mirror of
https://github.com/danog/liquid.git
synced 2024-11-30 08:39:01 +01:00
73 lines
2.3 KiB
Go
73 lines
2.3 KiB
Go
package expressions
|
|
|
|
import (
|
|
"fmt"
|
|
"testing"
|
|
|
|
"github.com/osteele/liquid/values"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
func TestContext_AddFilter(t *testing.T) {
|
|
cfg := NewConfig()
|
|
require.NotPanics(t, func() { cfg.AddFilter("f", func(int) int { return 0 }) })
|
|
require.NotPanics(t, func() { cfg.AddFilter("f", func(int) (a int, e error) { return }) })
|
|
require.Panics(t, func() { cfg.AddFilter("f", func() int { return 0 }) })
|
|
require.Panics(t, func() { cfg.AddFilter("f", func(int) {}) })
|
|
// require.Panics(t, func() { cfg.AddFilter("f", func(int) (a int, b int) { return }) })
|
|
require.Panics(t, func() { cfg.AddFilter("f", func(int) (a int, e error, b int) { return }) })
|
|
require.Panics(t, func() { cfg.AddFilter("f", 10) })
|
|
}
|
|
|
|
func TestContext_runFilter(t *testing.T) {
|
|
cfg := NewConfig()
|
|
constant := func(value interface{}) valueFn {
|
|
return func(Context) values.Value { return values.ValueOf(value) }
|
|
}
|
|
receiver := constant("self")
|
|
|
|
// basic
|
|
cfg.AddFilter("f1", func(s string) string {
|
|
return "<" + s + ">"
|
|
})
|
|
ctx := NewContext(map[string]interface{}{"x": 10}, cfg)
|
|
out, err := ctx.ApplyFilter("f1", receiver, []valueFn{})
|
|
require.NoError(t, err)
|
|
require.Equal(t, "<self>", out)
|
|
|
|
// filter argument
|
|
cfg.AddFilter("with_arg", func(a, b string) string {
|
|
return fmt.Sprintf("(%s, %s)", a, b)
|
|
})
|
|
ctx = NewContext(map[string]interface{}{"x": 10}, cfg)
|
|
out, err = ctx.ApplyFilter("with_arg", receiver, []valueFn{constant("arg")})
|
|
require.NoError(t, err)
|
|
require.Equal(t, "(self, arg)", out)
|
|
|
|
// TODO optional argument
|
|
// TODO error return
|
|
|
|
// extra argument
|
|
_, err = ctx.ApplyFilter("with_arg", receiver, []valueFn{constant(1), constant(2)})
|
|
require.Error(t, err)
|
|
require.Contains(t, err.Error(), "wrong number of arguments")
|
|
require.Contains(t, err.Error(), "given 2")
|
|
require.Contains(t, err.Error(), "expected 1")
|
|
|
|
// closure
|
|
cfg.AddFilter("add", func(a, b int) int {
|
|
return a + b
|
|
})
|
|
cfg.AddFilter("closure", func(a string, expr Closure) (string, error) {
|
|
value, e := expr.Bind("y", 1).Evaluate()
|
|
if e != nil {
|
|
return "", e
|
|
}
|
|
return fmt.Sprintf("(%v, %v)", a, value), nil
|
|
})
|
|
ctx = NewContext(map[string]interface{}{"x": 10}, cfg)
|
|
out, err = ctx.ApplyFilter("closure", receiver, []valueFn{constant("x |add: y")})
|
|
require.NoError(t, err)
|
|
require.Equal(t, "(self, 11)", out)
|
|
}
|