isl_test_python.py

   1 # Copyright 2016-2017 Tobias Grosser
   2 #
   3 # Use of this software is governed by the MIT license
   4 #
   5 # Written by Tobias Grosser, Weststrasse 47, CH-8003, Zurich
   6
   7 import sys
   8 import isl
   9
  10 # Test that isl objects can be constructed.
  11 #
  12 # This tests:
  13 #  - construction from a string
  14 #  - construction from an integer
  15 #  - static constructor without a parameter
  16 #  - conversion construction
  17 #
  18 #  The tests to construct from integers and strings cover functionality that
  19 #  is also tested in the parameter type tests, but here the presence of
  20 #  multiple overloaded constructors and overload resolution is tested.
  21 #
  22 def test_constructors():
  23         zero1 = isl.val("0")
  24         assert(zero1.is_zero())
  25
  26         zero2 = isl.val(0)
  27         assert(zero2.is_zero())
  28
  29         zero3 = isl.val.zero()
  30         assert(zero3.is_zero())
  31
  32         bs = isl.basic_set("{ [1] }")
  33         result = isl.set("{ [1] }")
  34         s = isl.set(bs)
  35         assert(s.is_equal(result))
  36
  37 # Test integer function parameters for a particular integer value.
  38 #
  39 def test_int(i):
  40         val_int = isl.val(i)
  41         val_str = isl.val(str(i))
  42         assert(val_int.eq(val_str))
  43
  44 # Test integer function parameters.
  45 #
  46 # Verify that extreme values and zero work.
  47 #
  48 def test_parameters_int():
  49         test_int(sys.maxsize)
  50         test_int(-sys.maxsize - 1)
  51         test_int(0)
  52
  53 # Test isl objects parameters.
  54 #
  55 # Verify that isl objects can be passed as lvalue and rvalue parameters.
  56 # Also verify that isl object parameters are automatically type converted if
  57 # there is an inheritance relation. Finally, test function calls without
  58 # any additional parameters, apart from the isl object on which
  59 # the method is called.
  60 #
  61 def test_parameters_obj():
  62         a = isl.set("{ [0] }")
  63         b = isl.set("{ [1] }")
  64         c = isl.set("{ [2] }")
  65         expected = isl.set("{ [i] : 0 <= i <= 2 }")
  66
  67         tmp = a.union(b)
  68         res_lvalue_param = tmp.union(c)
  69         assert(res_lvalue_param.is_equal(expected))
  70
  71         res_rvalue_param = a.union(b).union(c)
  72         assert(res_rvalue_param.is_equal(expected))
  73
  74         a2 = isl.basic_set("{ [0] }")
  75         assert(a.is_equal(a2))
  76
  77         two = isl.val(2)
  78         half = isl.val("1/2")
  79         res_only_this_param = two.inv()
  80         assert(res_only_this_param.eq(half))
  81
  82 # Test different kinds of parameters to be passed to functions.
  83 #
  84 # This includes integer and isl object parameters.
  85 #
  86 def test_parameters():
  87         test_parameters_int()
  88         test_parameters_obj()
  89
  90 # Test that isl objects are returned correctly.
  91 #
  92 # This only tests that after combining two objects, the result is successfully
  93 # returned.
  94 #
  95 def test_return_obj():
  96         one = isl.val("1")
  97         two = isl.val("2")
  98         three = isl.val("3")
  99
 100         res = one.add(two)
 101
 102         assert(res.eq(three))
 103
 104 # Test that integer values are returned correctly.
 105 #
 106 def test_return_int():
 107         one = isl.val("1")
 108         neg_one = isl.val("-1")
 109         zero = isl.val("0")
 110
 111         assert(one.sgn() > 0)
 112         assert(neg_one.sgn() < 0)
 113         assert(zero.sgn() == 0)
 114
 115 # Test that isl_bool values are returned correctly.
 116 #
 117 # In particular, check the conversion to bool in case of true and false.
 118 #
 119 def test_return_bool():
 120         empty = isl.set("{ : false }")
 121         univ = isl.set("{ : }")
 122
 123         b_true = empty.is_empty()
 124         b_false = univ.is_empty()
 125
 126         assert(b_true)
 127         assert(not b_false)
 128
 129 # Test that strings are returned correctly.
 130 # Do so by calling overloaded isl.ast_build.from_expr methods.
 131 #
 132 def test_return_string():
 133         context = isl.set("[n] -> { : }")
 134         build = isl.ast_build.from_context(context)
 135         pw_aff = isl.pw_aff("[n] -> { [n] }")
 136         set = isl.set("[n] -> { : n >= 0 }")
 137
 138         expr = build.expr_from(pw_aff)
 139         expected_string = "n"
 140         assert(expected_string == expr.to_C_str())
 141
 142         expr = build.expr_from(set)
 143         expected_string = "n >= 0"
 144         assert(expected_string == expr.to_C_str())
 145
 146 # Test that return values are handled correctly.
 147 #
 148 # Test that isl objects, integers, boolean values, and strings are
 149 # returned correctly.
 150 #
 151 def test_return():
 152         test_return_obj()
 153         test_return_int()
 154         test_return_bool()
 155         test_return_string()
 156
 157 # Test that foreach functions are modeled correctly.
 158 #
 159 # Verify that closures are correctly called as callback of a 'foreach'
 160 # function and that variables captured by the closure work correctly. Also
 161 # check that the foreach function handles exceptions thrown from
 162 # the closure and that it propagates the exception.
 163 #
 164 def test_foreach():
 165         s = isl.set("{ [0]; [1]; [2] }")
 166
 167         list = []
 168         def add(bs):
 169                 list.append(bs)
 170         s.foreach_basic_set(add)
 171
 172         assert(len(list) == 3)
 173         assert(list[0].is_subset(s))
 174         assert(list[1].is_subset(s))
 175         assert(list[2].is_subset(s))
 176         assert(not list[0].is_equal(list[1]))
 177         assert(not list[0].is_equal(list[2]))
 178         assert(not list[1].is_equal(list[2]))
 179
 180         def fail(bs):
 181                 raise "fail"
 182
 183         caught = False
 184         try:
 185                 s.foreach_basic_set(fail)
 186         except:
 187                 caught = True
 188         assert(caught)
 189
 190 # Test the isl Python interface
 191 #
 192 # This includes:
 193 #  - Object construction
 194 #  - Different parameter types
 195 #  - Different return types
 196 #  - Foreach functions
 197 #
 198 test_constructors()
 199 test_parameters()
 200 test_return()
 201 test_foreach()