paraview: add simple validation test

This uses ParaView's `Examples` directory to test an installed ParaView.
Note that these are only really effective as of 5.11.0-RC2 due to
`Examples` having been untested from the top-level prior to this
(ParaView runs its example directories individually itself).

validation_tests/paraview/build/.gitignore

@@ -0,0 +1 @@
+paraview-examples/

validation_tests/paraview/clean.sh

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+#!/bin/bash
+
+. ./setup.sh
+
+# Remove the examples resources.
+rm -rf build/paraview-examples/

validation_tests/paraview/compile.sh

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+#!/bin/bash
+
+set -e
+
+#----------------------------------------
+# Variables for use later
+#----------------------------------------
+readonly workdir="build"
+paraview_version="$( spack find --format '{version}' "/${PARAVIEW_HASH}" )"
+readonly paraview_version
+paraview_variants="$( spack find --format '{variants}' "/${PARAVIEW_HASH}" )"
+readonly paraview_variants
+
+paraview_has_variant () {
+    local query="$1"
+    readonly query
+
+    shift
+
+    echo "$paraview_variants" | \
+        grep -q -e "+${query}\>"
+}
+
+if paraview_has_variant "shared"; then
+    paraview_is_shared=true
+else
+    paraview_is_shared=false
+fi
+readonly paraview_is_shared
+
+#----------------------------------------
+# ParaView upstream examples
+#----------------------------------------
+
+# First clone ParaView and run its examples.
+mkdir -p "$workdir/paraview-examples" # Must be removed in `clean.sh`
+pushd "$workdir/paraview-examples"
+# We do not need submodules. Also check out the version of ParaView the package
+# has to ensure that the examples agree.
+git clone --depth 1 -b "v${paraview_version}" https://gitlab.kitware.com/paraview/paraview.git src
+
+paraview_examples_src="$( pwd )/src"
+readonly paraview_examples_src
+
+readonly paraview_examples_args=(
+    "-DCMAKE_PREFIX_PATH=$paraview_ROOT"
+    "-DBUILD_SHARED_LIBS=$paraview_is_shared"
+    "$paraview_examples_src/Examples"
+)
+
+# Build with Ninja
+mkdir build-ninja
+pushd build-ninja
+cmake -G Ninja "${paraview_examples_args[@]}"
+cmake --build .
+popd
+
+# Build with Makefiles
+mkdir build-make
+pushd build-make
+cmake -G "Unix Makefiles" "${paraview_examples_args[@]}"
+cmake --build .
+popd
+popd

validation_tests/paraview/run.sh

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+#!/bin/bash
+
+set -e
+
+#----------------------------------------
+# Variables for use later
+#----------------------------------------
+readonly workdir="build"
+
+#----------------------------------------
+# ParaView upstream examples
+#----------------------------------------
+ctest --output-on-failure --test-dir "$workdir/paraview-examples/build-ninja"
+ctest --output-on-failure --test-dir "$workdir/paraview-examples/build-make"

validation_tests/paraview/setup.sh

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+#!/bin/bash
+. ../../setup.sh
+
+# Actually testing `paraview`
+spackLoadUnique paraview
+
+# Also need `cmake`, and `ninja` to build test tests.
+spackLoadUnique cmake
+spackLoadUnique ninja