C#: Add DependabotProxy unit-tests.

Author: michaelnebel

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

@@ -0,0 +1,185 @@
+using Xunit;
+using System;
+using System.IO;
+using Semmle.Extraction.CSharp.DependencyFetching;
+using Semmle.Util;
+
+namespace Semmle.Extraction.Tests
+{
+    public class DependabotConfigurationStub : IDependabotProxyConfiguration
+    {
+        public string? Host { get; set; }
+        public string? Port { get; set; }
+        public string? Certificate { get; set; }
+        public string? RegistryURLs { get; set; }
+    }
+
+    public class DiagnosticsWriterStub : IDiagnosticsWriter
+    {
+        public void AddEntry(Semmle.Util.DiagnosticMessage entry) { }
+        public void Dispose() { }
+    }
+
+    public class DependabotProxyTests
+    {
+        private static TemporaryDirectory MakeTemporaryDirectory()
+        {
+            var tmp = Path.Join(Path.GetTempPath(), "DependabotProxyTests", Guid.NewGuid().ToString());
+            return new TemporaryDirectory(tmp, "testing", new LoggerStub());
+        }
+
+        [Fact]
+        public void TestDependabotProxyCreation1()
+        {
+            // Setup
+            var config = new DependabotConfigurationStub
+            {
+                Host = "my.private.server",
+                Port = "",
+            };
+
+            // Execute
+            using var tempWorkingDirectory = MakeTemporaryDirectory();
+            using var proxy = DependabotProxy.MakeAux(config, new LoggerStub(), new DiagnosticsWriterStub(), tempWorkingDirectory);
+
+            // Verify
+            Assert.Null(proxy);
+        }
+
+        [Fact]
+        public void TestDependabotProxyCreation2()
+        {
+            // Setup
+            var config = new DependabotConfigurationStub
+            {
+                Port = "8080",
+            };
+
+            // Execute
+            using var tempWorkingDirectory = MakeTemporaryDirectory();
+            using var proxy = DependabotProxy.MakeAux(config, new LoggerStub(), new DiagnosticsWriterStub(), tempWorkingDirectory);
+
+            // Verify
+            Assert.Null(proxy);
+        }
+
+        private const string ExampleCertificate = """
+        -----BEGIN CERTIFICATE-----
+        MIIFJTCCAw2gAwIBAgIUDImU6YnuAqJ1QuRp+OpJQPnPu6wwDQYJKoZIhvcNAQEL
+        BQAwFDESMBAGA1UEAwwJbG9jYWxob3N0MB4XDTI2MDkwMTEyMjUzMVoXDTI3MDkw
+        MTEyMjUzMVowFDESMBAGA1UEAwwJbG9jYWxob3N0MIICIjANBgkqhkiG9w0BAQEF
+        AAOCAg8AMIICCgKCAgEAnlp7yQ1VuocMwIZWlCle3bEM86+1ED6BFfPFpIrRhfUT
+        c+5IvPng8TIZPO4mROp5G9YDZfOtXW2bwktyZNUhsBcxqUT1lmXit21vc5W9Gxx5
+        4G8nyF4/FcjFkmxkZifxiUCdBceDcE7+kx2itq/a7gLPlyTzvz5etu1nHEC3Jg/y
+        TVhAwdwysgAo9WymFCczDa2ga6nOPBOaxwLnoPl9041KSu5oIo9QC0Im+US1R18Q
+        /mXa+wkmjf+bYAkE/pZie8z8Q7h9yppTngGzkoDEebFYyaMr8MXlFdWS8f/eMwSp
+        iMFSsmlCqgUbA672APxzOcuSMMYrblzGkvZp23qbNjwQuQKlgAYBTSGltLv4U8JF
+        ePNcgDCY6RG55rNvF1gk1L2h25jcw1LX6fSvQGCOkzNmP03AhqZBUigO1Zt0zLwi
+        K4m0bH7nPLJFEN6tI3tybyZeC2RVyiSHvOkgx35Qj8RQ3XMVkImJNBYOMc2MkmMZ
+        ux6XMiHqXCON4zaWuWSovciZeMAQAspCrzVDLH6p2DWEfw/zDfQNU3iLk21sZGei
+        0GKzs8zrxUcqOU9V4Cnm+7JJ6eqS72f1+wX0ROb3djC6KgCE/NaHqo4apiI3K+CH
+        T0rVRsJIHyT39YO1c1I1vhAKRSH5kQVe3qRfIT/AuaDLQY6WqGPzrOkem78sjtsC
+        AwEAAaNvMG0wHQYDVR0OBBYEFK0DP5MD6mhEcdcm346uwoPL2NFGMB8GA1UdIwQY
+        MBaAFK0DP5MD6mhEcdcm346uwoPL2NFGMA8GA1UdEwEB/wQFMAMBAf8wGgYDVR0R
+        BBMwEYIJbG9jYWxob3N0hwR/AAABMA0GCSqGSIb3DQEBCwUAA4ICAQCc5u8qNHHG
+        kONjfvq7Denq6QaEt4dZZDDODAvgUzZnnBjEhgrp7zfxtbyU/I0+DWnKQMKA9wPM
+        ktiFGd0lldEqoT+E7b0kN124lBGqZ/uYkhsWZ0Nc5dD+UB9oJszwOc5KNuquOnr6
+        SbsfXVm4yLvVLXl67c0jvqvRgGg9/6Q6eMzohW6abMdbYhS28/DsJhCea/dV3+L1
+        oVJ3O/A8e86m174ZCGE8s9UtnVYylBkAryDqaaQLdOBQ2C7uxdRAUNHSIa2JlqUc
+        5+cod8lFojKb74hbgj6wkXyajsFttqYMh7CeASsnjZXDQ4MC3DqqDVCZuNvJ85Rt
+        ya3Tljp4Ln2AAAoKC3REUeU8PQqpk1vVIj0FSr3RvBTvwzyNfWFVqyBiXTATuV9n
+        6AemqqXo5MZrHHeRaSTF8A70Jxbt9yx75xQxp3O3tdEL1Mxbl9X7c/hizOfLbeHH
+        IkAgzALQgi87Zbf2tOhRwH5NrB4ijyUUfovRHUwzsZOoTNqlVeNzbDRVbegx9V99
+        /3vwNZgpStGl/JYhN9qY5hJKnC64ltMvuNGpLeJCGyFkrtFS8gKkgR7VKrGo7h3+
+        Zo8rz8TFjP7RmSgQbrmFuPqNOGXzPidu2sMMFacKV7Rn4bEtHzW3MDhqVD4w/pGD
+        L0xpnWjzLYltVjz8mo07yh+zQ10G71Cl1w==
+        -----END CERTIFICATE-----
+        """;
+
+        [Fact]
+        public void TestDependabotProxyCertificate()
+        {
+            // Setup
+            var config = new DependabotConfigurationStub
+            {
+                Port = "8080",
+                Host = "my.private.server",
+                Certificate = ExampleCertificate
+            };
+
+            // Execute
+            using var tempWorkingDirectory = MakeTemporaryDirectory();
+            using var proxy = DependabotProxy.MakeAux(config, new LoggerStub(), new DiagnosticsWriterStub(), tempWorkingDirectory);
+
+            // Verify
+            Assert.NotNull(proxy);
+            Assert.Equal("http://my.private.server:8080", proxy.Address);
+            Assert.NotNull(proxy.Certificate);
+            Assert.NotNull(proxy.CertificatePath);
+        }
+
+        [Fact]
+        public void TestDependabotRegistryUrls1()
+        {
+            // Setup
+            var config = new DependabotConfigurationStub
+            {
+                Port = "8080",
+                Host = "my.private.server",
+                RegistryURLs = "Doesn't parse as a JSON list"
+            };
+
+            // Execute
+            using var tempWorkingDirectory = MakeTemporaryDirectory();
+            using var proxy = DependabotProxy.MakeAux(config, new LoggerStub(), new DiagnosticsWriterStub(), tempWorkingDirectory);
+
+            // Verify
+            Assert.NotNull(proxy);
+            Assert.Equal([], proxy.RegistryURLs);
+        }
+
+        [Fact]
+        public void TestDependabotRegistryUrls2()
+        {
+            // Setup
+            var config = new DependabotConfigurationStub
+            {
+                Port = "8080",
+                Host = "my.private.server",
+                RegistryURLs = "[ { \"type\": \"nuget_feed\", \"url\": \"https://nuget.pkg.github.com/org/index.json\" } ]"
+            };
+
+            // Execute
+            using var tempWorkingDirectory = MakeTemporaryDirectory();
+            using var proxy = DependabotProxy.MakeAux(config, new LoggerStub(), new DiagnosticsWriterStub(), tempWorkingDirectory);
+
+            // Verify
+            Assert.NotNull(proxy);
+            Assert.Equal([
+                "https://nuget.pkg.github.com/org/index.json"
+            ], proxy.RegistryURLs);
+        }
+
+        [Fact]
+        public void TestDependabotRegistryUrls3()
+        {
+            // Setup
+            var config = new DependabotConfigurationStub
+            {
+                Port = "8080",
+                Host = "my.private.server",
+                RegistryURLs = "[ { \"type\": \"nuget_feed\", \"url\": \"https://example.com/org/index.json\" }, { \"type\": \"wrong_type\", \"url\": \"https://nuget.pkg.github.com/org/index.json\" } ]"
+            };
+
+            // Execute
+            using var tempWorkingDirectory = MakeTemporaryDirectory();
+            using var proxy = DependabotProxy.MakeAux(config, new LoggerStub(), new DiagnosticsWriterStub(), tempWorkingDirectory);
+
+            // Verify
+            Assert.NotNull(proxy);
+            Assert.Equal([
+                "https://example.com/org/index.json"
+            ], proxy.RegistryURLs);
+        }
+    }
+}