26 lines
1.5 KiB
C#
26 lines
1.5 KiB
C#
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namespace Elsa.Bpmn.Interchange.IntegrationTests.Support;
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/// <summary>
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/// Reads a fixture from the <c>Assets</c> directory shipped alongside this test project — the one place every test
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/// that needs a BPMN document body goes through, rather than each duplicating its own <see cref="Path.Combine"/> call.
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/// </summary>
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internal static class BpmnAssetReader
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{
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/// <summary>Reads a fixture from the <c>Assets</c> directory shipped alongside this test project.</summary>
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/// <param name="fileName">A plain file name (no directory segments) of a fixture under <c>Assets</c>.</param>
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/// <exception cref="ArgumentException">
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/// <paramref name="fileName"/> is rooted or contains a path segment, which could otherwise resolve outside the
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/// <c>Assets</c> directory. The guard below makes this defence-in-depth rather than the only thing standing
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/// between the code and a wrong path: <see cref="Path.Join(string,string,string)"/> — used instead of
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/// <see cref="Path.Combine(string,string,string)"/> below — does not discard earlier segments when a later one
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/// looks rooted.
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/// </exception>
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public static string Read(string fileName)
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{
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if (Path.IsPathRooted(fileName) || fileName.Split('/', '\\').Length > 1)
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throw new ArgumentException($"'{fileName}' must be a plain file name, not a rooted or nested path.", nameof(fileName));
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return File.ReadAllText(Path.Join(AppContext.BaseDirectory, "Assets", fileName));
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}
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}
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