feat: adds simple evaluator

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/eval.spec.ts b/tests/eval.spec.ts
new file mode 100644
index 0000000..63062e3
--- /dev/null
+++ b/tests/eval.spec.ts
@@ -0,0 +1,29 @@
+import { Dependencies, evalExpr } from '../src/eval'
+import { Expr } from '../src/parser'
+
+describe('eval', () => {
+  const deps: Dependencies = {
+    addClass: jest.fn(),
+    removeClass: jest.fn(),
+  }
+
+  it('should add classes', async () => {
+    await evalExpr(Expr.Call({
+      name: 'add-class',
+      args: [ Expr.Identifier('element-id'), Expr.LiteralString('class-name') ],
+    }), deps)
+
+    expect(deps.addClass).toHaveBeenCalledTimes(1)
+    expect(deps.addClass).toHaveBeenCalledWith('element-id', 'class-name')
+  })
+
+  it('should add classes', async () => {
+    await evalExpr(Expr.Call({
+      name: 'remove-class',
+      args: [ Expr.Identifier('element-id'), Expr.LiteralString('class-name') ],
+    }), deps)
+
+    expect(deps.removeClass).toHaveBeenCalledTimes(1)
+    expect(deps.removeClass).toHaveBeenCalledWith('element-id', 'class-name')
+  })
+})