Resolve extraction reference bindings from config

internal/core/config/validation_test.go

@@ -116,6 +116,73 @@ func TestValidateRejectsInvalidDiagnosticsRetention(t *testing.T) {
 	}
 }
 
+func TestValidateRejectsInvalidReferenceMaps(t *testing.T) {
+	tests := []struct {
+		name   string
+		mutate func(Config) Config
+		want   []string
+	}{
+		{
+			name: "empty pipeline slot",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				profile.References = map[string]string{" ": "./roster.yml"}
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "reference slot", "empty"},
+		},
+		{
+			name: "empty pipeline source",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				profile.References = map[string]string{"roster": " "}
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "roster", "source", "empty"},
+		},
+		{
+			name: "empty lane slot",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				lane := profile.Artifacts["events"]
+				lane.References = map[string]string{" ": "./roster.yml"}
+				profile.Artifacts["events"] = lane
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "events", "reference slot", "empty"},
+		},
+		{
+			name: "empty lane source",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				lane := profile.Artifacts["events"]
+				lane.References = map[string]string{"roster": " "}
+				profile.Artifacts["events"] = lane
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "events", "roster", "source", "empty"},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			err := tc.mutate(validConfig()).Validate()
+			if err == nil {
+				t.Fatal("Validate() error = nil, want error")
+			}
+			for _, want := range tc.want {
+				if !strings.Contains(err.Error(), want) {
+					t.Fatalf("Validate() error = %q, want substring %q", err.Error(), want)
+				}
+			}
+		})
+	}
+}
+
 func TestValidateRejectsEmptyIDs(t *testing.T) {
 	tests := []struct {
 		name   string