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require_relative '../../../spec_helper'
require_relative '../fixtures/classes'
describe :hash_to_s, shared: true do
it "returns a string representation with same order as each()" do
h = { a: [1, 2], b: -2, d: -6, nil => nil }
pairs = []
h.each do |key, value|
pairs << key.inspect + '=>' + value.inspect
end
str = '{' + pairs.join(', ') + '}'
h.send(@method).should == str
end
it "calls #inspect on keys and values" do
key = mock('key')
val = mock('val')
key.should_receive(:inspect).and_return('key')
val.should_receive(:inspect).and_return('val')
{ key => val }.send(@method).should == '{key=>val}'
end
it "does not call #to_s on a String returned from #inspect" do
str = "abc"
str.should_not_receive(:to_s)
{ a: str }.send(@method).should == '{:a=>"abc"}'
end
it "calls #to_s on the object returned from #inspect if the Object isn't a String" do
obj = mock("Hash#inspect/to_s calls #to_s")
obj.should_receive(:inspect).and_return(obj)
obj.should_receive(:to_s).and_return("abc")
{ a: obj }.send(@method).should == "{:a=>abc}"
end
it "does not call #to_str on the object returned from #inspect when it is not a String" do
obj = mock("Hash#inspect/to_s does not call #to_str")
obj.should_receive(:inspect).and_return(obj)
obj.should_not_receive(:to_str)
{ a: obj }.send(@method).should =~ /^\{:a=>#<MockObject:0x[0-9a-f]+>\}$/
end
it "does not call #to_str on the object returned from #to_s when it is not a String" do
obj = mock("Hash#inspect/to_s does not call #to_str on #to_s result")
obj.should_receive(:inspect).and_return(obj)
obj.should_receive(:to_s).and_return(obj)
obj.should_not_receive(:to_str)
{ a: obj }.send(@method).should =~ /^\{:a=>#<MockObject:0x[0-9a-f]+>\}$/
end
it "does not swallow exceptions raised by #to_s" do
obj = mock("Hash#inspect/to_s does not swallow #to_s exceptions")
obj.should_receive(:inspect).and_return(obj)
obj.should_receive(:to_s).and_raise(Exception)
-> { { a: obj }.send(@method) }.should raise_error(Exception)
end
it "handles hashes with recursive values" do
x = {}
x[0] = x
x.send(@method).should == '{0=>{...}}'
x = {}
y = {}
x[0] = y
y[1] = x
x.send(@method).should == "{0=>{1=>{...}}}"
y.send(@method).should == "{1=>{0=>{...}}}"
end
it "does not raise if inspected result is not default external encoding" do
utf_16be = mock("utf_16be")
utf_16be.should_receive(:inspect).and_return(%<"utf_16be \u3042">.encode!(Encoding::UTF_16BE))
{a: utf_16be}.send(@method).should == '{:a=>"utf_16be \u3042"}'
end
it "works for keys and values whose #inspect return a frozen String" do
{ true => false }.to_s.should == "{true=>false}"
end
end
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