Add --nocapture flag to cargo contract test subcommand (#2037)

* Add `--nocapture` flag to `cargo contract test` subcommand

* Update changelog

Author: davidsemakula

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Support setting ABI in `Cargo.toml` and propagate ABI into build environment via `cfg` flag - [#2033](https://github.com/use-ink/cargo-contract/pull/2033)
 - Add `cargo contract test` subcommand - [#2034](https://github.com/use-ink/cargo-contract/pull/2034)
+- Add `--nocapture` flag to `cargo contract test` subcommand - [#2037](https://github.com/use-ink/cargo-contract/pull/2037)
 
 ### Fixed
 - Fixed erroneous "[lib] name" warnings - [#2035](https://github.com/use-ink/cargo-contract/pull/2035)

crates/cargo-contract/src/cmd/test_cmd.rs

@@ -38,6 +38,9 @@ pub struct TestCommand {
     all_features: bool,
     #[clap(flatten)]
     verbosity: VerbosityFlags,
+    /// Disable capturing of test output (e.g. for debugging).
+    #[clap(long)]
+    nocapture: bool,
     /// Arguments to pass to `cargo test`.
     #[arg(last = true)]
     args: Vec<String>,
@@ -55,6 +58,13 @@ impl TestCommand {
         if !self.args.is_empty() {
             args.extend(self.args.clone());
         }
+        if self.nocapture {
+            // Adds escape arg (if necessary).
+            if !self.args.iter().any(|arg| arg == "--") {
+                args.push("--".to_string());
+            }
+            args.push("--nocapture".to_string());
+        }
 
         // Composes ABI `cfg` flag.
         let mut env = Vec::new();