Add tests (idaholab#19001)

test/tests/misc/hit_cli/gold/positive_pattern

@@ -0,0 +1,2 @@
+input1.i:9 Kernels/diff_u/variable = u
+1 match found.

test/tests/misc/hit_cli/hit_wrapper.py

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+#!/usr/bin/env python3
+
+import sys
+import os
+import subprocess
+
+if len(sys.argv) < 2:
+    print("Usage:\nhit_wrapper.py gold_output [hit arguments]\n")
+
+MOOSE_DIR = os.getenv('MOOSE_DIR', os.path.abspath(os.path.join(os.path.dirname(os.path.realpath(__file__)), '..', '..', '..', '..')))
+hit = os.path.join(MOOSE_DIR, 'framework', 'contrib', 'hit', 'hit')
+if not os.path.exists(hit):
+    print('Failed to locate hit executable.')
+    sys.exit(1)
+
+gold_file = sys.argv[1]
+hit_args = sys.argv[2:]
+
+with open(gold_file, 'rb') as f:
+    gold = f.read()
+
+out = subprocess.check_output([hit] + hit_args)
+
+if out == gold:
+    sys.exit(0)
+
+print("Output:\n", out, "\ndoes not match gold:\n", gold)
+sys.exit(1)

test/tests/misc/hit_cli/input1.i

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+#
+# This is not a valid MOOSE input, it is only used for testing the HIT command
+# line utility.
+#
+
+[Kernels]
+  [diff_u]
+    type = Diffusion
+    variable = u
+  []
+  [diff_v]
+    type = Diffusion
+    variable = v
+  []
+[]
+
+[BCs]
+  [left]
+    type = DirichletBC
+    variable = u
+    value = 0
+  []
+  [right]
+    type = NeumannBC
+    variable = v
+    value = 0
+  []
+[]

test/tests/misc/hit_cli/tests

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+[Tests]
+  [positive_pattern]
+    type = RunCommand
+    command = ./hit_wrapper.py gold/positive_pattern find Kernels/\*/variable=u input1.i'
+  []
+  [negative_pattern]
+    type = RunCommand
+    command = ./hit_wrapper.py gold/positive_pattern find Kernels/\*/variable!=v input1.i'
+  []
+[]