Add Promptkit configuration and inspection seams

internal/config/promptkit_test.go

@@ -0,0 +1,101 @@
+package config
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"gopkg.in/yaml.v3"
+)
+
+func TestPromptkitDefaultsAndYAML(t *testing.T) {
+	cfg := Defaults()
+	if cfg.Promptkit.Timeout != 2*time.Minute || cfg.Promptkit.Local.ConcurrencyLimit != 1 {
+		t.Fatalf("Promptkit defaults = %#v", cfg.Promptkit)
+	}
+	if err := yaml.Unmarshal([]byte(`
+promptkit:
+  profile: selected
+  profile_file: /etc/weatherreporter/profile.yml
+  timeout: 45s
+  local:
+    endpoint: http://127.0.0.1:8080
+    concurrency_limit: 0
+`), &cfg); err != nil {
+		t.Fatalf("Unmarshal() error = %v", err)
+	}
+	if cfg.Promptkit.Profile != "selected" || cfg.Promptkit.ProfileFile != "/etc/weatherreporter/profile.yml" || cfg.Promptkit.Timeout != 45*time.Second || cfg.Promptkit.Local.Endpoint != "http://127.0.0.1:8080" || cfg.Promptkit.Local.ConcurrencyLimit != 0 {
+		t.Fatalf("Promptkit YAML = %#v", cfg.Promptkit)
+	}
+	if err := Validate(cfg); err != nil {
+		t.Fatalf("Validate() error = %v", err)
+	}
+}
+
+func TestValidatePromptkit(t *testing.T) {
+	tests := []struct {
+		name    string
+		mutate  func(*PromptkitConfig)
+		wantErr string
+	}{
+		{
+			name: "profile sources conflict",
+			mutate: func(cfg *PromptkitConfig) {
+				cfg.ProfileFile = "profile.yml"
+				cfg.ProfileDir = "profiles"
+			},
+			wantErr: "profile_file",
+		},
+		{
+			name: "nonpositive timeout",
+			mutate: func(cfg *PromptkitConfig) {
+				cfg.Timeout = 0
+			},
+			wantErr: "timeout",
+		},
+		{
+			name: "invalid local endpoint",
+			mutate: func(cfg *PromptkitConfig) {
+				cfg.Local.Endpoint = "not a URL"
+			},
+			wantErr: "local.endpoint",
+		},
+		{
+			name: "negative local concurrency",
+			mutate: func(cfg *PromptkitConfig) {
+				cfg.Local.ConcurrencyLimit = -1
+			},
+			wantErr: "concurrency_limit",
+		},
+		{
+			name: "unlimited local concurrency",
+			mutate: func(cfg *PromptkitConfig) {
+				cfg.Local.Endpoint = "http://127.0.0.1:8080"
+				cfg.Local.ConcurrencyLimit = 0
+			},
+		},
+		{
+			name: "unregistered local backend",
+			mutate: func(cfg *PromptkitConfig) {
+				cfg.Local.Endpoint = ""
+				cfg.Local.ConcurrencyLimit = 1
+			},
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			cfg := Defaults()
+			test.mutate(&cfg.Promptkit)
+			err := Validate(cfg)
+			if test.wantErr == "" {
+				if err != nil {
+					t.Fatalf("Validate() error = %v", err)
+				}
+				return
+			}
+			if err == nil || !strings.Contains(err.Error(), test.wantErr) {
+				t.Fatalf("Validate() error = %v, want %q", err, test.wantErr)
+			}
+		})
+	}
+}