307 lines
13 KiB
C#
307 lines
13 KiB
C#
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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
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using System.Collections.Generic;
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using System.Dynamic;
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using System.Linq;
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using Moq;
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using Xunit;
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namespace System.Web.Helpers.Test
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{
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public class WebGridDataSourceTest
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{
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[Fact]
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public void WebGridDataSourceReturnsNumberOfItemsAsTotalRowCount()
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{
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// Arrange
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var rows = GetValues();
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: GetValues(), elementType: typeof(Person), canPage: false, canSort: false);
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// Act and Assert
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Assert.Equal(rows.Count(), dataSource.TotalRowCount);
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}
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[Fact]
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public void WebGridDataSourceReturnsUnsortedListIfSortColumnIsNull()
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{
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// Arrange
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var values = GetValues();
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: GetValues(), elementType: typeof(Person), canPage: false, canSort: true);
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = null }, 0);
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// Assert
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Assert.True(Enumerable.SequenceEqual<object>(values.ToList(), rows.Select(r => r.Value).ToList(), new PersonComparer()));
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}
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[Fact]
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public void WebGridDataSourceReturnsUnsortedListIfSortColumnIsEmpty()
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{
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// Arrange
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var values = GetValues();
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: GetValues(), elementType: typeof(Person), canPage: false, canSort: true);
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = String.Empty }, 0);
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// Assert
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Assert.True(Enumerable.SequenceEqual<object>(values.ToList(), rows.Select(r => r.Value).ToList(), new PersonComparer()));
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}
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[Fact]
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public void WebGridDataSourceReturnsUnsortedListIfSortCannotBeInferred()
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{
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// Arrange
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var values = GetValues();
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: GetValues(), elementType: typeof(Person), canPage: false, canSort: true);
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = "Does-not-exist" }, 0);
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// Assert
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Assert.True(Enumerable.SequenceEqual<object>(values.ToList(), rows.Select(r => r.Value).ToList(), new PersonComparer()));
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}
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[Fact]
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public void WebGridDataSourceReturnsUnsortedListIfDefaultSortCannotBeInferred()
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{
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// Arrange
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var values = GetValues();
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var defaultSort = new SortInfo { SortColumn = "cannot-be-inferred" };
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: GetValues(), elementType: typeof(Person), canSort: true, canPage: false) { DefaultSort = defaultSort };
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = "Does-not-exist" }, 0);
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// Assert
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Assert.True(Enumerable.SequenceEqual<object>(values.ToList(), rows.Select(r => r.Value).ToList(), new PersonComparer()));
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}
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[Fact]
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public void WebGridDataSourceUsesDefaultSortWhenCurrentSortCannotBeInferred()
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{
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// Arrange
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var values = GetValues();
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var defaultSort = new SortInfo { SortColumn = "FirstName" };
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: GetValues(), elementType: typeof(Person), canSort: true, canPage: false) { DefaultSort = defaultSort };
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = "Does-not-exist" }, 0);
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// Assert
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Assert.True(Enumerable.SequenceEqual<object>(values.OrderBy(p => p.FirstName).ToList(), rows.Select(r => r.Value).ToList(), new PersonComparer()));
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}
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[Fact]
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public void WebGridDataSourceSortsUsingSpecifiedSort()
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{
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// Arrange
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var defaultSort = new SortInfo { SortColumn = "FirstName", SortDirection = SortDirection.Ascending };
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IEnumerable<dynamic> values = new[] { new Person { LastName = "Z" }, new Person { LastName = "X" }, new Person { LastName = "Y" } };
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: values, elementType: typeof(Person), canSort: true, canPage: false) { DefaultSort = defaultSort };
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = "LastName" }, 0);
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// Assert
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Assert.Equal(rows.ElementAt(0).Value.LastName, "X");
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Assert.Equal(rows.ElementAt(1).Value.LastName, "Y");
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Assert.Equal(rows.ElementAt(2).Value.LastName, "Z");
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}
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[Fact]
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public void WebGridDataSourceSortsDynamicType()
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{
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// Arrange
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IEnumerable<dynamic> values = new[] { new TestDynamicType("col", "val1"), new TestDynamicType("col", "val2"), new TestDynamicType("col", "val3") };
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: values, elementType: typeof(TestDynamicType), canSort: true, canPage: false);
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = "col", SortDirection = SortDirection.Descending }, 0);
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// Assert
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Assert.Equal(rows.ElementAt(0).Value.col, "val3");
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Assert.Equal(rows.ElementAt(1).Value.col, "val2");
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Assert.Equal(rows.ElementAt(2).Value.col, "val1");
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}
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[Fact]
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public void WebGridDataSourceWithNestedPropertySortsCorrectly()
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{
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// Arrange
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var element1 = new { Foo = new { Bar = "val2" } };
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var element2 = new { Foo = new { Bar = "val1" } };
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var element3 = new { Foo = new { Bar = "val3" } };
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IEnumerable<dynamic> values = new[] { element1, element2, element3 };
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: values, elementType: element1.GetType(), canSort: true, canPage: false);
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = "Foo.Bar", SortDirection = SortDirection.Descending }, 0);
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// Assert
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Assert.Equal(rows.ElementAt(0).Value.Foo.Bar, "val3");
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Assert.Equal(rows.ElementAt(1).Value.Foo.Bar, "val2");
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Assert.Equal(rows.ElementAt(2).Value.Foo.Bar, "val1");
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}
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[Fact]
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public void WebGridDataSourceSortsDictionaryBasedDynamicType()
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{
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// Arrange
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var value1 = new DynamicDictionary();
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value1["col"] = "val1";
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var value2 = new DynamicDictionary();
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value2["col"] = "val2";
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var value3 = new DynamicDictionary();
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value3["col"] = "val3";
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IEnumerable<dynamic> values = new[] { value1, value2, value3 };
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: values, elementType: typeof(TestDynamicType), canSort: true, canPage: false);
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = "col", SortDirection = SortDirection.Descending }, 0);
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// Assert
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Assert.Equal(rows.ElementAt(0).Value.col, "val3");
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Assert.Equal(rows.ElementAt(1).Value.col, "val2");
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Assert.Equal(rows.ElementAt(2).Value.col, "val1");
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}
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[Fact]
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public void WebGridDataSourceReturnsOriginalDataSourceIfValuesCannotBeSorted()
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{
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// Arrange
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IEnumerable<dynamic> values = new object[] { new TestDynamicType("col", "val1"), new TestDynamicType("col", "val2"), new TestDynamicType("col", DBNull.Value) };
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: values, elementType: typeof(TestDynamicType), canSort: true, canPage: false);
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = "col", SortDirection = SortDirection.Descending }, 0);
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// Assert
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Assert.Equal(rows.ElementAt(0).Value.col, "val1");
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Assert.Equal(rows.ElementAt(1).Value.col, "val2");
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Assert.Equal(rows.ElementAt(2).Value.col, DBNull.Value);
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}
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[Fact]
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public void WebGridDataSourceReturnsPagedResultsIfRowsPerPageIsSpecified()
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{
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// Arrange
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IEnumerable<dynamic> values = GetValues();
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: values, elementType: typeof(Person), canSort: false, canPage: true) { RowsPerPage = 2 };
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// Act
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var rows = dataSource.GetRows(new SortInfo(), 0);
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// Assert
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Assert.Equal(rows.Count, 2);
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Assert.Equal(rows.ElementAt(0).Value.LastName, "B2");
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Assert.Equal(rows.ElementAt(1).Value.LastName, "A2");
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}
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[Fact]
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public void WebGridDataSourceReturnsPagedSortedResultsIfRowsPerPageAndSortAreSpecified()
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{
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// Arrange
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IEnumerable<dynamic> values = GetValues();
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: values, elementType: typeof(Person), canSort: true, canPage: true) { RowsPerPage = 2 };
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// Act
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var rows = dataSource.GetRows(new SortInfo { SortColumn = "LastName", SortDirection = SortDirection.Descending }, 0);
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// Assert
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Assert.Equal(rows.Count, 2);
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Assert.Equal(rows.ElementAt(0).Value.LastName, "E2");
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Assert.Equal(rows.ElementAt(1).Value.LastName, "D2");
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}
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[Fact]
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public void WebGridDataSourceReturnsFewerThanRowsPerPageIfNumberOfItemsIsInsufficient()
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{
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// Arrange
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IEnumerable<dynamic> values = GetValues();
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: values, elementType: typeof(Person), canSort: true, canPage: true) { RowsPerPage = 3 };
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// Act
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var rows = dataSource.GetRows(new SortInfo(), 1);
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// Assert
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Assert.Equal(rows.Count, 2);
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Assert.Equal(rows.ElementAt(0).Value.LastName, "C2");
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Assert.Equal(rows.ElementAt(1).Value.LastName, "E2");
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}
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[Fact]
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public void WebGridDataSourceDoesNotThrowIfValuesAreNull()
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{
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// Arrange
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IEnumerable<dynamic> values = new object[] { String.Empty, null, DBNull.Value, null };
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var dataSource = new WebGridDataSource(new WebGrid(GetContext()), values: values, elementType: typeof(object), canSort: true, canPage: true) { RowsPerPage = 2 };
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// Act
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var rows = dataSource.GetRows(new SortInfo(), 0);
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// Assert
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Assert.Equal(rows.Count, 2);
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Assert.Equal(rows.ElementAt(0).Value, String.Empty);
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Assert.Null(rows.ElementAt(1).Value);
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}
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private IEnumerable<Person> GetValues()
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{
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return new[]
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{
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new Person { FirstName = "B1", LastName = "B2" },
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new Person { FirstName = "A1", LastName = "A2" },
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new Person { FirstName = "D1", LastName = "D2" },
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new Person { FirstName = "C1", LastName = "C2" },
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new Person { FirstName = "E1", LastName = "E2" },
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};
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}
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private class PersonComparer : IEqualityComparer<object>
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{
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public new bool Equals(object x, object y)
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{
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dynamic xDynamic = x;
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dynamic yDynamic = y;
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return (String.Equals(xDynamic.FirstName, yDynamic.FirstName, StringComparison.OrdinalIgnoreCase)
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&& String.Equals(xDynamic.LastName, yDynamic.LastName, StringComparison.OrdinalIgnoreCase));
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}
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public int GetHashCode(dynamic obj)
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{
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return 4; // Random dice roll
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}
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}
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private class TestDynamicType : DynamicObject
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{
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public Dictionary<string, object> _values = new Dictionary<string, object>();
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public TestDynamicType(string a, object b)
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{
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_values[a] = b;
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}
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public override bool TryGetMember(GetMemberBinder binder, out object result)
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{
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return _values.TryGetValue(binder.Name, out result);
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}
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}
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private class Person
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{
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public string FirstName { get; set; }
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public string LastName { get; set; }
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}
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private HttpContextBase GetContext()
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{
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return new Mock<HttpContextBase>().Object;
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}
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}
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}
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