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package goparsify
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestParsify(t *testing.T) {
t.Run("strings", func(t *testing.T) {
require.Equal(t, "ff", Parsify("ff")(InputString("ffooo")).Token)
})
t.Run("parsers", func(t *testing.T) {
require.Equal(t, "ff", Parsify(Chars("f"))(InputString("ffooo")).Token)
})
t.Run("parser funcs", func(t *testing.T) {
node := Parsify(func(p *State) Node {
return Node{Token: "hello"}
})(InputString("ffooo"))
require.Equal(t, "hello", node.Token)
})
t.Run("*parsers", func(t *testing.T) {
var parser Parser
parserfied := Parsify(&parser)
parser = Chars("f")
node := parserfied(InputString("ffooo"))
require.Equal(t, "ff", node.Token)
})
require.Panics(t, func() {
Parsify(1)
})
}
func TestParsifyAll(t *testing.T) {
parsers := ParsifyAll("ff", "gg")
result := parsers[0](InputString("ffooo"))
require.Equal(t, "ff", result.Token)
result = parsers[1](InputString("ffooo"))
require.Equal(t, "", result.Token)
}
func TestExact(t *testing.T) {
t.Run("success string", func(t *testing.T) {
node, ps := runParser("foobar", Exact("fo"))
require.Equal(t, "fo", node.Token)
require.Equal(t, "obar", ps.Get())
})
t.Run("success char", func(t *testing.T) {
node, ps := runParser("foobar", Exact("f"))
require.Equal(t, "f", node.Token)
require.Equal(t, "oobar", ps.Get())
})
t.Run("error", func(t *testing.T) {
_, ps := runParser("foobar", Exact("bar"))
require.Equal(t, "bar", ps.Error.Expected)
require.Equal(t, 0, ps.Pos)
})
t.Run("error char", func(t *testing.T) {
_, ps := runParser("foobar", Exact("o"))
require.Equal(t, "o", ps.Error.Expected)
require.Equal(t, 0, ps.Pos)
})
t.Run("eof char", func(t *testing.T) {
_, ps := runParser("", Exact("o"))
require.Equal(t, "o", ps.Error.Expected)
require.Equal(t, 0, ps.Pos)
})
}
func TestChars(t *testing.T) {
t.Run("full match", func(t *testing.T) {
node, ps := runParser("foobar", Chars("a-z"))
require.Equal(t, "foobar", node.Token)
require.Equal(t, "", ps.Get())
require.False(t, ps.Errored())
})
t.Run("partial match", func(t *testing.T) {
node, ps := runParser("a1b2c3d4efg", Chars("1-4d-a"))
require.Equal(t, "a1b2c3d4", node.Token)
require.Equal(t, "efg", ps.Get())
require.False(t, ps.Errored())
})
t.Run("limited match", func(t *testing.T) {
node, ps := runParser("a1b2c3d4efg", Chars("1-4d-a", 1, 2))
require.Equal(t, "a1", node.Token)
require.Equal(t, "b2c3d4efg", ps.Get())
require.False(t, ps.Errored())
})
t.Run("no match", func(t *testing.T) {
_, ps := runParser("ffffff", Chars("0-9"))
require.Equal(t, "offset 0: Expected 0-9", ps.Error.Error())
require.Equal(t, 0, ps.Pos)
})
t.Run("no match with min", func(t *testing.T) {
_, ps := runParser("ffffff", Chars("0-9", 4))
require.Equal(t, "0-9", ps.Error.Expected)
require.Equal(t, 0, ps.Pos)
})
t.Run("test exact matches", func(t *testing.T) {
node, ps := runParser("aaff", Chars("abcd"))
require.Equal(t, "aa", node.Token)
require.Equal(t, 2, ps.Pos)
require.False(t, ps.Errored())
})
t.Run("test not matches", func(t *testing.T) {
node, ps := runParser("aaff", NotChars("ff"))
require.Equal(t, "aa", node.Token)
require.Equal(t, 2, ps.Pos)
require.False(t, ps.Errored())
})
require.Panics(t, func() {
Chars("a-b", 1, 2, 3)
})
}
func TestParseString(t *testing.T) {
Y := Map("hello", func(n Node) Node { return Node{Result: n.Token} })
t.Run("partial match", func(t *testing.T) {
result, remaining, err := ParseString(Y, "hello world")
require.Equal(t, "hello", result)
require.Equal(t, "world", remaining)
require.NoError(t, err)
})
t.Run("error", func(t *testing.T) {
result, remaining, err := ParseString(Y, "world")
require.Nil(t, result)
require.Equal(t, "world", remaining)
require.Error(t, err)
require.Equal(t, "offset 0: Expected hello", err.Error())
})
}
func runParser(input string, parser Parser) (Node, *State) {
ps := InputString(input)
result := parser(ps)
return result, ps
}
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