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installer/src/installer-lib/test/process_test.cpp

Index: installer/src/installer-lib/test/process_test.cpp
===================================================================
new file mode 100644
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+++ b/installer/src/installer-lib/test/process_test.cpp
@@ -0,0 +1,316 @@
+#include <gtest/gtest.h>
+#include "../process.h"
+#include <functional>
+
+// Turn off warnings for string copies
+#pragma warning( disable : 4996 )
+
+//-------------------------------------------------------
+// Comparison objects
+//-------------------------------------------------------
+
+const wchar_t * multiple_module_names[] = { L"kernel32.dll", L"non-matching-name" } ;
+const wchar_t * non_existent_module_names[] = { L"non-matching-name" } ;
+
+const wchar_t exact_exe_name[] = L"installer-ca-tests.exe" ;
+const std::wstring exact_exe_string( exact_exe_name ) ;
+const wstring_ci exact_exe_string_ci( exact_exe_name ) ;
+
+const wchar_t mixedcase_exe_name[] = L"Installer-CA-Tests.exe" ;
+const wstring_ci mixedcase_exe_string_ci( mixedcase_exe_name ) ;
+
+const wchar_t unknown_name[] = L"non-matching-name" ;
+const wchar_t * multiple_exe_names[] = { mixedcase_exe_name, unknown_name } ;
+
+/**
+ * Compare to our own process name, case-sensitive, no length limit
+ */
+struct our_process_by_name
+  : std::unary_function< PROCESSENTRY32W, bool >
+{
+  bool operator()( const PROCESSENTRY32W & process )
+  {
+    return std::wstring( process.szExeFile ) == exact_exe_string ;
+  } ;
+};
+
+/**
+ * Compare to our own process name, case-insensitive, no length limit
+ */
+struct our_process_by_name_CI
+  : std::unary_function< PROCESSENTRY32W, bool >
+{
+  bool operator()( const PROCESSENTRY32W & process ) 
+  {
+    return wstring_ci( process.szExeFile ) == mixedcase_exe_string_ci ;
+  } ;
+} ;
+
+
+struct our_process_by_name_subclassed
+  : public process_by_any_exe_with_any_module
+{
+  our_process_by_name_subclassed()
+    : process_by_any_exe_with_any_module( file_name_set( multiple_exe_names ), file_name_set() )
+  {}
+} ;
+
+
+//-------------------------------------------------------
+//-------------------------------------------------------
+/**
+ * Filter by process name. Comparison is case-insensitive.
+ */
+class process_by_any_file_name_CI
+  : public std::unary_function< PROCESSENTRY32W, bool >
+{
+  const file_name_set & names ;
+public:
+  bool operator()( const PROCESSENTRY32W & process)
+  {
+    return names.find( process.szExeFile ) != names.end() ;
+  }
+  process_by_any_file_name_CI( const file_name_set & names )
+    : names( names )
+  {}
+} ;
+
+/**
+ * Filter by process name. Comparison is case-insensitive.
+ */
+class process_by_name_CI
+  : public std::unary_function< PROCESSENTRY32W, bool >
+{
+  const wstring_ci _name ;
+public:
+  bool operator()( const PROCESSENTRY32W & process )
+  {
+    return _name == wstring_ci( process.szExeFile ) ;
+  }
+
+  process_by_name_CI( const wchar_t * name )
+    : _name( name )
+  {}
+} ;
+
+//-------------------------------------------------------
+// TESTS, no snapshots
+//-------------------------------------------------------
+PROCESSENTRY32 process_with_name( const wchar_t * s )
+{
+  PROCESSENTRY32W p ;
+  wcsncpy( p.szExeFile, s, MAX_PATH ) ;
+  return p ;
+}
+
+PROCESSENTRY32 process_empty = process_with_name( L"" ) ;
+PROCESSENTRY32 process_exact = process_with_name( exact_exe_name ) ;
+PROCESSENTRY32 process_mixedcase = process_with_name( mixedcase_exe_name ) ;
+PROCESSENTRY32 process_explorer = process_with_name( L"explorer.exe" ) ;
+PROCESSENTRY32 process_absent = process_with_name( L"no_such_name" ) ;
+
+file_name_set multiple_name_set( multiple_exe_names ) ;
+file_name_set multiple_name_set_modules( multiple_module_names ) ;
+file_name_set non_existent_name_set_modules( non_existent_module_names ) ;
+process_by_any_file_name_CI find_in_set( multiple_name_set ) ;
+process_by_any_exe_with_any_module find_in_set_w_kernel32( multiple_name_set, multiple_name_set_modules ) ;
+process_by_any_exe_with_any_module find_in_set_w_non_existent( multiple_name_set, non_existent_name_set_modules ) ;
+
+TEST( file_name_set, validate_setup )
+{
+  ASSERT_EQ( 2u, multiple_name_set.size() ) ;
+  ASSERT_TRUE( multiple_name_set.find( exact_exe_string_ci ) != multiple_name_set.end() ) ;
+  ASSERT_TRUE( multiple_name_set.find( mixedcase_exe_string_ci ) != multiple_name_set.end() ) ;
+  ASSERT_TRUE( multiple_name_set.find( L"" ) == multiple_name_set.end() ) ;
+  ASSERT_TRUE( multiple_name_set.find( L"not-in-list" ) == multiple_name_set.end() ) ;
+}
+
+TEST( process_by_any_file_name_CI, empty )
+{
+  file_name_set s ;
+  process_by_any_file_name_CI x( s ) ;
+
+  ASSERT_FALSE( x( process_empty ) ) ;
+  ASSERT_FALSE( x( process_exact ) ) ;
+  ASSERT_FALSE( x( process_mixedcase ) ) ;
+  ASSERT_FALSE( x( process_explorer ) ) ;
+  ASSERT_FALSE( x( process_absent ) ) ;
+}
+
+TEST( process_by_any_file_name_CI, single_element_known )
+{
+  const wchar_t * elements[ 1 ] = { exact_exe_name } ;
+  file_name_set s( elements ) ;
+  process_by_any_file_name_CI x( s ) ;
+
+  ASSERT_FALSE( x( process_empty ) ) ;
+  ASSERT_TRUE( x( process_exact ) ) ;
+  ASSERT_TRUE( x( process_mixedcase ) ) ;
+  ASSERT_FALSE( x( process_explorer ) ) ;
+  ASSERT_FALSE( x( process_absent ) ) ;
+}
+
+TEST( process_by_any_file_name_CI, single_element_unknown )
+{
+  const wchar_t * elements[ 1 ] = { unknown_name } ;
+  file_name_set s( elements ) ;
+  process_by_any_file_name_CI x( s ) ;
+
+  ASSERT_FALSE( x( process_empty ) ) ;
+  ASSERT_FALSE( x( process_exact ) ) ;
+  ASSERT_FALSE( x( process_mixedcase ) ) ;
+  ASSERT_FALSE( x( process_explorer ) ) ;
+  ASSERT_FALSE( x( process_absent ) ) ;
+}
+
+TEST( process_by_any_file_name_CI, two_elements )
+{
+  file_name_set s( multiple_exe_names ) ;
+  process_by_any_file_name_CI x( s ) ;
+
+  ASSERT_FALSE( find_in_set( process_empty ) ) ;
+  ASSERT_TRUE( find_in_set( process_exact ) ) ;
+  ASSERT_TRUE( find_in_set( process_mixedcase ) ) ;
+  ASSERT_FALSE( find_in_set( process_explorer ) ) ;
+  ASSERT_FALSE( find_in_set( process_absent ) ) ;
+}
+
+//-------------------------------------------------------
+// Single-snapshot version of initializers
+//-------------------------------------------------------
+/**
+ * Single-snapshot version of initialize_process_list, for testing.
+ */
+template< class T, class Admittance, class Extractor >
+void initialize_process_list( std::vector< T > & v, Admittance admit = Admittance(), Extractor extract = Extractor() )
+{
+  initialize_process_list( v, Process_Snapshot(), admit, extract ) ;
+}
+
+/**
+ * Single-snapshot version of initialize_process_set, for testing.
+ */
+template< class T, class Admittance, class Extractor >
+void initialize_process_set( std::set< T > & s, Admittance admit = Admittance(), Extractor extract = Extractor() )
+{
+  initialize_process_set( s, Process_Snapshot(), admit, extract ) ;
+}
+
+//-------------------------------------------------------
+// TESTS with snapshots
+//-------------------------------------------------------
+/**
+ * Construction test ensures that we don't throw and that at least one process shows up.
+ */
+TEST( Process_List_Test, construct_vector )
+{
+  std::vector< PROCESSENTRY32W > v ;
+  initialize_process_list( v, every_process(), copy_all() ) ;
+  ASSERT_GE( v.size(), 1u );
+}
+
+/**
+ * The only process we are really guaranteed to have is this test process itself.
+ */
+TEST( Process_List_Test, find_our_process )
+{
+  std::vector< PROCESSENTRY32W > v ;
+  initialize_process_list( v, our_process_by_name(), copy_all() ) ;
+  size_t size( v.size() );
+  EXPECT_EQ( 1u, size );    // Please, don't run multiple test executables simultaneously
+  ASSERT_GE( 1u, size );
+}
+
+/**
+ * The only process we are really guaranteed to have is this test process itself.
+ * This test uses same one used in Process_Closer
+ */
+TEST( Process_List_Test, find_our_process_CI_generic )
+{
+  std::vector< PROCESSENTRY32W > v ;
+  initialize_process_list( v, process_by_name_CI( mixedcase_exe_name ), copy_all() ) ;
+  size_t size( v.size() );
+  EXPECT_EQ( 1u, size );    // Please, don't run multiple test executables simultaneously
+  ASSERT_GE( 1u, size );
+}
+
+/**
+ * The only process we are really guaranteed to have is this test process itself.
+ * This test uses the generic filter function.
+ */
+TEST( Process_List_Test, find_our_process_CI_as_used )
+{
+  std::vector< PROCESSENTRY32W > v ;
+  initialize_process_list( v, process_by_any_file_name_CI( file_name_set( multiple_exe_names ) ), copy_all() ) ;
+  size_t size( v.size() );
+  EXPECT_EQ( 1u, size );    // Please, don't run multiple test executables simultaneously
+  ASSERT_GE( 1u, size );
+}
+
+/**
+ * Locate the PID of our process.
+ */
+TEST( Process_List_Test, find_our_PID )
+{
+  std::vector< DWORD > v ;
+  initialize_process_list( v, our_process_by_name(), copy_PID() ) ;
+  size_t size( v.size() );
+  EXPECT_EQ( size, 1u );    // Please, don't run multiple test executables simultaneously
+  ASSERT_GE( size, 1u );
+}
+
+/**
+ * Locate the PID of our process using the
+ */
+TEST( Process_List_Test, find_our_process_in_set )
+{
+  std::vector< DWORD > v ;
+  initialize_process_list( v, find_in_set, copy_PID() ) ;
+  size_t size( v.size() );
+  EXPECT_EQ( size, 1u );    // Please, don't run multiple test executables simultaneously
+  ASSERT_GE( size, 1u );
+}
+
+//-------------------------------------------------------
+// TESTS for process ID sets
+//-------------------------------------------------------
+/*
+ * Can't use copy_all without a definition for "less< PROCESSENTRY32W >".
+ * Thus all tests only use copy_PID
+ */
+
+/**
+ * Construction test ensures that we don't throw and that at least one process shows up.
+ */
+TEST( pid_set, construct_set )
+{
+  std::set< DWORD > s ;
+  initialize_process_set( s, every_process(), copy_PID() ) ;
+  ASSERT_GE( s.size(), 1u );
+}
+
+TEST( pid_set, find_our_process_in_set )
+{
+  std::set< DWORD > s ;
+  initialize_process_set( s, find_in_set, copy_PID() ) ;
+  size_t size( s.size() ) ;
+  EXPECT_EQ( size, 1u );
+  ASSERT_GE( size, 1u );
+}
+
+TEST( pid_set, find_our_process_in_set_w_kernel32 )
+{
+  std::set< DWORD > s ;
+  initialize_process_set( s, find_in_set_w_kernel32, copy_PID() ) ;
+  size_t size( s.size() ) ;
+  EXPECT_EQ( size, 1u );
+  ASSERT_GE( size, 1u );
+}
+TEST( pid_set, find_our_process_in_set_w_non_existant )
+{
+  std::set< DWORD > s ;
+  initialize_process_set( s, find_in_set_w_non_existent, copy_PID() ) ;
+  size_t size( s.size() ) ;
+  EXPECT_EQ( size, 0u );
+  ASSERT_GE( size, 0u );
+}