Truncate args when added to cache key

- Remove excess whitespace
- Truncate to 400 characters

__tests__/cache-utils.test.ts

@@ -0,0 +1,65 @@
+import * as cacheUtils from '../src/cache-utils'
+import * as path from 'path'
+
+describe('cacheUtils-utils', () => {
+    describe('can hash', () => {
+        it('a directory', async () => {
+            const hash = await cacheUtils.hashFiles(
+                path.resolve('__tests__/data/crypto-utils-test/gradle')
+            )
+            expect(hash).toBe(
+                process.platform === 'win32'
+                    ? '3364336e94e746ce65a31748a6371b7efd7d499e18ad605c74c91cde0edc0a44'
+                    : '63b9f14f65d014e585099c9c274b9dcbddf5cfd1a8978e5a24efb89ff9304348'
+            )
+        })
+        it('a directory with a glob', async () => {
+            const hash = await cacheUtils.hashFiles(
+                path.resolve('__tests__/data/crypto-utils-test/'),
+                ['gradle/**']
+            )
+            expect(hash).toBe(
+                process.platform === 'win32'
+                    ? '3364336e94e746ce65a31748a6371b7efd7d499e18ad605c74c91cde0edc0a44'
+                    : '63b9f14f65d014e585099c9c274b9dcbddf5cfd1a8978e5a24efb89ff9304348'
+            )
+        })
+        it('a directory with globs', async () => {
+            const hash = await cacheUtils.hashFiles(
+                path.resolve('__tests__/data/crypto-utils-test/'),
+                ['**/*.gradle', 'gradle/**']
+            )
+            expect(hash).toBe(
+                process.platform === 'win32'
+                    ? 'd9b66fded38f79f601ce745d64ed726a8df8c0b242b02bcd2c1d331f54742ad6'
+                    : 'f42cd10636f09799f4e01cc84e7ae906cc1d9140f1446f8dcd054d19cbc44c2b'
+            )
+        })
+    })
+    describe('can truncate args', () => {
+        test('handles zero-length string', () => {
+            expect(cacheUtils.truncateArgs('')).toBe('')
+        })
+        test('leaves short string untouched', () => {
+            expect(
+                cacheUtils.truncateArgs('short string that-should-be-untouched')
+            ).toBe('short string that-should-be-untouched')
+        })
+        test('truncates long string', () => {
+            const longString = 'a'.repeat(500)
+            expect(cacheUtils.truncateArgs(longString)).toBe('a'.repeat(400))
+        })
+        test('trims leading and trailing whitespace', () => {
+            expect(cacheUtils.truncateArgs('    this is an arg      ')).toBe(
+                'this is an arg'
+            )
+        })
+        test('removes repeated whitespace', () => {
+            expect(
+                cacheUtils.truncateArgs(
+                    '   this     one     has long   \t\n\t\r  spaces    '
+                )
+            ).toBe('this one has long spaces')
+        })
+    })
+})