1 files changed, 78 insertions, 0 deletions
diff --git a/internal/parse_test.go b/internal/parse_test.go
new file mode 100644
index 0000000..34977fb
--- /dev/null
+++ b/internal/parse_test.go
@@ -0,0 +1,78 @@
+// Copyright (C) 2023  Luke Shumaker <lukeshu@lukeshu.com>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package internal
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestParserHandleRune(t *testing.T) {
+	t.Parallel()
+	type testcase struct {
+		Input    string
+		ExpStack []string
+	}
+	testcases := map[string]testcase{
+		// Keep these test-cases in-sync with the examples in parse.go.
+		"object": {
+			Input: `{"x":"y","a":"b"}`,
+			ExpStack: []string{
+				// st,// processed
+				`?`,
+				`{`,  // {
+				`»"`, // {"
+				`»"`, // {"x
+				`»`,  // {"x"
+				`o?`, // {"x":
+				`o"`, // {"x":"
+				`o"`, // {"x":"y
+				`o`,  // {"x":"y"
+				`{`,  // {"x":"y",
+				`»"`, // {"x":"y","
+				`»"`, // {"x":"y","a
+				`»`,  // {"x":"y","a"
+				`o?`, // {"x":"y","a":
+				`o"`, // {"x":"y","a":"
+				`o"`, // {"x":"y","a":"b
+				`o`,  // {"x":"y","a":"b"
+				``,   // {"x":"y","a":"b"}
+			},
+		},
+		"array": {
+			Input: `["x","y"]`,
+			ExpStack: []string{
+				// st,// processed
+				`?`,
+				`[`,  // [
+				`a"`, // ["
+				`a"`, // ["x
+				`a`,  // ["x"
+				`a?`, // ["x",
+				`a"`, // ["x","
+				`a"`, // ["x","y
+				`a`,  // ["x","y"
+				``,   // ["x","y"]
+			},
+		},
+	}
+	for tcName, tc := range testcases {
+		tc := tc
+		t.Run(tcName, func(t *testing.T) {
+			t.Parallel()
+			var par Parser
+			if !assert.Equal(t, len(tc.Input)+1, len(tc.ExpStack)) {
+				return
+			}
+			for i, r := range tc.Input {
+				assert.Equal(t, tc.ExpStack[i], par.stackString())
+				_, err := par.HandleRune(r)
+				assert.NoError(t, err)
+				assert.Equal(t, tc.ExpStack[i+1], par.stackString())
+			}
+		})
+	}
+}