C#: Add assets parsing unit test.

Author: michaelnebel

csharp/extractor/Semmle.Extraction.Tests/Assets.cs

@@ -0,0 +1,187 @@
+using Xunit;
+using System.Linq;
+using Semmle.Extraction.CSharp.DependencyFetching;
+
+namespace Semmle.Extraction.Tests
+{
+    public class AssetsTests
+    {
+        private static string FixExpectedPathOnWindows(string path) => path.Replace('\\', '/');
+
+        [Fact]
+        public void TestAssets1()
+        {
+            // Setup
+            var assets = new Assets(new ProgressMonitor(new LoggerStub()));
+            var json = assetsJson1;
+
+            // Execute
+            var success = assets.TryParse(json, out var dependencies);
+
+            // Verify
+            Assert.True(success);
+            Assert.Equal(4, dependencies.Count());
+
+            var normalizedPaths = dependencies.Select(FixExpectedPathOnWindows);
+            // Packages references
+            Assert.Contains("castle.core/4.4.1/lib/netstandard1.5/Castle.Core.dll", normalizedPaths);
+            Assert.Contains("json.net/1.0.33/lib/netstandard2.0/Json.Net.dll", normalizedPaths);
+            Assert.Contains("microsoft.aspnetcore.cryptography.internal/6.0.8/lib/net6.0/Microsoft.AspNetCore.Cryptography.Internal.dll", normalizedPaths);
+            Assert.Contains("humanizer.core/2.8.26/lib/netstandard2.0", normalizedPaths);
+        }
+
+        [Fact]
+        public void TestAssets2()
+        {
+            // Setup
+            var assets = new Assets(new ProgressMonitor(new LoggerStub()));
+            var json = assetsJson2;
+
+            // Execute
+            var success = assets.TryParse(json, out var dependencies);
+
+            // Verify
+            Assert.True(success);
+            Assert.Equal(2, dependencies.Count());
+            Assert.Contains("microsoft.netframework.referenceassemblies/1.0.3", dependencies);
+            Assert.Contains("microsoft.netframework.referenceassemblies.net48/1.0.3", dependencies);
+        }
+
+        [Fact]
+        public void TestAssets3()
+        {
+            // Setup
+            var assets = new Assets(new ProgressMonitor(new LoggerStub()));
+            var json = "garbage data";
+
+            // Execute
+            var success = assets.TryParse(json, out var dependencies);
+
+            // Verify
+            Assert.False(success);
+            Assert.Empty(dependencies);
+        }
+
+        private readonly string assetsJson1 = """
+{
+    "version": 3,
+    "targets": {
+        "net7.0": {
+            "Castle.Core/4.4.1": {
+                "type": "package",
+                "dependencies": {
+                    "NETStandard.Library": "1.6.1",
+                    "System.Collections.Specialized": "4.3.0",
+                },
+                "compile": {
+                    "lib/netstandard1.5/Castle.Core.dll": {
+                        "related": ".xml"
+                    }
+                },
+                "runtime": {
+                    "lib/netstandard1.5/Castle.Core.dll": {
+                        "related": ".xml"
+                    }
+                }
+            },
+            "Json.Net/1.0.33": {
+                "type": "package",
+                "compile": {
+                     "lib/netstandard2.0/Json.Net.dll": {}
+                },
+                "runtime": {
+                    "lib/netstandard2.0/Json.Net.dll": {}
+                }
+            },
+            "MessagePackAnalyzer/2.1.152": {
+                "type": "package"
+            },
+            "Microsoft.AspNetCore.Cryptography.Internal/6.0.8": {
+                "type": "package",
+                "compile": {
+                    "lib/net6.0/Microsoft.AspNetCore.Cryptography.Internal.dll": {
+                        "related": ".xml"
+                    }
+                },
+                "runtime": {
+                    "lib/net6.0/Microsoft.AspNetCore.Cryptography.Internal.dll": {
+                        "related": ".xml"
+                    }
+                }
+            },
+            "Humanizer.Core/2.8.26": {
+                "type": "package",
+                "compile": {
+                    "lib/netstandard2.0/_._": {
+                        "related": ".xml"
+                    }
+                },
+                "runtime": {
+                    "lib/netstandard2.0/Humanizer.dll": {
+                        "related": ".xml"
+                    }
+                }
+            },
+            "Nop.Core/4.5.0": {
+                "type": "project",
+                "compile": {
+                    "bin/placeholder/Nop.Core.dll": {}
+                },
+                "runtime": {
+                    "bin/placeholder/Nop.Core.dll": {}
+                }
+            },
+        }
+    },
+    "project": {
+        "version": "1.0.0",
+        "frameworks": {
+            "net7.0": {
+                "targetAlias": "net7.0",
+                "downloadDependencies": [
+                    {
+                        "name": "Microsoft.AspNetCore.App.Ref",
+                        "version": "[7.0.2, 7.0.2]"
+                    },
+                    {
+                        "name": "Microsoft.NETCore.App.Ref",
+                        "version": "[7.0.2, 7.0.2]"
+                    }
+                ],
+                "frameworkReferences": {
+                    "Microsoft.AspNetCore.App": {
+                        "privateAssets": "none"
+                    },
+                    "Microsoft.NETCore.App": {
+                        "privateAssets": "all"
+                    }
+                }
+            }
+        }
+    }
+}
+""";
+
+        private readonly string assetsJson2 = """
+{
+    "version": 3,
+    "targets": {
+        ".NETFramework,Version=v4.8": {
+            "Microsoft.NETFramework.ReferenceAssemblies/1.0.3": {
+                "type": "package",
+                "dependencies": {
+                    "Microsoft.NETFramework.ReferenceAssemblies.net48": "1.0.3"
+                }
+            },
+            "Microsoft.NETFramework.ReferenceAssemblies.net48/1.0.3": {
+                "type": "package",
+                "build": {
+                    "build/Microsoft.NETFramework.ReferenceAssemblies.net48.targets": {}
+                }
+            }
+        }
+    }
+}
+""";
+    }
+}