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lexer_test.go
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/
lexer_test.go
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package gqlparser_test
import (
"testing"
"github.com/google/go-cmp/cmp"
"github.com/karupanerura/gqlparser"
)
func TestLexer(t *testing.T) {
t.Parallel()
tests := []struct {
name string
source string
want []gqlparser.Token
wantErr bool
}{
{"Empty", "", nil, false},
{"SingleKeyword", "SELECT", []gqlparser.Token{&gqlparser.KeywordToken{Name: "SELECT", RawContent: "SELECT"}}, false},
{"SingleKeywordCaseInsensitive", "sElEcT", []gqlparser.Token{&gqlparser.KeywordToken{Name: "SELECT", RawContent: "sElEcT"}}, false},
{
name: "EmptyBackQuoteString",
source: "``",
want: []gqlparser.Token{
&gqlparser.StringToken{Quote: '`', Content: "", RawContent: "``", Position: 0},
},
wantErr: false,
},
{
name: "BackQuoteString",
source: "`Kind`",
want: []gqlparser.Token{
&gqlparser.StringToken{Quote: '`', Content: "Kind", RawContent: "`Kind`", Position: 0},
},
wantErr: false,
},
{
name: "EscapedBackQuoteString",
source: "`Kind\\`Kind\\``",
want: []gqlparser.Token{
&gqlparser.StringToken{Quote: '`', Content: "Kind`Kind`", RawContent: "`Kind\\`Kind\\``", Position: 0},
},
wantErr: false,
},
{
name: "KeepBackQuoteString",
source: "`Kind\\\"Kind\\\"`",
want: []gqlparser.Token{
&gqlparser.StringToken{Quote: '`', Content: "Kind\"Kind\"", RawContent: "`Kind\\\"Kind\\\"`", Position: 0},
},
wantErr: false,
},
{
name: "EmptySingleQuoteString",
source: "''",
want: []gqlparser.Token{
&gqlparser.StringToken{Quote: '\'', Content: "", RawContent: "''", Position: 0},
},
wantErr: false,
},
{
name: "BackQuoteString",
source: "'String'",
want: []gqlparser.Token{
&gqlparser.StringToken{Quote: '\'', Content: "String", RawContent: "'String'", Position: 0},
},
wantErr: false,
},
{
name: "EscapedBackQuoteString",
source: "'String\\'Quoted\\''",
want: []gqlparser.Token{
&gqlparser.StringToken{Quote: '\'', Content: "String'Quoted'", RawContent: "'String\\'Quoted\\''", Position: 0},
},
wantErr: false,
},
{
name: "Integer",
source: "123",
want: []gqlparser.Token{
&gqlparser.NumericToken{Int64: 123, RawContent: "123", Position: 0},
},
wantErr: false,
},
{
name: "IntegerWithPlusSign",
source: "+123",
want: []gqlparser.Token{
&gqlparser.NumericToken{Int64: 123, RawContent: "+123", Position: 0},
},
wantErr: false,
},
{
name: "IntegerWithMinusSign",
source: "-123",
want: []gqlparser.Token{
&gqlparser.NumericToken{Int64: -123, RawContent: "-123", Position: 0},
},
wantErr: false,
},
{
name: "EqualsCondition",
source: "prop = 1",
want: []gqlparser.Token{
&gqlparser.SymbolToken{Content: "prop", Position: 0},
&gqlparser.WhitespaceToken{Content: " ", Position: 4},
&gqlparser.OperatorToken{Type: "=", Position: 5},
&gqlparser.WhitespaceToken{Content: " ", Position: 6},
&gqlparser.NumericToken{Int64: 1, RawContent: "1", Position: 7},
},
wantErr: false,
},
{
name: "LesserThanCondition",
source: "prop < 1",
want: []gqlparser.Token{
&gqlparser.SymbolToken{Content: "prop", Position: 0},
&gqlparser.WhitespaceToken{Content: " ", Position: 4},
&gqlparser.OperatorToken{Type: "<", Position: 5},
&gqlparser.WhitespaceToken{Content: " ", Position: 6},
&gqlparser.NumericToken{Int64: 1, RawContent: "1", Position: 7},
},
wantErr: false,
},
{
name: "GraterThanCondition",
source: "prop > 1",
want: []gqlparser.Token{
&gqlparser.SymbolToken{Content: "prop", Position: 0},
&gqlparser.WhitespaceToken{Content: " ", Position: 4},
&gqlparser.OperatorToken{Type: ">", Position: 5},
&gqlparser.WhitespaceToken{Content: " ", Position: 6},
&gqlparser.NumericToken{Int64: 1, RawContent: "1", Position: 7},
},
wantErr: false,
},
{
name: "LesserThanOrEqualsCondition",
source: "prop <= 1",
want: []gqlparser.Token{
&gqlparser.SymbolToken{Content: "prop", Position: 0},
&gqlparser.WhitespaceToken{Content: " ", Position: 4},
&gqlparser.OperatorToken{Type: "<=", Position: 5},
&gqlparser.WhitespaceToken{Content: " ", Position: 7},
&gqlparser.NumericToken{Int64: 1, RawContent: "1", Position: 8},
},
wantErr: false,
},
{
name: "InCondition",
source: "1 IN prop",
want: []gqlparser.Token{
&gqlparser.NumericToken{Int64: 1, RawContent: "1", Position: 0},
&gqlparser.WhitespaceToken{Content: " ", Position: 1},
&gqlparser.OperatorToken{Type: "IN", RawContent: "IN", Position: 2},
&gqlparser.WhitespaceToken{Content: " ", Position: 4},
&gqlparser.SymbolToken{Content: "prop", Position: 5},
},
wantErr: false,
},
{
name: "NotInCondition",
source: "1 NOT IN prop",
want: []gqlparser.Token{
&gqlparser.NumericToken{Int64: 1, RawContent: "1", Position: 0},
&gqlparser.WhitespaceToken{Content: " ", Position: 1},
&gqlparser.OperatorToken{Type: "NOT", RawContent: "NOT", Position: 2},
&gqlparser.WhitespaceToken{Content: " ", Position: 5},
&gqlparser.OperatorToken{Type: "IN", RawContent: "IN", Position: 6},
&gqlparser.WhitespaceToken{Content: " ", Position: 8},
&gqlparser.SymbolToken{Content: "prop", Position: 9},
},
wantErr: false,
},
{
name: "GraterThanOrEqualsCondition",
source: "prop >= 1",
want: []gqlparser.Token{
&gqlparser.SymbolToken{Content: "prop", Position: 0},
&gqlparser.WhitespaceToken{Content: " ", Position: 4},
&gqlparser.OperatorToken{Type: ">=", Position: 5},
&gqlparser.WhitespaceToken{Content: " ", Position: 7},
&gqlparser.NumericToken{Int64: 1, RawContent: "1", Position: 8},
},
wantErr: false,
},
{
name: "BasicQuery",
source: "SELECT * FROM Kind",
want: []gqlparser.Token{
&gqlparser.KeywordToken{Name: "SELECT", RawContent: "SELECT", Position: 0},
&gqlparser.WhitespaceToken{Content: " ", Position: 6},
&gqlparser.WildcardToken{Position: 7},
&gqlparser.WhitespaceToken{Content: " ", Position: 8},
&gqlparser.KeywordToken{Name: "FROM", RawContent: "FROM", Position: 9},
&gqlparser.WhitespaceToken{Content: " ", Position: 13},
&gqlparser.SymbolToken{Content: "Kind", Position: 14},
},
wantErr: false,
},
{
name: "ComplexQuery",
source: "SELECT a, b, c FROM Kind",
want: []gqlparser.Token{
&gqlparser.KeywordToken{Name: "SELECT", RawContent: "SELECT", Position: 0},
&gqlparser.WhitespaceToken{Content: " ", Position: 6},
&gqlparser.SymbolToken{Content: "a", Position: 7},
&gqlparser.OperatorToken{Type: ",", Position: 8},
&gqlparser.WhitespaceToken{Content: " ", Position: 9},
&gqlparser.SymbolToken{Content: "b", Position: 10},
&gqlparser.OperatorToken{Type: ",", Position: 11},
&gqlparser.WhitespaceToken{Content: " ", Position: 12},
&gqlparser.SymbolToken{Content: "c", Position: 13},
&gqlparser.WhitespaceToken{Content: " ", Position: 14},
&gqlparser.KeywordToken{Name: "FROM", RawContent: "FROM", Position: 15},
&gqlparser.WhitespaceToken{Content: " ", Position: 19},
&gqlparser.SymbolToken{Content: "Kind", Position: 20},
},
wantErr: false,
},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
lexer := gqlparser.NewLexer(tt.source)
got, err := gqlparser.ReadAllTokens(lexer)
if (err != nil) != tt.wantErr {
t.Errorf("Tokenize() error = %+v, wantErr %+v", err, tt.wantErr)
return
}
if df := cmp.Diff(tt.want, got); df != "" {
t.Errorf("Tokenize() = %+v, want %+v, diff = %s", got, tt.want, df)
}
})
}
}
func FuzzLexer(f *testing.F) {
f.Fuzz(func(t *testing.T, src string) {
lexer := gqlparser.NewLexer(src)
_, _ = gqlparser.ReadAllTokens(lexer)
// should be no panics
})
}