(GH-356) Get work items from build

src/Cake.AzureDevOps.Tests/Fakes/FakeAllSetBuildClientFactory.cs

@@ -1,10 +1,12 @@
 namespace Cake.AzureDevOps.Tests.Fakes
 {
     using System;
+    using System.Collections.Generic;
     using System.Threading;
     using Cake.AzureDevOps.Authentication;
     using Microsoft.TeamFoundation.Build.WebApi;
     using Microsoft.TeamFoundation.Core.WebApi;
+    using Microsoft.VisualStudio.Services.WebApi;
     using Moq;
 
     public class FakeAllSetBuildClientFactory : FakeBuildClientFactory
@@ -29,6 +31,12 @@ public override BuildHttpClient CreateBuildClient(Uri collectionUrl, IAzureDevOp
                     Project = new TeamProjectReference { Name = projectName },
                 });
 
+            mock.Setup(arg => arg.GetBuildWorkItemsRefsAsync(It.IsAny<string>(), It.IsAny<int>(), It.IsAny<int?>(), null, default))
+               .ReturnsAsync((string projectName, int buildId, int? top, object userState, CancellationToken token) => new List<ResourceRef>
+               {
+                  new ResourceRef { Id = "42" },
+               });
+
             mock = this.Setup(mock);
 
             return mock.Object;

src/Cake.AzureDevOps.Tests/Fakes/FakeAllSetWorkItemTrackingClientFactory.cs

@@ -0,0 +1,36 @@
+namespace Cake.AzureDevOps.Tests.Fakes
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Threading;
+    using Cake.AzureDevOps.Authentication;
+    using Microsoft.TeamFoundation.TestManagement.WebApi;
+    using Microsoft.TeamFoundation.WorkItemTracking.WebApi;
+    using Microsoft.TeamFoundation.WorkItemTracking.WebApi.Models;
+    using Moq;
+
+    public class FakeAllSetWorkItemTrackingClientFactory : FakeWorkItemTrackingClientFactory
+    {
+        public override WorkItemTrackingHttpClient CreateWorkItemTrackingClient(Uri collectionUrl, IAzureDevOpsCredentials credentials)
+        {
+            var mock = new Mock<WorkItemTrackingHttpClient>(MockBehavior.Strict, collectionUrl, credentials.ToVssCredentials());
+
+            mock.Setup(arg => arg.GetWorkItemsAsync(It.IsAny<IEnumerable<int>>(), It.IsAny<IEnumerable<string>>(), It.IsAny<DateTime?>(), It.IsAny<WorkItemExpand?>(), It.IsAny<WorkItemErrorPolicy?>(), null, default))
+                .ReturnsAsync((IEnumerable<int> workItemIds, IEnumerable<string> fields, DateTime? asOf, WorkItemExpand? expand, WorkItemErrorPolicy? errorPolicy, object userState, CancellationToken token) =>
+                {
+                    var result = new List<WorkItem>();
+
+                    foreach (var workItemId in workItemIds)
+                    {
+                        result.Add(new WorkItem { Id = workItemId });
+                    }
+
+                    return result;
+                });
+
+            mock = this.Setup(mock);
+
+            return mock.Object;
+        }
+    }
+}

src/Cake.AzureDevOps.Tests/Fakes/FakeWorkItemTrackingClientFactory.cs

@@ -0,0 +1,24 @@
+namespace Cake.AzureDevOps.Tests.Fakes
+{
+    using System;
+    using Cake.AzureDevOps.Authentication;
+    using Microsoft.TeamFoundation.WorkItemTracking.WebApi;
+    using Microsoft.VisualStudio.Services.Identity;
+    using Moq;
+
+    public abstract class FakeWorkItemTrackingClientFactory : IWorkItemTrackingClientFactory
+    {
+        public abstract WorkItemTrackingHttpClient CreateWorkItemTrackingClient(Uri collectionUrl, IAzureDevOpsCredentials credentials);
+
+        public WorkItemTrackingHttpClient CreateWorkItemTrackingClient(Uri collectionUrl, IAzureDevOpsCredentials credentials, out Identity authorizedIdentity)
+        {
+            authorizedIdentity = new Identity { ProviderDisplayName = "FakeUser", Id = Guid.NewGuid(), IsActive = true };
+            return this.CreateWorkItemTrackingClient(collectionUrl, credentials);
+        }
+
+        protected virtual Mock<WorkItemTrackingHttpClient> Setup(Mock<WorkItemTrackingHttpClient> m)
+        {
+            return m;
+        }
+    }
+}

src/Cake.AzureDevOps.Tests/Pipelines/AzureDevOpsBuildTests.cs

@@ -23,7 +23,8 @@ public void Should_Return_Empty_List_If_Build_Is_Invalid()
                     fixture.Log,
                     fixture.Settings,
                     fixture.BuildClientFactory,
-                    fixture.TestManagementClientFactory);
+                    fixture.TestManagementClientFactory,
+                    fixture.WorkItemTrackingClientFactory);
 
                 // When
                 var result = build.GetTestRuns();
@@ -42,7 +43,8 @@ public void Should_Return_Empty_List_If_Build_Does_Not_Contain_Test_Runs()
                     fixture.Log,
                     fixture.Settings,
                     fixture.BuildClientFactory,
-                    fixture.TestManagementClientFactory);
+                    fixture.TestManagementClientFactory,
+                    fixture.WorkItemTrackingClientFactory);
 
                 // When
                 var result = build.GetTestRuns();
@@ -64,7 +66,8 @@ public void Should_Return_List_Of_Test_Runs_With_X_Test_Results_If_X_Is_Less_The
                     fixture.Log,
                     fixture.Settings,
                     fixture.BuildClientFactory,
-                    fixture.TestManagementClientFactory);
+                    fixture.TestManagementClientFactory,
+                    fixture.WorkItemTrackingClientFactory);
 
                 // When
                 var result = build.GetTestRuns(testRunsCount);
@@ -87,7 +90,8 @@ public void Should_Throw_If_Input_Test_Outcomes_Are_Invalid()
                     fixture.Log,
                     fixture.Settings,
                     fixture.BuildClientFactory,
-                    fixture.TestManagementClientFactory);
+                    fixture.TestManagementClientFactory,
+                    fixture.WorkItemTrackingClientFactory);
 
                 // When
                 var result = Record.Exception(() => build.GetTestRuns(null, new string[] { "FakeOutcome" }));
@@ -105,7 +109,8 @@ public void Should_Return_List_Of_Test_Runs_With_Test_Results()
                     fixture.Log,
                     fixture.Settings,
                     fixture.BuildClientFactory,
-                    fixture.TestManagementClientFactory);
+                    fixture.TestManagementClientFactory,
+                    fixture.WorkItemTrackingClientFactory);
 
                 // When
                 var result = build.GetTestRuns();
@@ -126,5 +131,29 @@ public void Should_Return_List_Of_Test_Runs_With_Test_Results()
                     new AzureDevOpsTestResult { AutomatedTestName = "t3", Outcome = "Passed", ErrorMessage = string.Empty });
             }
         }
+
+        public sealed class TheGetWorkItemsMethod
+        {
+            [Fact]
+            public void Should_Return_List_Of_WorkItems()
+            {
+                // Given
+                var fixture = new BuildFixture(BuildFixture.ValidAzureDevOpsCollectionUrl, "Foo", 42);
+                var build = new AzureDevOpsBuild(
+                    fixture.Log,
+                    fixture.Settings,
+                    fixture.BuildClientFactory,
+                    fixture.TestManagementClientFactory,
+                    fixture.WorkItemTrackingClientFactory);
+
+                // When
+                var result = build.GetWorkItems();
+
+                // Then
+                result.ShouldNotBeNull();
+                result.ShouldHaveSingleItem();
+                result.First().WorkItemId.ShouldBe(42);
+            }
+        }
     }
 }

src/Cake.AzureDevOps.Tests/Pipelines/BuildFixture.cs

@@ -23,13 +23,16 @@ public BuildFixture(string collectionUrl, string projectName, int buildId)
 
         public ITestManagementClientFactory TestManagementClientFactory { get; set; }
 
+        public IWorkItemTrackingClientFactory WorkItemTrackingClientFactory { get; set; }
+
         public AzureDevOpsBuildSettings Settings { get; set; }
 
         private void InitialzeFakes()
         {
             this.Log = new FakeLog();
             this.BuildClientFactory = new FakeAllSetBuildClientFactory();
             this.TestManagementClientFactory = new FakeAllSetTestManagementClientFactory();
+            this.WorkItemTrackingClientFactory = new FakeAllSetWorkItemTrackingClientFactory();
         }
     }
 }

src/Cake.AzureDevOps/AzureDevOpsAliases.Pipelines.cs

@@ -1,6 +1,7 @@
 namespace Cake.AzureDevOps
 {
     using System.Collections.Generic;
+    using Cake.AzureDevOps.Boards.WorkItemTracking;
     using Cake.AzureDevOps.Pipelines;
     using Cake.Core;
     using Cake.Core.Annotations;
@@ -47,7 +48,7 @@ public static AzureDevOpsBuild AzureDevOpsBuild(
             context.NotNull(nameof(context));
             settings.NotNull(nameof(settings));
 
-            var build = new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory());
+            var build = new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory(), new WorkItemTrackingClientFactory());
 
             if (build.HasBuildLoaded)
             {
@@ -279,7 +280,7 @@ public static bool AzureDevOpsBuildIsFailing(
             settings.NotNull(nameof(settings));
 
             return
-                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory())
+                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory(), new WorkItemTrackingClientFactory())
                     .IsBuildFailing();
         }
 
@@ -327,10 +328,106 @@ public static IEnumerable<AzureDevOpsChange> AzureDevOpsBuildChanges(
             settings.NotNull(nameof(settings));
 
             return
-                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory())
+                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory(), new WorkItemTrackingClientFactory())
                     .GetChanges();
         }
 
+        /// <summary>
+        /// Gets the work item ids associated with an Azure Pipelines build.
+        /// </summary>
+        /// <param name="context">The context.</param>
+        /// <param name="settings">Settings for getting the build.</param>
+        /// <example>
+        /// <para>Get work item ids associated with an Azure Pipelines build:</para>
+        /// <code>
+        /// <![CDATA[
+        /// var buildSettings =
+        ///     new AzureDevOpsBuildSettings(
+        ///         new Uri("http://myserver:8080/defaultcollection"),
+        ///         "MyProject",
+        ///         42,
+        ///         AzureDevOpsAuthenticationNtlm());
+        ///
+        /// var workItemIds =
+        ///     AzureDevOpsBuildWorkItemIds(
+        ///         buildSettings);
+        ///
+        /// Information("Work item ids:");
+        /// foreach (var id in workItemIds)
+        /// {
+        ///     Information("  {0}", id);
+        /// }
+        /// ]]>
+        /// </code>
+        /// </example>
+        /// <returns>The work item ids associated with the build.
+        /// Returns an empty list if build could not be found and
+        /// <see cref="AzureDevOpsBuildSettings.ThrowExceptionIfBuildCouldNotBeFound"/> is set to <c>false</c>.</returns>
+        /// <exception cref="AzureDevOpsBuildNotFoundException">If build could not be found and
+        /// <see cref="AzureDevOpsBuildSettings.ThrowExceptionIfBuildCouldNotBeFound"/> is set to <c>true</c>.</exception>
+        [CakeMethodAlias]
+        [CakeAliasCategory("Azure Pipelines")]
+        [CakeNamespaceImport("Cake.AzureDevOps.Pipelines")]
+        public static IEnumerable<int> AzureDevOpsBuildWorkItemIds(
+            this ICakeContext context,
+            AzureDevOpsBuildSettings settings)
+        {
+            context.NotNull(nameof(context));
+            settings.NotNull(nameof(settings));
+
+            return
+                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory(), new WorkItemTrackingClientFactory())
+                    .GetWorkItemIds();
+        }
+
+        /// <summary>
+        /// Gets the work items associated with an Azure Pipelines build.
+        /// </summary>
+        /// <param name="context">The context.</param>
+        /// <param name="settings">Settings for getting the build.</param>
+        /// <example>
+        /// <para>Get work items associated with an Azure Pipelines build:</para>
+        /// <code>
+        /// <![CDATA[
+        /// var buildSettings =
+        ///     new AzureDevOpsBuildSettings(
+        ///         new Uri("http://myserver:8080/defaultcollection"),
+        ///         "MyProject",
+        ///         42,
+        ///         AzureDevOpsAuthenticationNtlm());
+        ///
+        /// var workItems =
+        ///     AzureDevOpsBuildWorkItems(
+        ///         buildSettings);
+        ///
+        /// Information("Work item:");
+        /// foreach (var workItem in workItems)
+        /// {
+        ///     Information("  {0}: {1}", workItem.Id, workItem.Title);
+        /// }
+        /// ]]>
+        /// </code>
+        /// </example>
+        /// <returns>The work item ids associated with the build.
+        /// Returns an empty list if build could not be found and
+        /// <see cref="AzureDevOpsBuildSettings.ThrowExceptionIfBuildCouldNotBeFound"/> is set to <c>false</c>.</returns>
+        /// <exception cref="AzureDevOpsBuildNotFoundException">If build could not be found and
+        /// <see cref="AzureDevOpsBuildSettings.ThrowExceptionIfBuildCouldNotBeFound"/> is set to <c>true</c>.</exception>
+        [CakeMethodAlias]
+        [CakeAliasCategory("Azure Pipelines")]
+        [CakeNamespaceImport("Cake.AzureDevOps.Pipelines")]
+        public static IEnumerable<AzureDevOpsWorkItem> AzureDevOpsBuildWorkItems(
+            this ICakeContext context,
+            AzureDevOpsBuildSettings settings)
+        {
+            context.NotNull(nameof(context));
+            settings.NotNull(nameof(settings));
+
+            return
+                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory(), new WorkItemTrackingClientFactory())
+                    .GetWorkItems();
+        }
+
         /// <summary>
         /// Gets the timeline entries for an Azure Pipelines build.
         /// </summary>
@@ -375,7 +472,7 @@ public static IEnumerable<AzureDevOpsTimelineRecord> AzureDevOpsBuildTimelineRec
             settings.NotNull(nameof(settings));
 
             return
-                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory())
+                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory(), new WorkItemTrackingClientFactory())
                     .GetTimelineRecords();
         }
 
@@ -423,7 +520,7 @@ public static IEnumerable<AzureDevOpsBuildArtifact> AzureDevOpsBuildArtifacts(
             settings.NotNull(nameof(settings));
 
             return
-                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory())
+                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory(), new WorkItemTrackingClientFactory())
                     .GetArtifacts();
         }
 
@@ -471,7 +568,7 @@ public static IEnumerable<AzureDevOpsTestRun> AzureDevOpsBuildTestRuns(
             settings.NotNull(nameof(settings));
 
             return
-                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory())
+                new AzureDevOpsBuild(context.Log, settings, new BuildClientFactory(), new TestManagementClientFactory(), new WorkItemTrackingClientFactory())
                     .GetTestRuns();
         }
 

src/Cake.AzureDevOps/AzureDevOpsAliases.WorkItemTracking.cs

@@ -61,7 +61,7 @@ public static AzureDevOpsWorkItem AzureDevOpsWorkItem(
         /// Make sure the build has the 'Allow Scripts to access OAuth token' option enabled.
         /// </summary>
         /// <param name="context">The context.</param>
-        /// <param name="workItemId">ID of the work witem.</param>
+        /// <param name="workItemId">ID of the work item.</param>
         /// <example>
         /// <para>Get an Azure DevOps work item:</para>
         /// <code>

src/Cake.AzureDevOps/Boards/WorkItemTracking/AzureDevOpsWorkItem.cs

@@ -2,8 +2,6 @@
 {
     using System;
     using System.Collections.Generic;
-    using System.Linq;
-    using Cake.AzureDevOps.Authentication;
     using Cake.Core.Diagnostics;
     using Microsoft.TeamFoundation.WorkItemTracking.WebApi.Models;
     using Microsoft.VisualStudio.Services.Common;
@@ -36,15 +34,16 @@ public AzureDevOpsWorkItem(ICakeLog log, AzureDevOpsWorkItemSettings settings)
         /// <param name="log">The Cake log context.</param>
         /// <param name="settings">Settings for accessing AzureDevOps.</param>
         /// <param name="workItem">The work item.</param>
-        internal AzureDevOpsWorkItem(ICakeLog log, AzureDevOpsWorkItemSettings settings, WorkItem workItem)
+        /// <param name="workItemTrackingClientFactory">A factory to communicate with work item tracking client.</param>
+        internal AzureDevOpsWorkItem(ICakeLog log, AzureDevOpsWorkItemSettings settings, WorkItem workItem, IWorkItemTrackingClientFactory workItemTrackingClientFactory)
         {
             log.NotNull(nameof(log));
             settings.NotNull(nameof(settings));
             workItem.NotNull(nameof(workItem));
 
             this.log = log;
             this.workItem = workItem;
-            this.workItemTrackingClientFactory = new WorkItemTrackingClientFactory();
+            this.workItemTrackingClientFactory = workItemTrackingClientFactory;
             this.settings = settings;
         }
 
@@ -140,7 +139,7 @@ internal AzureDevOpsWorkItem(
         /// <summary>
         /// Gets the URL for accessing the web portal of the Azure DevOps collection.
         /// </summary>
-        public Uri CollectionUrl => this.settings.CollectionUrl;        
+        public Uri CollectionUrl => this.settings.CollectionUrl;
 
         /// <summary>
         /// Gets the ID of the work item.