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130 lines
4.9 KiB
Ruby
130 lines
4.9 KiB
Ruby
# -*- encoding: utf-8 -*-
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require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "String#center with length, padding" do
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it "returns a new string of specified length with self centered and padded with padstr" do
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"one".center(9, '.').should == "...one..."
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"hello".center(20, '123').should == "1231231hello12312312"
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"middle".center(13, '-').should == "---middle----"
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"".center(1, "abcd").should == "a"
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"".center(2, "abcd").should == "aa"
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"".center(3, "abcd").should == "aab"
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"".center(4, "abcd").should == "abab"
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"".center(6, "xy").should == "xyxxyx"
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"".center(11, "12345").should == "12345123451"
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"|".center(2, "abcd").should == "|a"
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"|".center(3, "abcd").should == "a|a"
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"|".center(4, "abcd").should == "a|ab"
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"|".center(5, "abcd").should == "ab|ab"
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"|".center(6, "xy").should == "xy|xyx"
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"|".center(7, "xy").should == "xyx|xyx"
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"|".center(11, "12345").should == "12345|12345"
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"|".center(12, "12345").should == "12345|123451"
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"||".center(3, "abcd").should == "||a"
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"||".center(4, "abcd").should == "a||a"
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"||".center(5, "abcd").should == "a||ab"
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"||".center(6, "abcd").should == "ab||ab"
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"||".center(8, "xy").should == "xyx||xyx"
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"||".center(12, "12345").should == "12345||12345"
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"||".center(13, "12345").should == "12345||123451"
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end
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it "pads with whitespace if no padstr is given" do
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"two".center(5).should == " two "
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"hello".center(20).should == " hello "
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end
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it "returns self if it's longer than or as long as the specified length" do
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"".center(0).should == ""
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"".center(-1).should == ""
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"hello".center(4).should == "hello"
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"hello".center(-1).should == "hello"
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"this".center(3).should == "this"
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"radiology".center(8, '-').should == "radiology"
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end
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it "calls #to_int to convert length to an integer" do
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"_".center(3.8, "^").should == "^_^"
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obj = mock('3')
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obj.should_receive(:to_int).and_return(3)
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"_".center(obj, "o").should == "o_o"
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end
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it "raises a TypeError when length can't be converted to an integer" do
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-> { "hello".center("x") }.should raise_error(TypeError)
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-> { "hello".center("x", "y") }.should raise_error(TypeError)
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-> { "hello".center([]) }.should raise_error(TypeError)
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-> { "hello".center(mock('x')) }.should raise_error(TypeError)
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end
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it "calls #to_str to convert padstr to a String" do
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padstr = mock('123')
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padstr.should_receive(:to_str).and_return("123")
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"hello".center(20, padstr).should == "1231231hello12312312"
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end
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it "raises a TypeError when padstr can't be converted to a string" do
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-> { "hello".center(20, 100) }.should raise_error(TypeError)
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-> { "hello".center(20, []) }.should raise_error(TypeError)
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-> { "hello".center(20, mock('x')) }.should raise_error(TypeError)
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end
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it "raises an ArgumentError if padstr is empty" do
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-> { "hello".center(10, "") }.should raise_error(ArgumentError)
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-> { "hello".center(0, "") }.should raise_error(ArgumentError)
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end
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ruby_version_is ''...'3.0' do
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it "returns subclass instances when called on subclasses" do
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StringSpecs::MyString.new("").center(10).should be_an_instance_of(StringSpecs::MyString)
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StringSpecs::MyString.new("foo").center(10).should be_an_instance_of(StringSpecs::MyString)
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StringSpecs::MyString.new("foo").center(10, StringSpecs::MyString.new("x")).should be_an_instance_of(StringSpecs::MyString)
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"".center(10, StringSpecs::MyString.new("x")).should be_an_instance_of(String)
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"foo".center(10, StringSpecs::MyString.new("x")).should be_an_instance_of(String)
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end
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end
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ruby_version_is '3.0' do
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it "returns String instances when called on subclasses" do
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StringSpecs::MyString.new("").center(10).should be_an_instance_of(String)
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StringSpecs::MyString.new("foo").center(10).should be_an_instance_of(String)
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StringSpecs::MyString.new("foo").center(10, StringSpecs::MyString.new("x")).should be_an_instance_of(String)
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"".center(10, StringSpecs::MyString.new("x")).should be_an_instance_of(String)
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"foo".center(10, StringSpecs::MyString.new("x")).should be_an_instance_of(String)
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end
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end
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describe "with width" do
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it "returns a String in the same encoding as the original" do
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str = "abc".force_encoding Encoding::IBM437
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result = str.center 6
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result.should == " abc "
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result.encoding.should equal(Encoding::IBM437)
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end
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end
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describe "with width, pattern" do
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it "returns a String in the compatible encoding" do
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str = "abc".force_encoding Encoding::IBM437
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result = str.center 6, "あ"
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result.should == "あabcああ"
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result.encoding.should equal(Encoding::UTF_8)
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end
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it "raises an Encoding::CompatibilityError if the encodings are incompatible" do
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pat = "ア".encode Encoding::EUC_JP
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-> do
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"あれ".center 5, pat
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end.should raise_error(Encoding::CompatibilityError)
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end
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end
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end
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