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test(math): add missing mod function tests and improve docs #474

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9 changes: 8 additions & 1 deletion docs/math.md
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,14 @@ Perform integer division with `div`

## mod

Modulo with `mod`
Perform modulo with `mod`. The result is the remainder of dividing the first
argument by the second.

```
mod 10 3
```

The above will return `1`, because `10 % 3 = 1`.

## mul

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22 changes: 22 additions & 0 deletions numeric_test.go
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Expand Up @@ -249,6 +249,28 @@ func TestDivf(t *testing.T) {
}
}

func TestMod(t *testing.T) {
tpl := `{{ mod 10 3 }}`
if err := runt(tpl, `1`); err != nil {
t.Error(err)
}

tpl = `{{ mod 10 2 }}`
if err := runt(tpl, `0`); err != nil {
t.Error(err)
}

tpl = `{{ mod 10 10 }}`
if err := runt(tpl, `0`); err != nil {
t.Error(err)
}

tpl = `{{ mod 7 3 }}`
if err := runt(tpl, `1`); err != nil {
t.Error(err)
}
}

func TestMul(t *testing.T) {
tpl := `{{ 1 | mul "2" 3 "4"}}`
if err := runt(tpl, `24`); err != nil {
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