Add a bunch of tests cases and harden the function aganst malformed w…

…orkflows

src/actions-util.test.ts

@@ -113,15 +113,15 @@ test("validateWorkflow() when on.push is valid", (t) => {
     on: ["push", "pull_request"],
   });
 
-  t.deepEqual(errors.length, 0);
+  t.deepEqual(errors, []);
 });
 
 test("validateWorkflow() when on.push is a valid superset", (t) => {
   const errors = actionsutil.validateWorkflow({
     on: ["push", "pull_request", "schedule"],
   });
 
-  t.deepEqual(errors.length, 0);
+  t.deepEqual(errors, []);
 });
 
 test("validateWorkflow() when on.push should not have a path", (t) => {
@@ -140,7 +140,7 @@ test("validateWorkflow() when on.push is a correct object", (t) => {
     on: { push: { branches: ["main"] }, pull_request: { branches: ["main"] } },
   });
 
-  t.deepEqual(errors.length, 0);
+  t.deepEqual(errors, []);
 });
 
 test("validateWorkflow() when on.pull_requests is a string", (t) => {
@@ -164,9 +164,7 @@ test("validateWorkflow() when on.push is correct with empty objects", (t) => {
     on: { push: undefined, pull_request: undefined },
   });
 
-  console.log(errors);
-
-  t.deepEqual(errors.length, 0);
+  t.deepEqual(errors, []);
 });
 
 test("validateWorkflow() when on.push is mismatched", (t) => {
@@ -188,7 +186,7 @@ test("validateWorkflow() when on.push is not mismatched", (t) => {
     },
   });
 
-  t.deepEqual(errors.length, 0);
+  t.deepEqual(errors, []);
 });
 
 test("validateWorkflow() when on.push is mismatched for pull_request", (t) => {
@@ -202,6 +200,93 @@ test("validateWorkflow() when on.push is mismatched for pull_request", (t) => {
   t.deepEqual(errors, [actionsutil.WorkflowErrors.MismatchedBranches]);
 });
 
+test("validateWorkflow() for a range of malformed workflows", (t) => {
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: {
+        push: 1,
+        pull_request: 1,
+      },
+    } as any),
+    []
+  );
+
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: 1,
+    } as any),
+    [actionsutil.WorkflowErrors.MissingHooks]
+  );
+
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: 1,
+      jobs: 1,
+    } as any),
+    [actionsutil.WorkflowErrors.MissingHooks]
+  );
+
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: 1,
+      jobs: [1],
+    } as any),
+    [actionsutil.WorkflowErrors.MissingHooks]
+  );
+
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: 1,
+      jobs: { 1: 1 },
+    } as any),
+    [actionsutil.WorkflowErrors.MissingHooks]
+  );
+
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: 1,
+      jobs: { test: 1 },
+    } as any),
+    [actionsutil.WorkflowErrors.MissingHooks]
+  );
+
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: 1,
+      jobs: { test: [1] },
+    } as any),
+    [actionsutil.WorkflowErrors.MissingHooks]
+  );
+
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: 1,
+      jobs: { test: { steps: 1 } },
+    } as any),
+    [actionsutil.WorkflowErrors.MissingHooks]
+  );
+
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: 1,
+      jobs: { test: { steps: [{ notrun: "git checkout HEAD^2" }] } },
+    } as any),
+    [actionsutil.WorkflowErrors.MissingHooks]
+  );
+
+  t.deepEqual(
+    actionsutil.validateWorkflow({
+      on: 1,
+      jobs: { test: [undefined] },
+    } as any),
+    [actionsutil.WorkflowErrors.MissingHooks]
+  );
+
+  t.deepEqual(actionsutil.validateWorkflow(1 as any), [
+    actionsutil.WorkflowErrors.MissingHooks,
+  ]);
+});
+
 test("validateWorkflow() when on.pull_request for every branch but push specifies branches", (t) => {
   const errors = actionsutil.validateWorkflow({
     on: {

src/actions-util.ts

@@ -209,14 +209,16 @@ export function validateWorkflow(doc: Workflow): CodedError[] {
 
   // .jobs[key].steps[].run
   for (const job of Object.values(doc?.jobs || {})) {
-    for (const step of job?.steps || []) {
-      // this was advice that we used to give in the README
-      // we actually want to run the analysis on the merge commit
-      // to produce results that are more inline with expectations
-      // (i.e: this is what will happen if you merge this PR)
-      // and avoid some race conditions
-      if (step?.run === "git checkout HEAD^2") {
-        errors.push(WorkflowErrors.CheckoutWrongHead);
+    if (Array.isArray(job?.steps)) {
+      for (const step of job?.steps) {
+        // this was advice that we used to give in the README
+        // we actually want to run the analysis on the merge commit
+        // to produce results that are more inline with expectations
+        // (i.e: this is what will happen if you merge this PR)
+        // and avoid some race conditions
+        if (step?.run === "git checkout HEAD^2") {
+          errors.push(WorkflowErrors.CheckoutWrongHead);
+        }
       }
     }
   }
@@ -284,6 +286,10 @@ export function validateWorkflow(doc: Workflow): CodedError[] {
         errors.push(WorkflowErrors.MismatchedBranches);
       }
     }
+  } else {
+    // on is not a known type
+    // this workflow is likely malformed
+    missing = MissingTriggers.Push | MissingTriggers.PullRequest;
   }
 
   switch (missing) {