Add test/3pdata/tgasuite
Updates #67
diff --git a/test/3pdata/fetch-tgasuite.sh b/test/3pdata/fetch-tgasuite.sh
new file mode 100755
index 0000000..a615e9f
--- /dev/null
+++ b/test/3pdata/fetch-tgasuite.sh
@@ -0,0 +1,35 @@
+#!/bin/bash -eu
+# Copyright 2022 The Wuffs Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# ----------------
+
+# This script fetches the TrueVision TGA test suite.
+
+if [ ! -e ../../wuffs-root-directory.txt ]; then
+ echo "$0 should be run from the Wuffs test/3pdata directory."
+ exit 1
+fi
+
+# Check out a specific commit (from January 2022).
+git clone --quiet https://github.com/image-rs/image.git
+cd image
+git reset --quiet --hard 2e1d2e5928077eae7a92f8b5cac83ca1ae0db0cd
+cd ..
+
+# Copy out the *.tga files.
+mkdir -p tgasuite
+cp image/tests/images/tga/testsuite/*.tga tgasuite
+cp image/tests/regression/tga/*.tga tgasuite
+rm -rf image
diff --git a/test/3pdata/nia-checksums-of-tgasuite.txt b/test/3pdata/nia-checksums-of-tgasuite.txt
new file mode 100644
index 0000000..4c63650
--- /dev/null
+++ b/test/3pdata/nia-checksums-of-tgasuite.txt
@@ -0,0 +1 @@
+# Generated by script/print-nia-checksums.sh
