Implement generating non-matching regex strings

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 ## Unreleased
+### Added
+* Added ability to generate non-matching strings.
+  ([#447](https://github.com/FWDekker/intellij-randomness/issues/447))
+
 ### Changed
 * When inserting arrays at multiple carets, the number of elements per array is now independently chosen for each array.
   ([#450](https://github.com/FWDekker/intellij-randomness/issues/450))

src/main/kotlin/com/fwdekker/randomness/string/StringScheme.kt

@@ -19,15 +19,17 @@ import kotlin.random.asJavaRandom
  *
  * @property pattern The regex-like pattern according to which the string is generated.
  * @property isRegex `true` if and only if [pattern] should be interpreted as a regex.
- * @property removeLookAlikeSymbols Whether the symbols in [LOOK_ALIKE_CHARACTERS] should be removed.
+ * @property isNonMatching `true` if and only if non-matching values should be generated if [isRegex] is `true`.
  * @property capitalization The capitalization mode of the generated string.
+ * @property removeLookAlikeSymbols Whether the symbols in [LOOK_ALIKE_CHARACTERS] should be removed.
  * @property arrayDecorator Settings that determine whether the output should be an array of values.
  */
 data class StringScheme(
     var pattern: String = DEFAULT_PATTERN,
     var isRegex: Boolean = DEFAULT_IS_REGEX,
-    var removeLookAlikeSymbols: Boolean = DEFAULT_REMOVE_LOOK_ALIKE_SYMBOLS,
+    var isNonMatching: Boolean = DEFAULT_IS_NON_MATCHING,
     var capitalization: CapitalizationMode = DEFAULT_CAPITALIZATION,
+    var removeLookAlikeSymbols: Boolean = DEFAULT_REMOVE_LOOK_ALIKE_SYMBOLS,
     val arrayDecorator: ArrayDecorator = DEFAULT_ARRAY_DECORATOR,
 ) : Scheme() {
     override val name = Bundle("string.title")
@@ -50,7 +52,10 @@ data class StringScheme(
         val rawStrings =
             if (isRegex) {
                 val rgxGen = RgxGen(pattern)
-                List(count) { rgxGen.generate(random.asJavaRandom()) }
+                List(count) {
+                    if (this.isNonMatching) rgxGen.generateNotMatching(random.asJavaRandom())
+                    else rgxGen.generate(random.asJavaRandom())
+                }
             } else {
                 List(count) { pattern }
             }
@@ -73,7 +78,9 @@ data class StringScheme(
             else ->
                 @Suppress("detekt:TooGenericExceptionCaught") // Consequence of incomplete validation in RgxGen
                 try {
-                    RgxGen(pattern).generate()
+                    if (this.isNonMatching) RgxGen(pattern).generate()
+                    else RgxGen(pattern).generateNotMatching()
+
                     arrayDecorator.doValidate()
                 } catch (exception: RgxGenParseException) {
                     exception.message
@@ -117,9 +124,9 @@ data class StringScheme(
         const val DEFAULT_IS_REGEX = true
 
         /**
-         * The default value of the [removeLookAlikeSymbols] field.
+         * The default value of the [isNonMatching] field.
          */
-        const val DEFAULT_REMOVE_LOOK_ALIKE_SYMBOLS = false
+        const val DEFAULT_IS_NON_MATCHING = false
 
         /**
          * The preset values for the [capitalization] field.
@@ -136,6 +143,11 @@ data class StringScheme(
          */
         val DEFAULT_CAPITALIZATION get() = CapitalizationMode.RETAIN
 
+        /**
+         * The default value of the [removeLookAlikeSymbols] field.
+         */
+        const val DEFAULT_REMOVE_LOOK_ALIKE_SYMBOLS = false
+
         /**
          * The default value of the [arrayDecorator] field.
          */

src/main/kotlin/com/fwdekker/randomness/string/StringSchemeEditor.kt

@@ -18,6 +18,8 @@ import com.intellij.ui.dsl.builder.bindText
 import com.intellij.ui.dsl.builder.panel
 import com.intellij.ui.dsl.builder.toNullableProperty
 import com.intellij.ui.dsl.gridLayout.HorizontalAlign
+import com.intellij.ui.layout.selected
+import javax.swing.JCheckBox
 
 
 /**
@@ -38,19 +40,19 @@ class StringSchemeEditor(scheme: StringScheme = StringScheme()) : SchemeEditor<S
             }
 
             row("") {
+                lateinit var isRegexBox: JCheckBox
+
                 checkBox(Bundle("string.ui.value.is_regex_option"))
                     .loadMnemonic()
                     .withName("isRegex")
                     .bindSelected(scheme::isRegex)
-            }
+                    .also { isRegexBox = it.component }
 
-            row("") {
-                checkBox(Bundle("string.ui.value.remove_look_alike"))
+                checkBox(Bundle("string.ui.value.is_non_matching_option"))
                     .loadMnemonic()
-                    .withName("removeLookAlikeCharacters")
-                    .bindSelected(scheme::removeLookAlikeSymbols)
-
-                contextHelp(Bundle("string.ui.value.remove_look_alike_help", StringScheme.LOOK_ALIKE_CHARACTERS))
+                    .withName("isNonMatching")
+                    .bindSelected(scheme::isNonMatching)
+                    .enabledIf(isRegexBox.selected)
             }.bottomGap(BottomGap.SMALL)
 
             row(Bundle("string.ui.value.capitalization_option")) {
@@ -59,6 +61,15 @@ class StringSchemeEditor(scheme: StringScheme = StringScheme()) : SchemeEditor<S
                     .withName("capitalization")
                     .bindItem(scheme::capitalization.toNullableProperty())
             }
+
+            row {
+                checkBox(Bundle("string.ui.value.remove_look_alike"))
+                    .loadMnemonic()
+                    .withName("removeLookAlikeCharacters")
+                    .bindSelected(scheme::removeLookAlikeSymbols)
+
+                contextHelp(Bundle("string.ui.value.remove_look_alike_help", StringScheme.LOOK_ALIKE_CHARACTERS))
+            }
         }
 
         row {

src/main/resources/randomness.properties

@@ -107,6 +107,7 @@ string.error.trailing_backslash=Regex pattern must not end in unescaped backslas
 string.title=String
 string.ui.value.capitalization_option=&Capitalization:
 string.ui.value.header=Value
+string.ui.value.is_non_matching_option=&Non-matching
 string.ui.value.is_regex_option=Parse as rege&x
 string.ui.value.pattern_help=Supported syntax
 string.ui.value.pattern_help_url=https://github.com/curious-odd-man/RgxGen/tree/1.4#supported-syntax

src/test/kotlin/com/fwdekker/randomness/string/StringSchemeEditorTest.kt

@@ -74,6 +74,13 @@ object StringSchemeEditorTest : FunSpec({
                         false,
                     )
                 },
+                "isInverseRegex" to {
+                    row(
+                        frame.checkBox("isNonMatching").isSelectedProp(),
+                        editor.scheme::isNonMatching.prop(),
+                        true,
+                    )
+                },
                 "removeLookAlikeCharacters" to {
                     row(
                         frame.checkBox("removeLookAlikeCharacters").isSelectedProp(),

src/test/kotlin/com/fwdekker/randomness/string/StringSchemeTest.kt

@@ -23,24 +23,32 @@ object StringSchemeTest : FunSpec({
             mapOf(
                 "false if invalid" to
                     row(StringScheme(pattern = "{}"), false),
-                "false if pattern uses quantifier" to
-                    row(StringScheme(pattern = "[u]{4}"), false),
-                "false if pattern uses grouping" to
-                    row(StringScheme(pattern = "(a|b)"), false),
                 "true if pattern is plain string, as non-regex" to
                     row(StringScheme(pattern = "text", isRegex = false), true),
-                "true if pattern is plain string, as regex" to
-                    row(StringScheme(pattern = "text", isRegex = true), true),
+                "true if pattern is plain string, as matching regex" to
+                    row(StringScheme(pattern = "text"), true),
+                "false if pattern is plain string, as non-matching regex" to
+                    row(StringScheme(pattern = "text", isNonMatching = true), false),
                 "true if pattern escapes character, as non-regex" to
                     row(StringScheme(pattern = """te\[xt""", isRegex = false), true),
-                "true if pattern escapes character, as regex" to
-                    row(StringScheme(pattern = """te\[xt""", isRegex = true), true),
+                "true if pattern escapes character, as matching regex" to
+                    row(StringScheme(pattern = """te\[xt"""), true),
+                "false if pattern escapes character, as non-matching regex" to
+                    row(StringScheme(pattern = """te\[xt""", isNonMatching = true), false),
                 "true if pattern escapes backslash, as non-regex" to
                     row(StringScheme(pattern = """te\\xt""", isRegex = false), true),
-                "true if pattern escapes backslash, as regex" to
-                    row(StringScheme(pattern = """te\\xt""", isRegex = true), true),
-                "true if pattern uses quantifier, as non-regex" to
-                    row(StringScheme(pattern = "[u]{4}", isRegex = false), true),
+                "true if pattern escapes backslash, as matching regex" to
+                    row(StringScheme(pattern = """te\\xt"""), true),
+                "false if pattern escapes backslash, as non-matching regex" to
+                    row(StringScheme(pattern = """te\\xt""", isNonMatching = true), false),
+                "false if pattern uses quantifier, as matching regex" to
+                    row(StringScheme(pattern = "[u]{4}"), false),
+                "false if pattern uses quantifier, as non-matching regex" to
+                    row(StringScheme(pattern = "[u]{4}", isNonMatching = true), false),
+                "false if pattern uses grouping, as matching regex" to
+                    row(StringScheme(pattern = "(a|b)"), false),
+                "false if pattern uses grouping, as non-matching regex" to
+                    row(StringScheme(pattern = "(a|b)", isNonMatching = true), false),
             )
         ) { (scheme, isSimple) -> scheme.isSimple() shouldBe isSimple }
     }
@@ -63,6 +71,8 @@ object StringSchemeTest : FunSpec({
                     row(StringScheme(pattern = "a[bc]d", isRegex = false), "a[bc]d"),
                 "returns reverse-regexed string" to
                     row(StringScheme(pattern = "[x]{4}"), "xxxx"),
+                "returns non-matching reverse-regexed string" to
+                    row(StringScheme(pattern = ".", isNonMatching = true), ""),
             )
         ) { (scheme, output) -> scheme.generateStrings()[0] shouldBe output }
     }
@@ -72,8 +82,10 @@ object StringSchemeTest : FunSpec({
             mapOf(
                 "succeeds for default state" to
                     row(StringScheme(), null),
-                "fails if pattern is invalid" to
+                "fails if matching pattern is invalid" to
                     row(StringScheme(pattern = "{x"), ""),
+                "fails if non-matching pattern is invalid" to
+                    row(StringScheme(pattern = "{x", isNonMatching = true), ""),
                 "fails if pattern is empty curly braces" to
                     row(StringScheme(pattern = "{}"), "string.error.empty_curly"),
                 "fails if pattern has empty curly braces" to