feat: add lab result endpoint

internal/repository/lab_result_test.go

@@ -0,0 +1,47 @@
+package repository
+
+import (
+	"database/sql"
+	"testing"
+	"time"
+)
+
+func TestLabAgeCodeMatchesCarbonDateDiff(t *testing.T) {
+	birth := time.Date(1993, time.March, 4, 0, 0, 0, 0, time.UTC)
+	transaction := time.Date(2026, time.August, 19, 0, 0, 0, 0, time.UTC)
+	if got := labAgeCode(birth, transaction); got != "0330515" {
+		t.Fatalf("age code=%s, want 0330515", got)
+	}
+
+	endOfMonthBirth := time.Date(2025, time.January, 31, 0, 0, 0, 0, time.UTC)
+	marchFirst := time.Date(2025, time.March, 1, 0, 0, 0, 0, time.UTC)
+	if got := labAgeCode(endOfMonthBirth, marchFirst); got != "0000029" {
+		t.Fatalf("end-of-month age code=%s, want 0000029", got)
+	}
+}
+
+func TestFormatLabReferenceValue(t *testing.T) {
+	value := formatLabReferenceValue(
+		sql.NullString{},
+		sql.NullString{String: "12.5", Valid: true},
+		sql.NullString{String: "17.5", Valid: true},
+	)
+	if value == nil || *value != "12.5 - 17.5" {
+		t.Fatalf("reference=%v", value)
+	}
+
+	description := formatLabReferenceValue(sql.NullString{String: " Normal ", Valid: true}, sql.NullString{}, sql.NullString{})
+	if description == nil || *description != "Normal" {
+		t.Fatalf("description=%v", description)
+	}
+}
+
+func TestFindColumnIsCaseInsensitiveAndHonorsCandidatePriority(t *testing.T) {
+	columns := []string{"Lab_AnalyzerID", "AnalyzerID", "PROSES"}
+	if got := findColumn(columns, "AnalyzerID", "Lab_AnalyzerID"); got != "AnalyzerID" {
+		t.Fatalf("column=%q", got)
+	}
+	if got := findColumn(columns, "Proses"); got != "PROSES" {
+		t.Fatalf("column=%q", got)
+	}
+}