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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-45603] Enhance MockDBClientConnection for OplogFetcher unit testing</title>
                <link>https://jira.mongodb.org/browse/SERVER-45603</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;After &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45468&quot; title=&quot;Create a DBClientCursor in the new oplog fetcher&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45468&quot;&gt;&lt;del&gt;SERVER-45468&lt;/del&gt;&lt;/a&gt;, the new OplogFetcher will be using &lt;tt&gt;DBClientConnection&lt;/tt&gt; and &lt;tt&gt;DBClientCursor&lt;/tt&gt; for oplog fetching. In order to convert the unit tests, we need a way to intercept outgoing client requests and to simulate network responses.&lt;/p&gt;

&lt;p&gt;The &lt;tt&gt;MockDBClientConnection&lt;/tt&gt; already implements the &lt;tt&gt;query&lt;/tt&gt; and &lt;tt&gt;runCommandWithTarget&lt;/tt&gt; mock, which are used by the initial sync cloner tests. But for the new OplogFetcher, it doesn&apos;t use these APIs. For oplog fetching using exhaust cursors,  it mostly uses the &lt;tt&gt;call()&lt;/tt&gt; and &lt;tt&gt;recv()&lt;/tt&gt; APIs.&lt;/p&gt;

&lt;p&gt;So in this ticket, we will implement &lt;tt&gt;call()&lt;/tt&gt; and &lt;tt&gt;recv()&lt;/tt&gt; so that we can:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;intercept outgoing client requests&lt;/li&gt;
	&lt;li&gt;simulate network responses (for both &lt;tt&gt;call()&lt;/tt&gt; and &lt;tt&gt;recv()&lt;/tt&gt;)&lt;/li&gt;
	&lt;li&gt;allow network operations be blocked waiting for mock responses&lt;/li&gt;
	&lt;li&gt;know if the &lt;tt&gt;MockDBClientConnection&lt;/tt&gt; is blocked on network operations&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1099265">SERVER-45603</key>
            <summary>Enhance MockDBClientConnection for OplogFetcher unit testing</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="lingzhi.deng@mongodb.com">Lingzhi Deng</assignee>
                                    <reporter username="lingzhi.deng@mongodb.com">Lingzhi Deng</reporter>
                        <labels>
                    </labels>
                <created>Thu, 16 Jan 2020 15:39:33 +0000</created>
                <updated>Sun, 29 Oct 2023 22:13:12 +0000</updated>
                            <resolved>Fri, 17 Jan 2020 01:56:54 +0000</resolved>
                                                    <fixVersion>4.3.3</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2737024" author="xgen-internal-githook" created="Fri, 17 Jan 2020 00:39:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;ldennis&apos;, &apos;name&apos;: &apos;Lingzhi Deng&apos;, &apos;email&apos;: &apos;lingzhi.deng@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45603&quot; title=&quot;Enhance MockDBClientConnection for OplogFetcher unit testing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45603&quot;&gt;&lt;del&gt;SERVER-45603&lt;/del&gt;&lt;/a&gt;: Enhance MockDBClientConnection for OplogFetcher unit testing&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a059b32452e7a5775e60c1b616249cf4dec438a9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a059b32452e7a5775e60c1b616249cf4dec438a9&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1081980">SERVER-45431</issuekey>
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