Added unit tests for integration of EnvRun.

Author: ravenpride

src/GitVersionCore.Tests/BuildServers/EnvRunTests.cs

@@ -0,0 +1,67 @@
+using System;
+using System.IO;
+using GitVersion;
+using GitVersionCore.Tests;
+using NUnit.Framework;
+using Shouldly;
+
+[TestFixture]
+public class EnvRunTests : TestBase
+{
+    private const string EnvVarName = "ENVRUN_DATABASE";
+    private string mFilePath;
+
+    [SetUp]
+    public void SetEnvironmentVariableForTest()
+    {
+        // set environment variable and create an empty envrun file to indicate that EnvRun is running...
+        mFilePath = Path.Combine(Path.GetTempPath(), "envrun.db");
+        Environment.SetEnvironmentVariable(EnvVarName, mFilePath, EnvironmentVariableTarget.Process);
+        File.OpenWrite(mFilePath).Dispose();
+    }
+
+    [TearDown]
+    public void ClearEnvironmentVariableForTest()
+    {
+        Environment.SetEnvironmentVariable(EnvVarName, null, EnvironmentVariableTarget.Process);
+        File.Delete(mFilePath);
+    }
+
+    [Test]
+    public void CanApplyToCurrentContext()
+    {
+        EnvRun envrun = new EnvRun();
+        bool applys = envrun.CanApplyToCurrentContext();
+        applys.ShouldBeTrue();
+    }
+
+    [Test]
+    public void CanApplyToCurrentContext_EnvironmentVariableNotSet()
+    {
+        Environment.SetEnvironmentVariable(EnvVarName, null, EnvironmentVariableTarget.Process);
+        EnvRun envrun = new EnvRun();
+        bool applys = envrun.CanApplyToCurrentContext();
+        applys.ShouldBeFalse();
+    }
+
+    [TestCase("1.2.3")]
+    [TestCase("1.2.3-rc4")]
+    public void GenerateSetVersionMessage(string fullSemVer)
+    {
+        EnvRun envrun = new EnvRun();
+        var vars = new TestableVersionVariables(fullSemVer: fullSemVer);
+        var version = envrun.GenerateSetVersionMessage(vars);
+        version.ShouldBe(fullSemVer);
+    }
+
+    [TestCase("Version", "1.2.3",     "@@envrun[set name='GitVersion_Version' value='1.2.3']")]
+    [TestCase("Version", "1.2.3-rc4", "@@envrun[set name='GitVersion_Version' value='1.2.3-rc4']")]
+    public void GenerateSetParameterMessage(string name, string value, string expected)
+    {
+        EnvRun envrun = new EnvRun();
+        var output = envrun.GenerateSetParameterMessage(name, value);
+        output.ShouldHaveSingleItem();
+        output[0].ShouldBe(expected);
+    }
+
+}