Use test-runner.sh instead of homegrown test.sh

Makefile

@@ -1,7 +1,24 @@
-test: prepare
-	./test.sh
+test: bootstrap
+	./test-runner.sh
 
-prepare: test/assert.sh test/stub.sh
+bootstrap: test-runner.sh test/assert.sh test/stub.sh
+
+clean: remove-test-runner.sh remove-assert.sh remove-stub.sh
+
+test-runner.sh:
+	test -f "test-runner.sh" || \
+		echo "fetching test-runner.sh..." && \
+		curl -s -L -o test-runner.sh \
+			https://github.com/jimeh/test-runner.sh/raw/v0.1.0/test-runner.sh && \
+		chmod +x test-runner.sh
+
+remove-test-runner.sh:
+	( \
+		test -f "test-runner.sh" && rm "test-runner.sh" && \
+		echo "removed test-runner.sh"\
+	) || exit 0
+
+update-test-runner.sh: remove-test-runner.sh test-runner.sh
 
 test/assert.sh:
 	test -f "test/assert.sh" || ( \
@@ -10,13 +27,13 @@ test/assert.sh:
 			https://raw.github.com/lehmannro/assert.sh/v1.0.2/assert.sh \
 	)
 
-update-assert.sh: remove-assert.sh test/assert.sh
-
 remove-assert.sh:
 	test -f "test/assert.sh" && \
 		rm "test/assert.sh" && \
 		echo "removed test/assert.sh"
 
+update-assert.sh: remove-assert.sh test/assert.sh
+
 test/stub.sh:
 	test -f "test/stub.sh" || ( \
 		echo "fetching test/stub.sh..." && \
@@ -24,14 +41,15 @@ test/stub.sh:
 			https://raw.github.com/jimeh/stub.sh/v1.0.1/stub.sh \
 	)
 
-update-stub.sh: remove-stub.sh test/stub.sh
-
 remove-stub.sh:
 	test -f "test/stub.sh" && \
 		rm "test/stub.sh" && \
 		echo "removed test/stub.sh"
 
+update-stub.sh: remove-stub.sh test/stub.sh
+
 .SILENT:
-.PHONY: test prepare \
-	test/assert.sh update-assert.sh remove-assert.sh \
-	test/stub.sh update-stub.sh remove-stub.sh
+.PHONY: test bootstrap clean \
+	test-runner.sh remove-test-runner.sh update-test-runner.sh \
+	test/assert.sh remove-assert.sh      update-assert.sh \
+	test/stub.sh   remove-stub.sh        update-stub.sh