Add unit test for the behaviour

Author: ross-p-smith

src/test/utils.test.ts

@@ -0,0 +1,29 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as assert from 'assert';
+
+import { isBuildxCacheToInline } from '../spec-node/utils';
+
+describe('Utils', function () {
+	describe('isBuildxCacheToInline', function () {
+		it('returns false for undefined or empty', () => {
+			assert.strictEqual(isBuildxCacheToInline(undefined), false);
+			assert.strictEqual(isBuildxCacheToInline(''), false);
+		});
+
+		it('returns true for inline cache type', () => {
+			assert.strictEqual(isBuildxCacheToInline('type=inline'), true);
+			assert.strictEqual(isBuildxCacheToInline('type = inline'), true);
+			assert.strictEqual(isBuildxCacheToInline('type=INLINE'), true);
+			assert.strictEqual(isBuildxCacheToInline('mode=max,type=inline,compression=zstd'), true);
+		});
+
+		it('returns false for non-inline cache type', () => {
+			assert.strictEqual(isBuildxCacheToInline('type=registry'), false);
+			assert.strictEqual(isBuildxCacheToInline('type=local'), false);
+			assert.strictEqual(isBuildxCacheToInline('inline'), false);
+		});
+	});
+});