test: Add `refute_regex.bats`

1 files changed, 98 insertions, 0 deletions

diff --git a/test/refute_regex.bats b/test/refute_regex.bats
new file mode 100644
index 0000000..c1fd1b2
--- /dev/null
+++ b/test/refute_regex.bats
@@ -0,0 +1,98 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+#
+# Literal matching
+#
+
+# Correctness
+@test "refute_regex() <value> <pattern>: fails if a <value> substring matches extended regular expression <pattern>" {
+  run refute_regex 'abc' '^[a-z]b'
+  assert_test_fail <<'ERR_MSG'
+
+-- value matches regular expression --
+value    : abc
+pattern  : ^[a-z]b
+match    : ab
+case     : sensitive
+--
+ERR_MSG
+}
+
+@test "refute_regex() <value> <pattern>: succeeds if no <value> substring matches extended regular expression <pattern>" {
+  run refute_regex 'bcd' '^[a-z]b[c-z]+'
+  assert_test_pass
+}
+
+@test "refute_regex() <value> <pattern>: provides results in BASH_REMATCH on failure" {
+  unset -v BASH_REMATCH
+
+  refute_regex 'abcd' 'b.d' \
+  || {
+      declare -p BASH_REMATCH && \
+      [ "${BASH_REMATCH[0]}" = 'bcd' ]
+  }
+}
+
+@test "refute_regex() <value> <pattern>: matches case-insensitively when 'nocasematch' is set" {
+  shopt -s nocasematch
+
+  run refute_regex 'aBc' 'ABC'
+  assert_test_fail <<'ERR_MSG'
+
+-- value matches regular expression --
+value    : aBc
+pattern  : ABC
+match    : aBc
+case     : insensitive
+--
+ERR_MSG
+}
+
+@test "refute_regex() <value> <pattern>: outputs multi-line <value> nicely when it fails" {
+  run refute_regex $'abc\n123' '^[a-z]b[c-z]+'
+  assert_test_fail <<'ERR_MSG'
+
+-- value matches regular expression --
+value (2 lines):
+  abc
+  123
+pattern (1 lines):
+  ^[a-z]b[c-z]+
+match (1 lines):
+  abc
+case (1 lines):
+  sensitive
+--
+ERR_MSG
+
+  shopt -s nocasematch
+  run refute_regex $'aBc\n123' '^[a-z]b[c-z]+'
+  assert_test_fail <<'ERR_MSG'
+
+-- value matches regular expression --
+value (2 lines):
+  aBc
+  123
+pattern (1 lines):
+  ^[a-z]b[c-z]+
+match (1 lines):
+  aBc
+case (1 lines):
+  insensitive
+--
+ERR_MSG
+}
+
+# Error handling
+@test "refute_regex() <value> <pattern>: returns 1 and displays an error message if <pattern> is not a valid extended regular expression" {
+  run refute_regex value '[.*'
+
+  assert_test_fail <<'ERR_MSG'
+
+-- ERROR: refute_regex --
+Invalid extended regular expression: `[.*'
+--
+ERR_MSG
+}