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# Copyright 2016-2017 Tobias Grosser
#
# Use of this software is governed by the MIT license
#
# Written by Tobias Grosser, Weststrasse 47, CH-8003, Zurich
import sys
import isl
# Test that isl objects can be constructed.
#
# This tests:
# - construction from a string
# - construction from an integer
# - static constructor without a parameter
# - conversion construction
#
# The tests to construct from integers and strings cover functionality that
# is also tested in the parameter type tests, but here the presence of
# multiple overloaded constructors and overload resolution is tested.
#
def test_constructors():
zero1 = isl.val("0")
assert(zero1.is_zero())
zero2 = isl.val(0)
assert(zero2.is_zero())
zero3 = isl.val.zero()
assert(zero3.is_zero())
bs = isl.basic_set("{ [1] }")
result = isl.set("{ [1] }")
s = isl.set(bs)
assert(s.is_equal(result))
# Test integer function parameters for a particular integer value.
#
def test_int(i):
val_int = isl.val(i)
val_str = isl.val(str(i))
assert(val_int.eq(val_str))
# Test integer function parameters.
#
# Verify that extreme values and zero work.
#
def test_parameters_int():
test_int(sys.maxsize)
test_int(-sys.maxsize - 1)
test_int(0)
# Test isl objects parameters.
#
# Verify that isl objects can be passed as lvalue and rvalue parameters.
# Also verify that isl object parameters are automatically type converted if
# there is an inheritance relation. Finally, test function calls without
# any additional parameters, apart from the isl object on which
# the method is called.
#
def test_parameters_obj():
a = isl.set("{ [0] }")
b = isl.set("{ [1] }")
c = isl.set("{ [2] }")
expected = isl.set("{ [i] : 0 <= i <= 2 }")
tmp = a.union(b)
res_lvalue_param = tmp.union(c)
assert(res_lvalue_param.is_equal(expected))
res_rvalue_param = a.union(b).union(c)
assert(res_rvalue_param.is_equal(expected))
a2 = isl.basic_set("{ [0] }")
assert(a.is_equal(a2))
two = isl.val(2)
half = isl.val("1/2")
res_only_this_param = two.inv()
assert(res_only_this_param.eq(half))
# Test different kinds of parameters to be passed to functions.
#
# This includes integer and isl object parameters.
#
def test_parameters():
test_parameters_int()
test_parameters_obj()
# Test that isl objects are returned correctly.
#
# This only tests that after combining two objects, the result is successfully
# returned.
#
def test_return_obj():
one = isl.val("1")
two = isl.val("2")
three = isl.val("3")
res = one.add(two)
assert(res.eq(three))
# Test that integer values are returned correctly.
#
def test_return_int():
one = isl.val("1")
neg_one = isl.val("-1")
zero = isl.val("0")
assert(one.sgn() > 0)
assert(neg_one.sgn() < 0)
assert(zero.sgn() == 0)
# Test that isl_bool values are returned correctly.
#
# In particular, check the conversion to bool in case of true and false.
#
def test_return_bool():
empty = isl.set("{ : false }")
univ = isl.set("{ : }")
b_true = empty.is_empty()
b_false = univ.is_empty()
assert(b_true)
assert(not b_false)
# Test that strings are returned correctly.
# Do so by calling overloaded isl.ast_build.from_expr methods.
#
def test_return_string():
context = isl.set("[n] -> { : }")
build = isl.ast_build.from_context(context)
pw_aff = isl.pw_aff("[n] -> { [n] }")
set = isl.set("[n] -> { : n >= 0 }")
expr = build.expr_from(pw_aff)
expected_string = "n"
assert(expected_string == expr.to_C_str())
expr = build.expr_from(set)
expected_string = "n >= 0"
assert(expected_string == expr.to_C_str())
# Test that return values are handled correctly.
#
# Test that isl objects, integers, boolean values, and strings are
# returned correctly.
#
def test_return():
test_return_obj()
test_return_int()
test_return_bool()
test_return_string()
# Test that foreach functions are modeled correctly.
#
# Verify that closures are correctly called as callback of a 'foreach'
# function and that variables captured by the closure work correctly. Also
# check that the foreach function handles exceptions thrown from
# the closure and that it propagates the exception.
#
def test_foreach():
s = isl.set("{ [0]; [1]; [2] }")
list = []
def add(bs):
list.append(bs)
s.foreach_basic_set(add)
assert(len(list) == 3)
assert(list[0].is_subset(s))
assert(list[1].is_subset(s))
assert(list[2].is_subset(s))
assert(not list[0].is_equal(list[1]))
assert(not list[0].is_equal(list[2]))
assert(not list[1].is_equal(list[2]))
def fail(bs):
raise "fail"
caught = False
try:
s.foreach_basic_set(fail)
except:
caught = True
assert(caught)
# Test the isl Python interface
#
# This includes:
# - Object construction
# - Different parameter types
# - Different return types
# - Foreach functions
#
test_constructors()
test_parameters()
test_return()
test_foreach()
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