test: ignore 'still running' heartbeat in stdout assertions

The 10s long-running silent timeout fires on slow CI runners and gets
captured by stdout filters that match '<job> >' prefixes, breaking
equality assertions. Exclude heartbeat lines so the tests only assert
on real job output.

Author: firecow

tests/test-cases/predefined-variables/integration.test.ts

@@ -141,7 +141,7 @@ describe("predefined-variables", () => {
             expected += `test-job > ${key}=${envVars[key]}\n`;
         });
 
-        const filteredStdout = writeStreams.stdoutLines.filter(f => f.startsWith("test-job > ")).join("\n");
+        const filteredStdout = writeStreams.stdoutLines.filter(f => f.startsWith("test-job > ") && !f.endsWith("> still running...")).join("\n");
         expect(filteredStdout).toEqual(expected.trim());
         expect(jobIdSpy).toHaveBeenCalledTimes(2);
     });
@@ -178,7 +178,7 @@ CI_SERVER_SHELL_SSH_PORT: 8022
         Object.keys(envVars).forEach(key => {
             expected += `test-job > ${key}=${envVars[key]}\n`;
         });
-        const filteredStdout = writeStreams.stdoutLines.filter(f => f.startsWith("test-job > ")).join("\n");
+        const filteredStdout = writeStreams.stdoutLines.filter(f => f.startsWith("test-job > ") && !f.endsWith("> still running...")).join("\n");
         expect(filteredStdout).toEqual(expected.trim());
         expect(jobIdSpy).toHaveBeenCalledTimes(2);
     });
@@ -218,7 +218,7 @@ CI_SERVER_SHELL_SSH_PORT: 8022
             expected += `test-job > ${key}=${envVars[key]}\n`;
         });
 
-        const filteredStdout = writeStreams.stdoutLines.filter(f => f.startsWith("test-job > ")).join("\n");
+        const filteredStdout = writeStreams.stdoutLines.filter(f => f.startsWith("test-job > ") && !f.endsWith("> still running...")).join("\n");
         expect(filteredStdout).toEqual(expected.trim());
         expect(jobIdSpy).toHaveBeenCalledTimes(2);
     });

tests/test-cases/services/integration.test.ts

@@ -189,7 +189,7 @@ test.concurrent("services <services:entrypoint should support variable expansion
         stateDir: ".gitlab-ci-local-entrypoint",
     }, writeStreams);
 
-    const filteredStdout = writeStreams.stdoutLines.filter(f => f.startsWith("job1 >")).join("\n");
+    const filteredStdout = writeStreams.stdoutLines.filter(f => f.startsWith("job1 >") && !f.endsWith("> still running...")).join("\n");
     expect(filteredStdout).toEqual(`
 job1 > should support single quote       [']
 job1 > should support double quote       ["]