88 lines
2.8 KiB
C#
88 lines
2.8 KiB
C#
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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
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namespace System.Data.Entity
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{
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using System.Data.Common;
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using Xunit;
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public class ConnectionEventsTracker
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{
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private int countOpenClose;
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private int countCloseOpen;
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private int countOtherConnectionStates;
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public ConnectionEventsTracker(DbConnection connection)
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{
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if (connection == null)
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{
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throw new ArgumentException("Cannot track events for a null connection!");
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}
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connection.StateChange += OnStateChange;
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}
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/// <summary>
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/// Verifies the no connection events were fired.
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/// </summary>
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public void VerifyNoConnectionEventsWereFired()
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{
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Assert.True(countOpenClose == 0);
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Assert.True(countCloseOpen == 0);
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Assert.True(countOtherConnectionStates == 0);
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}
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/// <summary>
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/// Verifies the connection open and close events were fired.
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/// </summary>
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public void VerifyConnectionOpenCloseEventsWereFired()
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{
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Assert.True(countCloseOpen == 1);
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Assert.True(countOpenClose == 1);
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Assert.True(countOtherConnectionStates == 0);
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}
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/// <summary>
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/// Verifies the connection opened event was fired.
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/// </summary>
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public void VerifyConnectionOpenedEventWasFired()
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{
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Assert.True(countCloseOpen == 1);
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Assert.True(countOpenClose == 0);
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Assert.True(countOtherConnectionStates == 0);
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}
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/// <summary>
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/// Verifies the connection closed event was fired.
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/// </summary>
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public void VerifyConnectionClosedEventWasFired()
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{
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Assert.True(countOpenClose == 1);
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Assert.True(countCloseOpen == 0);
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Assert.True(countOtherConnectionStates == 0);
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}
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public void ResetEventCounters()
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{
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countOpenClose = countCloseOpen = countOtherConnectionStates = 0;
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}
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private void OnStateChange(object sender, StateChangeEventArgs args)
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{
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if (args.OriginalState == ConnectionState.Closed
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&& args.CurrentState == ConnectionState.Open)
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{
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countCloseOpen++;
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}
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else if (args.OriginalState == ConnectionState.Open
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&& args.CurrentState == ConnectionState.Closed)
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{
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countOpenClose++;
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}
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else
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{
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countOtherConnectionStates++;
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}
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}
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}
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}
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