feat(P15B-1,P15B-6): 完成请假V1闭环

server/tests/unit/services/leave.test.js

@@ -0,0 +1,107 @@
+const {
+  calculateRequestedDays,
+  leaveRangesOverlap,
+  summarizeLeaveLedgerEntries,
+} = require("../../../src/services/leave");
+
+describe("Leave Service", () => {
+  describe("calculateRequestedDays", () => {
+    it("supports same-day half-day requests", () => {
+      expect(
+        calculateRequestedDays({
+          startDate: "2026-03-10",
+          endDate: "2026-03-10",
+          startSession: "am",
+          endSession: "am",
+        }),
+      ).toBe(0.5);
+
+      expect(
+        calculateRequestedDays({
+          startDate: "2026-03-10",
+          endDate: "2026-03-10",
+          startSession: "pm",
+          endSession: "pm",
+        }),
+      ).toBe(0.5);
+    });
+
+    it("supports cross-day half-day boundaries", () => {
+      expect(
+        calculateRequestedDays({
+          startDate: "2026-03-10",
+          endDate: "2026-03-12",
+          startSession: "pm",
+          endSession: "am",
+        }),
+      ).toBe(2);
+    });
+
+    it("rejects invalid session ranges", () => {
+      expect(() =>
+        calculateRequestedDays({
+          startDate: "2026-03-10",
+          endDate: "2026-03-10",
+          startSession: "pm",
+          endSession: "am",
+        }),
+      ).toThrow(/参数校验失败/);
+    });
+  });
+
+  describe("leaveRangesOverlap", () => {
+    it("detects overlapping half-day ranges", () => {
+      expect(
+        leaveRangesOverlap(
+          {
+            startDate: "2026-03-10",
+            endDate: "2026-03-11",
+            startSession: "pm",
+            endSession: "pm",
+          },
+          {
+            startDate: "2026-03-11",
+            endDate: "2026-03-12",
+            startSession: "am",
+            endSession: "am",
+          },
+        ),
+      ).toBe(true);
+    });
+
+    it("does not flag non-overlapping adjacent ranges", () => {
+      expect(
+        leaveRangesOverlap(
+          {
+            startDate: "2026-03-10",
+            endDate: "2026-03-10",
+            startSession: "am",
+            endSession: "am",
+          },
+          {
+            startDate: "2026-03-10",
+            endDate: "2026-03-10",
+            startSession: "pm",
+            endSession: "pm",
+          },
+        ),
+      ).toBe(false);
+    });
+  });
+
+  describe("summarizeLeaveLedgerEntries", () => {
+    it("calculates reserve / consume / release balances correctly", () => {
+      const summary = summarizeLeaveLedgerEntries([
+        { entry_type: "grant", days: 10 },
+        { entry_type: "reserve", days: 2.5 },
+        { entry_type: "release", days: 1 },
+        { entry_type: "consume", days: 1.5 },
+      ]);
+
+      expect(summary.granted).toBe(10);
+      expect(summary.reserved).toBe(1.5);
+      expect(summary.used).toBe(1.5);
+      expect(summary.available).toBe(7);
+    });
+  });
+});