adding unit tests

Author: aishwaryabh

test/Cli/Func.UnitTests/ActionsTests/StartHostActionTests.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
 using System.IO.Abstractions;
@@ -273,7 +273,7 @@ public async Task GetConfigurationSettings_OverwritesAzFuncEnvironment_WhenAlrea
             };
 
             var mockSecretsManager = new Mock<ISecretsManager>();
-            mockSecretsManager.Setup(s => s.GetSecrets())
+            mockSecretsManager.Setup(s => s.GetSecrets(false))
                             .Returns(() => new Dictionary<string, string>(secretsDict));
 
             // Return an empty set of connection strings of the expected type

test/Cli/Func.UnitTests/HelperTests/HostHelperTests.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
 using System.IO.Abstractions;
@@ -32,7 +32,7 @@ public async Task GetCustomHandlerExecutable_Throws_When_HostJson_Missing()
         [Fact]
         public async Task GetCustomHandlerExecutable_Returns_ExecutablePath_When_Present()
         {
-            var json = @"{""customHandler"":{""description"":{""defaultExecutablePath"":""file.exe""}}}";
+            var json = @"{""customHandler"":{""description"":{ ""defaultExecutablePath"":""file.exe"" }}}";
             var fileSystem = Substitute.For<IFileSystem>();
             fileSystem.File.Exists(Arg.Any<string>()).Returns(true);
             fileSystem.File.Open(Arg.Any<string>(), Arg.Any<FileMode>(), Arg.Any<FileAccess>(), Arg.Any<FileShare>())
@@ -56,7 +56,7 @@ public async Task GetCustomHandlerExecutable_Returns_ExecutablePath_When_Present
         [Fact]
         public async Task GetCustomHandlerExecutable_Returns_Empty_When_ExecutablePath_Missing()
         {
-            var json = @"{""customHandler"":{""description"":{}}}";
+            var json = @"{""customHandler"":{ ""description"":{}}}";
             var fileSystem = Substitute.For<IFileSystem>();
             fileSystem.File.Exists(Arg.Any<string>()).Returns(true);
             fileSystem.File.Open(Arg.Any<string>(), Arg.Any<FileMode>(), Arg.Any<FileAccess>(), Arg.Any<FileShare>())
@@ -101,6 +101,40 @@ public async Task GetCustomHandlerExecutable_Returns_Empty_When_CustomHandler_Mi
             result.Should().BeEmpty();
         }
 
+        [Fact]
+        public async Task GetCustomHandlerExecutable_Uses_Provided_Path_To_Read_HostJson()
+        {
+            // Arrange
+            var customRoot = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N"));
+            var expectedHostJsonPath = Path.Combine(customRoot, Constants.HostJsonFileName);
+            var json = @"{""customHandler"":{""description"":{ ""defaultExecutablePath"":""file.exe"" }}}";
+
+            var fileSystem = Substitute.For<IFileSystem>();
+
+            fileSystem.File.Exists(Arg.Any<string>())
+                .Returns(ci => string.Equals(ci.ArgAt<string>(0), expectedHostJsonPath, StringComparison.OrdinalIgnoreCase));
+
+            fileSystem.File.Open(Arg.Any<string>(), Arg.Any<FileMode>(), Arg.Any<FileAccess>(), Arg.Any<FileShare>())
+                .Returns(ci =>
+                {
+                    var path = ci.ArgAt<string>(0);
+                    if (string.Equals(path, expectedHostJsonPath, StringComparison.OrdinalIgnoreCase))
+                    {
+                        return json.ToStream();
+                    }
+
+                    throw new FileNotFoundException(path);
+                });
+
+            FileSystemHelpers.Instance = fileSystem;
+
+            // Act
+            var result = await HostHelpers.GetCustomHandlerExecutable(customRoot);
+
+            // Assert
+            result.Should().Be("file.exe");
+        }
+
         public void Dispose()
         {
             FileSystemHelpers.Instance = _originalFileSystem;