Feature t minus check (#116)

* Added new checks for date validation

* Added test cases for t-minus check

README.md

@@ -196,6 +196,12 @@ Check | Description | DataType
 `is_inside_interquartile_range` | Verifies column values reside inside limits of interquartile range `Q1 <= col <= Q3` used on anomalies.  | _numeric_
 `is_in_millions` | `col >= 1e6` | _numeric_
 `is_in_billions` | `col >= 1e9` | _numeric_
+`is_t_minus_1` | For date fields confirms 1 day ago `t-1` | _date_
+`is_t_minus_2` | For date fields confirms 2 days ago `t-2` | _date_
+`is_t_minus_3` | For date fields confirms 3 days ago `t-3` | _date_
+`is_t_minus_n` | For date fields confirms n days ago `t-n` | _date_
+`is_today` | For date fields confirms day is current date `t-0` | _date_
+`is_yesterday` | For date fields confirms 1 day ago `t-1` | _date_
 `is_on_weekday` | For date fields confirms day is between `Mon-Fri` | _date_
 `is_on_weekend` | For date fields confirms day is between `Sat-Sun` | _date_
 `is_on_monday` | For date fields confirms day is `Mon` | _date_

cuallee/__init__.py

@@ -5,7 +5,7 @@
 import operator
 from collections import Counter
 from dataclasses import dataclass, field
-from datetime import datetime
+from datetime import datetime, timedelta
 from types import ModuleType
 from typing import Any, Dict, List, Literal, Optional, Protocol, Tuple, Union
 from numbers import Number
@@ -363,6 +363,31 @@ def is_contained_in(
     def is_in(self, column: str, value: Tuple[str, int, float], pct: float = 1.0):
         """Vaidation of column value in set of given values"""
         return self.is_contained_in(column, value, pct)
+
+    def is_t_minus_n(self, column: str, value: int, pct: float = 1.0):
+        """Validate that date is yesterday"""
+        yesterday = datetime.utcnow() - timedelta(days=value)
+        return self.is_in(column, tuple([yesterday.strftime("%Y-%m-%d")]), pct)
+
+    def is_t_minus_1(self, column: str, pct: float = 1.0):
+        """Validate that date is yesterday"""
+        return self.is_t_minus_n(column, 1, pct)
+
+    def is_t_minus_2(self, column: str, pct: float = 1.0):
+        """Validate that date is 2 days ago"""
+        return self.is_t_minus_n(column, 2, pct)
+
+    def is_t_minus_3(self, column: str, pct: float = 1.0):
+        """Validate that date is 3 days ago"""
+        return self.is_t_minus_n(column, 3, pct)
+
+    def is_yesterday(self, column: str, pct: float = 1.0):
+        """Validate that date is yesterday"""
+        return self.is_t_minus_1(column, pct)
+
+    def is_today(self, column: str, pct: float = 1.0):
+        """Validate that date is today"""
+        return self.is_t_minus_n(column, 0, pct)
 
     def has_percentile(
         self, column: str, value: float, percentile: float, precision: int = 10000

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "cuallee"
-version = "0.5.0"
+version = "0.5.1"
 authors = [
   { name="Virginie Grosboillot", email="[email protected]" },
   { name="Herminio Vazquez", email="[email protected]"}

setup.cfg

@@ -1,5 +1,5 @@
 [metadata]
 name = cuallee
-version = 0.5.0
+version = 0.5.1
 [options]
 packages = find: