2017-05-01 13:37:16 -06:00
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/* Copyright (C) 2017 Mike Fleetwood
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/* Test BlockSpecial
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*
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* In order to make the tests runable by non-root users in a wide
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* variety of environments as possible the tests try to assume as small
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* a set of available files as possible and discovers used block device
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* names and symbolic link name. The following files are explicitly
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* needed for the tests:
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*
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* Name Access Note
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* ------------------------- ------- -----
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* / Stat
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2017-05-07 07:06:17 -06:00
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* /proc/partitions Stat
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* Read To find any two block
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2017-05-01 13:37:16 -06:00
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* devices
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* /dev/BLOCK0 Stat First entry from
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* /proc/partitions
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* /dev/BLOCK1 stat Second entry from
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* /proc/partitions
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* /dev/disk/by-path/ Readdir To find any symlink to a
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* block device
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* /dev/disk/by-path/SYMLINK Stat First directory entry
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* /dev/RBLOCK Stat Device to which SYMLINK
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* refers
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*
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* Other dummy names are pre-loaded into the internal BlockSpecial cache
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* and never queried from the file system.
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*/
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#include "BlockSpecial.h"
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#include "gtest/gtest.h"
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#include <string>
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#include <iostream>
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#include <fstream>
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#include <stdio.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glibmm/ustring.h>
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namespace GParted
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{
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// Print method for a BlockSpecial object
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std::ostream& operator<<( std::ostream & out, const BlockSpecial & bs )
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{
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out << "BlockSpecial{\"" << bs.m_name << "\"," << bs.m_major << "," << bs.m_minor << "}";
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return out;
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}
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// Helper to construct and return message for equality assertion used in:
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// EXPECT_BSEQTUP( bs, name, major, minor )
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// Reference:
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// Google Test, AdvancedGuide, Using a Predicate-Formatter
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::testing::AssertionResult CompareHelperBS2TUP( const char * bs_expr, const char * name_expr,
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const char * major_expr, const char * minor_expr,
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const BlockSpecial & bs, const Glib::ustring & name,
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unsigned long major, unsigned long minor )
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{
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if ( bs.m_name == name && bs.m_major == major && bs.m_minor == minor )
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return ::testing::AssertionSuccess();
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else
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return ::testing::AssertionFailure()
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<< " Expected: " << bs_expr << "\n"
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<< " Which is: " << bs << "\n"
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<< "To be equal to: (" << name_expr << "," << major_expr << "," << major_expr << ")";
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}
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// Nonfatal assertion that BlockSpecial is equal to tuple (name, major, minor)
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#define EXPECT_BSEQTUP(bs, name, major, minor) \
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EXPECT_PRED_FORMAT4(CompareHelperBS2TUP, bs, name, major, minor)
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// Return block device names numbered 0 upwards like "/dev/sda" by reading entries from
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// /proc/partitions.
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static std::string get_block_name( unsigned want )
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{
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std::ifstream proc_partitions( "/proc/partitions" );
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if ( ! proc_partitions )
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{
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ADD_FAILURE() << __func__ << "(): Failed to open '/proc/partitions'";
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return "";
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}
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std::string line;
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char name[100] = "";
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unsigned entry = 0;
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while ( getline( proc_partitions, line ) )
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{
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if ( sscanf( line.c_str(), "%*u %*u %*u %99s", name ) == 1 )
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{
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if ( entry == want )
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break;
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entry ++;
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}
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}
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proc_partitions.close();
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if ( entry == want )
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return std::string( "/dev/" ) + name;
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ADD_FAILURE() << __func__ << "(): Entry " << want << " not found in '/proc/partitions'";
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return "";
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}
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// Return symbolic link to a block device by reading the first entry in the directory
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// /dev/disk/by-path/.
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static std::string get_link_name()
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{
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DIR * dir = opendir( "/dev/disk/by-path" );
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if ( dir == NULL )
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{
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ADD_FAILURE() << __func__ << "(): Failed to open directory '/dev/disk/by-path'";
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return "";
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}
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bool found = false;
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struct dirent * dentry;
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// Silence GCC [-Wparentheses] warning with double parentheses
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while ( ( dentry = readdir( dir ) ) )
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{
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if ( strcmp( dentry->d_name, "." ) != 0 &&
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strcmp( dentry->d_name, ".." ) != 0 )
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{
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found = true;
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break;
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}
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}
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closedir( dir );
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if ( found )
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return std::string( "/dev/disk/by-path/" ) + dentry->d_name;
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ADD_FAILURE() << __func__ << "(): No entries found in directory '/dev/disk/by-path'";
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return "";
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}
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// Follow symbolic link return real path.
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static std::string follow_link_name( std::string link )
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{
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char * rpath = realpath( link.c_str(), NULL );
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if ( rpath == NULL )
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{
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ADD_FAILURE() << __func__ << "(): Failed to resolve symbolic link '" << link << "'";
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return "";
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}
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std::string rpath_copy = rpath;
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free( rpath );
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return rpath_copy;
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}
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TEST( BlockSpecialTest, UnnamedBlockSpecialObject )
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{
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// Test default constructor produces empty BlockSpecial object ("", 0, 0).
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BlockSpecial::clear_cache();
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BlockSpecial bs;
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EXPECT_BSEQTUP( bs, "", 0, 0 );
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}
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TEST( BlockSpecialTest, NamedBlockSpecialObjectPlainFile )
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{
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// Test any named plain file or directory (actually any non-block special name)
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// produces BlockSpecial object (name, 0, 0).
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BlockSpecial::clear_cache();
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BlockSpecial bs( "/" );
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EXPECT_BSEQTUP( bs, "/", 0, 0 );
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}
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TEST( BlockSpecialTest, NamedBlockSpecialObjectPlainFileDuplicate )
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{
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// Test second constructed BlockSpecial object with the same named plain file or
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// directory, where the major and minor numbers are retrieved via internal
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// BlockSpecial cache, produce an equivalent object (name, 0, 0).
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BlockSpecial::clear_cache();
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BlockSpecial bs1( "/" );
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BlockSpecial bs2( "/" );
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EXPECT_BSEQTUP( bs1, "/", 0, 0 );
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EXPECT_BSEQTUP( bs2, "/", 0, 0 );
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}
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TEST( BlockSpecialTest, NamedBlockSpecialObjectBlockDevice )
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{
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std::string bname = get_block_name( 0 );
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// Test any block special name produces BlockSpecial object (name, major, minor).
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BlockSpecial::clear_cache();
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BlockSpecial bs( bname );
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EXPECT_STREQ( bs.m_name.c_str(), bname.c_str() );
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EXPECT_TRUE( bs.m_major > 0 || bs.m_minor > 0 );
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}
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TEST( BlockSpecialTest, NamedBlockSpecialObjectBlockDeviceDuplicate )
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{
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std::string bname = get_block_name( 0 );
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// Test that a second object with the same name of a block device produces the
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// same (name, major, minor). Checking internal BlockSpecial caching again.
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BlockSpecial::clear_cache();
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BlockSpecial bs1( bname );
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BlockSpecial bs2( bname );
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EXPECT_STREQ( bs1.m_name.c_str(), bs2.m_name.c_str() );
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EXPECT_EQ( bs1.m_major, bs2.m_major );
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EXPECT_EQ( bs1.m_minor, bs2.m_minor );
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}
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TEST( BlockSpecialTest, TwoNamedBlockSpecialObjectBlockDevices )
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{
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std::string bname1 = get_block_name( 0 );
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std::string bname2 = get_block_name( 1 );
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// Test that two different named block devices produce different
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// (name, major, minor).
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BlockSpecial::clear_cache();
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BlockSpecial bs1( bname1 );
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BlockSpecial bs2( bname2 );
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EXPECT_STRNE( bs1.m_name.c_str(), bs2.m_name.c_str() );
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EXPECT_TRUE( bs1.m_major != bs2.m_major || bs1.m_minor != bs2.m_minor );
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}
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TEST( BlockSpecialTest, NamedBlockSpecialObjectBySymlinkMatches )
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{
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std::string lname = get_link_name();
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std::string bname = follow_link_name( lname );
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// Test that a symbolic link to a block device and the named block device produce
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// BlockSpecial objects with different names but the same major, minor pair.
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BlockSpecial::clear_cache();
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BlockSpecial lnk( lname );
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BlockSpecial bs( bname );
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EXPECT_STRNE( lnk.m_name.c_str(), bs.m_name.c_str() );
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EXPECT_EQ( lnk.m_major, bs.m_major );
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EXPECT_EQ( lnk.m_minor, bs.m_minor );
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}
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TEST( BlockSpecialTest, PreRegisteredCacheUsedBeforeFileSystem )
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{
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// Test that the cache is used before querying the file system by registering a
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// deliberately wrong major, minor pair for /dev/null and ensuring those are the
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// major, minor numbers reported for the device.
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BlockSpecial::clear_cache();
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BlockSpecial::register_block_special( "/dev/null", 4, 8 );
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BlockSpecial bs( "/dev/null" );
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EXPECT_BSEQTUP( bs, "/dev/null", 4, 8 );
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}
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2017-05-07 07:06:17 -06:00
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TEST( BlockSpecialTest, OperatorEqualsTwoEmptyObjects )
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{
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// Test equality of two empty BlockSpecial objects.
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BlockSpecial::clear_cache();
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BlockSpecial bs1;
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BlockSpecial bs2;
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EXPECT_TRUE( bs1 == bs2 );
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}
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TEST( BlockSpecialTest, OperatorEqualsSamePlainFiles )
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{
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// Test equality of two named plain file or directory BlockSpecial objects;
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BlockSpecial::clear_cache();
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BlockSpecial bs1( "/" );
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BlockSpecial bs2( "/" );
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EXPECT_TRUE( bs1 == bs2 );
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}
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TEST( BlockSpecialTest, OperatorEqualsEmptyObjectAndPlainFile )
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{
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// Test inequality of empty and plain file BlockSpecial objects.
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BlockSpecial::clear_cache();
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BlockSpecial bs1;
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BlockSpecial bs2( "/" );
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EXPECT_FALSE( bs1 == bs2 );
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}
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TEST( BlockSpecialTest, OperatorEqualsDifferentPlainFiles )
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{
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// Test inequality of two different plain file or directory BlockSpecial objects;
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BlockSpecial::clear_cache();
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BlockSpecial bs1( "/" );
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BlockSpecial bs2( "/proc/partitions" );
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EXPECT_FALSE( bs1 == bs2 );
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}
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TEST( BlockSpecialTest, OperatorEqualsSameBlockDevices )
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{
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std::string bname = get_block_name( 0 );
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// Test equality of two BlockSpecial objects using the same named block device.
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BlockSpecial::clear_cache();
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BlockSpecial bs1( bname );
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BlockSpecial bs2( bname );
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EXPECT_TRUE( bs1 == bs2 );
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}
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TEST( BlockSpecialTest, OperatorEqualsEmptyObjectAndBlockDevice )
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{
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std::string bname = get_block_name( 0 );
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// Test inequality of empty and named block device BlockSpecial objects.
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BlockSpecial::clear_cache();
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BlockSpecial bs1;
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BlockSpecial bs2( bname );
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EXPECT_FALSE( bs1 == bs2 );
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}
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TEST( BlockSpecialTest, OperatorEqualsPlainFileAndBlockDevice )
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{
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std::string bname = get_block_name( 0 );
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// Test inequality of plain file and block device BlockSpecial objects.
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BlockSpecial::clear_cache();
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BlockSpecial bs1( "/" );
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BlockSpecial bs2( bname );
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EXPECT_FALSE( bs1 == bs2 );
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}
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TEST( BlockSpecialTest, OperatorEqualsTwoDifferentBlockDevices )
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{
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std::string bname1 = get_block_name( 0 );
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std::string bname2 = get_block_name( 1 );
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// Test inequality of two different named block device BlockSpecial objects.
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BlockSpecial::clear_cache();
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BlockSpecial bs1( bname1 );
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BlockSpecial bs2( bname2 );
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EXPECT_FALSE( bs1 == bs2 );
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}
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2017-05-07 07:18:27 -06:00
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TEST( BlockSpecialTest, OperatorEqualsSameBlockDevicesWithMinorZero )
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{
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// Test for fix in bug #771670. Ensure that block devices with minor number 0 are
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// compared by major, minor pair rather than by name.
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BlockSpecial::clear_cache();
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BlockSpecial::register_block_special( "/dev/mapper/encrypted_swap", 254, 0 );
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BlockSpecial::register_block_special( "/dev/dm-0", 254, 0 );
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BlockSpecial bs1( "/dev/mapper/encrypted_swap" );
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BlockSpecial bs2( "/dev/dm-0" );
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EXPECT_TRUE( bs1 == bs2 );
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}
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2017-05-08 12:19:12 -06:00
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TEST( BlockSpecialTest, OperatorLessThanTwoEmptyObjects )
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{
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// Test one empty BlockSpecial object is not ordered before another empty one.
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BlockSpecial::clear_cache();
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BlockSpecial bs1;
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BlockSpecial bs2;
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EXPECT_FALSE( bs1 < bs2 );
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}
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TEST( BlockSpecialTest, OperatorLessThanSamePlainFiles )
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{
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// Test one plain file BlockSpecial object is not ordered before another of the
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// same name.
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BlockSpecial::clear_cache();
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BlockSpecial bs1( "/" );
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BlockSpecial bs2( "/" );
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EXPECT_FALSE( bs1 < bs2 );
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}
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TEST( BlockSpecialTest, OperatorLessThanDifferentPlainFiles )
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{
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// Test one plain file BlockSpecial object with the lower name is ordered before
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// the other plain file with a higher name.
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BlockSpecial::clear_cache();
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BlockSpecial::register_block_special( "/dummy_file1", 0, 0 );
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BlockSpecial::register_block_special( "/dummy_file2", 0, 0 );
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BlockSpecial bs1( "/dummy_file1" );
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BlockSpecial bs2( "/dummy_file2" );
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EXPECT_TRUE( bs1 < bs2 );
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}
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TEST( BlockSpecialTest, OperatorLessThanEmptyObjectAndPlainFile )
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{
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// Test empty BlockSpecial object with name "" is before a plain file of any name.
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BlockSpecial::clear_cache();
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BlockSpecial bs1;
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BlockSpecial bs2( "/" );
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EXPECT_TRUE( bs1 < bs2 );
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}
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TEST( BlockSpecialTest, OperatorLessThanSameBlockDevices )
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{
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std::string bname = get_block_name( 0 );
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// Test one name block device BlockSpecial object is not ordered before another
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// from the same name.
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BlockSpecial::clear_cache();
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BlockSpecial bs1( bname );
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BlockSpecial bs2( bname );
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EXPECT_FALSE( bs1 < bs2 );
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}
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TEST( BlockSpecialTest, OperatorLessThanEmptyObjectAndBlockDevice )
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{
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std::string bname = get_block_name( 0 );
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// Test empty BlockSpecial object with name "" is before any block device.
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BlockSpecial::clear_cache();
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BlockSpecial bs1;
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BlockSpecial bs2( bname );
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EXPECT_TRUE( bs1 < bs2 );
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}
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TEST( BlockSpecialTest, OperatorLessThanPlainFileAndBlockDevice )
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{
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std::string bname = get_block_name( 0 );
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// Test one plain file BlockSpecial object is ordered before any block device.
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BlockSpecial::clear_cache();
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BlockSpecial bs1( "/" );
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BlockSpecial bs2( bname );
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EXPECT_TRUE( bs1 < bs2 );
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}
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TEST( BlockSpecialTest, OperatorLessThanTwoDifferentBlockDevicesMajorNumbers )
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{
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// Test one block device BlockSpecial object is ordered before another based on
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|
|
// major numbers.
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BlockSpecial::clear_cache();
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BlockSpecial::register_block_special( "/dummy_block2", 1, 1 );
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BlockSpecial::register_block_special( "/dummy_block1", 2, 0 );
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BlockSpecial bs1( "/dummy_block2" );
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BlockSpecial bs2( "/dummy_block1" );
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|
|
EXPECT_TRUE( bs1 < bs2 );
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}
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TEST( BlockSpecialTest, OperatorLessThanTwoDifferentBlockDevicesMinorNumbers )
|
|
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|
{
|
|
|
|
// Test one block device BlockSpecial object is ordered before another based on
|
|
|
|
// minor numbers.
|
|
|
|
BlockSpecial::clear_cache();
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|
BlockSpecial::register_block_special( "/dummy_block2", 2, 0 );
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|
BlockSpecial::register_block_special( "/dummy_block1", 2, 1 );
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|
BlockSpecial bs1( "/dummy_block2" );
|
|
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|
BlockSpecial bs2( "/dummy_block1" );
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|
|
EXPECT_TRUE( bs1 < bs2 );
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}
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2017-05-01 13:37:16 -06:00
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} // namespace GParted
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