tests/float: Test domain errors for more combos of args to math funcs.

Instead of having a special set of arguments to test for each math-module
function, just test all functions with all sets of arguments.  This gives
improved test cases to prevent regressions.

Signed-off-by: Damien George <[email protected]>

Author: dpgeorge

tests/float/math_domain.py

@@ -10,25 +10,25 @@
 nan = float("nan")
 
 # single argument functions
-for name, f, args in (
-    ("fabs", math.fabs, ()),
-    ("ceil", math.ceil, ()),
-    ("floor", math.floor, ()),
-    ("trunc", math.trunc, ()),
-    ("sqrt", math.sqrt, (-1, 0)),
-    ("exp", math.exp, ()),
-    ("log", math.log, ()),
-    ("sin", math.sin, ()),
-    ("cos", math.cos, ()),
-    ("tan", math.tan, ()),
-    ("asin", math.asin, (-1.1, 1, 1.1)),
-    ("acos", math.acos, (-1.1, 1, 1.1)),
-    ("atan", math.atan, ()),
-    ("ldexp", lambda x: math.ldexp(x, 0), ()),
-    ("radians", math.radians, ()),
-    ("degrees", math.degrees, ()),
+for name, f in (
+    ("fabs", math.fabs),
+    ("ceil", math.ceil),
+    ("floor", math.floor),
+    ("trunc", math.trunc),
+    ("sqrt", math.sqrt),
+    ("exp", math.exp),
+    ("log", math.log),
+    ("sin", math.sin),
+    ("cos", math.cos),
+    ("tan", math.tan),
+    ("asin", math.asin),
+    ("acos", math.acos),
+    ("atan", math.atan),
+    ("ldexp", lambda x: math.ldexp(x, 0)),
+    ("radians", math.radians),
+    ("degrees", math.degrees),
 ):
-    for x in args + (inf, -inf, nan):
+    for x in (0, 1, 1.1, -1, -1.1, inf, -inf, nan):
         try:
             ans = "%.4f" % f(x)
         except ValueError:
@@ -38,35 +38,54 @@
         print("%s(%.4f) = %s" % (name, x, ans))
 
 # double argument functions
-for name, f, args in (
-    (
-        "pow",
-        math.pow,
-        (
-            (0, 2),
-            (-1, 2),
-            (0, -1),
-            (-1, 2.3),
-            (0.5, inf),
-            (-0.5, inf),
-            (0.5, -inf),
-            (-0.5, -inf),
-            (1.5, inf),
-            (-1.5, inf),
-            (1.5, -inf),
-            (-1.5, -inf),
-            (nan, 0),
-            (1, nan),
-        ),
-    ),
-    ("log", math.log, ()),
-    ("fmod", math.fmod, ((1.2, inf), (1.2, -inf), (1.2, 0), (inf, 1.2))),
-    ("atan2", math.atan2, ((0, 0), (-inf, inf), (-inf, -inf), (inf, -inf))),
-    ("copysign", math.copysign, ()),
+for name, f in (
+    ("pow", math.pow),
+    ("log", math.log),
+    ("fmod", math.fmod),
+    ("atan2", math.atan2),
+    ("copysign", math.copysign),
 ):
-    for x in args + ((0, inf), (inf, 0), (inf, inf), (inf, nan), (nan, inf), (nan, nan)):
+    for x in (
+        (0, 0),
+        (0, 2),
+        (0, -1),
+        (1, 0),
+        (1.2, 0),
+        (-1, 0),
+        (-1, 2),
+        (-1, 2.3),
+        (0, inf),
+        (0.5, inf),
+        (0.5, -inf),
+        (0.9, inf),
+        (0.9, -inf),
+        (1.2, inf),
+        (1.2, -inf),
+        (-0.5, inf),
+        (-0.5, -inf),
+        (-0.9, inf),
+        (-0.9, -inf),
+        (-1.2, inf),
+        (-1.2, -inf),
+        (inf, 0),
+        (inf, 1.2),
+        (inf, -1.2),
+        (inf, inf),
+        (inf, -inf),
+        (-inf, inf),
+        (-inf, -inf),
+        (0, nan),
+        (nan, 0),
+        (1, nan),
+        (nan, 1),
+        (inf, nan),
+        (nan, inf),
+        (nan, nan),
+    ):
         try:
             ans = "%.4f" % f(*x)
         except ValueError:
             ans = "ValueError"
+        except ZeroDivisionError:
+            ans = "ZeroDivisionError"
         print("%s(%.4f, %.4f) = %s" % (name, x[0], x[1], ans))

tests/float/math_domain_python311.py

@@ -0,0 +1,26 @@
+# Tests domain errors in math functions.
+# This is split out from math_domain.py because math.pow(0, -inf) was changed
+# in Python 3.11, and so this test requires a .py.exp file.
+# (See https://github.com/python/cpython/issues/88505)
+
+try:
+    import math
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+inf = float("inf")
+
+for name, f in (
+    ("pow", math.pow),
+    ("log", math.log),
+    ("fmod", math.fmod),
+    ("atan2", math.atan2),
+    ("copysign", math.copysign),
+):
+    for x in ((0, -inf),):
+        try:
+            ans = "%.4f" % f(*x)
+        except ValueError:
+            ans = "ValueError"
+        print("%s(%.4f, %.4f) = %s" % (name, x[0], x[1], ans))

tests/float/math_domain_python311.py.exp

@@ -0,0 +1,5 @@
+pow(0.0000, -inf) = inf
+log(0.0000, -inf) = ValueError
+fmod(0.0000, -inf) = 0.0000
+atan2(0.0000, -inf) = 3.1416
+copysign(0.0000, -inf) = -0.0000