Initial commit

1 files changed, 107 insertions, 0 deletions

diff --git a/parser_test.go b/parser_test.go
new file mode 100644
index 0000000..7c22a76
--- /dev/null
+++ b/parser_test.go
@@ -0,0 +1,107 @@
+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, NewToken(0, "ff"), node)
+	})
+
+	t.Run("parsers", func(t *testing.T) {
+		node, _ := Parsify(CharRun("f"))(p)
+		require.Equal(t, NewToken(0, "ff"), node)
+	})
+
+	t.Run("*parsers", func(t *testing.T) {
+		var parser Parser
+		parserfied := Parsify(&parser)
+		parser = CharRun("f")
+
+		node, _ := parserfied(p)
+		require.Equal(t, NewToken(0, "ff"), node)
+	})
+}
+
+func TestExact(t *testing.T) {
+	p := Pointer{"fooo", 0}
+
+	t.Run("success", func(t *testing.T) {
+		node, p2 := Exact("fo")(p)
+		require.Equal(t, NewToken(0, "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, NewToken(0, "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, NewToken(0, "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, NewToken(0, "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) {
+	require.Equal(t, "abcdefg", Range("a-g"))
+	require.Equal(t, "01234abcd", Range("0-4a-d"))
+}