[PATCH 1/6] test: define a helper function for defining prereqs on executables

[Thomas Jost]

While test_expect_success could be used to define these prereqs, this is
probably not a good idea: if a prereq is not available, using
test_expect_success would result in a test being reported as FAILED at the end
of the test suite (and its dependencies as skipped).

(Thanks to Pieter Praet for suggesting the use of "hash" instead of "which".)
---
 test/test-lib.sh |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/test/test-lib.sh b/test/test-lib.sh
index 1ea7fa9..382934f 100755
--- a/test/test-lib.sh
+++ b/test/test-lib.sh
@@ -543,6 +543,19 @@ test_have_prereq () {
 	esac
 }
 
+test_set_bin_prereq () {
+	bin=$1
+	name=$2
+	prereq=$3
+	if hash $bin &>/dev/null
+	then
+		test_set_prereq $prereq
+	else
+		say_color info "%-6s" "INFO"
+		echo " Missing test prerequisite: $name"
+	fi
+}
+
 # You are not expected to call test_ok_ and test_failure_ directly, use
 # the text_expect_* functions instead.
 
-- 
1.7.7.3