Add stub_called_at_most_times function

stub.sh

@@ -166,6 +166,23 @@ stub_called_at_least_times() {
 }
 
 
+# Public: Find out of stub has been called no more than the given number of
+# times.
+#
+# Arguments:
+#   - $1: Name of stubbed command.
+#   - $2: Minimum required number of times stub has been called.
+#
+# Echoes nothing.
+# Returns 0 (success) if stub has been called no more than the given number of
+# times, otherwise 1 (error) is returned.
+stub_called_at_most_times() {
+  if [ "$(stub_called_times "$1")" -gt "$2" ]; then
+    return 1
+  fi
+}
+
+
 # Public: Restore the original command/function that was stubbed.
 #
 # Arguments:

test/stub_called_at_most_times-test.sh

@@ -0,0 +1,33 @@
+#! /usr/bin/env bash
+source "test-helper.sh"
+
+#
+# stub_called_at_most_times() tests.
+#
+
+# Setup
+stub "uname"
+uname
+uname
+uname
+
+# Returns 0 when stub called no more than given number of times.
+assert_raises 'stub_called_at_most_times "uname" 5' 0
+assert_raises 'stub_called_at_most_times "uname" 4' 0
+assert_raises 'stub_called_at_most_times "uname" 3' 0
+
+# Returns 1 when stub has been called more than given number of times.
+assert_raises 'stub_called_at_most_times "uname" 2' 1
+assert_raises 'stub_called_at_most_times "uname" 1' 1
+assert_raises 'stub_called_at_most_times "uname" 0' 1
+
+# Behaves as if stub has not been called when the stub doesn't exist.
+assert_raises 'stub_called_at_most_times "top" 0' 0
+assert_raises 'stub_called_at_most_times "top" 1' 0
+
+# Teardown
+restore "uname"
+
+
+# End of tests.
+assert_end "stub_called_at_most_times()"