test: add unit/mocking tests for app job submission

Also add a CHANGELOG entry for this.

Author: mortenpi

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## UNRELEASED
+
+### Fixed
+
+* Fixed the submission of application-type jobs. (#31, #32, #33)
+
 ## Version v0.1.4 - 2023-08-21
 
 ### Fixed

test/applications.jl

@@ -22,3 +22,19 @@ end
         @test JuliaHub.application(:default, "no-such-app"; throw=false) === nothing
     end
 end
+
+TEST_SUBMIT_APPS = [
+    (:default, "Pluto", JuliaHub.DefaultApp),
+    (:package, "RegisteredPackageApp", JuliaHub.PackageApp),
+    (:user, "ExampleApp.jl", JuliaHub.UserApp),
+]
+@testset "Submit app: :$cat / $apptype" for (cat, name, apptype) in TEST_SUBMIT_APPS
+    Mocking.apply(mocking_patch) do
+        app = JuliaHub.application(cat, name)
+        @test isa(app, apptype)
+        @test app.name == name
+        j = JuliaHub.submit_job(app)
+        @test j isa JuliaHub.Job
+        @test j.status == "Completed"
+    end
+end