23 lines
468 B
Go
23 lines
468 B
Go
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package math
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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 TestNchoseK100and2(t *testing.T) {
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nCk := NChoseK(100, 2)
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assert.Equal(t, uint64(4950), nCk, "100 chose 2 should equal 4950")
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}
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func TestNChoseKwereNlessK(t *testing.T) {
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nCk := NChoseK(1, 2)
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assert.Equal(t, uint64(0), nCk, "When n is less than k always 0")
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}
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func TestNChoseKWereKis0(t *testing.T) {
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nCk := NChoseK(50, 0)
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assert.Equal(t, uint64(1), nCk, "When K is 0 then 1")
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}
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