mirror of
https://github.com/SleepingInsomniac/pixelfaucet
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62 lines
1.2 KiB
Crystal
62 lines
1.2 KiB
Crystal
require "./spec_helper"
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require "../src/matrix"
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include PF
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describe Matrix do
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it "Creates a square matrix with bracket notation" do
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m = Matrix[
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0, 1,
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1, 0,
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]
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m.class.should eq(Matrix(Int32, 2, 2))
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m[1, 0].should eq(1)
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m[0, 1].should eq(1)
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end
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describe "#*" do
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it "returns the same matrix when multiplied by identity" do
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mat = Matrix[
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1.0, 2.0, 3.0, 4.0,
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1.0, 2.0, 3.0, 4.0,
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1.0, 2.0, 3.0, 4.0,
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1.0, 2.0, 3.0, 4.0,
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]
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mat.class.should eq(Matrix(Float64, 4, 4))
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ident = Matrix[
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1.0, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 0.0,
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0.0, 0.0, 1.0, 0.0,
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0.0, 0.0, 0.0, 1.0,
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]
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result = mat * ident
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result.should eq(mat)
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end
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end
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describe "#size" do
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it "returns the size of the matrix" do
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mat = Matrix[
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1, 2,
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3, 4,
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]
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mat.size.should eq(2)
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end
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it "raises an exception if called on a non-square matrix" do
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mat = Matrix(Int32, 2, 4).new(Slice[
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1, 2,
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3, 4,
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5, 6,
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7, 8,
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])
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expect_raises(Exception, "Matrix(2x4) is not square") { mat.size }
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end
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end
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end
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