test: stop example tests from writing SQLite files into examples/

pkg/teamloader/teamloader_test.go

@@ -76,66 +76,69 @@ func TestGetToolsForAgent_ContinuesOnCreateToolError(t *testing.T) {
 func TestLoadExamples(t *testing.T) {
 	examples := collectExamples(t)
 
-	// Collect required env vars from all examples by checking configs directly.
-	// This avoids calling Load() twice for each example.
-	missingEnvs := make(map[string]bool)
-	for _, agentFilename := range examples {
-		agentSource, err := config.Resolve(agentFilename, nil)
-		require.NoError(t, err)
-
-		cfg, err := config.Load(t.Context(), agentSource)
-		require.NoError(t, err)
-
-		for _, env := range config.GatherEnvVarsForModels(cfg) {
-			missingEnvs[env] = true
-		}
-
-		toolEnvs, _ := config.GatherEnvVarsForTools(t.Context(), cfg)
-		for _, env := range toolEnvs {
-			missingEnvs[env] = true
-		}
-	}
-
-	for name := range missingEnvs {
-		t.Setenv(name, "dummy")
-	}
-
-	runConfig := &config.RuntimeConfig{}
-
-	type versioned struct {
-		Version string `yaml:"version"`
+	// Set every env var referenced by the examples to a dummy value so model
+	// and tool initialisation succeeds without real credentials.
+	for env := range gatherExampleEnvVars(t, examples) {
+		t.Setenv(env, "dummy")
 	}
 
-	// Load all the examples.
-	// Note: don't use t.Parallel() to avoid SQLite lock contention when
-	// multiple RAG examples share the same relative database paths (e.g., ./bm25.db).
 	for _, agentFilename := range examples {
 		t.Run(agentFilename, func(t *testing.T) {
-			agentSource, err := config.Resolve(agentFilename, nil)
-			require.NoError(t, err)
+			t.Parallel()
 
-			// First make sure it doesn't define a version
-			data, err := agentSource.Read(t.Context())
+			data, err := os.ReadFile(agentFilename)
 			require.NoError(t, err)
 
-			var v versioned
-			err = yaml.Unmarshal(data, &v)
-			require.NoError(t, err)
+			// Examples must not pin a version: they should always parse with
+			// the latest config schema.
+			var v struct {
+				Version string `yaml:"version"`
+			}
+			require.NoError(t, yaml.Unmarshal(data, &v))
 			require.Empty(t, v.Version, "example %s should not define a version", agentFilename)
 
-			// Then make sure the config loads successfully
+			// Use a bytes source (ParentDir == "") plus a temp WorkingDir so
+			// toolsets that write to disk (memory, RAG, cache, ...) land in
+			// the temp dir instead of the examples/ tree.
+			agentSource := config.NewBytesSource(agentFilename, data)
+			runConfig := &config.RuntimeConfig{}
+			runConfig.WorkingDir = t.TempDir()
+
 			teams, err := Load(t.Context(), agentSource, runConfig)
-			if err != nil {
-				if errors.Is(err, dmr.ErrNotInstalled) && filepath.Base(agentFilename) == "dmr.yaml" {
-					t.Skip("Skipping DMR example: Docker Model Runner not installed")
-				}
+			if errors.Is(err, dmr.ErrNotInstalled) && filepath.Base(agentFilename) == "dmr.yaml" {
+				t.Skip("Skipping DMR example: Docker Model Runner not installed")
 			}
 			require.NoError(t, err)
 			assert.NotEmpty(t, teams)
 		})
 	}
 }
 
+// gatherExampleEnvVars returns the union of env vars referenced by the given
+// example files (both for models and toolsets). The set is collected up-front
+// so t.Setenv can be called before any subtest starts.
+func gatherExampleEnvVars(t *testing.T, examples []string) map[string]bool {
+	t.Helper()
+
+	envs := make(map[string]bool)
+	for _, agentFilename := range examples {
+		agentSource, err := config.Resolve(agentFilename, nil)
+		require.NoError(t, err)
+
+		cfg, err := config.Load(t.Context(), agentSource)
+		require.NoError(t, err)
+
+		for _, env := range config.GatherEnvVarsForModels(cfg) {
+			envs[env] = true
+		}
+		toolEnvs, _ := config.GatherEnvVarsForTools(t.Context(), cfg)
+		for _, env := range toolEnvs {
+			envs[env] = true
+		}
+	}
+	return envs
+}
+
 func TestLoadDefaultAgent(t *testing.T) {
 	t.Setenv("HOME", t.TempDir())