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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-14106] Implement expectDeath enhancements for unit testing</title>
                <link>https://jira.mongodb.org/browse/SERVER-14106</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;To allow for full code coverage of fassert() calls in C++ unit tests.&lt;/p&gt;</description>
                <environment></environment>
        <key id="139362">SERVER-14106</key>
            <summary>Implement expectDeath enhancements for unit testing</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="3">Duplicate</resolution>
                                        <assignee username="schwerin@mongodb.com">Andy Schwerin</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Fri, 30 May 2014 18:36:01 +0000</created>
                <updated>Fri, 11 Dec 2015 06:47:09 +0000</updated>
                            <resolved>Fri, 11 Dec 2015 06:46:56 +0000</resolved>
                                                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1111785" author="kamran.khan" created="Fri, 11 Dec 2015 06:46:56 +0000"  >&lt;p&gt;I believe this functionality is now supported by the DEATH_TEST* macros that were added as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19005&quot; title=&quot;Support C++ death tests which test that the process terminates abnormally&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19005&quot;&gt;&lt;del&gt;SERVER-19005&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="608422" author="acm" created="Wed, 4 Jun 2014 18:25:37 +0000"  >&lt;p&gt;Ah, I see. I think we were talking about slightly different things. The problem that we encountered more frequently when converting was that there would be functions using non-void return types that used ASSERT/FAIL, and those would not compile.&lt;/p&gt;

&lt;p&gt;For the issue you are pointing out, this seems to be explicitly intended behavior. This seems to be how to cope: &lt;a href=&quot;https://code.google.com/p/googletest/wiki/AdvancedGuide#Propagating_Fatal_Failures&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://code.google.com/p/googletest/wiki/AdvancedGuide#Propagating_Fatal_Failures&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="608396" author="schwerin" created="Wed, 4 Jun 2014 18:05:04 +0000"  >&lt;p&gt;If FAIL doesn&apos;t work, then ASSERT_ doesn&apos;t, either, I suspect.  The problem is that ASSERT_* in googletest devolves to return, which has the effect of converting ASSERTs inside function calls into EXPECTs with some caveats.&lt;/p&gt;

&lt;p&gt;For example,&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;void myAssert(...) {&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    ASSERT_GT(...);&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;TEST(A, B) {&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  myAssert(...);&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  FAIL(&quot;Should only be reachable if myAssert passes&quot;)&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;I posit that TEST(A, B) will always call FAIL, regardless of whether or not the assert in myAssert passes.&lt;/p&gt;</comment>
                            <comment id="608375" author="acm" created="Wed, 4 Jun 2014 17:57:48 +0000"  >&lt;p&gt;I think that ASSERT_* works ok, but FAIL doesn&apos;t work in functions that return something other than void, from what I remember. That was a bit of a pain, but there really weren&apos;t that many instances of FAIL.&lt;/p&gt;

&lt;p&gt;For some evidence that ASSERT_ works ok, here is a function using ASSERT_ in the C++ driver unit tests: &lt;a href=&quot;https://github.com/mongodb/mongo-cxx-driver/blob/legacy/src/mongo/base/parse_number_test.cpp#L48&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-cxx-driver/blob/legacy/src/mongo/base/parse_number_test.cpp#L48&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="608312" author="schwerin" created="Wed, 4 Jun 2014 17:35:32 +0000"  >&lt;p&gt;Not that radical.  Currently the unittest framework drives test.exe, which is why I went the current route two years ago, but that&apos;s a diminishing fraction of our tests, now, so I&apos;d be ready to move away.  It used to be that you couldn&apos;t use ASSERT_* macros productively inside of function calls, because they just returned to the caller.  Is that better, now?&lt;/p&gt;</comment>
                            <comment id="607905" author="acm" created="Wed, 4 Jun 2014 15:59:16 +0000"  >&lt;p&gt;As a somewhat radical suggestion or though experiment: we could just move to googletest and get that for free. Our existing unit tests are almost directly portable. The C++ driver switched, the shim that we wrote to make our existing C++ unit tests work: &lt;a href=&quot;https://github.com/mongodb/mongo-cxx-driver/blob/legacy/src/mongo/unittest/unittest.h&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-cxx-driver/blob/legacy/src/mongo/unittest/unittest.h&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="211114">SERVER-19005</issuekey>
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