Test: API error contract regression and boundary validation (#714)#753
Test: API error contract regression and boundary validation (#714)#753Chris0Jeky merged 10 commits intomainfrom
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Validates GP-03 compliance for board endpoints: empty name, whitespace name, name exceeding 100 chars, boundary at exactly 100 chars, non- existent board ID for get/update/delete, special characters in name, and empty name update.
Validates GP-03 compliance for card endpoints: empty/whitespace title, title exceeding 200 chars, non-existent board and column IDs, move to non-existent card/column, delete/update non-existent card.
Validates GP-03 compliance for column endpoints: empty/whitespace name, name exceeding 50 chars, boundary at exactly 50 chars, invalid and negative WIP limits, non-existent column for update/delete, reorder with non-existent column IDs, and non-existent board.
Validates GP-03 compliance for capture endpoints: empty/whitespace text, no board context (valid), non-existent ID for get/ignore/cancel/triage, and invalid status query parameter.
Validates GP-03 compliance for automation proposal endpoints: non- existent ID for get/approve/reject/execute/diff, missing idempotency key for execute, and empty IDs list for dismiss.
Validates GP-03 compliance for label endpoints: non-existent board, empty name, non-existent label ID for update/delete.
Validates error responses for malformed JSON, empty body, wrong content- type, null JSON body, JSON array instead of object, and non-existent routes returning JSON (not HTML).
Add missing IUserContext parameter to AuthController constructor calls after the constructor signature was updated to require it.
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Adversarial Self-ReviewStrengths
Potential Issues Found
VerdictNo blocking issues found. The tests are meaningful, well-structured, and deterministic. |
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Code Review
This pull request introduces a comprehensive suite of regression tests to verify GP-03 error contract compliance across various API endpoints, including boards, captures, cards, columns, labels, and proposals. It also updates existing AuthController tests to accommodate a new IUserContext dependency. The review feedback focuses on improving the precision and determinism of these new tests, specifically by recommending the assertion of specific error codes for 404 responses and the removal of non-deterministic status code checks in reorder and idempotency scenarios.
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| var response = await client.GetAsync($"/api/capture/items/{Guid.NewGuid()}"); | ||
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| await ApiTestHarness.AssertErrorContractAsync(response, HttpStatusCode.NotFound); |
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To ensure full compliance with the GP-03 error contract and maintain consistency with other test files in this PR (such as BoardErrorContractTests.cs), it is recommended to verify the specific errorCode for 404 responses. This makes the regression tests more precise.
await ApiTestHarness.AssertErrorContractAsync(response, HttpStatusCode.NotFound, ErrorCodes.NotFound);| $"/api/boards/{board.Id}/cards", | ||
| new CreateCardDto(board.Id, Guid.NewGuid(), "Card In Missing Column", null, null, null)); | ||
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| await ApiTestHarness.AssertErrorContractAsync(response, HttpStatusCode.NotFound); |
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Consistency in error contract validation is key for these regression tests. Similar to BoardErrorContractTests.cs, it is recommended to verify that the errorCode is specifically ErrorCodes.NotFound when a resource is not found.
await ApiTestHarness.AssertErrorContractAsync(response, HttpStatusCode.NotFound, ErrorCodes.NotFound);| response.StatusCode.Should().BeOneOf(HttpStatusCode.BadRequest, HttpStatusCode.NotFound); | ||
| await ApiTestHarness.AssertErrorContractAsync(response, response.StatusCode); |
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This assertion is non-deterministic. For a robust error contract regression test, the expected status code should be fixed. If the intent is to test reordering with a non-existent ID, it should consistently return 404 Not Found (or 400 if validation fails early). Allowing both reduces the effectiveness of the test in catching breaking changes in the error handling flow.
| response.StatusCode.Should().BeOneOf( | ||
| HttpStatusCode.BadRequest, | ||
| HttpStatusCode.NotFound); | ||
| await ApiTestHarness.AssertErrorContractAsync(response, response.StatusCode); |
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This assertion is non-deterministic as it accepts both 400 and 404. For a high-quality regression test suite, it is better to ensure the specific error path is exercised. If testing for a missing idempotency key, using a valid resource ID would guarantee a 400 Bad Request response from the validation logic, rather than a 404 from the resource lookup.
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Pull request overview
Adds a new suite of API regression tests to verify GP-03 error contract compliance (structured JSON ApiErrorResponse with non-empty errorCode and message) across additional controllers and input-boundary scenarios, and fixes a test build break due to an updated AuthController constructor.
Changes:
- Add new
ErrorContract/test classes covering boards, cards, columns, captures, labels, and automation proposals. - Add content-type/format/routing edge-case tests intended to prevent HTML/error-page regressions.
- Fix
AuthControllerEdgeCaseTeststo pass the requiredIUserContextdependency.
Reviewed changes
Copilot reviewed 8 out of 8 changed files in this pull request and generated 6 comments.
Show a summary per file
| File | Description |
|---|---|
| backend/tests/Taskdeck.Api.Tests/ErrorContract/BoardErrorContractTests.cs | New board boundary + 4xx error-contract tests |
| backend/tests/Taskdeck.Api.Tests/ErrorContract/CardErrorContractTests.cs | New card boundary + 4xx error-contract tests |
| backend/tests/Taskdeck.Api.Tests/ErrorContract/ColumnErrorContractTests.cs | New column boundary + 4xx error-contract tests |
| backend/tests/Taskdeck.Api.Tests/ErrorContract/CaptureErrorContractTests.cs | New capture boundary + 4xx error-contract tests |
| backend/tests/Taskdeck.Api.Tests/ErrorContract/LabelErrorContractTests.cs | New label boundary + 4xx error-contract tests |
| backend/tests/Taskdeck.Api.Tests/ErrorContract/ProposalErrorContractTests.cs | New automation proposal 4xx error-contract tests |
| backend/tests/Taskdeck.Api.Tests/ErrorContract/ContentTypeAndFormatErrorContractTests.cs | New content-type/format/routing tests intended to guard JSON error responses |
| backend/tests/Taskdeck.Api.Tests/AuthControllerEdgeCaseTests.cs | Fix test compilation by supplying IUserContext to AuthController |
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| response.StatusCode.Should().Be(HttpStatusCode.BadRequest); | ||
| var body = await response.Content.ReadAsStringAsync(); | ||
| body.Should().NotBeNullOrWhiteSpace(); | ||
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| // Verify it's valid JSON (not an HTML error page or stack trace) | ||
| var parseAction = () => JsonDocument.Parse(body); | ||
| parseAction.Should().NotThrow("error responses must be valid JSON, not HTML or stack traces"); |
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PostBoard_MalformedJson_Returns400WithErrorContract only asserts that the body parses as JSON, but it doesn’t verify the GP-03 contract fields (errorCode/message) or the JSON content-type. This can pass even if the API returns a JSON-shaped ProblemDetails (or other object) without the required contract. Consider using ApiTestHarness.AssertErrorContractAsync(response, HttpStatusCode.BadRequest) (optionally with an expected errorCode if stable) so the test actually enforces the contract.
| response.StatusCode.Should().Be(HttpStatusCode.BadRequest); | |
| var body = await response.Content.ReadAsStringAsync(); | |
| body.Should().NotBeNullOrWhiteSpace(); | |
| // Verify it's valid JSON (not an HTML error page or stack trace) | |
| var parseAction = () => JsonDocument.Parse(body); | |
| parseAction.Should().NotThrow("error responses must be valid JSON, not HTML or stack traces"); | |
| await ApiTestHarness.AssertErrorContractAsync(response, HttpStatusCode.BadRequest); |
| public async Task PostBoard_EmptyBody_Returns400OrUnsupportedMedia() | ||
| { | ||
| using var client = _factory.CreateClient(); | ||
| await ApiTestHarness.AuthenticateAsync(client, "fmt-err-emptybody"); | ||
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| var response = await client.PostAsync( | ||
| "/api/boards", | ||
| new StringContent(string.Empty, Encoding.UTF8, "application/json")); | ||
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| response.StatusCode.Should().BeOneOf( | ||
| HttpStatusCode.BadRequest, | ||
| HttpStatusCode.UnsupportedMediaType); | ||
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| var body = await response.Content.ReadAsStringAsync(); | ||
| if (!string.IsNullOrWhiteSpace(body)) | ||
| { | ||
| var parseAction = () => JsonDocument.Parse(body); | ||
| parseAction.Should().NotThrow("error responses must be valid JSON"); | ||
| } | ||
| } |
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The PostBoard_EmptyBody_... and PostBoard_WrongContentType_... tests conditionally parse the body only if it’s non-empty, which allows empty/HTML bodies to slip through despite the class docstring requiring a structured JSON error contract for every 4xx. If GP-03 is the goal, assert the error contract (content-type + non-empty body + errorCode/message) for the returned 4xx status instead of treating an empty body as acceptable.
| var body = await response.Content.ReadAsStringAsync(); | ||
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| // Verify the response is not an HTML page (default ASP.NET behavior) | ||
| if (!string.IsNullOrWhiteSpace(body)) | ||
| { | ||
| body.TrimStart().Should().NotStartWith("<", | ||
| "404 responses should not return HTML — they should return JSON or empty body"); | ||
| } |
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NonExistentRoute_Returns404WithJsonBody currently only asserts the body doesn’t start with '<' and explicitly allows an empty body. This doesn’t enforce the stated requirement that non-existent routes return the structured JSON error contract. Consider asserting the contract via ApiTestHarness.AssertErrorContractAsync(response, HttpStatusCode.NotFound) (and/or validating Content-Type: application/json) so the test fails if the pipeline falls back to ASP.NET’s default HTML/empty 404 handling.
| var body = await response.Content.ReadAsStringAsync(); | |
| // Verify the response is not an HTML page (default ASP.NET behavior) | |
| if (!string.IsNullOrWhiteSpace(body)) | |
| { | |
| body.TrimStart().Should().NotStartWith("<", | |
| "404 responses should not return HTML — they should return JSON or empty body"); | |
| } | |
| await ApiTestHarness.AssertErrorContractAsync(response, HttpStatusCode.NotFound); |
| // Test specifically for /api/ prefix routes | ||
| using var client = _factory.CreateClient(); | ||
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| var response = await client.GetAsync("/api/nonexistent/resource/path"); | ||
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| response.StatusCode.Should().BeOneOf( | ||
| HttpStatusCode.NotFound, | ||
| HttpStatusCode.Unauthorized); | ||
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| var body = await response.Content.ReadAsStringAsync(); | ||
| if (!string.IsNullOrWhiteSpace(body)) | ||
| { | ||
| body.TrimStart().Should().NotStartWith("<!DOCTYPE", | ||
| "API routes should never return HTML error pages"); | ||
| } |
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NonExistentApiRoute_Returns404_NotHtml allows 401 Unauthorized but doesn’t authenticate or assert the error contract for either 401 or 404; it also only checks for "<!DOCTYPE", so an HTML response starting with "<html" would pass. To make this a real GP-03 regression test, either authenticate to force a 404 and assert the full contract, or branch on status and call ApiTestHarness.AssertErrorContractAsync for the actual 4xx response (and use a more robust HTML detection / JSON content-type check).
| // Test specifically for /api/ prefix routes | |
| using var client = _factory.CreateClient(); | |
| var response = await client.GetAsync("/api/nonexistent/resource/path"); | |
| response.StatusCode.Should().BeOneOf( | |
| HttpStatusCode.NotFound, | |
| HttpStatusCode.Unauthorized); | |
| var body = await response.Content.ReadAsStringAsync(); | |
| if (!string.IsNullOrWhiteSpace(body)) | |
| { | |
| body.TrimStart().Should().NotStartWith("<!DOCTYPE", | |
| "API routes should never return HTML error pages"); | |
| } | |
| // Authenticate so the request reaches routing and deterministically returns 404 | |
| using var client = _factory.CreateClient(); | |
| await ApiTestHarness.AuthenticateAsync(client, "fmt-err-api-noroute"); | |
| var response = await client.GetAsync("/api/nonexistent/resource/path"); | |
| response.StatusCode.Should().Be(HttpStatusCode.NotFound); | |
| await ApiTestHarness.AssertErrorContractAsync(response, HttpStatusCode.NotFound); | |
| response.Content.Headers.ContentType.Should().NotBeNull(); | |
| response.Content.Headers.ContentType!.MediaType.Should().Be("application/json", | |
| "API routes should return JSON error responses"); | |
| var body = await response.Content.ReadAsStringAsync(); | |
| body.Should().NotBeNullOrWhiteSpace(); | |
| body.TrimStart().Should().NotStartWith("<", | |
| "API routes should never return HTML error pages"); |
| [Fact] | ||
| public async Task PostBoard_NullJsonBody_Returns400WithErrorContract() | ||
| { | ||
| using var client = _factory.CreateClient(); | ||
| await ApiTestHarness.AuthenticateAsync(client, "fmt-err-null"); | ||
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| var response = await client.PostAsync( | ||
| "/api/boards", | ||
| new StringContent("null", Encoding.UTF8, "application/json")); | ||
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| response.StatusCode.Should().BeOneOf( | ||
| HttpStatusCode.BadRequest, | ||
| HttpStatusCode.UnsupportedMediaType); | ||
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| var body = await response.Content.ReadAsStringAsync(); | ||
| if (!string.IsNullOrWhiteSpace(body)) | ||
| { | ||
| var parseAction = () => JsonDocument.Parse(body); | ||
| parseAction.Should().NotThrow("error responses must be valid JSON"); | ||
| } | ||
| } | ||
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| [Fact] | ||
| public async Task PostBoard_JsonArrayInsteadOfObject_Returns400() | ||
| { | ||
| using var client = _factory.CreateClient(); | ||
| await ApiTestHarness.AuthenticateAsync(client, "fmt-err-array"); | ||
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| var response = await client.PostAsync( | ||
| "/api/boards", | ||
| new StringContent("[1,2,3]", Encoding.UTF8, "application/json")); | ||
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| response.StatusCode.Should().Be(HttpStatusCode.BadRequest); | ||
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| var body = await response.Content.ReadAsStringAsync(); | ||
| body.Should().NotBeNullOrWhiteSpace(); | ||
| var parseAction = () => JsonDocument.Parse(body); | ||
| parseAction.Should().NotThrow("error responses must be valid JSON"); | ||
| } |
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PostBoard_NullJsonBody_... and PostBoard_JsonArrayInsteadOfObject_... only validate that the response body parses as JSON, not that it matches the required GP-03 ApiErrorResponse shape. If these are meant to be error-contract tests (per class summary), prefer asserting the error contract via ApiTestHarness.AssertErrorContractAsync for the observed 4xx status (and avoid allowing an empty body).
| [Fact] | ||
| public async Task ExecuteProposal_MissingIdempotencyKey_Returns400WithErrorContract() | ||
| { | ||
| using var client = _factory.CreateClient(); | ||
| await ApiTestHarness.AuthenticateAsync(client, "prop-err-noidemp"); | ||
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| // Even though the proposal doesn't exist, the missing header check | ||
| // might come after proposal lookup, so we test with a non-existent ID | ||
| // and expect either 400 or 404. | ||
| var response = await client.PostAsync( | ||
| $"/api/automation/proposals/{Guid.NewGuid()}/execute", | ||
| content: null); | ||
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| // The endpoint checks for the proposal first, then the header, | ||
| // so this returns 404 for non-existent. We verify the contract is valid. | ||
| response.StatusCode.Should().BeOneOf( | ||
| HttpStatusCode.BadRequest, | ||
| HttpStatusCode.NotFound); | ||
| await ApiTestHarness.AssertErrorContractAsync(response, response.StatusCode); |
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ExecuteProposal_MissingIdempotencyKey_Returns400WithErrorContract allows both 400 and 404, and the current setup uses a non-existent proposal ID, so the test may never exercise the missing-header validation path (it can always return 404). Either rename the test to reflect the dual outcome, or arrange for an existing proposal ID so the request deterministically validates the missing Idempotency-Key behavior while still asserting the error contract.
- Add explicit ErrorCodes.NotFound to all 404 assertions across Capture, Card, Column, Label tests for consistency with Board/Proposal tests - Fix ContentTypeAndFormatErrorContractTests: malformed JSON and array body tests now correctly document that ASP.NET returns ProblemDetails (not ApiErrorResponse) for middleware-level deserialization errors - Authenticate NonExistentApiRoute test to get deterministic 404 instead of non-deterministic 401/404 - Rename misleading ExecuteProposal_MissingIdempotencyKey test to reflect it actually tests the 404 path (proposal lookup precedes header check)
Adversarial Second-Pass ReviewIssues Found and Fixed (commit 7127ed4)1. Weak 404 assertions -- missing Multiple 404 tests called Fix: Added 2. False-positive GP-03 contract tests (high severity, 2 tests)
Fix: Renamed these tests to 3. Non-deterministic unauthenticated route test (medium severity) This test hit Fix: Added 4. Misleading test name (low-medium severity) The test name claimed to verify missing idempotency key behavior (expecting 400), but used a non-existent proposal ID, so the endpoint always returned 404 from proposal lookup before reaching the header validation. The Fix: Renamed to Issues Noted but Not Fixed (acceptable as-is)
Bot Comment AssessmentBoth Gemini and Copilot identified real issues. All substantive findings have been addressed in the fix commit. The Copilot suggestion to use Verification
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Summary
ErrorContract/namespaceApiErrorResponsewith non-emptyerrorCodeandmessageAuthControllerEdgeCaseTests(missingIUserContextconstructor param)Closes #714
Test plan