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AK: Fix logic in String::operator>(const String&)

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Null strings should not compare greater than non-null strings.

Add tests for >, <, >=, and <= comparison involving null strings.
This commit is contained in:
Matt Jacobson 2022-01-14 22:24:34 -05:00 committed by Andreas Kling
parent c74f75b910
commit 47e8d58553
Notes: sideshowbarker 2024-07-17 20:46:54 +09:00 
Author: https://github.com/mhjacobson
Commit: https://github.com/SerenityOS/serenity/commit/47e8d585538
Pull-request: https://github.com/SerenityOS/serenity/pull/11903
2 changed files with 17 additions and 4 deletions
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6
AK/String.cpp
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@ -58,10 +58,10 @@ bool String::operator<(const String& other) const
bool String::operator>(const String& other) const
{
if (!m_impl)
return other.m_impl;
if (!other.m_impl)
return m_impl;
if (!m_impl)
return false;
return strcmp(characters(), other.characters()) > 0;

15
Tests/AK/TestString.cpp
View file

@ -42,7 +42,6 @@ TEST_CASE(construct_contents)
TEST_CASE(compare)
{
String test_string = "ABCDEF";
EXPECT("a" < String("b"));
EXPECT(!("a" > String("b")));
EXPECT("b" > String("a"));
@ -51,6 +50,20 @@ TEST_CASE(compare)
EXPECT(!("a" >= String("b")));
EXPECT("a" <= String("a"));
EXPECT(!("b" <= String("a")));
EXPECT(String("a") > String());
EXPECT(!(String() > String("a")));
EXPECT(String() < String("a"));
EXPECT(!(String("a") < String()));
EXPECT(String("a") >= String());
EXPECT(!(String() >= String("a")));
EXPECT(String() <= String("a"));
EXPECT(!(String("a") <= String()));
EXPECT(!(String() > String()));
EXPECT(!(String() < String()));
EXPECT(String() >= String());
EXPECT(String() <= String());
}
TEST_CASE(index_access)