1 files changed, 41 insertions, 0 deletions
diff --git a/llparse/test/transform-test.ts b/llparse/test/transform-test.ts
new file mode 100644
index 0000000..d30381e
--- /dev/null
+++ b/llparse/test/transform-test.ts
@@ -0,0 +1,41 @@
+import * as assert from 'assert';
+
+import { LLParse } from '../src/api';
+
+import { build, printMatch, printOff } from './fixtures';
+
+describe('llparse/transform', () => {
+  let p: LLParse;
+
+  beforeEach(() => {
+    p = new LLParse();
+  });
+
+  it('should apply transformation before the match', async () => {
+    const start = p.node('start');
+
+    start
+      .transform(p.transform.toLowerUnsafe())
+      .match('connect', printOff(p, start))
+      .match('close', printOff(p, start))
+      .otherwise(p.error(1, 'error'));
+
+    const binary = await build(p, start, 'transform-lower');
+    await binary.check('connectCLOSEcOnNeCt', 'off=7\noff=12\noff=19\n');
+  });
+
+  it('should apply safe `toLower()` transformation', async () => {
+    const start = p.node('start');
+
+    start
+      .transform(p.transform.toLower())
+      .select({
+        'a-b': 1,
+        'a\rb': 2,
+      }, printMatch(p, start))
+      .otherwise(p.error(1, 'error'));
+
+    const binary = await build(p, start, 'transform-safe-lower');
+    await binary.check('A-ba\rB', 'off=3 match=1\noff=6 match=2\n');
+  });
+});