v0.2.14-pre.004

crates/ksp-program-api/tests/public_api.rs

@@ -1,5 +1,5 @@
 // file: crates/ksp-program-api/tests/public_api.rs
-// version: 2
+// version: 3
 
 //! Integration canaries for the public `ksp-program-api` foundation.
 
@@ -47,3 +47,31 @@ fn public_pre_003_recognition_and_decode_outcome_are_available_from_crate_root()
     assert_eq!(std::format!("{unsupported:?}"), "Unsupported");
     return;
 }
+
+#[test]
+fn public_pre_004_instruction_decoder_trait_is_available_from_crate_root() {
+    let decoder = NeverInstantiatedDecoder;
+    assert!(ksp_program_api::ProgramInstructionDecoder::program_ids(&decoder).is_empty());
+    return;
+}
+
+struct NeverInstantiatedDecoder;
+
+impl ksp_program_api::ProgramInstructionDecoder for NeverInstantiatedDecoder {
+    type Decoded = u8;
+
+    fn program_ids(&self) -> &[ksp_program_api::Pubkey] {
+        return &[];
+    }
+
+    fn recognize(&self, _instruction: &ksp_program_api::ProgramInstruction) -> ksp_program_api::ProgramInstructionRecognition {
+        return ksp_program_api::ProgramInstructionRecognition::NoMatch;
+    }
+
+    fn decode(
+        &self,
+        _instruction: &ksp_program_api::ProgramInstruction,
+    ) -> ksp_program_api::Result<ksp_program_api::ProgramInstructionDecodeOutcome<Self::Decoded>> {
+        return std::result::Result::Ok(ksp_program_api::ProgramInstructionDecodeOutcome::Unsupported);
+    }
+}