Add doesNotContainMatch assertion for CharSequence

Author: Goooler

assertk/src/commonMain/kotlin/assertk/assertions/charsequence.kt

@@ -117,6 +117,14 @@ fun Assert<CharSequence>.doesNotContain(expected: Iterable<CharSequence>, ignore
     expected("to not contain:${show(expected)} but was:${show(actual)}")
 }
 
+/**
+ * Asserts the char sequence does not contain the expected regular expression.
+ */
+fun Assert<CharSequence>.doesNotContainMatch(regex: Regex) = given { actual ->
+    if (!regex.containsMatchIn(actual)) return
+    expected("to not contain match:${show(regex)} but was:${show(actual)}")
+}
+
 /**
  * Asserts the char sequence starts with the expected char sequence.
  * @param ignoreCase true to compare ignoring case, the default if false.

assertk/src/commonTest/kotlin/test/assertk/assertions/CharSequenceTest.kt

@@ -223,6 +223,22 @@ class CharSequenceTest {
     }
     //endregion
 
+    //region doesNotContainMatch
+    @Test
+    fun doesNotContainMatch_non_matching_value_passes() {
+        assertThat("abcd").doesNotContainMatch(Regex("\\d\\d\\d\\d"))
+    }
+
+    @Test
+    fun doesNotContainMatch_matching_value_fails() {
+        val regex = Regex("\\d\\d\\d\\d")
+        val error = assertFailsWith<AssertionError> {
+            assertThat("1234").doesNotContainMatch(regex)
+        }
+        assertEquals("expected to not contain match:${show(regex)} but was:<\"1234\">", error.message)
+    }
+    //endregion
+
     //region startsWith
     @Test
     fun startsWith_value_prefix_passes() {