From e344a3027b7cd5d6510cda8c9d80527de11e24f4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= <essen@ninenines.eu>
Date: Mon, 14 May 2018 13:55:30 +0200
Subject: Don't run cover when there's no ebin files in the directory

---
 test/plugin_cover.mk | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

(limited to 'test')

diff --git a/test/plugin_cover.mk b/test/plugin_cover.mk
index c9ba3d7..a4accd1 100644
--- a/test/plugin_cover.mk
+++ b/test/plugin_cover.mk
@@ -1,6 +1,6 @@
 # Common Test plugin.
 
-COVER_CASES = ct custom-dir eunit report-and-merge
+COVER_CASES = ct custom-dir eunit eunit-apps-only report-and-merge
 COVER_TARGETS = $(addprefix cover-,$(COVER_CASES))
 
 .PHONY: cover $(COVER_TARGETS)
@@ -115,6 +115,33 @@ cover-eunit: build clean
 	$t $(MAKE) -C $(APP) clean $v
 	$t test ! -e $(APP)/eunit.coverdata
 
+cover-eunit-apps-only: build clean
+
+	$i "Create a multi application repository with no root application"
+	$t mkdir $(APP)/
+	$t cp ../erlang.mk $(APP)/
+	$t echo "include erlang.mk" > $(APP)/Makefile
+
+	$i "Create a new application named my_app"
+	$t $(MAKE) -C $(APP) new-app in=my_app $v
+
+	$i "Generate a module containing EUnit tests in my_app"
+	$t printf "%s\n" \
+		"-module(my_app)." \
+		"-ifdef(TEST)." \
+		"-include_lib(\"eunit/include/eunit.hrl\")." \
+		"ok_test() -> ok." \
+		"-endif." > $(APP)/apps/my_app/src/my_app.erl
+
+	$i "Run EUnit with code coverage enabled"
+	$t $(MAKE) -C $(APP) eunit COVER=1 $v
+
+	$i "Check that no file was generated in the top-level directory"
+	$t ! test -f $(APP)/eunit.coverdata
+
+	$i "Check that the generated file exists"
+	$t test -f $(APP)/apps/my_app/eunit.coverdata
+
 cover-report-and-merge: build clean
 
 	$i "Bootstrap a new OTP application named $(APP)"
-- 
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