Basic setup for tests

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

.gitignore

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+test/assert.sh
+test/stub.sh

.travis.yml

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+language: bash
+script: make test
+before_install:
+    - sudo apt-get install bc

Makefile

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+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

test.sh

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+#! /usr/bin/env bash
+
+resolve_link() {
+  $(type -p greadlink readlink | head -1) $1
+}
+
+abs_dirname() {
+  local cwd="$(pwd)"
+  local path="$1"
+
+  while [ -n "$path" ]; do
+    cd "${path%/*}"
+    local name="${path##*/}"
+    path="$(resolve_link "$name" || true)"
+  done
+
+  pwd
+  cd "$cwd"
+}
+
+
+testdir="$(abs_dirname "$0")/test"
+testfiles="$(find "$testdir" -name "*-test.sh")"
+
+RET=0
+for testfile in $testfiles; do
+  echo ""
+  echo "running: ${testfile/#$(dirname "$testdir")\//}"
+  cd "$(dirname "$testfile")"
+  "$testfile"
+  if [ "$?" != "0" ]; then RET=1; fi
+done
+echo ""
+exit $RET

test/test-helper.sh

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+[ -n "$TEST_DEBUG" ] && set -x
+
+# Set testroot variable.
+testroot="$(dirname "$BASH_SOURCE")"
+
+# Include assert.sh and stub.sh libraries.
+source "${testroot}/assert.sh"
+source "${testroot}/stub.sh"