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package main
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestEval(t *testing.T) {
assert := assert.New(t)
tests := []struct {
expression string
vars Vars
result string
}{
{ // no space
expression: "1+1",
vars: nil,
result: "2",
},
{
expression: "1 + 1",
vars: nil,
result: "2",
},
{
expression: "resptime - upstream_resptime",
vars: Vars{"resptime": "5", "upstream_resptime": "3"},
result: "2",
},
{
expression: "(resptime - upstream_resptime) * 1000",
vars: Vars{"resptime": "5", "upstream_resptime": "3"},
result: "2000",
},
}
for _, test := range tests {
expr, err := parseExpr(test.expression)
assert.Nil(err)
ctx := &ExprContext{
vars: test.vars,
}
v, err := evalExpr(expr, ctx)
assert.Nil(err)
assert.Equal(test.result, v.String())
}
}
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