Fix unset deploy parameters (#55)

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Check `--deploy-parameters` object is empty

Fix #54

---------

Co-authored-by: henrybell <henrybell@google.com>

Author: lukebarge

src/main.ts

@@ -147,7 +147,7 @@ export async function run(): Promise<void> {
     if (skaffoldFile) {
       cmd.push('--skaffold-file', skaffoldFile);
     }
-    if (deployParameters) {
+    if (deployParameters && Object.keys(deployParameters).length > 0) {
       cmd.push('--deploy-parameters', joinKVString(deployParameters));
     }
 

tests/unit/main.test.ts

@@ -362,6 +362,16 @@ test('#run', { concurrency: true }, async (suite) => {
     ]);
   });
 
+  await suite.test('does not set deploy parameters if not given', async (t) => {
+    const mocks = defaultMocks(t.mock);
+
+    await run();
+
+    const execArguments = mocks.getExecOutput.mock.calls?.at(0)?.arguments?.at(1);
+    assert(execArguments);
+    assert(!execArguments?.includes('--deploy-parameters'));
+  });
+
   await suite.test('sets flags if given', async (t) => {
     const mocks = defaultMocks(t.mock, {
       flags: '--flag1=value1 --flag2=value2',