Add C# test examples (#397)

.devcontainer/devcontainer.json

@@ -4,11 +4,20 @@
 	"name": "Rust",
 	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
 	"image": "mcr.microsoft.com/devcontainers/rust:1-1-bullseye",
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"ms-dotnettools.csharp",
+				"ms-dotnettools.csdevkit"
+			]
+		}
+	},
 	"features": {
-		"ghcr.io/devcontainers/features/dotnet:2": {},
+		"ghcr.io/devcontainers/features/dotnet:2": {
+			"version": "8.0"
+		},
 		"ghcr.io/devcontainers/features/python:1": {}
 	}
-
 	// Use 'mounts' to make the cargo cache persistent in a Docker Volume.
 	// "mounts": [
 	// 	{

.github/workflows/test-csharp.yml

@@ -121,17 +121,12 @@ jobs:
         uses: actions/download-artifact@v4
         with:
           name: regorus-nuget
-          path: ./bindings/csharp/TestApp/regorus-nuget/
+          path: ./bindings/csharp/Regorus.Tests/regorus-nuget/
-        
-      - name: Restore Test App
-        run: dotnet restore /p:RestoreSources=./regorus-nuget/
-        working-directory: ./bindings/csharp/TestApp
 
-      - name: Build Test App 8.0
+      - name: Restore Regorus.Tests
-        run: dotnet build --framework net8.0
+        run: dotnet restore /p:RestoreAdditionalProjectSources=./regorus-nuget
-        working-directory: ./bindings/csharp/TestApp
+        working-directory: ./bindings/csharp/Regorus.Tests
 
-      - name: Run Test App 8.0
+      - name: Run Regorus.Tests
-        run: dotnet run --framework net8.0
+        run: dotnet test --no-restore
-        working-directory: ./bindings/csharp/TestApp
+        working-directory: ./bindings/csharp/Regorus.Tests
-  

.gitignore

@@ -27,5 +27,4 @@ bindings/*/target
 
 # C# build folders
 **bin
-**obj
+**obj
-*.sln

bindings/csharp/Regorus.Tests/Regorus.Tests.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <Nullable>Enable</Nullable>
+    <TargetFramework>net8.0</TargetFramework>
+    <EnableMSTestRunner>true</EnableMSTestRunner>
+    <!-- More info about dotnet test integration https://learn.microsoft.com/dotnet/core/testing/unit-testing-platform-integration-dotnet-test -->
+    <TestingPlatformDotnetTestSupport>true</TestingPlatformDotnetTestSupport>
+    <TestingPlatformShowTestsFailure>true</TestingPlatformShowTestsFailure>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Include="../../../tests/**/*.*" Link="tests/%(RecursiveDir)%(Filename)%(Extension)" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="MSTest" Version="3.8.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Regorus" Version="0.5.0"/>
+  </ItemGroup>
+</Project>

bindings/csharp/Regorus.Tests/RegorusTests.cs

@@ -0,0 +1,176 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+namespace Regorus.Tests;
+
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Text.Json.Nodes;
+
+[TestClass]
+public class RegorusTests
+{
+    [TestMethod]
+    public void Basic_evaluation_succeeds()
+    {
+        using var engine = new Engine();
+        engine.AddPolicy(
+            "test.rego",
+            "package test\nx = 1\nmessage = `Hello`");
+
+        var result = engine.EvalRule("data.test.message");
+
+        Assert.AreEqual("\"Hello\"", result);
+    }
+
+    [TestMethod]
+    public void Evaluation_using_file_policies_succeeds()
+    {
+        using var engine = new Engine();
+        engine.SetRegoV0(true);
+
+        // Load policies and data.
+        engine.AddPolicyFromFile("tests/aci/framework.rego");
+        engine.AddPolicyFromFile("tests/aci/api.rego");
+        engine.AddPolicyFromFile("tests/aci/policy.rego");
+        engine.AddDataFromJsonFile("tests/aci/data.json");
+
+        // Set input and eval rule.
+        engine.SetInputFromJsonFile("tests/aci/input.json");
+        var result = engine.EvalRule("data.framework.mount_overlay");
+
+        var expected = """
+{
+  "allowed": true,
+  "metadata": [
+    {
+      "action": "add",
+      "key": "container0",
+      "name": "matches",
+      "value": [
+        {
+          "allow_elevated": true,
+          "allow_stdio_access": false,
+          "capabilities": {
+            "ambient": [
+              "CAP_SYS_ADMIN"
+            ],
+            "bounding": [
+              "CAP_SYS_ADMIN"
+            ],
+            "effective": [
+              "CAP_SYS_ADMIN"
+            ],
+            "inheritable": [
+              "CAP_SYS_ADMIN"
+            ],
+            "permitted": [
+              "CAP_SYS_ADMIN"
+            ]
+          },
+          "command": [
+            "rustc",
+            "--help"
+          ],
+          "env_rules": [
+            {
+              "pattern": "PATH=/usr/local/cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+              "required": true,
+              "strategy": "string"
+            },
+            {
+              "pattern": "RUSTUP_HOME=/usr/local/rustup",
+              "required": true,
+              "strategy": "string"
+            },
+            {
+              "pattern": "CARGO_HOME=/usr/local/cargo",
+              "required": true,
+              "strategy": "string"
+            },
+            {
+              "pattern": "RUST_VERSION=1.52.1",
+              "required": true,
+              "strategy": "string"
+            },
+            {
+              "pattern": "TERM=xterm",
+              "required": false,
+              "strategy": "string"
+            },
+            {
+              "pattern": "PREFIX_.+=.+",
+              "required": false,
+              "strategy": "re2"
+            }
+          ],
+          "exec_processes": [
+            {
+              "command": [
+                "top"
+              ],
+              "signals": []
+            }
+          ],
+          "layers": [
+            "fe84c9d5bfddd07a2624d00333cf13c1a9c941f3a261f13ead44fc6a93bc0e7a",
+            "4dedae42847c704da891a28c25d32201a1ae440bce2aecccfa8e6f03b97a6a6c",
+            "41d64cdeb347bf236b4c13b7403b633ff11f1cf94dbc7cf881a44d6da88c5156",
+            "eb36921e1f82af46dfe248ef8f1b3afb6a5230a64181d960d10237a08cd73c79",
+            "e769d7487cc314d3ee748a4440805317c19262c7acd2fdbdb0d47d2e4613a15c",
+            "1b80f120dbd88e4355d6241b519c3e25290215c469516b49dece9cf07175a766"
+          ],
+          "mounts": [
+            {
+              "destination": "/container/path/one",
+              "options": [
+                "rbind",
+                "rshared",
+                "rw"
+              ],
+              "source": "sandbox:///host/path/one",
+              "type": "bind"
+            },
+            {
+              "destination": "/container/path/two",
+              "options": [
+                "rbind",
+                "rshared",
+                "ro"
+              ],
+              "source": "sandbox:///host/path/two",
+              "type": "bind"
+            }
+          ],
+          "no_new_privileges": true,
+          "seccomp_profile_sha256": "",
+          "signals": [],
+          "user": {
+            "group_idnames": [
+              {
+                "pattern": "",
+                "strategy": "any"
+              }
+            ],
+            "umask": "0022",
+            "user_idname": {
+              "pattern": "",
+              "strategy": "any"
+            }
+          },
+          "working_dir": "/home/user"
+        }
+      ]
+    },
+    {
+      "action": "add",
+      "key": "/run/gcs/c/container0/rootfs",
+      "name": "overlayTargets",
+      "value": true
+    }
+  ]
+}
+""";
+
+        Assert.IsTrue(JsonNode.DeepEquals(JsonNode.Parse(expected), JsonNode.Parse(result!)), $"Actual: {result}");
+    }
+}

bindings/csharp/global.json

@@ -4,7 +4,7 @@
     },
     "sdk": {
       "allowPrerelease": false,
-      "version": "8.0.407",
+      "version": "8.0.408",
       "rollForward": "disable"
     }
 }