Feature/goland extension

[dmedovich]

Related issue

Closes #7

TL;DR

Added a GoLand extension for Testo and manually validated run/debug flows on:

• Fedora Linux 44, kernel 7.0.13-200.fc44.x86_64, GoLand 2026.1.4

The plugin is implemented on top of the IntelliJ Platform / GoLand APIs and uses native Go Test run configurations, so no OS-specific behavior is expected. macOS and Windows were not manually tested.

Summary

Adds a GoLand plugin for Testo.

The plugin provides gutter actions for running and debugging:

• a whole Testo suite from the suite caller test;
• an individual Testo suite test method.

It reuses GoLand's native Go Test run/debug configuration, so SDK handling, test output, rerun, coverage/debugger integration, and IDE behavior stay on the standard GoLand path.

What changed

• Added goland-extension Gradle project.
• Added Testo target detection for:
  • suite caller functions using testo.RunSuite;
  • suite test methods like func (s *Suite) TestSomething(...);
  • default, aliased, and dot imports of github.com/ozontech/testo;
  • suite arguments like Suite{}, &Suite{}, and new(Suite).
• Added Go Test run configuration producer and gutter line marker.
• Added unit tests for PSI target detection and run configuration generation.
• Added GoLand extension CI job.
• Updated changelog.

Validation

• ./gradlew test
• ./gradlew test buildPlugin verifyPlugin --no-daemon --no-configuration-cache
• make

Manual validation:

• Installed the built plugin ZIP into GoLand 2026.1.4 on Fedora.
• Ran examples/01_suite individual suite test from the gutter action near TestMath.
• Ran the whole examples/01_suite suite from the gutter action near testo.RunSuite(...).
• Debugged through GoLand native debugger and confirmed breakpoint hit.

Manual test steps

1. Build the plugin:

cd goland-extension
./gradlew buildPlugin

2. Install the generated zip from:

goland-extension/build/distributions/testo-goland-extension-0.1.0.zip

via Settings | Plugins | Gear icon | Install Plugin from Disk...

3. Restart Goland
4. Open examples/01_suite/main_test.go (or any other examples)
5. Run or debug Testo Suite.TestMath from gutter action near TestMath
6. Run Testo Suite from the gutter action near testo.RunSuite(...).