prlens 0.1.1

One queue for all your PRs — aggregates GitHub and Bitbucket review requests into a single interactive view
Documentation 
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// Integration tests for GitHubProvider against a wiremock HTTP mock server.
// These tests validate the full Provider trait contract without hitting the real GitHub API:
//   - AUTH-01: list_prs() returns correctly mapped PullRequest from search response
//   - AUTH-01 boundary: list_prs() returns empty Vec when no PRs match
//   - D-02: re-review detection works when new commits exist since approval
//   - ARCH-04: second list_prs() call within 60s returns cached data without API call

use prlens::config::GithubConfig;
use prlens::models::ReviewStatus;
use prlens::provider::github::GitHubProvider;
use prlens::provider::Provider;
use serde_json::json;
use wiremock::matchers::{method, path, query_param};
use wiremock::{Mock, MockServer, ResponseTemplate};

// Install the ring CryptoProvider for rustls before each test that makes HTTP requests.
// Both ring and aws-lc-rs are in the transitive dependency tree (via reqwest/octocrab).
// When both features are present, rustls cannot auto-detect the provider — we must
// install one explicitly. `install_default()` is idempotent (no-op if already set).
fn ensure_crypto_provider() {
    let _ = rustls::crypto::ring::default_provider().install_default();
}

// ---------------------------------------------------------------------------
// Helper: base Author fixture used in multiple tests
// ---------------------------------------------------------------------------

fn author_fixture(login: &str, id: u64) -> serde_json::Value {
    json!({
        "login": login,
        "id": id,
        "node_id": "U_testnode",
        "avatar_url": "https://avatars.githubusercontent.com/u/1",
        "gravatar_id": "",
        "url": format!("https://api.github.com/users/{}", login),
        "html_url": format!("https://github.com/{}", login),
        "followers_url": format!("https://api.github.com/users/{}/followers", login),
        "following_url": format!("https://api.github.com/users/{}/following{{/other_user}}", login),
        "gists_url": format!("https://api.github.com/users/{}/gists{{/gist_id}}", login),
        "starred_url": format!("https://api.github.com/users/{}/starred{{/owner}}{{/repo}}", login),
        "subscriptions_url": format!("https://api.github.com/users/{}/subscriptions", login),
        "organizations_url": format!("https://api.github.com/users/{}/orgs", login),
        "repos_url": format!("https://api.github.com/users/{}/repos", login),
        "events_url": format!("https://api.github.com/users/{}/events{{/privacy}}", login),
        "received_events_url": format!("https://api.github.com/users/{}/received_events", login),
        "type": "User",
        "site_admin": false
    })
}

// ---------------------------------------------------------------------------
// Helper: a minimal search Issue fixture
// ---------------------------------------------------------------------------

fn search_issue_fixture(
    number: u64,
    title: &str,
    author_login: &str,
    author_id: u64,
    owner: &str,
    repo: &str,
) -> serde_json::Value {
    json!({
        "id": number * 1000,
        "node_id": format!("I_test{}", number),
        "url": format!("https://api.github.com/repos/{}/{}/issues/{}", owner, repo, number),
        "repository_url": format!("https://api.github.com/repos/{}/{}", owner, repo),
        "labels_url": format!("https://api.github.com/repos/{}/{}/issues/{}/labels{{/name}}", owner, repo, number),
        "comments_url": format!("https://api.github.com/repos/{}/{}/issues/{}/comments", owner, repo, number),
        "events_url": format!("https://api.github.com/repos/{}/{}/issues/{}/events", owner, repo, number),
        "html_url": format!("https://github.com/{}/{}/pull/{}", owner, repo, number),
        "number": number,
        "state": "open",
        "title": title,
        "user": author_fixture(author_login, author_id),
        "labels": [],
        "assignee": null,
        "assignees": [],
        "locked": false,
        "comments": 0,
        "created_at": "2026-05-27T10:00:00Z",
        "updated_at": "2026-05-27T10:00:00Z",
        "pull_request": {
            "url": format!("https://api.github.com/repos/{}/{}/pulls/{}", owner, repo, number),
            "html_url": format!("https://github.com/{}/{}/pull/{}", owner, repo, number),
            "diff_url": format!("https://github.com/{}/{}/pull/{}.diff", owner, repo, number),
            "patch_url": format!("https://github.com/{}/{}/pull/{}.patch", owner, repo, number)
        }
    })
}

// ---------------------------------------------------------------------------
// Helper: mount the /user endpoint on a mock server
// ---------------------------------------------------------------------------

async fn mount_user_endpoint(mock_server: &MockServer, login: &str, id: u64) {
    Mock::given(method("GET"))
        .and(path("/user"))
        .respond_with(ResponseTemplate::new(200).set_body_json(author_fixture(login, id)))
        .mount(mock_server)
        .await;
}

// ---------------------------------------------------------------------------
// Helper: mount an empty re-review search response (no approved PRs)
// ---------------------------------------------------------------------------

async fn mount_empty_re_review_search(mock_server: &MockServer) {
    Mock::given(method("GET"))
        .and(path("/search/issues"))
        .and(query_param("q", "is:pr is:open reviewed-by:@me review:approved"))
        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
            "total_count": 0,
            "incomplete_results": false,
            "items": []
        })))
        .mount(mock_server)
        .await;
}

// ---------------------------------------------------------------------------
// TEST 1: list_prs() maps a search result to PullRequest correctly (AUTH-01, D-03)
// ---------------------------------------------------------------------------

#[tokio::test]
async fn list_prs_returns_search_results() {
    ensure_crypto_provider();
    let mock_server = MockServer::start().await;
    let temp_dir = tempfile::TempDir::new().expect("TempDir failed");
    let cache_file = temp_dir.path().join("github.json");

    // Mount current user endpoint
    mount_user_endpoint(&mock_server, "testuser", 99).await;

    // Mount primary search: 1 PR review-requested
    Mock::given(method("GET"))
        .and(path("/search/issues"))
        .and(query_param("q", "is:pr is:open review-requested:@me"))
        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
            "total_count": 1,
            "incomplete_results": false,
            "items": [
                search_issue_fixture(42, "feat: add feature", "alice", 1, "owner", "repo")
            ]
        })))
        .mount(&mock_server)
        .await;

    // Mount re-review search: no approved PRs requiring re-review
    mount_empty_re_review_search(&mock_server).await;

    let provider = GitHubProvider::new_with_base_url(
        GithubConfig::default(),
        mock_server.uri(),
        cache_file,
    );

    let result = provider.list_prs().await.unwrap();

    assert_eq!(result.len(), 1, "Expected exactly 1 PR");
    assert_eq!(result[0].number, 42);
    assert_eq!(result[0].title, "feat: add feature");
    assert_eq!(result[0].provider, "github");
    assert_eq!(result[0].author.login, "alice");
    assert_eq!(result[0].repo_full_name, "owner/repo");
}

// ---------------------------------------------------------------------------
// TEST 2: list_prs() returns empty Vec when no PRs match (AUTH-01 boundary)
// ---------------------------------------------------------------------------

#[tokio::test]
async fn list_prs_empty_when_no_prs() {
    ensure_crypto_provider();
    let mock_server = MockServer::start().await;
    let temp_dir = tempfile::TempDir::new().expect("TempDir failed");
    let cache_file = temp_dir.path().join("github.json");

    // Mount current user endpoint
    mount_user_endpoint(&mock_server, "testuser", 99).await;

    // Mount primary search: 0 PRs
    Mock::given(method("GET"))
        .and(path("/search/issues"))
        .and(query_param("q", "is:pr is:open review-requested:@me"))
        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
            "total_count": 0,
            "incomplete_results": false,
            "items": []
        })))
        .mount(&mock_server)
        .await;

    // Mount re-review search: no approved PRs
    mount_empty_re_review_search(&mock_server).await;

    let provider = GitHubProvider::new_with_base_url(
        GithubConfig::default(),
        mock_server.uri(),
        cache_file,
    );

    let result = provider.list_prs().await;
    assert!(result.is_ok(), "Expected Ok result, got: {:?}", result.err());
    assert_eq!(result.unwrap().len(), 0, "Expected empty Vec");
}

// ---------------------------------------------------------------------------
// TEST 3: re-review detection — PR shows as InReview when user approved
//         but new commits were pushed since (D-02, D-03)
// ---------------------------------------------------------------------------

#[tokio::test]
async fn re_review_detected() {
    ensure_crypto_provider();
    let mock_server = MockServer::start().await;
    let temp_dir = tempfile::TempDir::new().expect("TempDir failed");
    let cache_file = temp_dir.path().join("github.json");

    // Mount current user endpoint
    mount_user_endpoint(&mock_server, "testuser", 99).await;

    // Mount primary search: no review-requested PRs
    Mock::given(method("GET"))
        .and(path("/search/issues"))
        .and(query_param("q", "is:pr is:open review-requested:@me"))
        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
            "total_count": 0,
            "incomplete_results": false,
            "items": []
        })))
        .mount(&mock_server)
        .await;

    // Mount re-review candidate search: PR #99 where user already approved
    Mock::given(method("GET"))
        .and(path("/search/issues"))
        .and(query_param("q", "is:pr is:open reviewed-by:@me review:approved"))
        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
            "total_count": 1,
            "incomplete_results": false,
            "items": [
                search_issue_fixture(99, "old feature", "prauthor", 2, "owner", "repo")
            ]
        })))
        .mount(&mock_server)
        .await;

    // Mount list_reviews for PR #99: testuser approved at commit abc123
    Mock::given(method("GET"))
        .and(path("/repos/owner/repo/pulls/99/reviews"))
        .respond_with(ResponseTemplate::new(200).set_body_json(json!([
            {
                "id": 1,
                "node_id": "PRR_test1",
                "html_url": "https://github.com/owner/repo/pull/99#pullrequestreview-1",
                "user": author_fixture("testuser", 99),
                "body": null,
                "commit_id": "abc123",
                "state": "APPROVED",
                "submitted_at": "2026-05-20T10:00:00Z",
                "pull_request_url": "https://api.github.com/repos/owner/repo/pulls/99",
                "author_association": "COLLABORATOR",
                "_links": {
                    "html": { "href": "https://github.com/owner/repo/pull/99#pullrequestreview-1" },
                    "pull_request": { "href": "https://api.github.com/repos/owner/repo/pulls/99" }
                }
            }
        ])))
        .mount(&mock_server)
        .await;

    // Mount full PR fetch for PR #99: current head SHA is def456 (differs from approval commit abc123)
    Mock::given(method("GET"))
        .and(path("/repos/owner/repo/pulls/99"))
        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
            "url": "https://api.github.com/repos/owner/repo/pulls/99",
            "id": 99000,
            "node_id": "PR_test99",
            "html_url": "https://github.com/owner/repo/pull/99",
            "diff_url": "https://github.com/owner/repo/pull/99.diff",
            "patch_url": "https://github.com/owner/repo/pull/99.patch",
            "issue_url": "https://api.github.com/repos/owner/repo/issues/99",
            "commits_url": "https://api.github.com/repos/owner/repo/pulls/99/commits",
            "review_comments_url": "https://api.github.com/repos/owner/repo/pulls/99/comments",
            "review_comment_url": "https://api.github.com/repos/owner/repo/pulls/comments{/number}",
            "comments_url": "https://api.github.com/repos/owner/repo/issues/99/comments",
            "statuses_url": "https://api.github.com/repos/owner/repo/statuses/def456",
            "number": 99,
            "state": "open",
            "locked": false,
            "maintainer_can_modify": false,
            "title": "old feature",
            "user": author_fixture("prauthor", 2),
            "body": null,
            "labels": [],
            "assignees": [],
            "requested_reviewers": [],
            "requested_teams": [],
            "created_at": "2026-05-01T10:00:00Z",
            "updated_at": "2026-05-27T10:00:00Z",
            "merged": false,
            "head": {
                "ref": "feat/old",
                "sha": "def456",
                "label": "owner:feat/old",
                "user": author_fixture("owner", 1),
                "repo": null
            },
            "base": {
                "ref": "main",
                "sha": "000000",
                "label": "owner:main",
                "user": author_fixture("owner", 1),
                "repo": null
            },
            "_links": {
                "self": { "href": "https://api.github.com/repos/owner/repo/pulls/99" },
                "html": { "href": "https://github.com/owner/repo/pull/99" }
            },
            "author_association": "NONE",
            "additions": 0,
            "deletions": 0,
            "changed_files": 0,
            "commits": 1,
            "review_comments": 0,
            "comments": 0
        })))
        .mount(&mock_server)
        .await;

    let provider = GitHubProvider::new_with_base_url(
        GithubConfig::default(),
        mock_server.uri(),
        cache_file,
    );

    let result = provider.list_prs().await.unwrap();

    assert_eq!(result.len(), 1, "Expected exactly 1 re-review PR");
    assert_eq!(result[0].number, 99);
    assert!(
        matches!(result[0].review_status, ReviewStatus::InReview),
        "Expected ReviewStatus::InReview, got {:?}",
        result[0].review_status
    );
}

// ---------------------------------------------------------------------------
// TEST 4: cache_hit_skips_api_call — second call returns cached data (ARCH-04)
// Cache is pre-populated; mock server has no routes so any API call returns 404.
// ---------------------------------------------------------------------------

#[tokio::test]
async fn cache_hit_skips_api_call() {
    let temp_dir = tempfile::TempDir::new().expect("TempDir failed");
    let cache_file = temp_dir.path().join("github.json");

    // Write a fresh CacheEntry<Vec<PullRequest>> directly to the cache file.
    // Use serde_json to construct the exact shape that cache::read_cache expects.
    let now = chrono::Utc::now().to_rfc3339();
    let cached_pr_json = json!({
        "fetched_at": now,
        "ttl_seconds": 60,
        "data": [{
            "id": {
                "provider": "github",
                "owner": "owner",
                "repo": "repo",
                "number": 7
            },
            "number": 7,
            "title": "cached pr",
            "url": "https://github.com/owner/repo/pull/7",
            "author": {
                "login": "cacheduser",
                "display_name": null,
                "avatar_url": null
            },
            "reviewers": [],
            "repo_full_name": "owner/repo",
            "provider": "github",
            "head_branch": "",
            "base_branch": "",
            "state": "Open",
            "review_status": "NeedsReview",
            "ci_status": null,
            "draft": false,
            "created_at": "2026-05-27T10:00:00Z",
            "updated_at": "2026-05-27T10:00:00Z",
            "labels": [],
            "comment_count": 0,
            "additions": null,
            "deletions": null
        }]
    });

    std::fs::write(&cache_file, cached_pr_json.to_string()).expect("Failed to write cache file");

    // Start a mock server with NO routes — any HTTP call will return 404.
    let mock_server = MockServer::start().await;

    let provider = GitHubProvider::new_with_base_url(
        GithubConfig::default(),
        mock_server.uri(),
        cache_file,
    );

    let result = provider.list_prs().await.unwrap();

    assert_eq!(result.len(), 1, "Expected 1 cached PR");
    assert_eq!(result[0].number, 7, "Expected PR number 7 from cache");
    assert_eq!(result[0].title, "cached pr");

    // Verify that mock server received zero requests (cache bypass)
    let received = mock_server.received_requests().await.unwrap();
    assert!(
        received.is_empty(),
        "Expected 0 API calls on cache hit, got: {} request(s)",
        received.len()
    );
}