add tests, including some failing tests that catch edge cases I need to fix

.sig/manifest.8E47A1EC35A1551D.asc

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.sig/manifest.txt

@@ -1,7 +1,7 @@
 64263feac7b00952e9ec3b6c1fd11316faa58ff673c6bd085fac9f6f8d8389f6 .gitignore
-6be935105cf23a76df12868caf56e52f95f1b9fc64645b1079eb7a07cc8682a3 Makefile
+71be2fa2aadd9c8f77355ed17e4e246ca07d38e0e9d1f4324181c89695e82eb4 Makefile
 f19d267e4aa6bf82d5416891697a2a81a574efdddecf5c54e3a8a77c207013fa README.md
 bf3492ca7625d9ac199678cf2828253e5968a87c5c444ec92e2a90ed1cbbac49 sig
-fe58cbd410c8fe1c3086447b6a0187d6f42b536ab34347e523373a9e92a9421b test/Dockerfile
-1f2cfe885b4134129f5d67669e6f6f432194fff787117f5cb4297fddb58d6e16 test/test.bats
-4e87988899634e85354372f18b26d778a5f60f921ebee1b8c543477ce9787aa3 test/test_helper.bash
+f2277f49854ad048ab66f890c01d43476aada9ee2aca7a688d4ea9fd6c0f8d2a test/Dockerfile
+ede387dce19cb471142b0bd914d4f7f99af26624080b92cb18328ece2cdfb191 test/test.bats
+c9c68b5bd5c4a62818d36731eb5a0c359474837e0e4cfe19d6ac48d15d920002 test/test_helper.bash

Makefile

@@ -3,9 +3,9 @@ test: test-image
 	docker run \
 		--rm \
 		--interactive \
-		--volume $(PWD)/:/home/test/ \
+		--volume $(PWD)/:/home/test/sig \
 		local/sig-test \
-		bats test/test.bats
+		bats sig/test/test.bats
 
 .PHONY: test-image
 test-image:
@@ -19,6 +19,6 @@ test-shell: test-shell
 	docker run \
 		--rm \
 		--interactive \
-		--volume $(PWD)/:/home/test/ \
+		--volume $(PWD)/:/home/test/sig \
 		local/sig-test \
 		bash

test/Dockerfile

@@ -1,7 +1,7 @@
 FROM debian:buster
 
 RUN apt-get update && \
-    apt-get install -y --force-yes bats gnupg openssl && \
+    apt-get install -y --force-yes bats git gnupg openssl && \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 RUN useradd -m test

test/test.bats

@@ -1,20 +1,65 @@
 load test_helper
 
 @test "Outputs help if run without arguments" {
-	run ./sig
+	run sig
 	[ "$status" -eq 0 ]
 	echo "${output}" | grep "simple multisig trust toolchain"
 }
 
 @test "Outputs help if run with help" {
-	run ./sig help
+	run sig help
 	[ "$status" -eq 0 ]
 	echo "${output}" | grep "simple multisig trust toolchain"
 }
 
-
 @test "Outputs version if run with version" {
-	run ./sig version
+	run sig version
 	[ "$status" -eq 0 ]
 	echo "${output}" | grep "v0.0.1"
 }
+
+@test "Outputs advice to install missing openssl" {
+	mask_command openssl
+	run sig version
+	echo "${output}" | grep "apt install openssl"
+}
+
+@test "Outputs advice to install missing gpg" {
+	mask_command gpg
+	run sig version
+	echo "${output}" | grep "apt install gnupg"
+}
+
+@test "Outputs advice to install missing getopt" {
+	mask_command getopt
+	run sig version
+	echo "${output}" | grep "apt install getopt"
+}
+
+@test "Can generate manifest for folder with git installed" {
+	echo "test string" > somefile
+	sig manifest
+	run grep 37d2046a395cbfc .sig/manifest.txt
+	[ "$status" -eq 0 ]
+}
+
+@test "Can generate manifest for folder with git not installed" {
+	mask_command git
+	echo "test string" > somefile
+	sig manifest
+	run grep 37d2046a395cbfc .sig/manifest.txt
+	[ "$status" -eq 0 ]
+}
+
+@test "Can generate manifest for git repo" {
+	set_identity "user1"
+	echo "test string" > somefile
+	git init
+	git add .
+	git commit -m "initial commit"
+	sig manifest
+	run grep -q "1" <(wc -l .sig/manifest.txt)
+	[ "$status" -eq 0 ]
+	run grep 37d2046a395cbfc .sig/manifest.txt
+	[ "$status" -eq 0 ]
+}

test/test_helper.bash

@@ -1,10 +1,29 @@
 #!/bin/bash
 
 setup(){
-	echo "running setup"
+	bin_dir=/tmp/bin
+	temp_dir=$(mktemp -d -t test-XXXXXXXXXX)
+	mkdir -p /tmp/bin
+	cp /home/test/sig/sig /tmp/bin/sig
+	export PATH=${bin_dir}:${PATH}
+	cd "$temp_dir" || return 1
 }
 
 teardown(){
-	echo "running teardown"
+	rm -rf "$temp_dir"
 }
 
+set_identity(){
+	local -r name="${1?}"
+	echo "set key to $name"
+	git config --global user.email "${name}@example.com"
+	git config --global user.name "${name}"
+}
+
+mask_command(){
+	local -r command="${1?}"
+	echo "echo >&2 \"bash: ${command}: command not found\" && exit 127" \
+		> "${command}"
+	chmod +x "${command}"
+	export PATH="$PWD:$PATH" "${command}"
+}