🧪 test(kebab-app): schema_with_config integration coverage (fb-27)

Two scenarios: freshly-ingested 2-doc KB (stats reflect counts +
last_ingest_at populated) and empty-but-initialized KB (counts zero,
last_ingest_at None). The empty case runs ingest_with_config over an
empty workspace dir to seed kebab.sqlite before calling schema_with_config,
since open_existing (used internally) returns NotIndexed if the DB is absent.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/kebab-app/tests/schema_report.rs

@@ -0,0 +1,109 @@
+//! Integration test: kebab_app::schema_with_config returns a SchemaV1
+//! that is internally consistent with a freshly-ingested TempDir KB.
+
+use std::fs;
+
+use kebab_config::Config;
+use kebab_core::SourceScope;
+
+fn minimal_config(data_dir: &std::path::Path, workspace_root: &std::path::Path) -> Config {
+    let mut config = Config::defaults();
+    config.workspace.root = workspace_root.to_string_lossy().into_owned();
+    config.workspace.exclude.clear();
+    config.storage.data_dir = data_dir.to_string_lossy().into_owned();
+    config.storage.model_dir = data_dir.join("models").to_string_lossy().into_owned();
+    config.models.embedding.provider = "none".to_string();
+    config.models.embedding.dimensions = 0;
+    config.chunking.target_tokens = 80;
+    config.chunking.overlap_tokens = 20;
+    config
+}
+
+fn minimal_scope(workspace_root: &std::path::Path) -> SourceScope {
+    SourceScope {
+        root: workspace_root.to_path_buf(),
+        include: vec![],
+        exclude: vec![],
+    }
+}
+
+#[test]
+fn schema_report_reflects_freshly_ingested_kb() {
+    let temp = tempfile::tempdir().expect("tempdir");
+    let workspace_root = temp.path().join("workspace");
+    let data_dir = temp.path().join("data");
+    fs::create_dir_all(&workspace_root).unwrap();
+    fs::create_dir_all(&data_dir).unwrap();
+
+    fs::write(workspace_root.join("a.md"), "# A\n\nbody A.").unwrap();
+    fs::write(workspace_root.join("b.md"), "# B\n\nbody B.").unwrap();
+
+    let config = minimal_config(&data_dir, &workspace_root);
+    let _report =
+        kebab_app::ingest_with_config(config.clone(), minimal_scope(&workspace_root), false)
+            .unwrap();
+
+    let schema = kebab_app::schema_with_config(&config).unwrap();
+
+    assert!(!schema.kebab_version.is_empty());
+    assert!(
+        schema.wire.schemas.contains(&"schema.v1".to_string()),
+        "schema.v1 missing from wire.schemas: {:?}",
+        schema.wire.schemas
+    );
+    assert!(
+        schema.wire.schemas.contains(&"error.v1".to_string()),
+        "error.v1 missing from wire.schemas: {:?}",
+        schema.wire.schemas
+    );
+    assert!(schema.capabilities.json_mode);
+    assert!(!schema.capabilities.streaming_ask);
+    assert_eq!(
+        schema.stats.doc_count, 2,
+        "expected 2 docs (a.md + b.md): {:?}",
+        schema.stats
+    );
+    assert!(
+        schema.stats.last_ingest_at.is_some(),
+        "last_ingest_at must be set after ingest: {:?}",
+        schema.stats
+    );
+}
+
+#[test]
+fn schema_report_on_empty_kb_has_zero_counts() {
+    // An empty workspace dir with no .md files: ingest_with_config scans 0
+    // files but still creates + migrates kebab.sqlite. This seeds the DB so
+    // open_existing (used inside schema_with_config) succeeds and returns
+    // all-zero counts.
+    let temp = tempfile::tempdir().expect("tempdir");
+    let workspace_root = temp.path().join("workspace");
+    let data_dir = temp.path().join("data");
+    fs::create_dir_all(&workspace_root).unwrap();
+    fs::create_dir_all(&data_dir).unwrap();
+
+    let config = minimal_config(&data_dir, &workspace_root);
+    // Run ingest over the empty workspace — creates kebab.sqlite, runs
+    // migrations, records 0 docs. schema_with_config can then open_existing.
+    let report =
+        kebab_app::ingest_with_config(config.clone(), minimal_scope(&workspace_root), false)
+            .unwrap();
+    assert_eq!(report.new, 0, "empty workspace should yield 0 new docs");
+
+    let schema = kebab_app::schema_with_config(&config).unwrap();
+    assert_eq!(
+        schema.stats.doc_count, 0,
+        "empty KB doc_count: {:?}",
+        schema.stats
+    );
+    assert_eq!(
+        schema.stats.chunk_count, 0,
+        "empty KB chunk_count: {:?}",
+        schema.stats
+    );
+    assert!(
+        schema.stats.last_ingest_at.is_none(),
+        "last_ingest_at must be None when no docs ingested: {:?}",
+        schema.stats
+    );
+}