fix(zh): don't consume a leading Chinese numeral as a word boundary

src/locales/zh/hans/parsers/ZHHansAgoFormatParser.ts

@@ -17,6 +17,12 @@ const NUMBER_GROUP = 1;
 const UNIT_GROUP = 2;
 
 export default class ZHHansAgoFormatParser extends AbstractParserWithWordBoundaryChecking {
+    patternLeftBoundary(): string {
+        // Return a capturing group to ensure that the match index is correct in the base class
+        // while avoiding matching CJK characters as word boundaries.
+        return "()";
+    }
+
     innerPattern(): RegExp {
         return PATTERN;
     }

src/locales/zh/hans/parsers/ZHHansDateParser.ts

@@ -7,6 +7,12 @@ const MONTH_GROUP = 2;
 const DAY_GROUP = 3;
 
 export default class ZHHansDateParser extends AbstractParserWithWordBoundaryChecking {
+    patternLeftBoundary(): string {
+        // Return a capturing group to ensure that the match index is correct in the base class
+        // while avoiding matching CJK characters as word boundaries.
+        return "()";
+    }
+
     innerPattern() {
         // prettier-ignore
         return new RegExp(

src/locales/zh/hans/parsers/ZHHansDeadlineFormatParser.ts

@@ -17,6 +17,12 @@ const NUMBER_GROUP = 1;
 const UNIT_GROUP = 2;
 
 export default class ZHHansDeadlineFormatParser extends AbstractParserWithWordBoundaryChecking {
+    patternLeftBoundary(): string {
+        // Return a capturing group to ensure that the match index is correct in the base class
+        // while avoiding matching CJK characters as word boundaries.
+        return "()";
+    }
+
     innerPattern(): RegExp {
         return PATTERN;
     }

src/locales/zh/hant/parsers/ZHHantAgoFormatParser.ts

@@ -17,6 +17,12 @@ const NUMBER_GROUP = 1;
 const UNIT_GROUP = 2;
 
 export default class ZHHantAgoFormatParser extends AbstractParserWithWordBoundaryChecking {
+    patternLeftBoundary(): string {
+        // Return a capturing group to ensure that the match index is correct in the base class
+        // while avoiding matching CJK characters as word boundaries.
+        return "()";
+    }
+
     innerPattern(): RegExp {
         return PATTERN;
     }

src/locales/zh/hant/parsers/ZHHantDateParser.ts

@@ -7,6 +7,12 @@ const MONTH_GROUP = 2;
 const DAY_GROUP = 3;
 
 export default class ZHHantDateParser extends AbstractParserWithWordBoundaryChecking {
+    patternLeftBoundary(): string {
+        // Return a capturing group to ensure that the match index is correct in the base class
+        // while avoiding matching CJK characters as word boundaries.
+        return "()";
+    }
+
     innerPattern() {
         // prettier-ignore
         return new RegExp(

src/locales/zh/hant/parsers/ZHHantDeadlineFormatParser.ts

@@ -17,6 +17,12 @@ const NUMBER_GROUP = 1;
 const UNIT_GROUP = 2;
 
 export default class ZHHantDeadlineFormatParser extends AbstractParserWithWordBoundaryChecking {
+    patternLeftBoundary(): string {
+        // Return a capturing group to ensure that the match index is correct in the base class
+        // while avoiding matching CJK characters as word boundaries.
+        return "()";
+    }
+
     innerPattern(): RegExp {
         return PATTERN;
     }

test/zh/hans/zh_hans_ago.test.ts

@@ -56,3 +56,42 @@ test("Test - Simplified Chinese Ago Expression", function () {
         expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
     });
 });
+
+test("Test - Ago expression at the beginning of the text", function () {
+    // The leading Chinese numeral must not be consumed as a word boundary.
+    testSingleCase(chrono.zh.hans, "十五天前", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十五天前");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 6, 26, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hans, "二十天前", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("二十天前");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 6, 21, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hans, "三十分钟前", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("三十分钟前");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 7, 10, 11, 44);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hans, "十天前", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十天前");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 6, 31, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+});

test/zh/hans/zh_hans_date.test.ts

@@ -114,3 +114,43 @@ test("Test - Range Expression", function () {
         }
     });
 });
+
+test("Test - Date expression at the beginning of the text", function () {
+    // The leading Chinese numeral must not be consumed as a word boundary.
+    testSingleCase(chrono.zh.hans, "十一月十日", new Date(2012, 8 - 1, 10), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十一月十日");
+
+        expect(result.start).not.toBeNull();
+        expect(result.start.get("year")).toBe(2012);
+        expect(result.start.get("month")).toBe(11);
+        expect(result.start.get("day")).toBe(10);
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 11 - 1, 10, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hans, "十二月十日", new Date(2012, 8 - 1, 10), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十二月十日");
+
+        expect(result.start).not.toBeNull();
+        expect(result.start.get("year")).toBe(2012);
+        expect(result.start.get("month")).toBe(12);
+        expect(result.start.get("day")).toBe(10);
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 12 - 1, 10, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hans, "十月十日", new Date(2012, 8 - 1, 10), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十月十日");
+
+        expect(result.start).not.toBeNull();
+        expect(result.start.get("month")).toBe(10);
+        expect(result.start.get("day")).toBe(10);
+    });
+});

test/zh/hans/zh_hans_deadline.test.ts

@@ -173,3 +173,33 @@ test("Test - Untested suffix", function () {
         expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
     });
 });
+
+test("Test - Deadline expression at the beginning of the text", function () {
+    // The leading Chinese numeral must not be consumed as a word boundary.
+    testSingleCase(chrono.zh.hans, "十五天后", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十五天后");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 7, 25, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hans, "二十天后", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("二十天后");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 7, 30, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hans, "十天后", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十天后");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 7, 20, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+});

test/zh/hant/zh_hant_ago.test.ts

@@ -56,3 +56,42 @@ test("Test - Traditional Chinese Ago Expression", function () {
         expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
     });
 });
+
+test("Test - Ago expression at the beginning of the text", function () {
+    // The leading Chinese numeral must not be consumed as a word boundary.
+    testSingleCase(chrono.zh.hant, "十五天前", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十五天前");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 6, 26, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hant, "二十天前", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("二十天前");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 6, 21, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hant, "三十分鐘前", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("三十分鐘前");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 7, 10, 11, 44);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hant, "十天前", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十天前");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 6, 31, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+});

test/zh/hant/zh_hant_date.test.ts

@@ -114,3 +114,43 @@ test("Test - Range Expression", function () {
         }
     });
 });
+
+test("Test - Date expression at the beginning of the text", function () {
+    // The leading Chinese numeral must not be consumed as a word boundary.
+    testSingleCase(chrono.zh.hant, "十一月十日", new Date(2012, 8 - 1, 10), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十一月十日");
+
+        expect(result.start).not.toBeNull();
+        expect(result.start.get("year")).toBe(2012);
+        expect(result.start.get("month")).toBe(11);
+        expect(result.start.get("day")).toBe(10);
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 11 - 1, 10, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hant, "十二月十日", new Date(2012, 8 - 1, 10), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十二月十日");
+
+        expect(result.start).not.toBeNull();
+        expect(result.start.get("year")).toBe(2012);
+        expect(result.start.get("month")).toBe(12);
+        expect(result.start.get("day")).toBe(10);
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 12 - 1, 10, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hant, "十月十日", new Date(2012, 8 - 1, 10), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十月十日");
+
+        expect(result.start).not.toBeNull();
+        expect(result.start.get("month")).toBe(10);
+        expect(result.start.get("day")).toBe(10);
+    });
+});

test/zh/hant/zh_hant_deadline.test.ts

@@ -134,3 +134,33 @@ test("Test - Single Expression", function () {
         expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
     });
 });
+
+test("Test - Deadline expression at the beginning of the text", function () {
+    // The leading Chinese numeral must not be consumed as a word boundary.
+    testSingleCase(chrono.zh.hant, "十五天後", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十五天後");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 7, 25, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hant, "二十天後", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("二十天後");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 7, 30, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+
+    testSingleCase(chrono.zh.hant, "十天後", new Date(2012, 7, 10, 12, 14), (result) => {
+        expect(result.index).toBe(0);
+        expect(result.text).toBe("十天後");
+
+        const resultDate = result.start.date();
+        const expectDate = new Date(2012, 7, 20, 12);
+        expect(expectDate.getTime()).toBeCloseTo(resultDate.getTime());
+    });
+});