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VarPythTest.pas
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(**************************************************************************)
(* *)
(* Module: Unit 'VarPythTest' Copyright (c) 2021 *)
(* *)
(* Lucas Moura Belo - lmbelo *)
(* lucas.belo@live.com *)
(* BH, Brazil *)
(* *)
(* PyScripter *)
(* e-mail: pyscripter@gmail.com *)
(* *)
(* Project pages: https://github.com/Embarcadero/python4delphi *)
(* https://github.com/pyscripter/python4delphi *)
(**************************************************************************)
(* Functionality: Test unit for variants *)
(* *)
(* *)
(**************************************************************************)
(* This source code is distributed with no WARRANTY, for no reason or use.*)
(* Everyone is allowed to use and change this code free for his own tasks *)
(* and projects, as long as this header and its copyright text is intact. *)
(* For changed versions of this code, which are public distributed the *)
(* following additional conditions have to be fullfilled: *)
(* 1) The header has to contain a comment on the change and the author of *)
(* it. *)
(* 2) A copy of the changed source has to be sent to the above E-Mail *)
(* address or my then valid address, if this is possible to the *)
(* author. *)
(* The second condition has the target to maintain an up to date central *)
(* version of the component. If this condition is not acceptable for *)
(* confidential or legal reasons, everyone is free to derive a component *)
(* or to generate a diff file to my or other original sources. *)
(**************************************************************************)
unit VarPythTest;
interface
uses
DUnitX.TestFramework,
PythonEngine,
PythonLoad;
type
{$M+}
[TestFixture]
TVarPythTest = class
private
FPythonEngine: TPythonEngine;
public
[SetupFixture]
procedure SetupFixture;
[TearDownFixture]
procedure TearDownFixture;
[Test]
procedure TestIterator;
[Test]
procedure TestIntegers;
[Test]
procedure TestFloats;
[Test]
procedure TestStrings;
[Test]
procedure TestSequences;
[Test]
procedure TestMappings;
[Test]
procedure TestDates;
[Test]
procedure TestObjects;
end;
implementation
uses
SysUtils, StrUtils,
Variants,
VarPyth;
{ TVarPythTest }
procedure TVarPythTest.SetupFixture;
begin
FPythonEngine := TPythonEngine.Create(nil);
FPythonEngine.Name := 'PythonEngine';
TPythonLoad.Configure(FPythonEngine);
FPythonEngine.LoadDll;
end;
procedure TVarPythTest.TearDownFixture;
begin
FPythonEngine.Free();
end;
procedure TVarPythTest.TestDates;
var
a, b, _timeMod : Variant;
c : Variant;
_date, _date2 : TDateTime;
_year, _month, _day : Word;
_year2, _month2, _day2 : Word;
_hour, _min, _sec, _msec : Word;
_hour2, _min2, _sec2, _msec2 : Word;
begin
_timeMod := Import('time'); // get the time module of Python
_date := Now;
DecodeDate( _date, _year, _month, _day );
DecodeTime( _date, _hour, _min, _sec, _msec );
b := _timeMod.localtime(_timeMod.time()); // same as Now in Delphi
a := VarPythonCreate(_date);
Assert.IsTrue( a.Length = 9 );
Assert.IsTrue( a.GetItem(0) = _year );
Assert.IsTrue( a.GetItem(1) = _month );
Assert.IsTrue( a.GetItem(2) = _day );
Assert.IsTrue( a.GetItem(3) = _hour );
Assert.IsTrue( a.GetItem(4) = _min );
Assert.IsTrue( a.GetItem(5) = _sec );
Assert.IsTrue( b.Length = 9 );
Assert.IsTrue( b.GetItem(0) = a.GetItem(0) );
Assert.IsTrue( b.GetItem(1) = a.GetItem(1) );
Assert.IsTrue( b.GetItem(2) = a.GetItem(2) );
Assert.IsTrue( b.GetItem(3) = a.GetItem(3) );
Assert.IsTrue( b.GetItem(4) = a.GetItem(4) );
Assert.IsTrue( b.GetItem(5) = a.GetItem(5) );
Assert.IsTrue( b.GetItem(6) = a.GetItem(6) );
Assert.IsTrue( b.GetItem(7) = a.GetItem(7) );
// don't test the 9th item of the tuple, because it's the daylight saving,
// and it's not computed by the Python for Delphi.
//Assert.IsTrue( b.GetItem(8) = a.GetItem(8) );
_date2 := b;
DecodeDate( _date2, _year2, _month2, _day2 );
DecodeTime( _date2, _hour2, _min2, _sec2, _msec2 );
Assert.IsTrue( _year2 = _year );
Assert.IsTrue( _month2 = _month );
Assert.IsTrue( _day2 = _day );
Assert.IsTrue( _hour2 = _hour );
Assert.IsTrue( _min2 = _min );
Assert.IsTrue( _sec2 = _sec );
// test new datetime module
_timeMod := Import('datetime'); // get the datetime module of Python
//or _timeMod := DatetimeModule; // get the datetime module of Python
a := _timeMod.datetime(2002, 12, 30, 22, 15, 38, 827738);
Assert.IsTrue(VarIsPythonDateTime(a));
Assert.IsTrue(VarIsPythonDate(a));
Assert.IsTrue(not VarIsPythonTime(a));
Assert.IsTrue(not VarIsPythonDateTimeDelta(a));
Assert.IsTrue(a.year = 2002);
Assert.IsTrue(a.month = 12);
Assert.IsTrue(a.day = 30);
Assert.IsTrue(a.hour = 22);
Assert.IsTrue(a.minute = 15);
Assert.IsTrue(a.second = 38);
Assert.IsTrue(a.microsecond = 827738);
_date := a;
DecodeDate( _date, _year, _month, _day );
DecodeTime( _date, _hour, _min, _sec, _msec );
Assert.IsTrue(_year = 2002);
Assert.IsTrue(_month = 12);
Assert.IsTrue(_day = 30);
Assert.IsTrue(_hour = 22);
Assert.IsTrue(_min = 15);
Assert.IsTrue(_sec = 38);
Assert.IsTrue(_msec = 827738 div 1000);
a := _timeMod.date(2002, 12, 30);
Assert.IsTrue(not VarIsPythonDateTime(a));
Assert.IsTrue(VarIsPythonDate(a));
Assert.IsTrue(not VarIsPythonTime(a));
Assert.IsTrue(not VarIsPythonDateTimeDelta(a));
_date := a;
DecodeDate( _date, _year, _month, _day );
DecodeTime( _date, _hour, _min, _sec, _msec );
Assert.IsTrue(_year = 2002);
Assert.IsTrue(_month = 12);
Assert.IsTrue(_day = 30);
Assert.IsTrue(_hour = 0);
Assert.IsTrue(_min = 0);
Assert.IsTrue(_sec = 0);
Assert.IsTrue(_msec = 0);
Assert.IsTrue(a.year = 2002);
Assert.IsTrue(a.month = 12);
Assert.IsTrue(a.day = 30);
a := _timeMod.time(22, 15, 38, 827738);
Assert.IsTrue(not VarIsPythonDateTime(a));
Assert.IsTrue(not VarIsPythonDate(a));
Assert.IsTrue(VarIsPythonTime(a));
Assert.IsTrue(not VarIsPythonDateTimeDelta(a));
Assert.IsTrue(a.hour = 22);
Assert.IsTrue(a.minute = 15);
Assert.IsTrue(a.second = 38);
Assert.IsTrue(a.microsecond = 827738);
_date := a;
DecodeTime( _date, _hour, _min, _sec, _msec );
Assert.IsTrue(_hour = 22);
Assert.IsTrue(_min = 15);
Assert.IsTrue(_sec = 38);
Assert.IsTrue(_msec = 827738 div 1000);
a := DatetimeModule.datetime(2002, 12, 30, 22, 15, 38, 827738);
b := _timeMod.datetime(2002, 12, 30, 22, 16, 38, 827738);
c := b - a;
Assert.IsTrue(VarIsPythonDateTimeDelta(c));
Assert.IsTrue(c.days = 0);
Assert.IsTrue(c.seconds = 60);
Assert.IsTrue(c.microseconds = 0);
_date := c;
Assert.IsTrue(Trunc(_date)=0);
DecodeTime( _date, _hour, _min, _sec, _msec );
Assert.IsTrue(_hour = 0);
Assert.IsTrue(_min = 1);
Assert.IsTrue(_sec = 0);
Assert.IsTrue(_msec = 0);
c := a - b;
Assert.IsTrue(VarIsPythonDateTimeDelta(c));
Assert.IsTrue(c.days = -1);
Assert.IsTrue(c.seconds = 86340);
Assert.IsTrue(c.microseconds = 0);
_date := c;
Assert.IsTrue(Trunc(_date)=0);
Assert.IsTrue(_date<0);
DecodeTime( _date, _hour, _min, _sec, _msec );
Assert.IsTrue(_hour = 0);
Assert.IsTrue(_min = 1);
Assert.IsTrue(_sec = 0);
Assert.IsTrue(_msec = 0);
c := a + (b-a);
Assert.IsTrue(VarIsPythonDateTime(c));
Assert.IsTrue(c = b);
Assert.IsTrue(c <> a);
Assert.IsTrue(a < b);
Assert.IsTrue(b > a);
GetPythonEngine.DatetimeConversionMode := dcmToDatetime;
try
_date := EncodeDate(2003, 01, 28) + EncodeTime(12, 22, 33, 450);
a := VarPythonCreate(_date);
Assert.IsTrue(VarIsPythonDateTime(c));
_date2 := a;
DecodeDate( _date, _year, _month, _day );
DecodeTime( _date, _hour, _min, _sec, _msec );
DecodeDate( _date2, _year2, _month2, _day2 );
DecodeTime( _date2, _hour2, _min2, _sec2, _msec2 );
Assert.IsTrue( _year2 = _year );
Assert.IsTrue( _month2 = _month );
Assert.IsTrue( _day2 = _day );
Assert.IsTrue( _hour2 = _hour );
Assert.IsTrue( _min2 = _min );
Assert.IsTrue( _sec2 = _sec );
Assert.IsTrue( _msec2 = _msec );
Assert.IsTrue(a.year = 2003);
Assert.IsTrue(a.month = 01);
Assert.IsTrue(a.day = 28);
Assert.IsTrue(a.hour = 12);
Assert.IsTrue(a.minute = 22);
Assert.IsTrue(a.second = 33);
Assert.IsTrue(a.microsecond = 450000);
finally
GetPythonEngine.DatetimeConversionMode := dcmToTuple;
end;
end;
procedure TVarPythTest.TestFloats;
var
a, b, c : Variant;
dbl_a, dbl_b, dbl_c : Double;
int : Integer;
begin
// initialize the operands
dbl_a := 2.5;
a := VarPythonCreate(dbl_a);
Assert.IsTrue(VarIsPython(a));
Assert.IsTrue(VarIsPythonNumber(a));
Assert.IsTrue(VarIsPythonFloat(a));
Assert.IsTrue(Double(a) = 2.5);
dbl_b := 3.2;
b := VarPythonCreate(dbl_b);
Assert.IsTrue(VarIsPython(b));
Assert.IsTrue(VarIsPythonNumber(b));
Assert.IsTrue(VarIsPythonFloat(b));
Assert.IsTrue(Double(b) = dbl_b); // note that Assert.IsTrue(Double(b) = 3.2) fails.
// arithmetic operations
//----------------------
// addition
c := a + b;
// check result of operation
Assert.IsTrue( Double(c) = (dbl_a + dbl_b) );
// check that operation did not change the content of operands.
Assert.IsTrue(Double(a) = dbl_a);
Assert.IsTrue(Double(b) = dbl_b);
// now with a litteral
c := a + b + 1;
Assert.IsTrue( Double(c) = (dbl_a+dbl_b+1) );
c := a + 1 + b;
Assert.IsTrue( Double(c) = (dbl_a+1+dbl_b) );
c := 1 + a + b;
Assert.IsTrue( Double(c) = (1+dbl_a+dbl_b) );
// substraction
c := b - a;
Assert.IsTrue( Double(c) = (dbl_b - dbl_a) );
// now with a litteral
c := b - a - 1;
Assert.IsTrue( Double(c) = (dbl_b-dbl_a-1) );
c := b - 1 - a;
Assert.IsTrue( Double(c) = (dbl_b-1-dbl_a) );
c := 1 - b - a;
Assert.IsTrue( Double(c) = (1-dbl_b-dbl_a) );
// multiplication
c := a * b;
dbl_c := dbl_a * dbl_b;
Assert.IsTrue( Double(c) = dbl_c );
// now with a litteral
c := a * b * 2;
dbl_c := dbl_a * dbl_b * 2;
Assert.IsTrue( Double(c) = dbl_c );
c := a * 2 * b;
dbl_c := dbl_a * 2 * dbl_b;
Assert.IsTrue( Double(c) = dbl_c );
c := 2 * a * b;
dbl_c := 2 * dbl_a * dbl_b;
Assert.IsTrue( Double(c) = dbl_c );
// division: in Python a division between 2 integers is the same as the integer division
c := b / a;
dbl_c := dbl_b / dbl_a;
Assert.IsTrue( Double(c) = dbl_c );
// negation
c := -a;
Assert.IsTrue( Double(c) = -dbl_a );
// comparisons
//------------
// equal
c := a = b;
Assert.IsTrue(c = False);
c := a = a;
Assert.IsTrue(c = True);
Assert.IsTrue( a = dbl_a);
// not equal
c := a <> b;
Assert.IsTrue(c = True);
Assert.IsTrue( not (c = b) );
c := a <> a;
Assert.IsTrue(c = False);
Assert.IsTrue( a = dbl_a);
// greater than
c := a > b; Assert.IsTrue(c = False);
c := b > a; Assert.IsTrue(c = True);
Assert.IsTrue( a > (dbl_a-1));
// greater or equal than
c := a >= b; Assert.IsTrue(c = False);
c := b >= a; Assert.IsTrue(c = True);
c := a >= a; Assert.IsTrue(c = True);
Assert.IsTrue( a >= dbl_a );
// less than
c := a < b; Assert.IsTrue(c = True);
c := b < a; Assert.IsTrue(c = False);
Assert.IsTrue( a < dbl_b);
// less or equal than
c := a <= b; Assert.IsTrue(c = True);
c := b <= a; Assert.IsTrue(c = False);
c := a <= a; Assert.IsTrue(c = True);
Assert.IsTrue( a <= dbl_a);
// parenthesis
c := a * ((a * b) / b);
dbl_c := dbl_a * ((dbl_a * dbl_b) / dbl_b);
Assert.IsTrue( c = dbl_c );
// copy
c := a;
Assert.IsTrue( c = a);
Assert.IsTrue( VarIsSame(c, a) ); // checks if 2 variants share the same Python object.
// casts
int := a;
Assert.IsTrue(int = 2);
end;
procedure TVarPythTest.TestIntegers;
var
a, b, c : Variant;
big : Int64;
begin
// initialize the operands
a := VarPythonCreate(2);
Assert.IsTrue(VarIsPython(a));
Assert.IsTrue(VarIsPythonNumber(a));
Assert.IsTrue(VarIsPythonInteger(a));
Assert.IsTrue(Integer(a) = 2);
b := VarPythonCreate(3);
Assert.IsTrue(VarIsPython(b));
Assert.IsTrue(VarIsPythonNumber(b));
Assert.IsTrue(VarIsPythonInteger(b));
Assert.IsTrue(Integer(b) = 3);
// arithmetic operations
//----------------------
// addition
c := a + b;
// check result of operation
Assert.IsTrue( Integer(c) = 5 );
// check that operation did not change the content of operands.
Assert.IsTrue(Integer(a) = 2);
Assert.IsTrue(Integer(b) = 3);
// now with a litteral
c := a + b + 1;
Assert.IsTrue( Integer(c) = 6 );
c := a + 1 + b;
Assert.IsTrue( Integer(c) = 6 );
c := 1 + a + b;
Assert.IsTrue( Integer(c) = 6 );
// substraction
c := b - a;
Assert.IsTrue( Integer(c) = 1 );
// now with a litteral
c := b - a - 1;
Assert.IsTrue( Integer(c) = 0 );
c := b - 1 - a;
Assert.IsTrue( Integer(c) = 0 );
c := 1 - b - a;
Assert.IsTrue( Integer(c) = -4 );
// multiplication
c := a * b;
Assert.IsTrue( Integer(c) = 6 );
// now with a litteral
c := a * b * 2;
Assert.IsTrue( Integer(c) = 12 );
c := a * 2 * b;
Assert.IsTrue( Integer(c) = 12 );
c := 2 * a * b;
Assert.IsTrue( Integer(c) = 12 );
// integer division
c := b div a;
Assert.IsTrue( Integer(c) = 1 );
// division: in Python a division between 2 integers is the same as the integer division
c := b / a;
Assert.IsTrue( c = 1.5 );
Assert.IsTrue( Integer(c) = 2 );
// modulus
c := b mod a;
Assert.IsTrue( Integer(c) = 1 );
c := BuiltinModule.divmod(b, a); // this returns a tuple whose first item is the result of the division,
// and second item the modulo.
if VarIsPythonSequence(c) and (c.Length = 2) then
begin
Assert.IsTrue(Integer(c.GetItem(0)) = 1); // division
Assert.IsTrue(Integer(c.GetItem(1)) = 1); // modulo
end;
// power
c := BuiltinModule.pow(a, b);
Assert.IsTrue(c = 8);
// negation
c := -a;
Assert.IsTrue( Integer(c) = -2 );
// logical operations
//------------------
// inverse
c := not a; // in python it would be: c = ~2
Assert.IsTrue( Integer(c) = -3 );
// shift left (<<)
c := a shl b;
Assert.IsTrue( Integer(c) = 16 );
c := a shl 1;
Assert.IsTrue( Integer(c) = 4 );
// shift right (>>)
c := a shl b;
c := c shr b;
Assert.IsTrue( Integer(c) = Integer(a) );
c := b shr 1;
Assert.IsTrue( Integer(c) = 1 );
// and
c := a and (a*5);
Assert.IsTrue( Integer(c) = Integer(a) );
c := a and 6;
Assert.IsTrue( Integer(c) = Integer(a) );
// or
c := a or b;
Assert.IsTrue( Integer(c) = 3 );
c := a or 3;
Assert.IsTrue( Integer(c) = 3 );
// xor
c := a xor b;
Assert.IsTrue( Integer(c) = 1 );
c := a xor 3;
Assert.IsTrue( Integer(c) = 1 );
// comparisons
//------------
// equal
c := a = b;
Assert.IsTrue(c = False);
c := a = a;
Assert.IsTrue(c = True);
Assert.IsTrue( a = 2);
// not equal
c := a <> b;
Assert.IsTrue(c = True);
Assert.IsTrue( not (c = b) );
c := a <> a;
Assert.IsTrue(c = False);
Assert.IsTrue( a = 2);
// greater than
c := a > b; Assert.IsTrue(c = False);
c := b > a; Assert.IsTrue(c = True);
Assert.IsTrue( a > 1);
// greater or equal than
c := a >= b; Assert.IsTrue(c = False);
c := b >= a; Assert.IsTrue(c = True);
c := a >= a; Assert.IsTrue(c = True);
Assert.IsTrue( a >= 2 );
// less than
c := a < b; Assert.IsTrue(c = True);
c := b < a; Assert.IsTrue(c = False);
Assert.IsTrue( a < 6);
// less or equal than
c := a <= b; Assert.IsTrue(c = True);
c := b <= a; Assert.IsTrue(c = False);
c := a <= a; Assert.IsTrue(c = True);
Assert.IsTrue( a <= 2);
// parenthesis
c := a * ((a * b) div b);
Assert.IsTrue( c = a*2 );
// copy
c := a;
Assert.IsTrue( c = a);
Assert.IsTrue( VarIsSame(c, a) ); // checks if 2 variants share the same Python object.
// test long long (Int64)
big := Int64(MaxInt)*4;
b := VarPythonCreate(big);
Assert.IsTrue( b = big );
Assert.IsTrue( b <> big+1 );
Assert.IsTrue( b > MaxInt );
Assert.IsTrue( MaxInt < b );
Assert.IsTrue( b+1 = big+1 );
Assert.IsTrue( b*2 = big*2 );
Assert.IsTrue( b div 2 = big div 2 );
c := VarPythonCreate(True);
Assert.IsTrue(VarIsBool(c));
Assert.IsTrue(VarIsTrue(c));
c := VarPythonCreate(False);
Assert.IsTrue(VarIsBool(c));
Assert.IsTrue(not VarIsTrue(c));
end;
procedure TVarPythTest.TestIterator;
var
Module: Variant;
Count: integer;
begin
Count := 0;
for Module in VarPyIterate(SysModule.modules) do begin
Count := Count + 1;
Log(Module);
end;
Assert.IsTrue(Count = len(SysModule.modules));
end;
procedure TVarPythTest.TestMappings;
var
a, b, c, keys, values : Variant;
begin
// initialize the operands
a := NewPythonDict;
Assert.IsTrue(VarIsPython(a));
Assert.IsTrue(VarIsPythonMapping(a));
Assert.IsTrue(VarIsPythonDict(a));
// There is a bug in D2010 in which Char('a') gets translated to integer parameter
a.SetItem( string('a'), 1 );
a.SetItem( string('b'), 2 );
a.SetItem( string('c'), 3 );
Assert.IsTrue(a.Length = 3); // this is a special property that does the same as: len(a) in Python
Assert.IsTrue(a.Length() = 3); // this is a special method that does the same as the special property
Assert.IsTrue(len(a) = 3);
Assert.IsTrue(a.GetItem(string('a')) = 1); // this is a special method that lets you do the same as: a[0] in Python
Assert.IsTrue(a.GetItem(string('b')) = 2);
Assert.IsTrue(a.GetItem(string('c')) = 3);
b := NewPythonDict;
Assert.IsTrue(VarIsPython(b));
Assert.IsTrue(VarIsPythonMapping(b));
Assert.IsTrue(VarIsPythonDict(b));
b.SetItem( string('d'), 4 );
b.SetItem( string('e'), 5 );
b.SetItem( string('f'), 6 );
Assert.IsTrue(b.Length = 3);
Assert.IsTrue(b.Length() = 3);
Assert.IsTrue(len(b) = 3);
Assert.IsTrue(b.GetItem(string('d')) = 4);
Assert.IsTrue(b.GetItem(string('e')) = 5);
Assert.IsTrue(b.GetItem(string('f')) = 6);
// copy
c := a;
Assert.IsTrue( c = a);
Assert.IsTrue( VarIsSame(c, a) ); // checks if 2 variants share the same Python object.
// dict methods
Assert.IsTrue( Boolean(a.__contains__(string('a'))) );
Assert.IsTrue( not Boolean(a.__contains__('abc')) );
keys := BuiltinModule.list(a.keys());
keys.sort();
Assert.IsTrue( keys = VarPythonCreate(VarArrayOf(['a', 'b', 'c'])));
values := BuiltinModule.list(a.values());
values.sort();
Assert.IsTrue( values = VarPythonCreate(VarArrayOf([1, 2, 3])));
c := a;
c.DeleteItem(string('a'));
Assert.IsTrue( not Boolean(c.__contains__(string('a'))) );
// test string values
a := NewPythonDict;
a.SetItem( string('a'), 'Hello');
a.SetItem( string('b'), 'World!');
a.SetItem( string('c'), '');
Assert.IsTrue(a.GetItem(string('a')) = 'Hello');
Assert.IsTrue(a.GetItem(string('b')) = 'World!');
Assert.IsTrue(a.GetItem(string('c')) = '');
end;
procedure TVarPythTest.TestObjects;
var
_main, f, a, b, c : Variant;
val : Integer;
_str : String;
const
Script =
'class XYZ(object):' + sLineBreak +
' pass' + sLineBreak +
'' + sLineBreak +
'class Foo:' + sLineBreak +
' def __init__(Self, Value=0):' + sLineBreak +
' Self.Value = Value' + sLineBreak +
' def __del__(Self):' + sLineBreak +
' print("delete", Self)' + sLineBreak +
' def __add__(self, other):' + sLineBreak +
' return Foo(self.Value + other.Value)' + sLineBreak +
' def Inc(Self, AValue = 1):' + sLineBreak +
' Self.Value = Self.Value + AValue' + sLineBreak +
' def GetSelf(Self):' + sLineBreak +
' return Self' + sLineBreak +
' def GetValue(Self):' + sLineBreak +
' return Self.Value' + sLineBreak +
' def SetABC(Self, A, B, C):' + sLineBreak +
' Self.A = A' + sLineBreak +
' Self.B = B' + sLineBreak +
' Self.C = C' + sLineBreak +
' def Add(Self, AFooInst):' + sLineBreak +
' Self.Value = Self.Value + AFooInst.Value' + sLineBreak +
'class Bar(Foo):' + sLineBreak +
' def Inc(Self, AValue = 1):' + sLineBreak +
' Self.Value = Self.Value - AValue' + sLineBreak +
'def Add(a, b):' + sLineBreak +
' return a + b' + sLineBreak +
'def MakeList(a, b, c, d):' + sLineBreak +
' return [a, b, c, d]' + sLineBreak +
'' + sLineBreak +
'f = Foo()' + sLineBreak +
'print("Created", f)' + sLineBreak +
'f.Inc()' + sLineBreak +
'f.Inc(2)' + sLineBreak +
'b = Bar()' + sLineBreak +
'b.Inc()' + sLineBreak +
'b.Inc(2)';
begin
FPythonEngine.ExecString(Script);
_main := MainModule;
Assert.IsTrue( VarIsPythonModule(_main) );
Assert.IsTrue( VarIsPythonModule(SysModule) );
Assert.IsTrue( Import('sys').version = SysModule.version );
Log(SysModule.version);
Assert.IsTrue( Boolean(SysModule.modules.Contains(GetPythonEngine.ExecModule)) ); // if __main__ in sys.modules
Assert.IsTrue( VarIsSameType(_main, SysModule) );
Assert.IsTrue( _type(_main).__name__ = 'module');
Assert.IsTrue( BuiltinModule.type(_main).__name__ = 'module');
Assert.IsTrue( VarIsPythonClass(_main.Foo) );
Assert.IsTrue( VarIsPythonClass(_main.Bar) );
Assert.IsTrue( VarIsPythonClass(_main.XYZ) );
Assert.IsTrue( not VarIsPythonClass(_main.Foo.__add__) );
Assert.IsTrue( not VarIsPythonClass(_main.f) );
Assert.IsTrue( VarIsPythonCallable(_main.Foo) );
Assert.IsTrue( VarIsPythonCallable(_main.Foo) );
Assert.IsTrue( VarIsTrue(BuiltinModule.callable(_main.Foo)) );
Assert.IsTrue( VarIsSame(_main.f.__class__, _main.Foo) );
Assert.IsTrue( VarIsPythonMethod(_main.f.Inc) );
Assert.IsTrue( VarIsPythonCallable(_main.f.Inc) );
Assert.IsTrue( VarIsTrue(BuiltinModule.callable(_main.f.Inc)) );
Assert.IsTrue( VarIsPythonFunction(_main.Add) );
Assert.IsTrue( VarIsPythonCallable(_main.Add) );
Assert.IsTrue( VarIsInstanceOf(_main.f, _main.Foo) );
Assert.IsTrue( VarIsTrue(BuiltinModule.isinstance(_main.f, _main.Foo)) );
Assert.IsTrue( VarIsSubclassOf(_main.Bar, _main.Foo) );
Assert.IsTrue( VarIsTrue(BuiltinModule.issubclass(_main.Bar, _main.Foo)) );
Assert.IsTrue( not VarIsSubclassOf(_main.Foo, _main.Bar) );
Assert.IsTrue( VarIsInstanceOf(_main.b, _main.Foo) );
Assert.IsTrue( not VarIsInstanceOf(_main.f, _main.Bar) );
Assert.IsTrue( VarIsTrue( BuiltinModule.vars(_main).__contains__(string('f')) ) );
Assert.IsTrue( VarIsTrue( BuiltinModule.dir(_main).Contains(string('f')) ) );
f := _main.Foo(); // new instance of class Foo
Log('Instanciate class Foo: ' + f);
f.Inc(); // call a method without any arg, because there's a default arg.
f.Inc(2); // call a method with one arg, overriding the default arg.
Assert.IsTrue( VarIsPythonNumber(f.Value) );
Assert.IsTrue( VarIsPythonInteger(f.Value) );
Assert.IsTrue( f.Value = _main.f.Value ); // compare the result with what we did in the script
Assert.IsTrue( f.GetValue() = _main.f.GetValue() ); // compare the result with what we did in the script
Assert.IsTrue( VarIsPython( f.GetSelf() ) );
Assert.IsTrue( VarIsSame( f.GetSelf(), f ) );
Assert.IsTrue( BuiltinModule.getattr(f, 'Value') = f.Value );
// python (+) operator overloading
a := _main.Foo(10);
b := _main.Foo(5);
c := a + b;
Assert.IsTrue(a.Value = 10);
Assert.IsTrue(b.Value = 5);
Assert.IsTrue(c.Value = 15);
Log('Test -> a, b, c : ' + a.Value + ', ' + b.Value + ', ' + c.Value);
// cascading calls
Assert.IsTrue( f.GetSelf().GetSelf().GetSelf().GetSelf().GetValue() = _main.f.GetValue() );
Assert.IsTrue( Boolean(f.__dict__.__contains__('Value')) );
Assert.IsTrue( VarIsTrue( BuiltinModule.hasattr(f, 'Value') ) );
_str := 'Value';
Assert.IsTrue( Boolean(f.__dict__.__contains__(_str)) ); // check with a string var
Assert.IsTrue( Boolean( BuiltinModule.hasattr(f, _str) ) );
val := f.Value;
f.Add(f); // passing itself as an argument
Assert.IsTrue( f.Value = val*2 );
// check param order
f.SetABC(1, 2, 3);
Assert.IsTrue(f.A = 1);
Assert.IsTrue(f.B = 2);
Assert.IsTrue(f.C = 3);
// add a property to an instance
f.Z := 99;
Assert.IsTrue(f.Z = 99);
// add a var to a module
_main.Z := 99;
Assert.IsTrue(_main.Z = 99);
// check none
Assert.IsTrue( VarIsNone(None) );
Assert.IsTrue( VarIsNone(VarPythonCreate([1, Null, 3]).GetItem(1)) ); // Null is casted to None
Assert.IsTrue( VarIsNone(VarPythonCreate([1, None, 3]).GetItem(1)) );
Assert.IsTrue( VarIsNone(f.Inc()) );
Assert.IsTrue( f.Inc() = None );
Assert.IsTrue( not Boolean(None) ); // if not None:
Assert.IsTrue( not VarIsTrue(None) ); // if not None:
Assert.IsTrue( Boolean(f) ); // if f:
Assert.IsTrue( VarIsTrue(f) ); // if f:
// call a function
Assert.IsTrue( _main.Add(2, 2) = 4 );
// call a function with a mix of regular parameters and named parameters
f := _main.MakeList(1, 2, 3, 4);
Assert.IsTrue(VarIsPythonList(f));
Assert.IsTrue(f.Length = 4);
Assert.IsTrue(f.GetItem(0) = 1);
Assert.IsTrue(f.GetItem(1) = 2);
Assert.IsTrue(f.GetItem(2) = 3);
Assert.IsTrue(f.GetItem(3) = 4);
f := _main.MakeList(1, d:=3, c:=4, b:=2);
Assert.IsTrue(VarIsPythonList(f));
Assert.IsTrue(f.Length = 4);
Assert.IsTrue(f.GetItem(0) = 1);
Assert.IsTrue(f.GetItem(1) = 2);
Assert.IsTrue(f.GetItem(2) = 4);
Assert.IsTrue(f.GetItem(3) = 3);
f := _main.MakeList(1, 2, d:= 3, c:=4);
Assert.IsTrue(VarIsPythonList(f));
Assert.IsTrue(f.Length = 4);
Assert.IsTrue(f.GetItem(0) = 1);
Assert.IsTrue(f.GetItem(1) = 2);
Assert.IsTrue(f.GetItem(2) = 4);
Assert.IsTrue(f.GetItem(3) = 3);
f := _main.MakeList(1, 2, 3, d:=4);
Assert.IsTrue(VarIsPythonList(f));
Assert.IsTrue(f.Length = 4);
Assert.IsTrue(f.GetItem(0) = 1);
Assert.IsTrue(f.GetItem(1) = 2);
Assert.IsTrue(f.GetItem(2) = 3);
Assert.IsTrue(f.GetItem(3) = 4);
f := _main.MakeList(b:=1, a:=2, d:= 3, c:=4);
Assert.IsTrue(VarIsPythonList(f));
Assert.IsTrue(f.Length = 4);
Assert.IsTrue(f.GetItem(0) = 2);
Assert.IsTrue(f.GetItem(1) = 1);
Assert.IsTrue(f.GetItem(2) = 4);
Assert.IsTrue(f.GetItem(3) = 3);
end;
procedure TVarPythTest.TestSequences;
var
a, b, c : Variant;
iter : Variant;
cpt : Integer;
begin
// initialize the operands
// you can either use the overloaded function with an array of const
// or use the VarArrayOf function that returns an array of variants that will
// be casted to a Python list.
a := VarPythonCreate([1, 2, 3]);
Assert.IsTrue(VarIsPython(a));
Assert.IsTrue(VarIsPythonSequence(a));
Assert.IsTrue(VarIsPythonList(a));
Assert.IsTrue(a.Length = 3); // this is a special property that does the same as: len(a) in Python
Assert.IsTrue(a.Length() = 3); // this is a special method that does the same as the special property
Assert.IsTrue(len(a) = 3);
Assert.IsTrue(a.GetItem(0) = 1); // this is a special method that lets you do the same as: a[0] in Python
Assert.IsTrue(a.GetItem(1) = 2);
Assert.IsTrue(a.GetItem(2) = 3);
Assert.IsTrue(string(a) = '[1, 2, 3]');
// indexed access using brackets when the sequence is a property of an object (module, instance...)
MainModule.a := VarPythonCreate([1, 2, 3]);
Assert.IsTrue(MainModule.a[1] = 2);
b := VarPythonCreate(VarArrayOf([4, 5, 6]));
Assert.IsTrue(VarIsPython(b));
Assert.IsTrue(VarIsPythonSequence(b));
Assert.IsTrue(VarIsPythonList(b));
Assert.IsTrue(b.Length = 3);
Assert.IsTrue(b.Length() = 3);
Assert.IsTrue(len(b) = 3);
Assert.IsTrue(b.GetItem(0) = 4);
Assert.IsTrue(b.GetItem(1) = 5);
Assert.IsTrue(b.GetItem(2) = 6);
Assert.IsTrue(string(b) = '[4, 5, 6]');
// concatenation
c := a + b;
// check result of operation
Assert.IsTrue(string(c) = '[1, 2, 3, 4, 5, 6]');
// check that operation did not change the content of operands.
Assert.IsTrue(string(a) = '[1, 2, 3]');
Assert.IsTrue(string(b) = '[4, 5, 6]');
// now with a litteral: note that with D6 SP1, we can't concatenate a custom variant with an var array of variants
c := a + b + VarPythonCreate(['Hello', 'World!', 3.14]);
Assert.IsTrue( string(c) = '[1, 2, 3, 4, 5, 6, ''Hello'', ''World!'', 3.14]' );
c := a + VarPythonCreate(['Hello', 'World!', 3.14]) + b;
Assert.IsTrue( string(c) = '[1, 2, 3, ''Hello'', ''World!'', 3.14, 4, 5, 6]' );
c := VarPythonCreate(['Hello', 'World!', 3.14]) + a + b;
Assert.IsTrue( string(c) = '[''Hello'', ''World!'', 3.14, 1, 2, 3, 4, 5, 6]' );
// multiplication
c := a * 3; // in Python the multiplication of sequence concatenates n times the sequence
Assert.IsTrue( string(c) = '[1, 2, 3, 1, 2, 3, 1, 2, 3]' );
// comparisons
//------------
// equal
c := a = b;
Assert.IsTrue(c = False);
c := a = a;
Assert.IsTrue(c = True);
Assert.IsTrue( string(a) = '[1, 2, 3]');
// not equal
c := a <> b;
Assert.IsTrue(c = True);
Assert.IsTrue( not (c = b) );
c := a <> a;
Assert.IsTrue(c = False);
Assert.IsTrue( string(a) = '[1, 2, 3]');
// greater than
c := a > b; Assert.IsTrue(c = False);
c := b > a; Assert.IsTrue(c = True);
Assert.IsTrue( string(a) > '[1, 1, 1]');
// greater or equal than
c := a >= b; Assert.IsTrue(c = False);
c := b >= a; Assert.IsTrue(c = True);
c := a >= a; Assert.IsTrue(c = True);
Assert.IsTrue( string(a) >= '[1, 2, 3]' );
// less than
c := a < b; Assert.IsTrue(c = True);
c := b < a; Assert.IsTrue(c = False);
Assert.IsTrue( string(a) < '[4, 4, 4]');
// less or equal than
c := a <= b; Assert.IsTrue(c = True);
c := b <= a; Assert.IsTrue(c = False);
c := a <= a; Assert.IsTrue(c = True);
Assert.IsTrue( string(a) <= '[1, 2, 3]');
// copy
c := a;
Assert.IsTrue( c = a);
Assert.IsTrue( VarIsSame(c, a) ); // checks if 2 variants share the same Python object.
// sequence methods:
c := b + a;
c.sort(); // note that you must you the parenthesis to distinguish the call between a method or a property.
Assert.IsTrue( c = (a+b) );
c := NewPythonList; // facility for building sequences
Assert.IsTrue( not VarIsTrue(c) ); // c is false because it's an empty collection
c.append(1);
c.append(2);
c.append(3);
Assert.IsTrue( VarIsTrue(c) ); // c is true because it's not an empty collection
Assert.IsTrue(c = a);
Assert.IsTrue( c.pop() = 3 );
Assert.IsTrue( string(c) = '[1, 2]');
c := NewPythonList(3); // facility for building sequences
c.SetItem(0, 1);
c.SetItem(1, 2);
c.SetItem(2, 3);
Assert.IsTrue(c = a);
c.DeleteItem(1);
Assert.IsTrue(c = VarPythonCreate([1,3]));
Assert.IsTrue(VarPythonCreate([1,2,3,4]).GetSlice(1, 3) = VarPythonCreate([2,3])); // same as x = [1,2,3,4]; x[1:3]
Assert.IsTrue(VarPythonCreate([1,2,3,4]).GetSlice(1, Ellipsis) = VarPythonCreate([2,3,4])); // same as x = [1,2,3,4]; x[1:]
Assert.IsTrue(VarPythonCreate([1,2,3,4]).GetSlice(1, -1) = VarPythonCreate([2,3])); // same as x = [1,2,3,4]; x[1:-1]
c := VarPythonCreate([1,2,3,4]);
c.SetSlice(1, 3, VarPythonCreate([7, 8, 9]));
Assert.IsTrue( c = VarPythonCreate([1, 7, 8, 9, 4]) );
Assert.IsTrue( Boolean(c.Contains( 7 )) ); // same as 7 in c
Assert.IsTrue( not Boolean(c.Contains( 77 )) );
c.DelSlice(1,3);
Assert.IsTrue( c = VarPythonCreate([1,9,4]) );
c := VarPythonCreate([1, 2, 3, 4], stTuple); // test a tuple
Assert.IsTrue( VarIsPythonTuple(c) );
Assert.IsTrue( VarIsPythonSequence(c) );
Assert.IsTrue( c.GetItem(1) = 2 );
Assert.IsTrue( c.Length = 4 );
c := NewPythonTuple(3);
c.SetItem(0, 1);
c.SetItem(1, 2);
c.SetItem(2, 3);
Assert.IsTrue( VarIsPythonTuple(c) );
Assert.IsTrue( VarIsPythonSequence(c) );
Assert.IsTrue( c.GetItem(1) = 2 );
Assert.IsTrue( c.Length = 3 );
// test iterator
iter := BuiltinModule.iter(VarPythonCreate([1, 2, 3, 4], stTuple));
Assert.IsTrue(VarIsPythonIterator(iter));
Assert.IsTrue(iter.__next__() = 1);
Assert.IsTrue(iter.__next__() = 2);
Assert.IsTrue(iter.__next__() = 3);
Assert.IsTrue(iter.__next__() = 4);
try
iter.__next__();
except
on E: EPyStopIteration do
begin
Assert.IsTrue(True); //Ok.
end
else
Assert.IsTrue(False, 'expected stop exception');
end;
cpt := 0;
iter := VarPyth.iter(VarPythonCreate([1, 2, 3, 4], stTuple));
Assert.IsTrue(VarIsPythonIterator(iter));
try
while True do
begin
a := iter.__next__();
Inc(cpt);
Assert.IsTrue(a = cpt);
end;
except
on E: EPyStopIteration do
begin
Assert.IsTrue(True); //Ok.
end
else
Assert.IsTrue(False, 'expected stop exception');
end;
Assert.IsTrue(cpt = 4);
end;
procedure TVarPythTest.TestStrings;
var
a, b, c : Variant;
w : WideString;
_obj : PPyObject;
begin
// initialize the operands
a := VarPythonCreate('abc');
Assert.IsTrue(VarIsPython(a));
Assert.IsTrue(VarIsPythonString(a));
Assert.IsTrue(string(a) = 'abc');
b := VarPythonCreate('def');
Assert.IsTrue(VarIsPython(b));
Assert.IsTrue(VarIsPythonString(b));
Assert.IsTrue(string(b) = 'def');
// concatenation
c := a + b;
// check result of operation
Assert.IsTrue( string(c) = 'abcdef' );
// check that operation did not change the content of operands.
Assert.IsTrue(string(a) = 'abc');
Assert.IsTrue(string(b) = 'def');
// now with a litteral
c := a + b + '!';
Assert.IsTrue( string(c) = 'abcdef!' );
c := a + '!' + b;
Assert.IsTrue( string(c) = 'abc!def' );
c := '!' + a + b;
Assert.IsTrue( string(c) = '!abcdef' );
// multiplication
c := a * 3; // in Python the multiplication of string concatenates n times the string
Assert.IsTrue( string(c) = 'abcabcabc' );
// comparisons
//------------
// equal
c := a = b;
Assert.IsTrue(c = False);
c := a = a;
Assert.IsTrue(c = True);
Assert.IsTrue( a = 'abc');