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-rw-r--r--spec/ruby/shared/complex/arg.rb9
1 files changed, 9 insertions, 0 deletions
diff --git a/spec/ruby/shared/complex/arg.rb b/spec/ruby/shared/complex/arg.rb
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+++ b/spec/ruby/shared/complex/arg.rb
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+describe :complex_arg, shared: true do
+ it "returns the argument -- i.e., the angle from (1, 0) in the complex plane" do
+ two_pi = 2 * Math::PI
+ (Complex(1, 0).send(@method) % two_pi).should be_close(0, TOLERANCE)
+ (Complex(0, 2).send(@method) % two_pi).should be_close(Math::PI * 0.5, TOLERANCE)
+ (Complex(-100, 0).send(@method) % two_pi).should be_close(Math::PI, TOLERANCE)
+ (Complex(0, -75.3).send(@method) % two_pi).should be_close(Math::PI * 1.5, TOLERANCE)
+ end
+end