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[template-glib] tests: add test for template expansion

commit b0b4e1aa6eb54f77fe5a6ee63f2af0c4aa864f30
Author: Christian Hergert <chergert redhat com>
Date:   Wed May 4 12:04:37 2022 -0700

    tests: add test for template expansion

 tests/meson.build                       |  1 +
 tests/test-template-test1.tmpl          | 12 +++++
 tests/test-template-test1.tmpl.expected |  8 ++++
 tests/test-template.c                   | 83 +++++++++++++++++++++++++++++++++
 4 files changed, 104 insertions(+)
---
diff --git a/tests/meson.build b/tests/meson.build
index ef60d90..4cb5017 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -14,6 +14,7 @@ testsuite_c_args = [
 
 testsuite_sources = [
   ['test-expr'],
+  ['test-template'],
 ]
 
 foreach test: testsuite_sources
diff --git a/tests/test-template-test1.tmpl b/tests/test-template-test1.tmpl
new file mode 100644
index 0000000..ce09fa6
--- /dev/null
+++ b/tests/test-template-test1.tmpl
@@ -0,0 +1,12 @@
+<html>
+ <head>
+  <title>{{title}}</title>
+ </head>
+ <body>
+{{if title}}
+  <h1>{{title}}</h1>
+{{else}}
+  <h1>Untitled</h1>
+{{end}}
+ </body>
+</html>
diff --git a/tests/test-template-test1.tmpl.expected b/tests/test-template-test1.tmpl.expected
new file mode 100644
index 0000000..5d78fde
--- /dev/null
+++ b/tests/test-template-test1.tmpl.expected
@@ -0,0 +1,8 @@
+<html>
+ <head>
+  <title>My Title</title>
+ </head>
+ <body>
+  <h1>My Title</h1>
+ </body>
+</html>
diff --git a/tests/test-template.c b/tests/test-template.c
new file mode 100644
index 0000000..ffa3192
--- /dev/null
+++ b/tests/test-template.c
@@ -0,0 +1,83 @@
+/* test-template.c
+ *
+ * Copyright 2022 Christian Hergert <chergert redhat com>
+ *
+ * This file is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * This file is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
+#include <tmpl-glib.h>
+
+static char *
+get_file_contents (GFile *file)
+{
+  char *ret = NULL;
+  gsize len;
+
+  if (!g_file_load_contents (file, NULL, &ret, &len, NULL, NULL))
+    return NULL;
+
+  return ret;
+}
+
+static GFile *
+get_test_file (const char *name)
+{
+  g_assert_nonnull (g_getenv ("G_TEST_SRCDIR"));
+  return g_file_new_build_filename (g_getenv ("G_TEST_SRCDIR"), name, NULL);
+}
+
+static void
+test1 (void)
+{
+  GFile *file = get_test_file ("test-template-test1.tmpl");
+  GFile *expected = get_test_file ("test-template-test1.tmpl.expected");
+  TmplTemplate *tmpl = NULL;
+  TmplScope *scope = NULL;
+  GError *error = NULL;
+  char *str = NULL;
+  char *estr = NULL;
+  gboolean r;
+
+  tmpl = tmpl_template_new (NULL);
+  r = tmpl_template_parse_file (tmpl, file, NULL, &error);
+  g_assert_no_error (error);
+  g_assert_true (r);
+
+  scope = tmpl_scope_new ();
+  tmpl_scope_set_string (scope, "title", "My Title");
+  str = tmpl_template_expand_string (tmpl, scope, &error);
+  g_assert_no_error (error);
+  g_assert_nonnull (str);
+
+  estr = get_file_contents (expected);
+  g_assert_cmpstr (str, ==, estr);
+
+  g_free (estr);
+  g_free (str);
+  tmpl_scope_unref (scope);
+  g_assert_finalize_object (file);
+  g_assert_finalize_object (expected);
+  g_assert_finalize_object (tmpl);
+}
+
+gint
+main (gint   argc,
+      gchar *argv[])
+{
+  g_test_init (&argc, &argv, NULL);
+  g_test_add_func ("/Tmpl/Template/test1", test1);
+  return g_test_run ();
+}
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