Check for file removal

Author: dellis1972

tests/MSBuildDeviceIntegration/Tests/InstallTests.cs

@@ -615,6 +615,21 @@ public void AdbTargetChangesAppBundle ()
 		public void AppWithAndroidJavaSource ()
 		{
 			var path = Path.Combine ("temp", TestName);
+			var itemToDelete = new AndroidItem.AndroidJavaSource ("TestJavaClass2.java") {
+						Encoding = Encoding.ASCII,
+						TextContent = () => @"package com.test.java;
+
+public class TestJavaClass2 {
+
+	public String test(){
+		
+		return ""Java is called"";
+	}
+}",
+						Metadata = {
+							{ "Bind", "True" },
+						},
+					};
 			var proj = new XamarinAndroidApplicationProject {
 				OtherBuildItems = {
 					new AndroidItem.AndroidJavaSource ("TestJavaClass.java") {
@@ -632,6 +647,7 @@ public String test(){
 							{ "Bind", "True" },
 						},
 					},
+					itemToDelete,
 				}
 			};
 			using (var b = CreateApkBuilder ()) {
@@ -640,12 +656,19 @@ public String test(){
 				b.AssertHasNoWarnings ();
 				var generatedCode = Path.Combine (Root, b.ProjectDirectory, proj.IntermediateOutputPath,
 					"generated", "src", "Com.Test.Java.TestJavaClass.cs");
+				var generatedCode2 = Path.Combine (Root, b.ProjectDirectory, proj.IntermediateOutputPath,
+					"generated", "src", "Com.Test.Java.TestJavaClass2.cs");
 				FileAssert.Exists (generatedCode, $"'{generatedCode}' should have been generated.");
+				FileAssert.Exists (generatedCode2, $"'{generatedCode2}' should have been generated.");
 				Assert.IsTrue (b.DesignTimeBuild (proj, target: "UpdateGeneratedFiles"), "DTB should have succeeded.");
 				Assert.IsTrue (b.Output.IsTargetSkipped ("_ClearGeneratedManagedBindings", defaultIfNotUsed: true), $"`_ClearGeneratedManagedBindings` should be skipped on DTB build!");
 				FileAssert.Exists (generatedCode, $"'{generatedCode}' should have not be deleted on DTB build.");
-				Assert.IsTrue (b.Build (proj, doNotCleanupOnUpdate: true, saveProject: false), "Second build should have succeeded.");
+				FileAssert.Exists (generatedCode2, $"'{generatedCode2}' should have not be deleted on DTB build.");
+				proj.OtherBuildItems.Remove (itemToDelete);
+				Assert.IsTrue (b.Build (proj, doNotCleanupOnUpdate: true, saveProject: true), "Second build should have succeeded.");
 				FileAssert.Exists (generatedCode, $"'{generatedCode}' should have not be deleted on second build.");
+				FileAssert.DoesNotExist (generatedCode2, $"'{generatedCode2}' should have be deleted on second build.");
+				Assert.IsFalse (b.Output.IsTargetSkipped ("_CompileBindingJava"), $"`_CompileBindingJava` should run on second build!");
 				Assert.IsTrue (b.Output.IsTargetSkipped ("_ClearGeneratedManagedBindings"), $"`_ClearGeneratedManagedBindings` should be skipped on second build!");
 				// Call Install directly so Build does not get called automatically
 				Assert.IsTrue (b.RunTarget (proj, "Install", doNotCleanupOnUpdate: true, saveProject: false), "Install build should have succeeded.");