Add BuildSceneAttribute and SceneManagerHelper.LoadSceneAsync method

[nowsprinting]

Add BuildSceneAttribute and SceneManagerHelper.LoadSceneAsync method.

The intended use cases:

• It needs to be set up before the load scene
• load other scenes in the test

Usage:

using NUnit.Framework;
using TestHelper.Attributes;
using TestHelper.RuntimeInternals;
using UnityEngine;

[TestFixture]
public class MyTestClass
{
    [Test]
    [BuildScene("../../Scenes/SampleScene.unity")]
    public void MyTestMethod()
    {
        // Setup before load scene

        // Load scene
        await SceneManagerHelper.LoadSceneAsync("../../Scenes/SampleScene.unity");

        // Excercise the test
    }
}

Changes

• Add BuildSceneAttribute. and LoadSceneAttribute inherits it.
• Mod extract LoadSceneAsync method to SceneManagerHelper class (rename from ScenePathFinder).

[github-actions]

Code Metrics Report

	master (5519b78)	#73 (e3e8fe5)	+/-
Coverage	70.8%	71.5%	+0.7%
Code to Test Ratio	1:0.9	1:0.9	+0.0

Details

  |                    | master (5519b78) | #73 (e3e8fe5) |  +/-  |
  |--------------------|------------------|---------------|-------|
+ | Coverage           |            70.8% |         71.5% | +0.7% |
  |   Files            |               25 |            26 |    +1 |
  |   Lines            |              637 |           617 |   -20 |
- |   Covered          |              451 |           441 |   -10 |
+ | Code to Test Ratio |            1:0.9 |         1:0.9 |  +0.0 |
  |   Code             |             1190 |          1211 |   +21 |
+ |   Test             |             1117 |          1141 |   +24 |

Code coverage of files in pull request scope (64.7% → 81.2%)

Files	Coverage	+/-
Editor/TemporaryBuildScenesUsingInTest.cs	30.0%	-13.9%
Runtime/Attributes/BuildSceneAttribute.cs	100.0%	+100.0%
Runtime/Attributes/LoadSceneAttribute.cs	100.0%	+8.9%
RuntimeInternals/SceneManagerHelper.cs	93.2%	+93.2%

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Reported by octocov