Add LoadSceneAttribute

[nowsprinting]

LoadSceneAttribute is an NUnit test attribute class to load scene before running test.

It has the following benefits:

• Can be used when running play mode tests in-editor and on-player
• Can be specified scenes that are not in "Scenes in Build"

This attribute can attached to test method only.

Usage:

using System;
using NUnit.Framework;
using TestHelper.Attributes;

[TestFixture]
public class MyTestClass
{
    [Test]
    [LoadScene("Assets/MyTests/Scenes/Scene.unity")]
    public void MyTestMethod()
    {
        var cube = GameObject.Find("Cube");
        Assert.That(cube, Is.Not.Null);
    }
}

Note

• Load scene run after OneTimeSetUp and before SetUp
• Scene file path is starts with Assets/ or Packages/.
  And package name using name instead of displayName, when scenes in the package.
  (e.g., Packages/com.nowsprinting.test-helper/Tests/Scenes/Scene.unity)

[github-actions]

Code Metrics Report

	master (d3e274e)	#13 (60d35e6)	+/-
Coverage	47.6%	49.5%	+1.9%
Code to Test Ratio	1:0.8	1:0.8	+0.0
Test Execution Time	4m5s	4m50s	+45s

Details

  |                     | master (d3e274e) | #13 (60d35e6) |  +/-  |
  |---------------------|------------------|---------------|-------|
+ | Coverage            |            47.6% |         49.5% | +1.9% |
  |   Files             |               14 |            16 |    +2 |
  |   Lines             |              330 |           404 |   +74 |
+ |   Covered           |              157 |           200 |   +43 |
+ | Code to Test Ratio  |            1:0.8 |         1:0.8 |  +0.0 |
  |   Code              |              614 |           738 |  +124 |
+ |   Test              |              487 |           609 |  +122 |
- | Test Execution Time |             4m5s |         4m50s |  +45s |

Code coverage of files in pull request scope (0.0% → 58.1%)

Files	Coverage	+/-
Editor/TemporaryBuildScenesUsingInTest.cs	43.6%	+43.6%
Runtime/Attributes/LoadSceneAttribute.cs	100.0%	+100.0%

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Reported by octocov