fq: Add cli sanity test

Makefile

@@ -8,7 +8,7 @@ fq:
 .PHONY: test
 # figure out all go pakges with test files
 test: PKGS=$(shell find . -name "*_test.go" | xargs -n 1 dirname | sort | uniq)
-test: testjq
+test: testjq testfqbin
 	go test ${VERBOSE} ${COVER} ${PKGS}
 
 testwrite: export WRITE_ACTUAL=1
@@ -29,6 +29,10 @@ testjq:
 		go run main.go -L "$$(dirname $$f)" -f "$$f" -n -r ; \
 	done
 
+.PHONY: testfqbin
+testfqbin:
+	dev/fqbin-test.sh
+
 .PHONY: doc
 doc: doc/file.mp3 doc/file.mp4
 	$(eval REPODIR=$(shell pwd))

dev/fqbin-test.exp

@@ -0,0 +1,28 @@
+#!/usr/bin/env expect
+# TODO: move this script somehwere else
+# TODO: run without NODECODEPROGRESS
+
+log_user 1
+set timeout 1
+
+expect_after {
+    timeout {exit 1}
+}
+
+spawn sh -c "NODECODEPROGRESS=1 fq -o color=false -i . pkg/interp/testdata/test.mp3 2>&1"
+
+expect "mp3> "
+
+send ".\n"
+expect "footers"
+expect "mp3> "
+
+send ".frames | mp3_fr\t"
+expect "mp3_frame"
+send "\n"
+expect "side_info"
+
+# ctrl-d
+send "\x04"
+
+expect eof

dev/fqbin-test.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+if which expect >/dev/null 2>&1; then
+    TEMPDIR=$(mktemp -d)
+    go build -o "${TEMPDIR}/fq" main.go
+    PATH="${TEMPDIR}:${PATH}" expect dev/fqbin-test.exp >"${TEMPDIR}/fq.log"
+    EXIT="$?"
+    if [ $EXIT != "0" ]; then
+        cat "${TEMPDIR}/fq.log"
+    fi
+    rm -rf "${TEMPDIR}"
+    if [ $EXIT != "0" ]; then
+        exit 1
+    fi
+else
+    echo "fq-test.sh: skip as expect is not installed"
+fi