public void EnumerateItems_ReturnsEmptySequence_IfNoFileSystemReturnsResults()
        {
            // Arrange
            var basePath    = "base-path";
            var fileSystem1 = Mock.Of <RazorProjectFileSystem>(
                f => f.EnumerateItems(basePath) == Enumerable.Empty <RazorProjectItem>());
            var fileSystem2 = Mock.Of <RazorProjectFileSystem>(
                f => f.EnumerateItems(basePath) == Enumerable.Empty <RazorProjectItem>());

            var compositeRazorProjectFileSystem = new CompositeRazorProjectFileSystem(new[] { fileSystem1, fileSystem2 });

            // Act
            var result = compositeRazorProjectFileSystem.EnumerateItems(basePath);

            // Assert
            Assert.Empty(result);
        }
        public void EnumerateItems_ReturnsResultsFromAllFileSystems()
        {
            // Arrange
            var basePath    = "base-path";
            var file1       = new TestRazorProjectItem("file1");
            var file2       = new TestRazorProjectItem("file2");
            var file3       = new TestRazorProjectItem("file3");
            var fileSystem1 = Mock.Of <RazorProjectFileSystem>(
                f => f.EnumerateItems(basePath) == new[] { file1 });
            var fileSystem2 = Mock.Of <RazorProjectFileSystem>(
                f => f.EnumerateItems(basePath) == Enumerable.Empty <RazorProjectItem>());
            var fileSystem3 = Mock.Of <RazorProjectFileSystem>(
                f => f.EnumerateItems(basePath) == new[] { file2, file3, });

            var compositeRazorProjectFileSystem = new CompositeRazorProjectFileSystem(new[] { fileSystem1, fileSystem2, fileSystem3 });

            // Act
            var result = compositeRazorProjectFileSystem.EnumerateItems(basePath);

            // Assert
            Assert.Equal(new[] { file1, file2, file3 }, result);
        }
        public void GetItem_ReturnsFirstInstanceThatExists()
        {
            // Arrange
            var basePath = "base-path";
            var filePath = "file-path";
            var file1    = new NotFoundProjectItem(basePath, filePath, fileKind: null);
            var file2    = new TestRazorProjectItem(filePath);
            RazorProjectItem nullItem = null;
            var fileSystem1           = Mock.Of <RazorProjectFileSystem>(
                f => f.GetItem(filePath, null) == file1);
            var fileSystem2 = Mock.Of <RazorProjectFileSystem>(
                f => f.GetItem(filePath, null) == nullItem);
            var fileSystem3 = Mock.Of <RazorProjectFileSystem>(
                f => f.GetItem(filePath, null) == file2);

            var compositeRazorProjectFileSystem = new CompositeRazorProjectFileSystem(new[] { fileSystem1, fileSystem2, fileSystem3 });

            // Act
            var result = compositeRazorProjectFileSystem.GetItem(filePath, fileKind: null);

            // Assert
            Assert.Same(file2, result);
        }