tests: add integration tests

tests/CMakeLists.txt

@@ -1 +1,2 @@
+add_subdirectory(integration)
 add_subdirectory(unit)

tests/integration/CMakeLists.txt

@@ -0,0 +1,13 @@
+find_program(BASH_PROGRAM bash)
+
+if (BASH_PROGRAM)
+
+add_test(test_output
+  ${BASH_PROGRAM}
+  ${CMAKE_CURRENT_SOURCE_DIR}/test-output.sh
+  ${CMAKE_SOURCE_DIR}/data/
+  # FIXME: can't get it working $<TARGET_FILE:kraken>
+  ${CMAKE_BINARY_DIR}/src/kraken
+)
+
+endif (BASH_PROGRAM)

tests/integration/test-output.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+if [ $# != 0 ]; then
+    DATA_DIR="$1"
+    KRAKEN="$2"
+else
+    DATA_DIR=data/
+    KRAKEN=build/src/kraken
+fi
+
+if ! [ -x "$KRAKEN" ] || ! [ -d "$DATA_DIR" ]; then
+    printf 'KRAKEN ('\''%s'\'') or DATA_DIR ('\''%s'\'') incorrectly set\n' "$KRAKEN" "$DATA_DIR"
+    exit 1
+fi
+
+FAILURES=0
+SUCCESSES=0
+
+# $1: should be the name of the input/output files couple, stripped of
+# the data path prefix, or the `{in,out}.csv` suffix.
+test_file() {
+    if ! diff="$(diff <("$KRAKEN" < "$DATA_DIR/inputs/$1.in.csv") "$DATA_DIR/outputs/$1.out.csv")"; then
+        ((FAILURES += 1))
+        echo "$1: FAIL"
+        if [ -n "$VERBOSE" ]; then
+            printf '%s\n' "$diff"
+        fi
+    else
+        ((SUCCESSES += 1))
+        echo "$1: OK"
+    fi
+}
+
+for test_name in "$DATA_DIR"/inputs/*.in.csv; do
+    test_name="$(basename "$test_name")"
+    test_name="${test_name%%.in.csv}"
+
+    test_file "$test_name"
+done
+
+printf '\nSummary: %d successes, %d failures\n' "$SUCCESSES" "$FAILURES"
+
+exit "$((FAILURES != 0))"