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diff --git a/tests/t0203-dates.sh b/tests/t0203-dates.sh
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+++ b/tests/t0203-dates.sh
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+#!/bin/sh
+
+test_description='Check the date display options'
+. ./setup.sh
+
+# An old commit and a fresh one, so a single log page exercises both the
+# relative rendering and the calendar fallback past the two week cutoff.
+test_expect_success 'set up a dated repo' '
+	mkrepo repos/dated 1 &&
+	(
+		cd repos/dated &&
+		GIT_AUTHOR_DATE="@1112911993 +0000" \
+		GIT_COMMITTER_DATE="@1112911993 +0000" \
+			git commit --allow-empty -m old &&
+		GIT_AUTHOR_DATE="@$(date +%s) +0000" \
+		GIT_COMMITTER_DATE="@$(date +%s) +0000" \
+			git commit --allow-empty -m fresh
+	)
+'
+
+# Each argument is written as one extra config line.
+daterc() {
+	{
+		echo "virtual-root=/"
+		echo "cache-size=0"
+		printf '%s\n' "$@"
+		echo "repo.url=dated"
+		echo "repo.path=$PWD/repos/dated/.git"
+	} >daterc
+}
+
+dateq() { CGIT_CONFIG="$PWD/daterc" QUERY_STRING="$1" cgit; }
+
+test_expect_success 'relative dates are on by default' '
+	daterc &&
+	dateq "url=dated/refs/" >tmp &&
+	grep "class=.age-" tmp
+'
+
+test_expect_success 'enable-relative-dates=0 shows a calendar date' '
+	daterc "enable-relative-dates=0" &&
+	dateq "url=dated/refs/" >tmp &&
+	! grep "class=.age-" tmp &&
+	grep "[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]<" tmp
+'
+
+test_expect_success 'the index and log columns follow the same flag' '
+	daterc "enable-relative-dates=0" &&
+	dateq "" >tmp &&
+	! grep "class=.age-" tmp &&
+	dateq "url=dated/log/" >tmp &&
+	! grep "class=.age-" tmp
+'
+
+test_expect_success 'date-format selects the calendar format' '
+	daterc "enable-relative-dates=0" "date-format=iso8601" &&
+	dateq "url=dated/refs/" >tmp &&
+	grep ">[0-9-]* [0-9][0-9]:[0-9][0-9]:[0-9][0-9] +0000<" tmp
+'
+
+test_expect_success 'date-format accepts a strftime format' '
+	daterc "enable-relative-dates=0" "date-format=format:%Y/%m/%d" &&
+	dateq "url=dated/refs/" >tmp &&
+	grep ">[0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9]<" tmp
+'
+
+test_expect_success 'an unknown date-format falls back to short' '
+	daterc "enable-relative-dates=0" "date-format=nonsense" &&
+	dateq "url=dated/refs/" >tmp &&
+	grep "[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]<" tmp &&
+	daterc "enable-relative-dates=0" "date-format=format:" &&
+	dateq "url=dated/refs/" >tmp &&
+	grep "[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]<" tmp
+'
+
+test_expect_success 'date-format still formats the log fallback' '
+	daterc "date-format=rfc2822" &&
+	dateq "url=dated/log/" >tmp &&
+	grep "class=.age-" tmp &&
+	grep ">[A-Z][a-z][a-z], [0-9]* Apr 2005 " tmp
+'
+
+test_expect_success 'date-format leaves the commit page on ISO 8601' '
+	daterc "date-format=rfc2822" &&
+	sha=$(git -C repos/dated rev-parse HEAD~1) &&
+	dateq "url=dated/commit/&id=$sha" >tmp &&
+	grep "2005-04-07 [0-9:]* +0000" tmp &&
+	! grep "Apr 2005" tmp
+'
+
+test_done