Fixed float tolerance in tests when MRB_USE_FLOAT is set

mrbgems/mruby-test/driver.c

@@ -94,6 +94,12 @@ mrb_init_test_driver(mrb_state *mrb, mrb_bool verbose)
   mrb_define_const(mrb, mrbtest, "FIXNUM_MIN", mrb_fixnum_value(MRB_INT_MIN));
   mrb_define_const(mrb, mrbtest, "FIXNUM_BIT", mrb_fixnum_value(MRB_INT_BIT));
 
+#ifdef MRB_USE_FLOAT
+  mrb_define_const(mrb, mrbtest, "FLOAT_TOLERANCE", mrb_float_value(mrb, 1e-6));
+#else
+  mrb_define_const(mrb, mrbtest, "FLOAT_TOLERANCE", mrb_float_value(mrb, 1e-12));
+#endif
+
   if (verbose) {
     mrb_gv_set(mrb, mrb_intern_lit(mrb, "$mrbtest_verbose"), mrb_true_value());
   }

test/assert.rb

@@ -232,7 +232,7 @@ end
 ##
 # Performs fuzzy check for equality on methods returning floats
 def check_float(a, b)
-  tolerance = 1e-12
+  tolerance = Mrbtest::FLOAT_TOLERANCE
   a = a.to_f
   b = b.to_f
   if a.finite? and b.finite?