tests: Rename test scripts, changing - to _ for consistency.

From now on, all new tests must use underscore.

Addresses issue #727.

tests/float/math_fun.py

@@ -0,0 +1,51 @@
+# Tests the functions imported from math
+
+try:
+    from math import *
+except ImportError:
+    print("SKIP")
+    import sys
+    sys.exit()
+
+test_values = [-100., -1.23456, -1, -0.5, 0.0, 0.5, 1.23456, 100.]
+p_test_values = [0.1, 0.5, 1.23456]
+unit_range_test_values = [-1., -0.75, -0.5, -0.25, 0., 0.25, 0.5, 0.75, 1.]
+
+functions = [('sqrt', sqrt, p_test_values),
+             ('exp', exp, test_values),
+             ('expm1', expm1, test_values),
+             ('log', log, p_test_values),
+             ('log2', log2, p_test_values),
+             ('log10', log10, p_test_values),
+             ('cosh', cosh, test_values),
+             ('sinh', sinh, test_values),
+             ('tanh', tanh, test_values),
+             ('acosh', acosh, [1.0, 5.0, 1.0]),
+             ('asinh', asinh, test_values),
+             ('atanh', atanh, [-0.99, -0.5, 0.0, 0.5, 0.99]),
+             ('cos', cos, test_values),
+             ('sin', sin, test_values),
+             ('tan', tan, test_values),
+             ('acos', acos, unit_range_test_values),
+             ('asin', asin, unit_range_test_values),
+             ('atan', atan, test_values),
+             ('ceil', ceil, test_values),
+             ('fabs', fabs, test_values),
+             ('floor', floor, test_values),
+             #('frexp', frexp, test_values),
+             ('trunc', trunc, test_values)
+            ]
+
+for function_name, function, test_vals in functions:
+    print(function_name)
+    for value in test_vals:
+        print("{:.7g}".format(function(value)))
+
+binary_functions = [('copysign', copysign, [(23., 42.), (-23., 42.), (23., -42.),
+                                (-23., -42.), (1., 0.0), (1., -0.0)])
+                   ]
+
+for function_name, function, test_vals in binary_functions:
+    print(function_name)
+    for value1, value2 in test_vals:
+        print("{:.7g}".format(function(value1, value2)))