From 201f96741143b25530b18d74b616130ce1fd96f6 Mon Sep 17 00:00:00 2001
From: Simon Michael <simon@joyful.com>
Date: Wed, 3 Feb 2021 18:11:44 -0800
Subject: [PATCH] print: show all decimal places in assertion/assignment
 amounts (#1465)

Overriding the commodity style, per https://hledger.org/hledger.html#commodity-display-style.
---
 hledger-lib/Hledger/Data/Journal.hs               |  3 ++-
 hledger/test/journal/amounts-and-commodities.test | 15 +++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/hledger-lib/Hledger/Data/Journal.hs b/hledger-lib/Hledger/Data/Journal.hs
index 732e9034e..4929407bd 100644
--- a/hledger-lib/Hledger/Data/Journal.hs
+++ b/hledger-lib/Hledger/Data/Journal.hs
@@ -981,7 +981,8 @@ journalApplyCommodityStyles j@Journal{jtxns=ts, jpricedirectives=pds} =
         fixtransaction t@Transaction{tpostings=ps} = t{tpostings=map fixposting ps}
         fixposting p = p{pamount=styleMixedAmount styles $ pamount p
                         ,pbalanceassertion=fixbalanceassertion <$> pbalanceassertion p}
-        fixbalanceassertion ba = ba{baamount=styleAmount styles $ baamount ba}
+        -- balance assertion amounts are always displayed, eg by print, at full precision, per docs
+        fixbalanceassertion ba = ba{baamount=setFullPrecision $ styleAmount styles $ baamount ba}
         fixpricedirective pd@PriceDirective{pdamount=a} = pd{pdamount=styleAmountExceptPrecision styles a}
 
 -- | Get the canonical amount styles for this journal, whether (in order of precedence):
diff --git a/hledger/test/journal/amounts-and-commodities.test b/hledger/test/journal/amounts-and-commodities.test
index 8d84e9ec8..add90b0e3 100644
--- a/hledger/test/journal/amounts-and-commodities.test
+++ b/hledger/test/journal/amounts-and-commodities.test
@@ -195,3 +195,18 @@ $ hledger -f - print
     (b)          2.00 $
 
 >=
+
+# Balance assertion amounts are always displayed at their full precision,
+# overriding commodity styles. (#1465)
+<
+commodity A 1.
+
+2021-01-01
+  (a)   0.001A
+  (a)   1.122A = 1.123A
+$ hledger -f - print
+2021-01-01
+    (a)               0
+    (a)             A 1 = A 1.123
+
+>=