diff options
Diffstat (limited to 'spec/ruby/core/kernel/Float_spec.rb')
| -rw-r--r-- | spec/ruby/core/kernel/Float_spec.rb | 156 |
1 files changed, 112 insertions, 44 deletions
diff --git a/spec/ruby/core/kernel/Float_spec.rb b/spec/ruby/core/kernel/Float_spec.rb index 015bcb33d6..9c436b05f7 100644 --- a/spec/ruby/core/kernel/Float_spec.rb +++ b/spec/ruby/core/kernel/Float_spec.rb @@ -41,7 +41,7 @@ describe :kernel_float, shared: true do end it "converts Strings to floats without calling #to_f" do - string = "10" + string = +"10" string.should_not_receive(:to_f) @object.send(:Float, string).should == 10.0 end @@ -157,6 +157,26 @@ describe :kernel_float, shared: true do @object.send(:Float, "1\t\n").should == 1.0 end + ruby_version_is ""..."3.4" do + it "raises ArgumentError if a fractional part is missing" do + -> { @object.send(:Float, "1.") }.should raise_error(ArgumentError) + -> { @object.send(:Float, "+1.") }.should raise_error(ArgumentError) + -> { @object.send(:Float, "-1.") }.should raise_error(ArgumentError) + -> { @object.send(:Float, "1.e+0") }.should raise_error(ArgumentError) + -> { @object.send(:Float, "1.e-2") }.should raise_error(ArgumentError) + end + end + + ruby_version_is "3.4" do + it "allows String representation without a fractional part" do + @object.send(:Float, "1.").should == 1.0 + @object.send(:Float, "+1.").should == 1.0 + @object.send(:Float, "-1.").should == -1.0 + @object.send(:Float, "1.e+0").should == 1.0 + @object.send(:Float, "1.e-2").should be_close(0.01, TOLERANCE) + end + end + %w(e E).each do |e| it "raises an ArgumentError if #{e} is the trailing character" do -> { @object.send(:Float, "2#{e}") }.should raise_error(ArgumentError) @@ -204,59 +224,107 @@ describe :kernel_float, shared: true do end end - describe "for hexadecimal literals with binary exponent" do - %w(p P).each do |p| - it "interprets the fractional part (on the left side of '#{p}') in hexadecimal" do - @object.send(:Float, "0x10#{p}0").should == 16.0 - end - - it "interprets the exponent (on the right of '#{p}') in decimal" do - @object.send(:Float, "0x1#{p}10").should == 1024.0 - end - - it "raises an ArgumentError if #{p} is the trailing character" do - -> { @object.send(:Float, "0x1#{p}") }.should raise_error(ArgumentError) - end - - it "raises an ArgumentError if #{p} is the leading character" do - -> { @object.send(:Float, "0x#{p}1") }.should raise_error(ArgumentError) - end + context "for hexadecimal literals" do + it "interprets the 0x prefix as hexadecimal" do + @object.send(:Float, "0x10").should == 16.0 + @object.send(:Float, "0x0F").should == 15.0 + @object.send(:Float, "0x0f").should == 15.0 + end - it "returns Infinity for '0x1#{p}10000'" do - @object.send(:Float, "0x1#{p}10000").should == Float::INFINITY - end + it "interprets negative hex value" do + @object.send(:Float, "-0x10").should == -16.0 + end - it "returns 0 for '0x1#{p}-10000'" do - @object.send(:Float, "0x1#{p}-10000").should == 0 - end + it "accepts embedded _ if the number does not contain a-f" do + @object.send(:Float, "0x1_0").should == 16.0 + end - it "allows embedded _ in a number on either side of the #{p}" do - @object.send(:Float, "0x1_0#{p}10").should == 16384.0 - @object.send(:Float, "0x10#{p}1_0").should == 16384.0 - @object.send(:Float, "0x1_0#{p}1_0").should == 16384.0 + ruby_version_is ""..."3.4.3" do + it "does not accept embedded _ if the number contains a-f" do + -> { @object.send(:Float, "0x1_0a") }.should raise_error(ArgumentError) + @object.send(:Float, "0x1_0a", exception: false).should be_nil end + end - it "raises an exception if a space is embedded on either side of the '#{p}'" do - -> { @object.send(:Float, "0x1 0#{p}10") }.should raise_error(ArgumentError) - -> { @object.send(:Float, "0x10#{p}1 0") }.should raise_error(ArgumentError) + ruby_version_is "3.4.3" do + it "accepts embedded _ if the number contains a-f" do + @object.send(:Float, "0x1_0a").should == 0x10a.to_f end + end - it "raises an exception if there's a leading _ on either side of the '#{p}'" do - -> { @object.send(:Float, "0x_10#{p}10") }.should raise_error(ArgumentError) - -> { @object.send(:Float, "0x10#{p}_10") }.should raise_error(ArgumentError) - end + it "does not accept _ before, after or inside the 0x prefix" do + -> { @object.send(:Float, "_0x10") }.should raise_error(ArgumentError) + -> { @object.send(:Float, "0_x10") }.should raise_error(ArgumentError) + -> { @object.send(:Float, "0x_10") }.should raise_error(ArgumentError) + @object.send(:Float, "_0x10", exception: false).should be_nil + @object.send(:Float, "0_x10", exception: false).should be_nil + @object.send(:Float, "0x_10", exception: false).should be_nil + end - it "raises an exception if there's a trailing _ on either side of the '#{p}'" do - -> { @object.send(:Float, "0x10_#{p}10") }.should raise_error(ArgumentError) - -> { @object.send(:Float, "0x10#{p}10_") }.should raise_error(ArgumentError) - end + it "parses negative hexadecimal string as negative float" do + @object.send(:Float, "-0x7b").should == -123.0 + end - it "allows hexadecimal points on the left side of the '#{p}'" do - @object.send(:Float, "0x1.8#{p}0").should == 1.5 + ruby_version_is "3.4" do + it "accepts a fractional part" do + @object.send(:Float, "0x0.8").should == 0.5 end + end - it "raises an ArgumentError if there's a decimal point on the right side of the '#{p}'" do - -> { @object.send(:Float, "0x1#{p}1.0") }.should raise_error(ArgumentError) + describe "with binary exponent" do + %w(p P).each do |p| + it "interprets the fractional part (on the left side of '#{p}') in hexadecimal" do + @object.send(:Float, "0x10#{p}0").should == 16.0 + end + + it "interprets the exponent (on the right of '#{p}') in decimal" do + @object.send(:Float, "0x1#{p}10").should == 1024.0 + end + + it "raises an ArgumentError if #{p} is the trailing character" do + -> { @object.send(:Float, "0x1#{p}") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if #{p} is the leading character" do + -> { @object.send(:Float, "0x#{p}1") }.should raise_error(ArgumentError) + end + + it "returns Infinity for '0x1#{p}10000'" do + @object.send(:Float, "0x1#{p}10000").should == Float::INFINITY + end + + it "returns 0 for '0x1#{p}-10000'" do + @object.send(:Float, "0x1#{p}-10000").should == 0 + end + + it "allows embedded _ in a number on either side of the #{p}" do + @object.send(:Float, "0x1_0#{p}10").should == 16384.0 + @object.send(:Float, "0x10#{p}1_0").should == 16384.0 + @object.send(:Float, "0x1_0#{p}1_0").should == 16384.0 + end + + it "raises an exception if a space is embedded on either side of the '#{p}'" do + -> { @object.send(:Float, "0x1 0#{p}10") }.should raise_error(ArgumentError) + -> { @object.send(:Float, "0x10#{p}1 0") }.should raise_error(ArgumentError) + end + + it "raises an exception if there's a leading _ on either side of the '#{p}'" do + -> { @object.send(:Float, "0x_10#{p}10") }.should raise_error(ArgumentError) + -> { @object.send(:Float, "0x10#{p}_10") }.should raise_error(ArgumentError) + end + + it "raises an exception if there's a trailing _ on either side of the '#{p}'" do + -> { @object.send(:Float, "0x10_#{p}10") }.should raise_error(ArgumentError) + -> { @object.send(:Float, "0x10#{p}10_") }.should raise_error(ArgumentError) + end + + it "allows hexadecimal points on the left side of the '#{p}'" do + @object.send(:Float, "0x1.8#{p}0").should == 1.5 + end + + it "raises an ArgumentError if there's a decimal point on the right side of the '#{p}'" do + -> { @object.send(:Float, "0x1#{p}1.0") }.should raise_error(ArgumentError) + end end end end @@ -280,7 +348,7 @@ describe :kernel_float, shared: true do nan2.should equal(nan) end - it "returns the identical Infinity if to_f is called and it returns Infinity" do + it "returns the identical Infinity if #to_f is called and it returns Infinity" do infinity = infinity_value (infinity_to_f = mock('Infinity')).should_receive(:to_f).once.and_return(infinity) infinity2 = @object.send(:Float, infinity_to_f) |