From e5a3976c5a053ae681ec388308d95065e4e35498 Mon Sep 17 00:00:00 2001
From: e-nikolov <emil.e.nikolov@gmail.com>
Date: Mon, 4 Dec 2023 00:37:57 +0100
Subject: [PATCH] metric: fix precision format

---
 src/humanize/number.py |  2 +-
 tests/test_number.py   | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/humanize/number.py b/src/humanize/number.py
index 9329c28..034144a 100644
--- a/src/humanize/number.py
+++ b/src/humanize/number.py
@@ -562,7 +562,7 @@ def metric(value: float, unit: str = "", precision: int = 3) -> str:
         ordinal_ = "mμnpfazyrq"[(-exponent - 1) // 3]
     else:
         ordinal_ = ""
-    value_ = format(value, ".%if" % (precision - (exponent % 3) - 1))
+    value_ = format(value, ".%if" % max(0, precision - (exponent % 3) - 1))
     if not (unit or ordinal_) or unit in ("°", "′", "″"):
         space = ""
     else:
diff --git a/tests/test_number.py b/tests/test_number.py
index 9bb9475..00d9a9c 100644
--- a/tests/test_number.py
+++ b/tests/test_number.py
@@ -269,6 +269,27 @@ def test_clamp(test_args: list[typing.Any], expected: str) -> None:
         ([0.1, "°"], "100m°"),
         ([100], "100"),
         ([0.1], "100 m"),
+        ([1.5123, "", 0], "2"),
+        ([10.5123, "", 0], "11"),
+        ([10.5123, "", 1], "11"),
+        ([10.5123, "", 2], "11"),
+        ([10.5123, "", 3], "10.5"),
+        ([1, "", 0], "1"),
+        ([10, "", 0], "10"),
+        ([100, "", 0], "100"),
+        ([1000, "", 0], "1 k"),
+        ([1, "", 1], "1"),
+        ([10, "", 1], "10"),
+        ([100, "", 1], "100"),
+        ([1000, "", 1], "1 k"),
+        ([1, "", 2], "1.0"),
+        ([10, "", 2], "10"),
+        ([100, "", 2], "100"),
+        ([1000, "", 2], "1.0 k"),
+        ([1, "", 3], "1.00"),
+        ([10, "", 3], "10.0"),
+        ([100, "", 3], "100"),
+        ([1000, "", 3], "1.00 k"),
         ([math.nan], "NaN"),
         ([math.nan, "m"], "NaN"),
         ([math.inf], "+Inf"),