Basic setup for tests

Based on the test setup of stub.sh: https://github.com/jimeh/stub.sh

Makefile

@@ -0,0 +1,37 @@
+test: prepare
+	./test.sh
+
+prepare: test/assert.sh test/stub.sh
+
+test/assert.sh:
+	test -f "test/assert.sh" || ( \
+		echo "fetching test/assert.sh..." && \
+		curl -s -L -o 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"
+
+test/stub.sh:
+	test -f "test/stub.sh" || ( \
+		echo "fetching test/stub.sh..." && \
+		curl -s -L -o test/stub.sh \
+			https://raw.github.com/jimeh/stub.sh/v0.3.0/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"
+
+.SILENT:
+.PHONY: test prepare \
+	test/assert.sh update-assert.sh remove-assert.sh \
+	test/stub.sh update-stub.sh remove-stub.sh