1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
require_relative '../../spec_helper'
ruby_version_is ""..."3.1" do
require_relative 'fixtures/classes'
require 'matrix'
describe "Matrix#empty?" do
it "returns true when the Matrix is empty" do
Matrix[ ].empty?.should be_true
Matrix[ [], [], [] ].empty?.should be_true
Matrix[ [], [], [] ].transpose.empty?.should be_true
end
it "returns false when the Matrix has elements" do
Matrix[ [1, 2] ].empty?.should be_false
Matrix[ [1], [2] ].empty?.should be_false
end
it "doesn't accept any parameter" do
->{
Matrix[ [1, 2] ].empty?(42)
}.should raise_error(ArgumentError)
end
end
describe "Matrix.empty" do
it "returns an empty matrix of the requested size" do
m = Matrix.empty(3, 0)
m.row_size.should == 3
m.column_size.should == 0
m = Matrix.empty(0, 3)
m.row_size.should == 0
m.column_size.should == 3
end
it "has arguments defaulting to 0" do
Matrix.empty.should == Matrix.empty(0, 0)
Matrix.empty(42).should == Matrix.empty(42, 0)
end
it "does not accept more than two parameters" do
->{
Matrix.empty(1, 2, 3)
}.should raise_error(ArgumentError)
end
it "raises an error if both dimensions are > 0" do
->{
Matrix.empty(1, 2)
}.should raise_error(ArgumentError)
end
it "raises an error if any dimension is < 0" do
->{
Matrix.empty(-2, 0)
}.should raise_error(ArgumentError)
->{
Matrix.empty(0, -2)
}.should raise_error(ArgumentError)
end
end
describe "for a subclass of Matrix" do
it "returns an instance of that subclass" do
MatrixSub.empty(0, 1).should be_an_instance_of(MatrixSub)
end
end
end
|
