43 lines
1.2 KiB
Ruby
43 lines
1.2 KiB
Ruby
require_relative '../../spec_helper'
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describe "ENV.delete" do
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before :each do
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@saved_foo = ENV["foo"]
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end
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after :each do
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ENV["foo"] = @saved_foo
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end
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it "removes the variable from the environment" do
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ENV["foo"] = "bar"
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ENV.delete("foo")
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ENV["foo"].should == nil
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end
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it "returns the previous value" do
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ENV["foo"] = "bar"
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ENV.delete("foo").should == "bar"
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end
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it "returns nil if the named environment variable does not exist and no block given" do
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ENV.delete("foo")
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ENV.delete("foo").should == nil
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end
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it "yields the name to the given block if the named environment variable does not exist" do
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ENV.delete("foo")
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ENV.delete("foo") { |name| ScratchPad.record name }
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ScratchPad.recorded.should == "foo"
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end
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it "does not evaluate the block if the environment variable exists" do
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ENV["foo"] = "bar"
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ENV.delete("foo") { |name| fail "Should not happen" }
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ENV["foo"].should == nil
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end
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it "raises TypeError if the argument is not a String and does not respond to #to_str" do
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-> { ENV.delete(Object.new) }.should raise_error(TypeError, "no implicit conversion of Object into String")
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end
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end
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