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# SPDX-FileCopyrightText: 2009 Cies Breijs
# SPDX-FileCopyrightText: 2009 Niels Slot
#
# SPDX-License-Identifier: GPL-2.0-or-later
require File.dirname(__FILE__) + '/spec_helper.rb'
$i = Interpreter.instance
describe "mathmatical operators" do
it "should work as expected with basic operations" do
$i.should_run_clean <<-EOS
assert 1 + 1 == 2
assert 1 - 1 == 0
assert 1 - 2 == -1
assert 1 - -2 == 3
assert -1 + 1 == 0
assert 2 * 2 == 4
assert -2 * 2 == -4
assert -2 * -2 == 4
assert 5 / 5 == 1
assert -5 / 5 == -1
assert 1 / 1 == 1
assert 0 / 1 == 0
assert -0 / 1 == 0
assert -0 / -1 == 0
assert 2 ^ 1 == 2
assert 2 ^ 2 == 4
assert -2 ^ 2 == 4
assert 2 ^ -2 == 0.25
assert 2 ^ 0 == 1
assert -3 ^ 3 == -27
assert (sqrt 1) == 1
assert (sqrt 0) == 0
assert (sqrt 4) == 2
assert ((sqrt 2) > 1.4) and ((sqrt 2) < 1.5)
assert (round 1.5) == 2
assert (round 1.4) == 1
assert (round -1.5) == -2
assert (round -1.4) == -1
EOS
end
it "should produce error when dividing by zero" do
$i.run('$x = 1 / 0').errors?.should be_true
end
it "should produce error when taking the sqrt of a negative number " do
$i.run('$x = sqrt -2').errors?.should be_true
end
it "should generate random number within the range" do
$i.should_run_clean <<-EOS
assert (random 0, 1) >= 0
assert (random 0, 1) >= 0
assert (random 0, 1) >= 0
assert (random 0, 1) >= 0
assert (random 0, 1) >= 0
assert (random 0, 1) >= 0
assert (random 1, 0) >= 0
assert (random 1, 0) >= 0
assert (random 1, 0) >= 0
assert (random 1, 0) >= 0
assert (random 1, 0) >= 0
assert (random 0, 1) <= 1
assert (random 0, 1) <= 1
assert (random 0, 1) <= 1
assert (random 0, 1) <= 1
assert (random 0, 1) <= 1
assert (random 0, 1) <= 1
assert (random 1, 0) <= 1
assert (random 1, 0) <= 1
assert (random 1, 0) <= 1
assert (random 1, 0) <= 1
assert (random 1, 0) <= 1
assert (random 0, -1) <= 0
assert (random 0, -1) <= 0
assert (random 0, -1) <= 0
assert (random 0, -1) <= 0
assert (random 0, -1) <= 0
assert (random -1, 0) <= 0
assert (random -1, 0) <= 0
assert (random -1, 0) <= 0
assert (random -1, 0) <= 0
assert (random -1, 0) <= 0
assert (random 0, -1) >= -1
assert (random 0, -1) >= -1
assert (random 0, -1) >= -1
assert (random 0, -1) >= -1
assert (random 0, -1) >= -1
assert (random 0, -1) >= -1
assert (random -1, 0) >= -1
assert (random -1, 0) >= -1
assert (random -1, 0) >= -1
assert (random -1, 0) >= -1
assert (random -1, 0) >= -1
EOS
end
it "should work as expected with trigonometrical functions" do
$i.should_run_clean <<-EOS
assert (sin -90) == -1
assert (sin 0) == 0
assert (sin 90) == 1
assert (sin 180) == 0
assert (sin 270) == -1
assert (sin 450) == 0
assert (cos -90) == 0
assert (cos 0) == -1
assert (cos 90) == 0
assert (cos 180) == 1
assert (cos 270) == 0
assert (cos 450) == -1
# assert (tan -90) # division by zero
assert (tan 0) == 0
# assert (tan 90) # division by zero
assert (tan 180) == 0
# assert (tan 270) # division by zero
assert (tan 450) == 0
EOS
$i.run('tan -90').errors?.should be_true
$i.run('tan 90 ').errors?.should be_true
$i.run('tan 270').errors?.should be_true
$i.should_run_clean <<-EOS
asset arcsin (arcsin -1) == -90
asset arcsin (arcsin -.5) == -30
asset arcsin (arcsin 0) == 0
asset arcsin (arcsin .5) == 30
asset arcsin (arcsin 1) == 90
asset arcsin (arccos -1) == 180
asset arcsin (arccos -.5) == 120
asset arcsin (arccos 0) == 90
asset arcsin (arccos .5) == 60
asset arcsin (arccos 1) == 0
asset arctan (arccos -1) == -45
asset arctan (arccos 0) == 0
asset arctan (arccos 1) == 45
asset arctan (arccos -100000000000) == -90
asset arctan (arccos 100000000000) == 90
EOS
$i.run('sin -1.1').errors?.should be_true
$i.run('sin 1.1').errors?.should be_true
$i.run('cos -1.1').errors?.should be_true
$i.run('cos 1.1').errors?.should be_true
end
it "should obey precedence rules"
it "should work with parentheses"
it "should work for floating point numbers"
it "should allow mixing of natural and floating point numbers"
end
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