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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
namespace System.Data.Entity.SqlServer.SqlGen
{
using System.Data.Entity.Core.Common;
using System.Data.Entity.Core.Common.CommandTrees;
using System.Data.Entity.Core.Metadata.Edm;
using System.Data.Entity.SqlServer.Resources;
using System.Linq;
using System.Text;
using Moq;
using Xunit;
public class SqlFunctionCallHandlerTests
{
public class CastReturnTypeToInt16
{
[Fact]
public void CastReturnTypeToInt16_returns_false_when_function_is_not_in_list_that_needs_this_cast()
{
Assert.False(
SqlFunctionCallHandler.CastReturnTypeToInt16(
CreateMockDbFunctionExpression("Edm.NotOnYourNelly", PrimitiveTypeKind.Int16).Object));
}
[Fact]
public void CastReturnTypeToInt16_returns_true_when_function_is_in_list_to_need_cast()
{
Assert.True(
SqlFunctionCallHandler.CastReturnTypeToInt16(CreateMockDbFunctionExpression("Edm.Abs", PrimitiveTypeKind.Int16).Object));
}
[Fact]
public void CastReturnTypeToInt16_returns_false_when_function_is_in_list_to_need_cast_but_return_type_does_not_match()
{
Assert.False(
SqlFunctionCallHandler.CastReturnTypeToInt16(CreateMockDbFunctionExpression("Edm.Abs", PrimitiveTypeKind.Int32).Object));
}
}
public class CastReturnTypeToSingle
{
[Fact]
public void CastReturnTypeToSingle_returns_false_when_function_is_not_in_list_that_needs_this_cast()
{
Assert.False(
SqlFunctionCallHandler.CastReturnTypeToSingle(
CreateMockDbFunctionExpression("Edm.NotOnYourNelly", PrimitiveTypeKind.Single).Object));
}
[Fact]
public void CastReturnTypeToSingle_returns_true_when_function_is_in_list_to_need_cast()
{
Assert.True(
SqlFunctionCallHandler.CastReturnTypeToSingle(
CreateMockDbFunctionExpression("Edm.Floor", PrimitiveTypeKind.Single).Object));
}
[Fact]
public void CastReturnTypeToSingle_returns_false_when_function_is_in_list_to_need_cast_but_return_type_does_not_match()
{
Assert.False(
SqlFunctionCallHandler.CastReturnTypeToSingle(
CreateMockDbFunctionExpression("Edm.Floor", PrimitiveTypeKind.Double).Object));
}
}
public class CastReturnTypeToInt64
{
[Fact]
public void CastReturnTypeToInt64_returns_false_when_function_is_not_in_list_that_needs_this_cast()
{
Assert.False(
SqlFunctionCallHandler.CastReturnTypeToInt64(
CreateMockDbFunctionExpression("Edm.NotOnYourNelly", PrimitiveTypeKind.Int64).Object));
}
[Fact]
public void CastReturnTypeToInt64_returns_true_when_function_is_in_list_to_need_cast()
{
Assert.True(
SqlFunctionCallHandler.CastReturnTypeToInt64(
CreateMockDbFunctionExpression("SqlServer.CHARINDEX", PrimitiveTypeKind.Int64).Object));
}
[Fact]
public void CastReturnTypeToInt64_returns_false_when_function_is_in_list_to_need_cast_but_return_type_does_not_match()
{
Assert.False(
SqlFunctionCallHandler.CastReturnTypeToInt64(
CreateMockDbFunctionExpression("SqlServer.CHARINDEX", PrimitiveTypeKind.Int32).Object));
}
}
public class CastReturnTypeToInt32
{
[Fact]
public void CastReturnTypeToInt32_returns_false_when_function_is_not_in_list_that_needs_this_cast()
{
Assert.False(
SqlFunctionCallHandler.CastReturnTypeToInt32(
new SqlGenerator(), CreateMockDbFunctionExpression("Edm.NotOnYourNelly", PrimitiveTypeKind.Int32).Object));
}
[Fact]
public void CastReturnTypeToInt32_returns_true_when_function_is_in_list_to_need_cast()
{
Assert.True(
SqlFunctionCallHandler.CastReturnTypeToInt32(
CreateMockSqlGenerator("ntext").Object,
CreateMockDbFunctionExpression("SqlServer.PATINDEX", PrimitiveTypeKind.Int32).Object));
}
[Fact]
public void CastReturnTypeToInt32_returns_false_when_function_is_in_list_to_need_cast_but_return_type_does_not_match()
{
Assert.False(
SqlFunctionCallHandler.CastReturnTypeToInt32(
CreateMockSqlGenerator("nope").Object,
CreateMockDbFunctionExpression("SqlServer.PATINDEX", PrimitiveTypeKind.Int32).Object));
}
}
public class HandleDatepartDateFunction
{
[Fact]
public void HandleDatepartDateFunction_throws_when_argument_is_not_a_constant()
{
var mockExpression = new Mock<DbFunctionExpression>();
mockExpression.Setup(m => m.Function).Returns(CreateMockEdmFunction("My.Function").Object);
mockExpression.Setup(m => m.Arguments).Returns(new[] { new Mock<DbExpression>().Object });
Assert.Equal(
Strings.SqlGen_InvalidDatePartArgumentExpression("My", "Function"),
Assert.Throws<InvalidOperationException>(
() => SqlFunctionCallHandler.HandleDatepartDateFunction(null, mockExpression.Object)).Message);
}
[Fact]
public void HandleDatepartDateFunction_throws_when_argument_is_not_a_string()
{
Assert.Equal(
Strings.SqlGen_InvalidDatePartArgumentExpression("My", "Function"),
Assert.Throws<InvalidOperationException>(
() =>
SqlFunctionCallHandler.HandleDatepartDateFunction(
null, CreateMockDbFunctionExpression("My.Function", PrimitiveTypeKind.String, 69).Object)).Message);
}
[Fact]
public void HandleDatepartDateFunction_throws_when_argument_does_not_contain_a_valid_date_part()
{
Assert.Equal(
Strings.SqlGen_InvalidDatePartArgumentValue("mp4-27", "My", "Function"),
Assert.Throws<InvalidOperationException>(
() =>
SqlFunctionCallHandler.HandleDatepartDateFunction(
null, CreateMockDbFunctionExpression("My.Function", PrimitiveTypeKind.String, "mp4-27").Object)).Message);
}
[Fact]
public void HandleDatepartDateFunction_builds_SQL_for_the_given_date_part()
{
var builder = new StringBuilder();
using (var writer = new SqlWriter(builder))
{
SqlFunctionCallHandler.HandleDatepartDateFunction(
null, CreateMockDbFunctionExpression("My.Function", PrimitiveTypeKind.String, "iso_week").Object)
.WriteSql(writer, null);
Assert.Equal("[My].[Function](iso_week)", builder.ToString());
}
}
[Fact]
public void HandleDatepartDateFunction_builds_SQL_for_the_given_date_part_with_arguments()
{
var builder = new StringBuilder();
using (var writer = new SqlWriter(builder))
{
SqlFunctionCallHandler.HandleDatepartDateFunction(
null, CreateMockDbFunctionExpression("My.Function", PrimitiveTypeKind.String, "iso_week", "One", "Two").Object)
.WriteSql(writer, null);
Assert.Equal("[My].[Function](iso_week, One, Two)", builder.ToString());
}
}
}
private static Mock<SqlGenerator> CreateMockSqlGenerator(string storeType)
{
var mockEdmType = new Mock<EdmType>();
mockEdmType.Setup(m => m.Name).Returns(storeType);
var mockStoreType = new Mock<TypeUsage>();
mockStoreType.Setup(m => m.EdmType).Returns(mockEdmType.Object);
var mockStoreProviderManifest = new Mock<DbProviderManifest>();
mockStoreProviderManifest.Setup(m => m.GetStoreType(It.IsAny<TypeUsage>())).Returns(mockStoreType.Object);
var mockStoreItemCollection = new Mock<StoreItemCollection>();
mockStoreItemCollection.Setup(m => m.StoreProviderManifest).Returns(mockStoreProviderManifest.Object);
var mockSqlGenerator = new Mock<SqlGenerator>();
mockSqlGenerator.Setup(m => m.StoreItemCollection).Returns(mockStoreItemCollection.Object);
return mockSqlGenerator;
}
private static Mock<DbFunctionExpression> CreateMockDbFunctionExpression(
string functionName,
PrimitiveTypeKind returnType,
object argumentValue = null,
params string[] additionalArguments)
{
additionalArguments = additionalArguments ?? new string[0];
var mockEdmType = new Mock<PrimitiveType>();
mockEdmType.Setup(m => m.BuiltInTypeKind).Returns(BuiltInTypeKind.PrimitiveType);
mockEdmType.Setup(m => m.PrimitiveTypeKind).Returns(returnType);
var mockTypeUsage = new Mock<TypeUsage>();
mockTypeUsage.Setup(m => m.EdmType).Returns(mockEdmType.Object);
var mockArgument = new Mock<DbConstantExpression>();
mockArgument.Setup(m => m.ResultType).Returns(mockTypeUsage.Object);
mockArgument.Setup(m => m.Value).Returns(argumentValue);
var arguments = new DbExpression[] { mockArgument.Object }.Concat(
additionalArguments.Select(
a =>
{
var mockSqlWriter = new Mock<ISqlFragment>();
mockSqlWriter.Setup(m => m.WriteSql(It.IsAny<SqlWriter>(), It.IsAny<SqlGenerator>()))
.Callback((SqlWriter writer, SqlGenerator generator) => writer.Write(a));
var mockAdditionalArgument = new Mock<DbConstantExpression>();
mockAdditionalArgument.Setup(m => m.ResultType).Returns(mockTypeUsage.Object);
mockAdditionalArgument.Setup(m => m.Value).Returns("Value");
mockAdditionalArgument.Setup(m => m.Accept(It.IsAny<DbExpressionVisitor<ISqlFragment>>()))
.Returns(mockSqlWriter.Object);
return mockAdditionalArgument.Object;
}));
var mockExpression = new Mock<DbFunctionExpression>();
mockExpression.Setup(m => m.Function).Returns(CreateMockEdmFunction(functionName).Object);
mockExpression.Setup(m => m.Arguments).Returns(arguments.ToArray());
return mockExpression;
}
private static Mock<EdmFunction> CreateMockEdmFunction(string functionName)
{
var mockProperty = new Mock<MetadataProperty>();
mockProperty.Setup(m => m.Name).Returns("DataSpace");
mockProperty.Setup(m => m.Value).Returns(DataSpace.CSpace);
var mockEdmFunction = new Mock<EdmFunction>();
mockEdmFunction.Setup(m => m.FullName).Returns(functionName);
mockEdmFunction.Setup(m => m.NamespaceName).Returns(functionName.Split('.')[0]);
mockEdmFunction.Setup(m => m.Name).Returns(functionName.Split('.')[1]);
mockEdmFunction.Setup(m => m.DataSpace).Returns(DataSpace.CSpace);
mockEdmFunction.Setup(m => m.MetadataProperties).Returns(
new ReadOnlyMetadataCollection<MetadataProperty>(new[] { mockProperty.Object }));
return mockEdmFunction;
}
}
}
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