Add tests

README.md

@@ -2,6 +2,7 @@ mkx
 ===
 
 - [Formerly _mksh_](#formerly-mksh)
+- [Tests](#tests)
 
 ```
 mkx 2.3.0
@@ -29,3 +30,9 @@ OPTIONS:
 As the name _mksh_ is more commonly associated with the [MirBSD Korn Shell](https://www.mirbsd.org/mksh.htm), this repo has been renamed from _mksh_ to _mkx_. The same goes for the namesake script within.
 
 Invoking `mksh` with `mkx` used to be the equivalent of `mksh -b` or `mksh -i <interpreter>`. But the with this name change, `mkx` was now made to work like `mksh`.
+
+## Tests
+
+Tests are written in [Bats](https://bats-core.readthedocs.io/en/stable/).
+
+To run them, install Bats and run `bats tests` in the project root directory.

tests/mkx.bats

@@ -0,0 +1,71 @@
+#!/usr/bin/env bats
+
+teardown() {
+	[ -z "$OUTPUT_FILE" ] && return 0
+	[ ! -f "$OUTPUT_FILE" ] && return 0
+	rm -f "$OUTPUT_FILE"
+}
+
+@test "shows version" {
+	local version="$( grep VERSION ./mkx | grep -o '[0-9]\+\.[0-9]\+\.[0-9]\+' )"
+
+	run ./mkx -v
+
+	[ "$status" -eq 0 ]
+	[ "$output" = "mkx $version" ]
+}
+
+@test "shows help" {
+	run ./mkx -h
+
+	[ "$status" -eq 0 ]
+	[ "${output:0:4}" = "mkx " ]
+}
+
+@test "generates script from default template" {
+	OUTPUT_FILE="$(mktemp)"
+	rm -f "$OUTPUT_FILE"
+	run ./mkx "$OUTPUT_FILE"
+
+	[ "$status" -eq 0 ]
+	[ "$( head -n 1 "$OUTPUT_FILE" )" = "#!/usr/bin/env bash" ]
+	[ "$( wc -l < "$OUTPUT_FILE" )" -gt 2 ]
+	[ -x "$OUTPUT_FILE" ]
+	[ -f "$OUTPUT_FILE" ]
+}
+
+@test "generates script from custom template" {
+	OUTPUT_FILE="$(mktemp)"
+	rm -f "$OUTPUT_FILE"
+	run ./mkx -t default "$OUTPUT_FILE"
+
+	[ "$status" -eq 0 ]
+	[ "$( head -n 1 "$OUTPUT_FILE" )" = "#!/usr/bin/env bash" ]
+	[ "$( wc -l < "$OUTPUT_FILE" )" -gt 2 ]
+	[ -x "$OUTPUT_FILE" ]
+	[ -f "$OUTPUT_FILE" ]
+}
+
+@test "generates bare script" {
+	OUTPUT_FILE="$(mktemp)"
+	rm -f "$OUTPUT_FILE"
+	run ./mkx -b "$OUTPUT_FILE"
+
+	[ "$status" -eq 0 ]
+	[ "$( head -n 1 "$OUTPUT_FILE" )" = "#!/usr/bin/env bash" ]
+	[ "$( wc -l < "$OUTPUT_FILE" )" -eq 2 ]
+	[ -x "$OUTPUT_FILE" ]
+	[ -f "$OUTPUT_FILE" ]
+}
+
+@test "generates base script with /bin/sh as interpreter" {
+	OUTPUT_FILE="$(mktemp)"
+	rm -f "$OUTPUT_FILE"
+	run ./mkx -s "$OUTPUT_FILE"
+
+	[ "$status" -eq 0 ]
+	[ "$( head -n 1 "$OUTPUT_FILE" )" = "#!/bin/sh" ]
+	[ "$( wc -l < "$OUTPUT_FILE" )" -eq 2 ]
+	[ -x "$OUTPUT_FILE" ]
+	[ -f "$OUTPUT_FILE" ]
+}