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package parser
import (
"testing"
"github.com/stretchr/testify/require"
"github.com/vektah/gqlparser/v2/ast"
"github.com/vektah/gqlparser/v2/lexer"
)
func TestParserUtils(t *testing.T) {
t.Run("test lookaround", func(t *testing.T) {
p := newParser("asdf 1.0 turtles")
require.Equal(t, "asdf", p.peek().Value)
tok, _ := p.expectKeyword("asdf")
require.Equal(t, "asdf", tok.Value)
require.Equal(t, "asdf", p.prev.Value)
require.NoError(t, p.err)
require.Equal(t, "1.0", p.peek().Value)
require.Equal(t, "1.0", p.peek().Value)
tok, _ = p.expect(lexer.Float)
require.Equal(t, "1.0", tok.Value)
require.Equal(t, "1.0", p.prev.Value)
require.NoError(t, p.err)
require.True(t, p.skip(lexer.Name))
require.NoError(t, p.err)
require.Equal(t, lexer.EOF, p.peek().Kind)
require.NoError(t, p.err)
})
t.Run("test many", func(t *testing.T) {
t.Run("can read array", func(t *testing.T) {
p := newParser("[a b c d]")
var arr []string
p.many(lexer.BracketL, lexer.BracketR, func() {
arr = append(arr, p.next().Value)
})
require.NoError(t, p.err)
require.Equal(t, []string{"a", "b", "c", "d"}, arr)
require.Equal(t, lexer.EOF, p.peek().Kind)
require.NoError(t, p.err)
})
t.Run("return if open is not found", func(t *testing.T) {
p := newParser("turtles are happy")
p.many(lexer.BracketL, lexer.BracketR, func() {
t.Error("cb should not be called")
})
require.NoError(t, p.err)
require.Equal(t, "turtles", p.next().Value)
})
t.Run("will stop on error", func(t *testing.T) {
p := newParser("[a b c d]")
var arr []string
p.many(lexer.BracketL, lexer.BracketR, func() {
arr = append(arr, p.next().Value)
if len(arr) == 2 {
p.error(p.peek(), "boom")
}
})
require.EqualError(t, p.err, "input.graphql:1:6: boom")
require.Equal(t, []string{"a", "b"}, arr)
})
})
t.Run("test some", func(t *testing.T) {
t.Run("can read array", func(t *testing.T) {
p := newParser("[a b c d]")
var arr []string
p.some(lexer.BracketL, lexer.BracketR, func() {
arr = append(arr, p.next().Value)
})
require.NoError(t, p.err)
require.Equal(t, []string{"a", "b", "c", "d"}, arr)
require.Equal(t, lexer.EOF, p.peek().Kind)
require.NoError(t, p.err)
})
t.Run("can't read empty array", func(t *testing.T) {
p := newParser("[]")
var arr []string
p.some(lexer.BracketL, lexer.BracketR, func() {
arr = append(arr, p.next().Value)
})
require.EqualError(t, p.err, "input.graphql:1:2: expected at least one definition, found ]")
require.Equal(t, []string(nil), arr)
require.NotEqual(t, lexer.EOF, p.peek().Kind)
})
t.Run("return if open is not found", func(t *testing.T) {
p := newParser("turtles are happy")
p.some(lexer.BracketL, lexer.BracketR, func() {
t.Error("cb should not be called")
})
require.NoError(t, p.err)
require.Equal(t, "turtles", p.next().Value)
})
t.Run("will stop on error", func(t *testing.T) {
p := newParser("[a b c d]")
var arr []string
p.some(lexer.BracketL, lexer.BracketR, func() {
arr = append(arr, p.next().Value)
if len(arr) == 2 {
p.error(p.peek(), "boom")
}
})
require.EqualError(t, p.err, "input.graphql:1:6: boom")
require.Equal(t, []string{"a", "b"}, arr)
})
})
t.Run("test errors", func(t *testing.T) {
p := newParser("foo bar")
p.next()
p.error(p.peek(), "test error")
p.error(p.peek(), "secondary error")
require.EqualError(t, p.err, "input.graphql:1:5: test error")
require.Equal(t, "foo", p.peek().Value)
require.Equal(t, "foo", p.next().Value)
require.Equal(t, "foo", p.peek().Value)
})
t.Run("unexpected error", func(t *testing.T) {
p := newParser("1 3")
p.unexpectedError()
require.EqualError(t, p.err, "input.graphql:1:1: Unexpected Int \"1\"")
})
t.Run("unexpected error", func(t *testing.T) {
p := newParser("1 3")
p.unexpectedToken(p.next())
require.EqualError(t, p.err, "input.graphql:1:1: Unexpected Int \"1\"")
})
t.Run("expect error", func(t *testing.T) {
p := newParser("foo bar")
p.expect(lexer.Float)
require.EqualError(t, p.err, "input.graphql:1:1: Expected Float, found Name")
})
t.Run("expectKeyword error", func(t *testing.T) {
p := newParser("foo bar")
p.expectKeyword("baz")
require.EqualError(t, p.err, "input.graphql:1:1: Expected \"baz\", found Name \"foo\"")
})
}
func newParser(input string) parser {
return parser{
lexer: lexer.New(&ast.Source{Input: input, Name: "input.graphql"}),
maxTokenLimit: 15000, // 15000 is the default value
}
}
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