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bin/gems/facets-3.1.0/test/standard/math/test_root.rb

@@ -0,0 +1,15 @@
+require 'facets/math/root'
+require 'facets/numeric/range'
+
+test_case Math do
+
+  class_method :root do
+    test do
+      Math.root( 64.0,    3.0).range(1.0e-6).assert === 4.0
+      Math.root(  0.729,  3.0).range(1.0e-6).assert === 0.9
+      Math.root(  2.0,   -0.5).range(1.0e-6).assert === 0.25
+      Math.root(  0.25,  -1.0/3).range(1.0e-6).assert === 64.0
+    end
+  end
+
+end