test: Add toToggleLineTo() custom matcher

Author: claremacrae

tests/CustomMatchers/CustomMatchersForTasks.ts

@@ -0,0 +1,36 @@
+import { diff } from 'jest-diff';
+import { fromLine } from '../TestHelpers';
+
+declare global {
+    namespace jest {
+        interface Matchers<R> {
+            toToggleLineTo(expectedLines: string[]): R;
+        }
+
+        interface Expect {
+            toToggleLineTo(expectedLines: string[]): any;
+        }
+
+        interface InverseAsymmetricMatchers {
+            toToggleLineTo(expectedLines: string[]): any;
+        }
+    }
+}
+
+export function toToggleLineTo(line: string, expectedLines: string[]) {
+    const task = fromLine({ line: line });
+    const receivedLines = task.toggle().map((t) => t.toFileLineString());
+
+    const matches = receivedLines.join('\n') === expectedLines.join('\n');
+    if (!matches) {
+        return {
+            message: () => 'unexpected incorrect new task lines:\n' + diff(expectedLines, receivedLines),
+            pass: false,
+        };
+    }
+
+    return {
+        message: () => `new task lines" should not be: "${receivedLines}"`,
+        pass: true,
+    };
+}

tests/CustomMatchers/jest.custom_matchers.setup.ts

@@ -36,6 +36,14 @@ expect.extend({
     toBeIdenticalTo,
 });
 
+// ---------------------------------------------------------------------
+// CustomMatchersForTasks
+// ---------------------------------------------------------------------
+import { toToggleLineTo } from './CustomMatchersForTasks';
+expect.extend({
+    toToggleLineTo,
+});
+
 // ---------------------------------------------------------------------
 // CustomMatchersForTaskBuilder
 // ---------------------------------------------------------------------