Fix and add unit tests

Author: tamasvajk

csharp/autobuilder/Semmle.Autobuild.CSharp.Tests/BuildScripts.cs

@@ -558,6 +558,8 @@ public void TestVcVarsAllBatFiles()
         [Fact]
         public void TestLinuxBuildlessExtractionSuccess()
         {
+            actions.RunProcess["dotnet --info"] = 0;
+            actions.RunProcessOut["dotnet --info"] = "";
             actions.RunProcess[@"C:\codeql\csharp/tools/linux64/Semmle.Extraction.CSharp.Standalone"] = 0;
             actions.FileExists["csharp.log"] = true;
             actions.GetEnvironmentVariable["CODEQL_EXTRACTOR_CSHARP_TRAP_DIR"] = "";
@@ -567,12 +569,14 @@ public void TestLinuxBuildlessExtractionSuccess()
             actions.EnumerateDirectories[@"C:\Project"] = "";
 
             var autobuilder = CreateAutoBuilder(false, buildless: "true");
-            TestAutobuilderScript(autobuilder, 0, 1);
+            TestAutobuilderScript(autobuilder, 0, 2);
         }
 
         [Fact]
         public void TestLinuxBuildlessExtractionFailed()
         {
+            actions.RunProcess["dotnet --info"] = 0;
+            actions.RunProcessOut["dotnet --info"] = "";
             actions.RunProcess[@"C:\codeql\csharp/tools/linux64/Semmle.Extraction.CSharp.Standalone"] = 10;
             actions.FileExists["csharp.log"] = true;
             actions.GetEnvironmentVariable["CODEQL_EXTRACTOR_CSHARP_TRAP_DIR"] = "";
@@ -582,12 +586,14 @@ public void TestLinuxBuildlessExtractionFailed()
             actions.EnumerateDirectories[@"C:\Project"] = "";
 
             var autobuilder = CreateAutoBuilder(false, buildless: "true");
-            TestAutobuilderScript(autobuilder, 10, 1);
+            TestAutobuilderScript(autobuilder, 10, 2);
         }
 
         [Fact]
         public void TestLinuxBuildlessExtractionSolution()
         {
+            actions.RunProcess["dotnet --info"] = 0;
+            actions.RunProcessOut["dotnet --info"] = "";
             actions.RunProcess[@"C:\codeql\csharp/tools/linux64/Semmle.Extraction.CSharp.Standalone"] = 0;
             actions.FileExists["csharp.log"] = true;
             actions.GetEnvironmentVariable["CODEQL_EXTRACTOR_CSHARP_TRAP_DIR"] = "";
@@ -597,7 +603,30 @@ public void TestLinuxBuildlessExtractionSolution()
             actions.EnumerateDirectories[@"C:\Project"] = "";
 
             var autobuilder = CreateAutoBuilder(false, buildless: "true");
-            TestAutobuilderScript(autobuilder, 0, 1);
+            TestAutobuilderScript(autobuilder, 0, 2);
+        }
+
+        [Fact]
+        public void TestLinuxBuildlessExtractionNoDotnet()
+        {
+            actions.RunProcess["dotnet --info"] = 1;
+            actions.RunProcessOut["dotnet --info"] = "";
+            actions.RunProcess["dotnet --list-sdks"] = 1;
+            actions.RunProcessOut["dotnet --list-sdks"] = "";
+            actions.RunProcess[@"chmod u+x scratch/.dotnet/dotnet-install.sh"] = 0;
+            actions.RunProcess[@"scratch/.dotnet/dotnet-install.sh --channel release --version 8.0.101 --install-dir scratch/.dotnet"] = 0;
+            actions.RunProcess[@"C:\codeql\csharp/tools/linux64/Semmle.Extraction.CSharp.Standalone --dotnet scratch/.dotnet"] = 0;
+            actions.FileExists["csharp.log"] = true;
+            actions.GetEnvironmentVariable["CODEQL_EXTRACTOR_CSHARP_TRAP_DIR"] = "";
+            actions.GetEnvironmentVariable["CODEQL_EXTRACTOR_CSHARP_SOURCE_ARCHIVE_DIR"] = "";
+            actions.GetEnvironmentVariable["CODEQL_EXTRACTOR_CSHARP_SCRATCH_DIR"] = "scratch";
+            actions.EnumerateFiles[@"C:\Project"] = "foo.cs\ntest.sln";
+            actions.EnumerateDirectories[@"C:\Project"] = "";
+            actions.DownloadFiles.Add(("https://dot.net/v1/dotnet-install.sh", "scratch/.dotnet/dotnet-install.sh"));
+            actions.CreateDirectories.Add(@"scratch/.dotnet");
+
+            var autobuilder = CreateAutoBuilder(false, buildless: "true");
+            TestAutobuilderScript(autobuilder, 0, 5);
         }
 
         private void SkipVsWhere()
@@ -888,6 +917,8 @@ public void TestSkipNugetMsBuild()
         [Fact]
         public void TestSkipNugetBuildless()
         {
+            actions.RunProcess["dotnet --info"] = 0;
+            actions.RunProcessOut["dotnet --info"] = "";
             actions.RunProcess[@"C:\codeql\csharp/tools/linux64/Semmle.Extraction.CSharp.Standalone"] = 0;
             actions.FileExists["csharp.log"] = true;
             actions.GetEnvironmentVariable["CODEQL_EXTRACTOR_CSHARP_TRAP_DIR"] = "";
@@ -897,7 +928,7 @@ public void TestSkipNugetBuildless()
             actions.EnumerateDirectories[@"C:\Project"] = "";
 
             var autobuilder = CreateAutoBuilder(false, buildless: "true");
-            TestAutobuilderScript(autobuilder, 0, 1);
+            TestAutobuilderScript(autobuilder, 0, 2);
         }