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op_test.go
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// Copyright (c) 2017 Opsidian Ltd.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package terminal_test
import (
. "github.com/onsi/ginkgo"
. "github.com/onsi/ginkgo/extensions/table"
. "github.com/onsi/gomega"
"github.com/conflowio/parsley/data"
"github.com/conflowio/parsley/parsley"
"github.com/conflowio/parsley/text"
"github.com/conflowio/parsley/text/terminal"
)
var _ = Describe("Op", func() {
var p = terminal.Op("===")
Context("when called with an empty string", func() {
It("should panic", func() {
Expect(func() { terminal.Op("") }).To(Panic())
})
})
DescribeTable("should match",
func(input string, startPos int, nodePos parsley.Pos, endPos int) {
f := text.NewFile("textfile", []byte(input))
fs := parsley.NewFileSet(f)
r := text.NewReader(f)
ctx := parsley.NewContext(fs, r)
res, curtailingParsers, err := p.Parse(ctx, data.EmptyIntMap, f.Pos(startPos))
Expect(curtailingParsers).To(Equal(data.EmptyIntSet))
Expect(err).ToNot(HaveOccurred())
Expect(res.Token()).To(Equal("==="))
Expect(res.(parsley.LiteralNode).Value()).To(Equal("==="))
Expect(res.Pos()).To(Equal(nodePos))
Expect(res.ReaderPos()).To(Equal(f.Pos(endPos)))
},
Entry(`op beginning`, `===aaa`, 0, parsley.Pos(1), 3),
Entry(`op middle`, `aaa===aaa`, 3, parsley.Pos(4), 6),
Entry(`op end`, `aaa===`, 3, parsley.Pos(4), 6),
)
DescribeTable("should not match",
func(input string, startPos int) {
f := text.NewFile("textfile", []byte(input))
fs := parsley.NewFileSet(f)
r := text.NewReader(f)
ctx := parsley.NewContext(fs, r)
res, curtailingParsers, err := p.Parse(ctx, data.EmptyIntMap, f.Pos(startPos))
Expect(curtailingParsers).To(Equal(data.EmptyIntSet))
Expect(err).To(HaveOccurred())
Expect(err.Cause()).To(MatchError("was expecting \"===\""))
Expect(err.Pos()).To(Equal(f.Pos(startPos)))
Expect(res).To(BeNil())
},
Entry("empty", ``, 0),
Entry("partial", `==`, 0),
)
})