Fix hasTestSpecs to ignore run-only config

When _quarto.tests contains only 'run' with no format specs,
hasTestSpecs() should return false to fall back to default
behavior (guess formats, use noErrorsOrWarnings).

This prevents tests with only run config from having no
verification at all.

Author: cderv

tests/smoke/smoke-all.test.ts

@@ -125,11 +125,16 @@ function skipTest(metadata: Record<string, any>): string | undefined {
 
 //deno-lint-ignore no-explicit-any
 function hasTestSpecs(metadata: any, input: string): boolean {
-  const hasTestSpecs = metadata?.["_quarto"]?.["tests"] != undefined
-  if (!hasTestSpecs && metadata?.["_quarto"]?.["test"] != undefined) {
+  const tests = metadata?.["_quarto"]?.["tests"];
+  if (!tests && metadata?.["_quarto"]?.["test"] != undefined) {
     throw new Error(`Test is ${input} is using 'test' in metadata instead of 'tests'. This is probably a typo.`);
   }
-  return hasTestSpecs
+  // Check if tests has any format specs (keys other than 'run')
+  if (tests && typeof tests === "object") {
+    const formatKeys = Object.keys(tests).filter(key => key !== "run");
+    return formatKeys.length > 0;
+  }
+  return false;
 }
 
 interface QuartoInlineTestSpec {