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package parsec
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestParsify(t *testing.T) {
p := Pointer{"ffooo", 0}
t.Run("strings", func(t *testing.T) {
node, _ := Parsify("ff")(p)
require.Equal(t, "ff", node)
})
t.Run("parsers", func(t *testing.T) {
node, _ := Parsify(CharRun("f"))(p)
require.Equal(t, "ff", node)
})
t.Run("parser funcs", func(t *testing.T) {
node, _ := Parsify(func(p Pointer) (Node, Pointer) {
return "hello", p
})(p)
require.Equal(t, "hello", node)
})
t.Run("*parsers", func(t *testing.T) {
var parser Parser
parserfied := Parsify(&parser)
parser = CharRun("f")
node, _ := parserfied(p)
require.Equal(t, "ff", node)
})
require.Panics(t, func() {
Parsify(1)
})
}
func TestParsifyAll(t *testing.T) {
parsers := ParsifyAll("ff", "gg")
result, _ := parsers[0](Pointer{"ffooo", 0})
require.Equal(t, "ff", result)
result, _ = parsers[1](Pointer{"ffooo", 0})
require.Equal(t, NewError(0, "Expected gg"), result)
}
func TestExact(t *testing.T) {
p := Pointer{"fooo", 0}
t.Run("success", func(t *testing.T) {
node, p2 := Exact("fo")(p)
require.Equal(t, "fo", node)
require.Equal(t, p.Advance(2), p2)
})
t.Run("error", func(t *testing.T) {
node, p2 := Exact("bar")(p)
require.Equal(t, NewError(0, "Expected bar"), node)
require.Equal(t, 0, p2.pos)
})
}
func TestChar(t *testing.T) {
p := Pointer{"foobar", 0}
t.Run("success", func(t *testing.T) {
node, p2 := Char("fo")(p)
require.Equal(t, "f", node)
require.Equal(t, p.Advance(1), p2)
})
t.Run("error", func(t *testing.T) {
node, p2 := Char("bar")(p)
require.Equal(t, NewError(0, "Expected one of bar"), node)
require.Equal(t, 0, p2.pos)
})
}
func TestCharRun(t *testing.T) {
p := Pointer{"foobar", 0}
t.Run("success", func(t *testing.T) {
node, p2 := CharRun("fo")(p)
require.Equal(t, "foo", node)
require.Equal(t, p.Advance(3), p2)
})
t.Run("error", func(t *testing.T) {
node, p2 := CharRun("bar")(p)
require.Equal(t, NewError(0, "Expected some of bar"), node)
require.Equal(t, 0, p2.pos)
})
}
func TestCharUntil(t *testing.T) {
p := Pointer{"foobar", 0}
t.Run("success", func(t *testing.T) {
node, p2 := CharRunUntil("z")(p)
require.Equal(t, "foobar", node)
require.Equal(t, p.Advance(6), p2)
})
t.Run("error", func(t *testing.T) {
node, p2 := CharRunUntil("f")(p)
require.Equal(t, NewError(0, "Expected some of f"), node)
require.Equal(t, 0, p2.pos)
})
}
func TestWS(t *testing.T) {
p := Pointer{" fooo", 0}
node, p2 := WS(p)
require.Equal(t, nil, node)
require.Equal(t, p.Advance(2), p2)
}
func TestRange(t *testing.T) {
t.Run("full match", func(t *testing.T) {
node, p := Range("a-z")(Pointer{"foobar", 0})
require.Equal(t, "foobar", node)
require.Equal(t, "", p.Get())
})
t.Run("partial match", func(t *testing.T) {
node, p := Range("1-4d-a")(Pointer{"a1b2c3d4efg", 0})
require.Equal(t, "a1b2c3d4", node)
require.Equal(t, "efg", p.Get())
})
t.Run("limited match", func(t *testing.T) {
node, p := Range("1-4d-a", 1, 2)(Pointer{"a1b2c3d4efg", 0})
require.Equal(t, "a1", node)
require.Equal(t, "b2c3d4efg", p.Get())
})
t.Run("no match", func(t *testing.T) {
node, p := Range("0-9")(Pointer{"ffffff", 0})
require.Equal(t, NewError(0, "Expected at least 1 more of 0-9"), node)
require.Equal(t, 0, p.pos)
})
t.Run("no match with min", func(t *testing.T) {
node, p := Range("0-9", 4)(Pointer{"ffffff", 0})
require.Equal(t, NewError(0, "Expected at least 4 more of 0-9"), node)
require.Equal(t, 0, p.pos)
})
require.Panics(t, func() {
Range("abcd")
})
require.Panics(t, func() {
Range("a-b", 1, 2, 3)
})
}
func TestParseString(t *testing.T) {
t.Run("partial match", func(t *testing.T) {
result, remaining, err := ParseString("hello", "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("world", "hello world")
require.Equal(t, nil, result)
require.Equal(t, "hello world", remaining)
require.Error(t, err)
require.Equal(t, "offset 0: Expected world", err.Error())
})
}
func TestString(t *testing.T) {
t.Run("test basic match", func(t *testing.T) {
result, p := String('"')(Pointer{`"hello"`, 0})
require.Equal(t, `hello`, result)
require.Equal(t, "", p.Get())
})
t.Run("test non match", func(t *testing.T) {
result, p := String('"')(Pointer{`1`, 0})
require.Equal(t, NewError(0, `Expected "`), result)
require.Equal(t, `1`, p.Get())
})
t.Run("test unterminated string", func(t *testing.T) {
result, p := String('"')(Pointer{`"hello `, 0})
require.Equal(t, NewError(0, `Unterminated string`), result)
require.Equal(t, `"hello `, p.Get())
})
t.Run("test escaping", func(t *testing.T) {
result, p := String('"')(Pointer{`"hello \"world\""`, 0})
require.Equal(t, `hello "world"`, result)
require.Equal(t, ``, p.Get())
})
}
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