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// Copyright (c) 2020 Alexander Kiryukhin <a.kiryukhin@mail.ru>
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package executor
import "testing"
func TestCalc(t *testing.T) {
funcs := []*Function{
NewFunction("negative", func(args ...float64) (f float64, err error) {
return -args[0], nil
}, 1),
NewFunction("sum", func(args ...float64) (f float64, err error) {
return args[0] + args[1], nil
}, 2),
}
operators := []*Operator{
NewOperator("==", 1, LeftAssoc, func(a, b float64) (float64, error) {
if a == b {
return 1, nil
}
return 0, nil
}),
}
tests := []struct {
name string
expression string
expected float64
vars map[string]float64
funcs []*Function
operators []*Operator
}{
{"simple", "((15/(7-(1+1)))*-3)-(-2+(1+1))", ((15.0 / (7.0 - (1.0 + 1.0))) * -3.0) - (-2.0 + (1.0 + 1.0)), nil, nil, nil},
{"variables", "a+b*c", 14.0, map[string]float64{"a": 2.0, "b": 3.0, "c": 4.0}, nil, nil},
{"functions 1 arg", "negative(10)", -10.0, nil, funcs, nil},
{"functions 2 arg", "negative(sum(10, 20)+20)", -50.0, nil, funcs, nil},
{"custom operator", "10 == 10", 1, nil, nil, operators},
{"custom operator 2", "10 == 12", 0, nil, nil, operators},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
c := NewCalc()
c.AddOperators(MathOperators)
if test.funcs != nil {
c.AddFunctions(test.funcs)
}
if test.operators != nil {
c.AddOperators(test.operators)
}
if err := c.Prepare(test.expression); err != nil {
t.Error(err)
}
actual, err := c.Execute(test.vars)
if err != nil {
t.Error(err)
}
if actual != test.expected {
t.Errorf("Expected %f, actual %f", test.expected, actual)
}
})
}
}
func TestCalc2(t *testing.T) {
c := NewCalc()
c.AddOperators(MathOperators)
if err := c.Prepare("((15/(7-(1+1)))*-3)-(-2+(1+1))"); err != nil {
t.Error(err)
}
actual, err := c.Execute(nil)
if err != nil {
t.Error(err)
}
expected := ((15.0 / (7.0 - (1.0 + 1.0))) * -3.0) - (-2.0 + (1.0 + 1.0))
if actual != expected {
t.Errorf("Expected %f, actual %f", expected, actual)
}
}
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