new().build()
+    }
+    => true
+    ;
+    "missing 'collaborators' field"
+)]
+#[tokio::test]
+async fn section_rule_specified_optional_test(
+    doc_gen: impl FnOnce() -> CatalystSignedDocument
+) -> bool {
+    let rule = CollaboratorsRule::Specified { optional: true };
+
+    let doc = doc_gen();
+    rule.check(&doc).await.unwrap()
+}
+
+#[test_case(
+    || {
+        Builder::new()
+            .with_metadata_field(SupportedField::Collaborators(
+                    vec![create_dummy_key_pair(RoleId::Role0).2].into()
+                ))
+            .build()
+    }
+    => true
+    ;
+    "valid 'collaborators' field present"
+)]
+#[test_case(
+    || {
+        Builder::new().build()
+    }
+    => false
+    ;
+    "missing 'collaborators' field"
+)]
+#[tokio::test]
+async fn section_rule_specified_not_optional_test(
+    doc_gen: impl FnOnce() -> CatalystSignedDocument
+) -> bool {
+    let rule = CollaboratorsRule::Specified { optional: false };
+
+    let doc = doc_gen();
+    rule.check(&doc).await.unwrap()
+}
+
+#[test_case(
+    || {
+        Builder::new().build()
+    }
+    => true
+    ;
+    "missing 'collaborators' field"
+)]
+#[test_case(
+    || {
+        Builder::new()
+            .with_metadata_field(SupportedField::Collaborators(
+                    vec![create_dummy_key_pair(RoleId::Role0).2].into()
+                ))
+            .build()
+    }
+    => false
+    ;
+    "valid 'collaborators' field present"
+)]
+#[tokio::test]
+async fn section_rule_not_specified_test(doc_gen: impl FnOnce() -> CatalystSignedDocument) -> bool {
+    let rule = CollaboratorsRule::NotSpecified;
+
+    let doc = doc_gen();
+    rule.check(&doc).await.unwrap()
+}