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Apr 3, 2023
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Improve the DataRowCollectionEquivalency code coverage #2163

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120 changes: 120 additions & 0 deletions Tests/FluentAssertions.Equivalency.Specs/DataTableSpecs.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
using System;
using System.Collections.Generic;
using System.Data;
using System.Globalization;
using System.Linq;
Expand Down Expand Up @@ -32,6 +33,125 @@ public void When_data_tables_are_both_null_equivalence_test_should_succeed()
((DataTable)null).Should().BeEquivalentTo(null);
}

[Fact]
public void When_row_match_mode_is_invalid_it_should_fail()
{
// Arrange
var typedDataSet = CreateDummyDataSet<TypedDataSetSubclass>();

var subject = typedDataSet.ToUntypedDataSet().Tables["TypedDataTable1"];
var expectation = typedDataSet.ToUntypedDataSet().Tables["TypedDataTable1"];

// Act
Action action = () => subject.Should().BeEquivalentTo(expectation, options => options.UsingRowMatchMode((RowMatchMode)2));

// Assert
action.Should().Throw<XunitException>().WithMessage(
"Unknown RowMatchMode *when trying to compare *");
}

[Theory]
[MemberData(nameof(EmptyPrimaryKeys))]
public void When_row_match_mode_is_primary_key_without_primary_key_it_should_fail(DataColumn[] emptyPrimaryKey)
{
// Arrange
var typedDataSet = CreateDummyDataSet<TypedDataSetSubclass>(includeRelation: false);

var subject = typedDataSet.ToUntypedDataSet().Tables["TypedDataTable1"];
var expectation = typedDataSet.ToUntypedDataSet().Tables["TypedDataTable1"];

subject.PrimaryKey = emptyPrimaryKey;

// Act
Action action = () =>
subject.Should().BeEquivalentTo(expectation, options => options.UsingRowMatchMode(RowMatchMode.PrimaryKey));

// Assert
action.Should().Throw<XunitException>().WithMessage(
"*Table *containing *does not have a primary key. RowMatchMode.PrimaryKey cannot be applied.*");
}

public static TheoryData<DataColumn[]> EmptyPrimaryKeys => new()
{
null,
new DataColumn[] { }
};

[Fact]
public void When_primary_key_types_do_not_match_it_should_throw()
{
// Arrange
var typedDataSetSubject = CreateDummyDataSet<TypedDataSetSubclass>(includeDummyData: false, includeRelation: false);
var typedDataSetExpectation = new TypedDataSetSubclass(typedDataSetSubject);

var subject = typedDataSetSubject.ToUntypedDataSet().Tables["TypedDataTable1"];
var expectation = typedDataSetExpectation.ToUntypedDataSet().Tables["TypedDataTable1"];

subject.PrimaryKey[0].DataType = typeof(long);
subject.Rows.Add(1L);
subject.AcceptChanges();
expectation.Rows.Add(1);
expectation.AcceptChanges();

// Act
Action action = () =>
subject.Should().BeEquivalentTo(expectation, options => options.UsingRowMatchMode(RowMatchMode.PrimaryKey));

// Assert
action.Should().Throw<XunitException>().WithMessage(
"*Subject and expectation primary keys of table containing *do not have the same schema and cannot be compared. " +
"RowMatchMode.PrimaryKey cannot be applied.*");
}

[Fact]
public void When_primary_key_of_one_rows_differ_it_should_fail()
{
// Arrange
var typedDataSetSubject = CreateDummyDataSet<TypedDataSetSubclass>();
var typedDataSetExpectation = new TypedDataSetSubclass(typedDataSetSubject);

var subject = typedDataSetSubject.ToUntypedDataSet().Tables["TypedDataTable1"];
var expectation = typedDataSetExpectation.ToUntypedDataSet().Tables["TypedDataTable1"];

expectation.Rows[0].SetField(expectation.PrimaryKey[0], 0);

expectation.AcceptChanges();

// Act
Action action = () =>
subject.Should().BeEquivalentTo(expectation, options => options.UsingRowMatchMode(RowMatchMode.PrimaryKey));

// Assert
action.Should().Throw<XunitException>().WithMessage(
"Found unexpected row in *with key *Expected to find a row with key *in *, but no such row was found*");
}

[Fact]
public void When_primary_key_of_multiple_rows_differ_it_should_fail()
{
// Arrange
var typedDataSetSubject = CreateDummyDataSet<TypedDataSetSubclass>();
var typedDataSetExpectation = new TypedDataSetSubclass(typedDataSetSubject);

var subject = typedDataSetSubject.ToUntypedDataSet().Tables["TypedDataTable1"];
var expectation = typedDataSetExpectation.ToUntypedDataSet().Tables["TypedDataTable1"];

for (int i = 0; i < 3; i++)
{
expectation.Rows[i].SetField(expectation.PrimaryKey[0], i);
}

expectation.AcceptChanges();

// Act
Action action = () =>
subject.Should().BeEquivalentTo(expectation, options => options.UsingRowMatchMode(RowMatchMode.PrimaryKey));

// Assert
action.Should().Throw<XunitException>().WithMessage(
"Found unexpected row in *with key * rows were expected in *and not found*");
}

[Fact]
public void When_data_table_is_null_and_isnt_expected_to_be_equivalence_test_should_fail()
{
Expand Down