Joseph Doherty
93 lines
3.3 KiB
C#
93 lines
3.3 KiB
C#
using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Protocol;
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using ZB.MOM.WW.ScadaBridge.DataConnectionLayer.Adapters;
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namespace ZB.MOM.WW.ScadaBridge.DataConnectionLayer.Tests;
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/// <summary>
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/// M7-B2 (T15): <see cref="StubOpcUaClient"/> serves a small canned address-space
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/// tree so DCL browse/paging flows can be exercised without a live OPC UA server.
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/// The stub also fakes BrowseNext continuation paging on <c>Folder1</c> so the
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/// continuation-token round-trip is testable end-to-end against the contract.
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/// </summary>
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public class StubOpcUaClientBrowseTests
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{
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// StubOpcUaClient is internal; reached here via InternalsVisibleTo on the
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// DataConnectionLayer assembly (the test project is already a friend, since
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// other tests in this project new up internal adapter types).
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private static async Task<IOpcUaClient> ConnectedStubAsync()
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{
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var client = new StubOpcUaClient();
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await client.ConnectAsync("opc.tcp://stub", null, CancellationToken.None);
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return client;
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}
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[Fact]
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public async Task BrowseRoot_ReturnsTwoFolders_NoContinuation()
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{
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await using var client = (StubOpcUaClient)await ConnectedStubAsync();
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var result = await client.BrowseChildrenAsync(parentNodeId: null);
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Assert.False(result.Truncated);
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Assert.Null(result.ContinuationToken);
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Assert.Collection(
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result.Children,
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n =>
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{
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Assert.Equal("Folder1", n.DisplayName);
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Assert.Equal(BrowseNodeClass.Object, n.NodeClass);
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Assert.True(n.HasChildren);
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},
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n =>
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{
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Assert.Equal("Folder2", n.DisplayName);
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Assert.Equal(BrowseNodeClass.Object, n.NodeClass);
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Assert.False(n.HasChildren);
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});
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}
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[Fact]
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public async Task BrowseFolder1_NoToken_ReturnsTag1_AndContinuationToken()
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{
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await using var client = (StubOpcUaClient)await ConnectedStubAsync();
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var result = await client.BrowseChildrenAsync(parentNodeId: "Folder1");
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Assert.True(result.Truncated);
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Assert.Equal("STUB_PAGE2", result.ContinuationToken);
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var only = Assert.Single(result.Children);
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Assert.Equal("Tag1", only.DisplayName);
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Assert.Equal(BrowseNodeClass.Variable, only.NodeClass);
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Assert.False(only.HasChildren);
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}
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[Fact]
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public async Task BrowseFolder1_WithContinuationToken_ReturnsTag2_AndNoFurtherContinuation()
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{
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await using var client = (StubOpcUaClient)await ConnectedStubAsync();
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var result = await client.BrowseChildrenAsync(
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parentNodeId: "Folder1",
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continuationToken: "STUB_PAGE2");
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Assert.False(result.Truncated);
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Assert.Null(result.ContinuationToken);
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var only = Assert.Single(result.Children);
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Assert.Equal("Tag2", only.DisplayName);
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Assert.Equal(BrowseNodeClass.Variable, only.NodeClass);
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Assert.False(only.HasChildren);
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}
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[Fact]
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public async Task BrowseLeaf_ReturnsEmpty_NoContinuation()
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{
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await using var client = (StubOpcUaClient)await ConnectedStubAsync();
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var result = await client.BrowseChildrenAsync(parentNodeId: "Folder2");
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Assert.False(result.Truncated);
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Assert.Null(result.ContinuationToken);
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Assert.Empty(result.Children);
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}
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}
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