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JsonNetTests.cs
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using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Npgsql.Tests;
using NUnit.Framework;
using System;
using System.Data;
using System.Threading.Tasks;
// ReSharper disable AccessToModifiedClosure
// ReSharper disable AccessToDisposedClosure
namespace Npgsql.PluginTests;
/// <summary>
/// Tests for the Npgsql.Json.NET mapping plugin
/// </summary>
[TestFixture("jsonb")]
[TestFixture("json")]
public class JsonNetTests(string dataTypeName) : TestBase
{
[Test]
public Task Roundtrip_object()
=> AssertType(
JsonDataSource,
new Foo { Bar = 8 },
IsJsonb ? @"{""Bar"": 8}" : @"{""Bar"":8}",
dataTypeName, dataTypeInference: DataTypeInference.Nothing,
valueTypeEqualsFieldType: false);
[Test, IssueLink("https://github.com/npgsql/npgsql/issues/3085")]
public Task Roundtrip_string()
=> AssertType(
JsonDataSource,
@"{""p"": 1}",
@"{""p"": 1}",
dataTypeName, dataTypeInference: DataTypeInference.Mismatch,
dbType: new(DbType.Object, DbType.String));
[Test, IssueLink("https://github.com/npgsql/npgsql/issues/3085")]
public Task Roundtrip_char_array()
=> AssertType(
JsonDataSource,
@"{""p"": 1}".ToCharArray(),
@"{""p"": 1}",
dataTypeName, dataTypeInference: DataTypeInference.Mismatch,
dbType: new(DbType.Object, DbType.String), valueTypeEqualsFieldType: false);
[Test, IssueLink("https://github.com/npgsql/npgsql/issues/3085")]
public Task Roundtrip_byte_array()
=> AssertType(
JsonDataSource,
@"{""p"": 1}"u8.ToArray(),
@"{""p"": 1}",
dataTypeName, dataTypeInference: DataTypeInference.Mismatch,
dbType: new(DbType.Object, DbType.Binary), valueTypeEqualsFieldType: false);
[Test]
public Task Roundtrip_JObject()
=> AssertType(
JsonDataSource,
new JObject { ["Bar"] = 8 },
IsJsonb ? @"{""Bar"": 8}" : @"{""Bar"":8}",
dataTypeName, dataTypeInference: DataTypeInference.Nothing,
valueTypeEqualsFieldType: false);
[Test]
public Task Roundtrip_JArray()
=> AssertType(
JsonDataSource,
new JArray(new[] { 1, 2, 3 }),
IsJsonb ? "[1, 2, 3]" : "[1,2,3]",
dataTypeName, dataTypeInference: DataTypeInference.Nothing,
valueTypeEqualsFieldType: false);
[Test]
public async Task Deserialize_failure()
{
await using var conn = await JsonDataSource.OpenConnectionAsync();
await using var cmd = new NpgsqlCommand($@"SELECT '[1, 2, 3]'::{dataTypeName}", conn);
await using var reader = await cmd.ExecuteReaderAsync();
await reader.ReadAsync();
// Attempt to deserialize JSON array into object
Assert.That(() => reader.GetFieldValue<Foo>(0), Throws.TypeOf<JsonSerializationException>());
// State should still be OK to continue
var actual = reader.GetFieldValue<JArray>(0);
Assert.That((int)actual[0], Is.EqualTo(1));
}
[Test]
public async Task Clr_type_mapping()
{
var dataSourceBuilder = CreateDataSourceBuilder();
if (IsJsonb)
dataSourceBuilder.UseJsonNet(jsonbClrTypes: [typeof(Foo)]);
else
dataSourceBuilder.UseJsonNet(jsonClrTypes: [typeof(Foo)]);
await using var dataSource = dataSourceBuilder.Build();
await AssertType(
dataSource,
new Foo { Bar = 8 },
IsJsonb ? @"{""Bar"": 8}" : @"{""Bar"":8}",
dataTypeName,
dataTypeInference: DataTypeInference.Nothing, valueTypeEqualsFieldType: false);
}
[Test]
public async Task Roundtrip_clr_array()
{
var dataSourceBuilder = CreateDataSourceBuilder();
if (IsJsonb)
dataSourceBuilder.UseJsonNet(jsonbClrTypes: [typeof(int[])]);
else
dataSourceBuilder.UseJsonNet(jsonClrTypes: [typeof(int[])]);
await using var dataSource = dataSourceBuilder.Build();
await AssertType(
dataSource,
new[] { 1, 2, 3 },
IsJsonb ? "[1, 2, 3]" : "[1,2,3]",
dataTypeName, dataTypeInference: DataTypeInference.Mismatch,
valueTypeEqualsFieldType: false, skipArrayCheck: true); // there is no value only mapping for int[][]
}
class DateWrapper
{
public DateTime Date;
public override bool Equals(object? obj) => (obj as DateWrapper)?.Date == Date;
public override int GetHashCode() => Date.GetHashCode();
}
[Test]
public async Task Custom_serializer_settings()
{
var settings = new JsonSerializerSettings { DateFormatString = @"T\he d\t\h o\f MMMM, yyyy" };
var dataSourceBuilder = CreateDataSourceBuilder();
if (IsJsonb)
dataSourceBuilder.UseJsonNet(jsonbClrTypes: [typeof(DateWrapper)], settings: settings);
else
dataSourceBuilder.UseJsonNet(jsonClrTypes: [typeof(DateWrapper)], settings: settings);
await using var dataSource = dataSourceBuilder.Build();
await AssertType(
dataSource,
new DateWrapper { Date = new DateTime(2018, 04, 20) },
IsJsonb ? "{\"Date\": \"The 20th of April, 2018\"}" : "{\"Date\":\"The 20th of April, 2018\"}",
dataTypeName,
dataTypeInference: DataTypeInference.Nothing, valueTypeEqualsFieldType: false);
}
[Test]
public async Task Bug3464()
{
var dataSourceBuilder = CreateDataSourceBuilder();
dataSourceBuilder.UseJsonNet(jsonbClrTypes: [typeof(Bug3464Class)]);
await using var dataSource = dataSourceBuilder.Build();
var expected = new Bug3464Class { SomeString = new string('5', 8174) };
await using var conn = await dataSource.OpenConnectionAsync();
await using var cmd = new NpgsqlCommand(@"SELECT @p1, @p2", conn);
cmd.Parameters.AddWithValue("p1", expected).DataTypeName = dataTypeName;
cmd.Parameters.AddWithValue("p2", expected).DataTypeName = dataTypeName;
await using var reader = cmd.ExecuteReader();
}
public class Bug3464Class
{
public string? SomeString { get; set; }
}
[Test, IssueLink("https://github.com/npgsql/npgsql/issues/5475")]
public async Task Read_jarray_from_get_value()
{
await using var conn = await JsonDataSource.OpenConnectionAsync();
await using var cmd = new NpgsqlCommand { Connection = conn };
var json = new JArray(new JObject { { "name", "value1" } });
cmd.CommandText = $"SELECT @p";
cmd.Parameters.Add(new("p", json));
await cmd.ExecuteScalarAsync();
}
[Test]
public async Task Write_jobject_without_npgsqldbtype()
{
await using var conn = await JsonDataSource.OpenConnectionAsync();
var tableName = await TestUtil.CreateTempTable(conn, "key SERIAL PRIMARY KEY, ingredients json");
await using var cmd = new NpgsqlCommand { Connection = conn };
var jsonObject = new JObject
{
{ "name", "value1" },
{ "amount", 1 },
{ "unit", "ml" }
};
cmd.CommandText = $"INSERT INTO {tableName} (ingredients) VALUES (@p)";
cmd.Parameters.Add(new("p", jsonObject));
await cmd.ExecuteNonQueryAsync();
}
[Test, IssueLink("https://github.com/npgsql/npgsql/issues/4537")]
public async Task Write_jobject_array_without_npgsqldbtype()
{
await using var conn = await JsonDataSource.OpenConnectionAsync();
var tableName = await TestUtil.CreateTempTable(conn, "key SERIAL PRIMARY KEY, ingredients json[]");
await using var cmd = new NpgsqlCommand { Connection = conn };
var jsonObject1 = new JObject
{
{ "name", "value1" },
{ "amount", 1 },
{ "unit", "ml" }
};
var jsonObject2 = new JObject
{
{ "name", "value2" },
{ "amount", 2 },
{ "unit", "g" }
};
cmd.CommandText = $"INSERT INTO {tableName} (ingredients) VALUES (@p)";
cmd.Parameters.Add(new("p", new[] { jsonObject1, jsonObject2 }));
await cmd.ExecuteNonQueryAsync();
}
class Foo
{
public int Bar { get; set; }
public override bool Equals(object? obj) => (obj as Foo)?.Bar == Bar;
public override int GetHashCode() => Bar.GetHashCode();
}
[OneTimeSetUp]
public void SetUp()
{
var dataSourceBuilder = CreateDataSourceBuilder();
dataSourceBuilder.UseJsonNet();
JsonDataSource = dataSourceBuilder.Build();
}
[OneTimeTearDown]
public async Task Teardown()
=> await JsonDataSource.DisposeAsync();
bool IsJsonb => dataTypeName == "jsonb";
NpgsqlDataSource JsonDataSource = default!;
}