72 lines
2.2 KiB
C#
72 lines
2.2 KiB
C#
using FluentAssertions;
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using System;
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using System.Linq;
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using Xunit;
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namespace Wasmtime.Tests
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{
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public class FunctionThunkingFixture : ModuleFixture
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{
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protected override string ModuleFileName => "FunctionThunking.wasm";
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}
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public class FunctionThunkingTests : IClassFixture<FunctionThunkingFixture>
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{
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const string THROW_MESSAGE = "Test error messages for wasmtime dotnet bidnings unit tests.";
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class MyHost : IHost
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{
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public Instance Instance { get; set; }
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[Import("add", Module = "env")]
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public int Add(int x, int y) => x + y;
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[Import("do_throw", Module = "env")]
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public void Throw() => throw new Exception(THROW_MESSAGE);
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}
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public FunctionThunkingTests(FunctionThunkingFixture fixture)
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{
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Fixture = fixture;
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}
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private FunctionThunkingFixture Fixture { get; }
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[Fact]
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public void ItBindsImportMethodsAndCallsThemCorrectly()
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{
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var host = new MyHost();
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using (var instance = Fixture.Module.Instantiate(host))
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{
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var add_func = instance.Externs.Functions.Where(f => f.Name == "add_wrapper").Single();
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int invoke_add(int x, int y) => (int)add_func.Invoke(new object[] { x, y });
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invoke_add(40, 2).Should().Be(42);
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invoke_add(22, 5).Should().Be(27);
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//Collect garbage to make sure delegate function pointers pasted to wasmtime are rooted.
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GC.Collect();
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GC.WaitForPendingFinalizers();
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invoke_add(1970, 50).Should().Be(2020);
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}
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}
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[Fact]
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public void ItPropegatesExceptionsToCallersViaTraps()
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{
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var host = new MyHost();
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using (var instance = Fixture.Module.Instantiate(host))
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{
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var throw_func = instance.Externs.Functions.Where(f => f.Name == "do_throw_wrapper").Single();
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Action action = () => throw_func.Invoke();
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action
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.Should()
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.Throw<TrapException>()
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.WithMessage(THROW_MESSAGE);
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}
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}
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}
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}
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