33 lines
977 B
Go
33 lines
977 B
Go
package geo
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestSegmentIntersections(t *testing.T) {
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// mid intersection
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s1 := NewSegment(NewPoint(0, 0), NewPoint(10, 10))
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s2 := NewSegment(NewPoint(0, 10), NewPoint(10, 0))
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intersections := s1.Intersections(*s2)
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assert.Equal(t, len(intersections), 1)
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assert.True(t, intersections[0].Equals(NewPoint(5, 5)))
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// intersection at the end
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s3 := NewSegment(NewPoint(10, 10), NewPoint(10, 0))
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intersections = s1.Intersections(*s3)
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assert.Equal(t, len(intersections), 1)
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assert.True(t, intersections[0].Equals(NewPoint(10, 10)))
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// intersection at the beginnig
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s4 := NewSegment(NewPoint(0, 0), NewPoint(0, 10))
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intersections = s1.Intersections(*s4)
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assert.Equal(t, len(intersections), 1)
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assert.True(t, intersections[0].Equals(NewPoint(0, 0)))
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// no intersection
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s5 := NewSegment(NewPoint(3, 8), NewPoint(2, 15))
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intersections = s1.Intersections(*s5)
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assert.Equal(t, len(intersections), 0)
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}
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