Incorrect return value when using WireMock.Net with web service #397

New Issue

adam · 2025-12-29T15:22:46+01:00

adam commented

2025-12-29 15:22:46 +01:00

Originally created by @gpetrounrt on GitHub (Jan 26, 2022).

Clone https://github.com/gpetrounrt/WireMockWithVies and check https://github.com/gpetrounrt/WireMockWithVies/blob/main/WireMockWithVies/WireMockWithViesTest.cs
If I use "http://ec.europa.eu/taxation_customs/vies/services/checkVatService" as parameter in checkVatPortTypeClient to communicate with the corresponding WebService, I get back the expected exception message since the checkVatRequest input is invalid.
If I use http://localhost:15000/ instead as parameter in checkVatPortTypeClient, I get back a web page instead of the expected exception message.
Any idea what might be wrong in this case? Perhaps I am not using correct WireMockServerSettings? Or this might be a bug when trying to use a web service?

Originally created by @gpetrounrt on GitHub (Jan 26, 2022). Clone https://github.com/gpetrounrt/WireMockWithVies and check https://github.com/gpetrounrt/WireMockWithVies/blob/main/WireMockWithVies/WireMockWithViesTest.cs If I use "http://ec.europa.eu/taxation_customs/vies/services/checkVatService" as parameter in checkVatPortTypeClient to communicate with the corresponding WebService, I get back the expected exception message since the checkVatRequest input is invalid. If I use http://localhost:15000/ instead as parameter in checkVatPortTypeClient, I get back a web page instead of the expected exception message. Any idea what might be wrong in this case? Perhaps I am not using correct WireMockServerSettings? Or this might be a bug when trying to use a web service?

adam added the question label 2025-12-29 15:22:46 +01:00

adam closed this issue

2025-12-29 15:22:46 +01:00

adam commented

2025-12-29 15:22:47 +01:00

@StefH commented on GitHub (Jan 26, 2022):

@gpetrounrt

The code should be like:

[Fact]
public async Task WireMockWithVies_ShouldReturnFalse()
{
    var wireMockServerSettings = new WireMockServerSettings()
    {
        StartAdminInterface = true,
        ProxyAndRecordSettings = new ProxyAndRecordSettings
        {
            Url = "http://ec.europa.eu",
            SaveMapping = true,
            SaveMappingToFile = true,
            AllowAutoRedirect = true
        }
    };

    var wireMockServer = WireMockServer.Start(wireMockServerSettings);

    checkVatPortTypeClient client = new checkVatPortTypeClient(checkVatPortTypeClient.EndpointConfiguration.checkVatPort, $"{wireMockServer.Urls[0]}/taxation_customs/vies/services/checkVatService");
    checkVatRequest request = new("GR", "123456789");
    var exception = await Record.ExceptionAsync(() => client.checkVatAsync(request));

    wireMockServer.Stop();

    Assert.Equal("INVALID_INPUT", exception.Message);
}

When calling using wiremock as a proxy, make sure that your client calls wiremock (and then wiremock will call the real URL)
And only provide the hostname, not the full url
In Unit tests, do not assign a fixed url to wiremock, you are not 100% sure that that url+port is free, better to let wiremock create a dynamic port.

@StefH commented on GitHub (Jan 26, 2022): @gpetrounrt The code should be like: ``` c# [Fact] public async Task WireMockWithVies_ShouldReturnFalse() { var wireMockServerSettings = new WireMockServerSettings() { StartAdminInterface = true, ProxyAndRecordSettings = new ProxyAndRecordSettings { Url = "http://ec.europa.eu", SaveMapping = true, SaveMappingToFile = true, AllowAutoRedirect = true } }; var wireMockServer = WireMockServer.Start(wireMockServerSettings); checkVatPortTypeClient client = new checkVatPortTypeClient(checkVatPortTypeClient.EndpointConfiguration.checkVatPort, $"{wireMockServer.Urls[0]}/taxation_customs/vies/services/checkVatService"); checkVatRequest request = new("GR", "123456789"); var exception = await Record.ExceptionAsync(() => client.checkVatAsync(request)); wireMockServer.Stop(); Assert.Equal("INVALID_INPUT", exception.Message); } ``` 1. When calling using wiremock as a proxy, make sure that your client calls wiremock (and then wiremock will call the real URL) 2. And only provide the hostname, not the full url 2. In Unit tests, do not assign a fixed url to wiremock, you are not 100% sure that that url+port is free, better to let wiremock create a dynamic port.

adam commented

2025-12-29 15:22:48 +01:00

@gpetrounrt commented on GitHub (Jan 27, 2022):

Thank you very much for the reply and the best practices information. I completely forgot that the Url should have the hostname. I have applied your suggestions and it works as expected.

@gpetrounrt commented on GitHub (Jan 27, 2022): Thank you very much for the reply and the best practices information. I completely forgot that the Url should have the hostname. I have applied your suggestions and it works as expected.

adam referenced this issue

2025-12-29 15:34:03 +01:00

[PR #398] [MERGED] Feature/xpath transformer #893

Sign in to join this conversation.

Branches Tags

master

mime-part-matcher

version-2.x

MappingSerializer

1341-mapping-json

stef-aspire-tests-updates

bug/973-TinyMapper

bug/1149-AppendGuidToSavedMappingFile

feature/1150-DockerImageVersion

61

stef-1108

stef-1097

stef-1083-MessageOptions_Type_Conflict

stef-1062-logger

stef-IgnoreOpenApiErrors

stef-928-TypeLoadException-FluentAssertions-net472

nunit

stef-849

stef-847-regex-questionmark

http_verb

WireMockServerContext

webapp

ai

CommandLineArgumentsParser

1 Participants

Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: starred/WireMock.Net-wiremock#397